@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ─── Tokens ─── */
:root {
    --bg: #fcfbf8;
    --bg-card: #ffffff;
    --bg-surface: #f5f4f1;
    --bg-input: #f8f7f5;
    --bg-code: #f9f9f9;
    --text: #1a1a1a;
    --text-2: #5c5c5c;
    --text-3: #999;
    --accent: #e85d26;
    --accent-hover: #d14f1e;
    --accent-soft: rgba(232, 93, 38, 0.07);
    --success: #1a8754;
    --success-soft: #edf8f2;
    --error: #d93025;
    --error-soft: #fef0ee;
    --warning: #c67b00;
    --warning-soft: #fef8eb;
    --border: #ebe8e4;
    --border-focus: #d5d1cc;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.03);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.05), 0 0 0 1px rgba(0,0,0,0.02);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.07);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.03), 0 0 0 1px rgba(0,0,0,0.03);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --font: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
    --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ─── Reset ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; height: 100%; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    height: 100%;
}

/* ─── Warning ─── */
.warning-banner {
    background: var(--error-soft);
    color: var(--error);
    text-align: center;
    padding: 10px 16px;
    font-weight: 500;
    font-size: 0.82rem;
}

/* ─── Top Nav ─── */
.topnav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 28px;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(252, 251, 248, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0,0,0,0.15);
}

.nav-left { display: flex; align-items: center; }

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}

.nav-logo {
    width: 32px;
    height: 32px;
    background: var(--text);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-logo svg { width: 17px; height: 17px; color: var(--bg); }

.nav-brand span {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.nav-right { display: flex; align-items: center; gap: 16px; }
.board-select-wrap { display: flex; align-items: center; gap: 8px; }

.board-select-wrap label {
    font-size: 0.78rem;
    color: var(--text-3);
    font-weight: 500;
}

select {
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 7px 30px 7px 14px;
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23999' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

select:hover { border-color: var(--border-focus); }
select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* ─── Nav Auth Buttons ─── */
.nav-auth-btn {
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    padding: 8px 16px;
    transition: all 0.15s;
}
.nav-auth-login {
    background: transparent;
    color: var(--text-2);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.nav-auth-login:hover { color: var(--text); }
.nav-auth-signup {
    background: var(--text);
    color: var(--bg);
}
.nav-auth-signup:hover { background: var(--accent); }
.nav-auth-signup:active { transform: scale(0.96); }

.nav-user-info { display: flex; align-items: center; gap: 8px; }
.nav-user-name { font-size: 14px; color: var(--muted); }
.nav-user-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }

/* ─── Nav Settings Button ─── */
.nav-settings-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    color: var(--text-2);
    cursor: pointer;
    transition: all 0.15s;
}
.nav-settings-btn:hover { background: var(--bg-surface); color: var(--text); border-color: var(--border-focus); }
.nav-settings-btn:active { transform: scale(0.95); }

/* ─── Settings Modal ─── */
.settings-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    animation: settingsFadeIn 0.15s var(--ease) both;
}
.settings-overlay.open {
    display: flex;
}
@keyframes settingsFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.settings-modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0,0,0,0.15), 0 0 0 1px rgba(0,0,0,0.05);
    width: 90%;
    max-width: 480px;
    max-height: 85vh;
    overflow-y: auto;
    animation: settingsSlideUp 0.2s var(--ease) both;
}
@keyframes settingsSlideUp {
    from { opacity: 0; transform: translateY(12px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0;
}
.settings-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}
.settings-close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-3);
    cursor: pointer;
    transition: all 0.12s;
}
.settings-close-btn:hover { background: var(--bg-surface); color: var(--text); }
.settings-body {
    padding: 20px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.settings-group {}
.settings-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 2px;
    cursor: default;
}
.settings-hint {
    font-size: 0.75rem;
    color: var(--text-3);
    margin-bottom: 8px;
    line-height: 1.4;
}
.settings-group select {
    width: 100%;
}
.settings-toggle-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}
.settings-toggle-row .settings-hint {
    margin-bottom: 0;
}

/* Logout */
.settings-logout-group {
    border-top: 1px solid var(--border);
    padding-top: 20px;
}
.settings-logout-btn {
    width: 100%;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--error);
    background: var(--error-soft);
    color: var(--error);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}
.settings-logout-btn:hover {
    background: var(--error);
    color: #fff;
}
.settings-logout-btn:active { transform: scale(0.98); }

/* Toggle switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
    margin-top: 2px;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--border);
    border-radius: var(--radius-full);
    transition: background 0.2s;
}
.toggle-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}
.toggle input:checked + .toggle-slider {
    background: var(--accent);
}
.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}
.toggle input:focus-visible + .toggle-slider {
    box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ═══════════════════════════════════════
   Landing View
   ═══════════════════════════════════════ */

.landing-main {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ─── Hero ─── */
.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 72px 0 0;
    min-height: 70vh;
    justify-content: center;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    margin-bottom: 40px;
    animation: heroFadeIn 1s ease both;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.02em;
    margin-bottom: 16px;
    animation: heroFadeIn 1s ease 0.2s both;
}

.hero h1 {
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.05;
    color: var(--text);
}

.hero-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, #d35400 50%, #e74c3c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    margin-top: 20px;
    font-size: 1.05rem;
    color: var(--text-2);
    font-weight: 300;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    animation: heroFadeIn 1s ease 0.35s both;
}

@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── Prompt Card ─── */
.prompt-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 620px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 6px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,0.02);
    margin-bottom: 40px;
    transition: box-shadow 0.25s var(--ease), border-color 0.2s;
    animation: heroFadeIn 1s ease 0.5s both;
}

.prompt-card:focus-within {
    box-shadow: var(--shadow-lg), 0 0 0 2px var(--accent-soft), 0 0 40px rgba(232,93,38,0.06);
    border-color: rgba(232,93,38,0.15);
}

.prompt-input-wrap {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 8px 8px 8px 18px;
}

textarea#landing-textarea,
textarea#chat-textarea,
textarea#welcome-textarea {
    flex: 1;
    min-height: 24px;
    max-height: 140px;
    padding: 8px 0;
    background: transparent;
    color: var(--text);
    border: none;
    font-family: var(--font);
    font-size: 0.92rem;
    resize: none;
    line-height: 1.5;
    overflow-y: auto;
}

textarea#landing-textarea:focus,
textarea#chat-textarea:focus,
textarea#welcome-textarea:focus { outline: none; }
textarea#landing-textarea::placeholder,
textarea#chat-textarea::placeholder,
textarea#welcome-textarea::placeholder { color: var(--text-3); }

.prompt-send-btn {
    width: 38px;
    height: 38px;
    min-width: 38px;
    border-radius: 10px;
    background: var(--text);
    color: var(--bg);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s var(--ease);
    padding: 0;
}

.prompt-send-btn svg { width: 15px; height: 15px; }

.prompt-send-btn:hover:not(:disabled) {
    background: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(232,93,38,0.25);
}

.prompt-send-btn:active:not(:disabled) { transform: scale(0.93); }
.prompt-send-btn:disabled { opacity: 0.25; cursor: not-allowed; }

.prompt-send-btn .prompt-btn-text {
    display: none;
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 600;
}
.prompt-send-btn:not(:disabled) {
    width: auto;
    padding: 0 14px;
    gap: 6px;
}
.prompt-send-btn:not(:disabled) .prompt-btn-text {
    display: inline;
}

/* ─── Auth Modal ─── */
.auth-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 1001;
    display: none;
    align-items: center;
    justify-content: center;
    animation: settingsFadeIn 0.15s var(--ease) both;
}
.auth-overlay.open { display: flex; }

.auth-modal {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 80px rgba(0,0,0,0.18), 0 0 0 1px rgba(0,0,0,0.05);
    width: 90%;
    max-width: 420px;
    animation: settingsSlideUp 0.2s var(--ease) both;
    overflow: hidden;
}

.auth-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--text-3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    z-index: 1;
}
.auth-close-btn:hover { background: var(--bg-surface); color: var(--text); }

.auth-header {
    padding: 40px 36px 0;
    text-align: center;
}
.auth-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
}

.auth-body {
    padding: 28px 36px 0;
}

.auth-social-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.auth-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 11px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}
.auth-social-btn:hover {
    background: var(--bg-surface);
    border-color: var(--border-focus);
}
.auth-social-btn:active { transform: scale(0.98); }

.auth-divider {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 22px 0;
    color: var(--text-3);
    font-size: 0.78rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-input {
    width: 100%;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.88rem;
    transition: all 0.15s;
}
.auth-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.auth-input::placeholder { color: var(--text-3); }

.auth-submit-btn {
    width: 100%;
    padding: 11px 16px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--accent);
    color: #fff;
    font-family: var(--font);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}
.auth-submit-btn:hover { background: var(--accent-hover); }
.auth-submit-btn:active { transform: scale(0.98); }

.auth-footer {
    padding: 20px 36px 32px;
    text-align: center;
    font-size: 0.84rem;
    color: var(--text-2);
}

.auth-switch-btn {
    background: none;
    border: none;
    color: var(--accent);
    font-family: var(--font);
    font-size: 0.84rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
}
.auth-switch-btn:hover { text-decoration: underline; }

/* ─── Hint Chips ─── */
.prompt-hints {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 4px 12px 12px;
}

.hint-chip {
    padding: 5px 14px;
    background: var(--bg-surface);
    color: var(--text-2);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    font-family: var(--font);
    font-size: 0.74rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s var(--ease);
}

.hint-chip:hover {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: rgba(232,93,38,0.12);
}

.hint-chip:active { transform: scale(0.96); }

/* ─── Ticker ─── */
.ticker-wrap {
    overflow: hidden;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin-bottom: 0;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
}

.ticker {
    display: flex;
    gap: 0;
    white-space: nowrap;
    animation: tickerScroll 30s linear infinite;
    width: max-content;
}

.ticker span {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-3);
    padding: 0 12px;
    letter-spacing: 0.01em;
}

.ticker-dot {
    color: var(--border) !important;
    padding: 0 4px !important;
}

@keyframes tickerScroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ─── Section Shared ─── */
.section-eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-eyebrow-light {
    color: rgba(232, 93, 38, 0.7);
}

/* ─── Scroll Reveal ─── */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ─── Insight ─── */
.insight-section {
    padding: 80px 24px;
    text-align: center;
}

.insight-inner {
    max-width: 640px;
    margin: 0 auto;
}

.insight-text {
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    font-weight: 300;
    line-height: 1.7;
    color: var(--text-2);
}

/* ─── Three Steps ─── */
.steps-section {
    background: var(--bg-surface);
    padding: 80px 24px;
    text-align: center;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
}

.steps-inner {
    max-width: 900px;
    margin: 0 auto;
}

.steps-section h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 40px;
    color: var(--text);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: left;
}

.step-card {
    padding: 28px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 700;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.step-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
    letter-spacing: -0.01em;
}

.step-card p {
    font-size: 0.85rem;
    color: var(--text-2);
    line-height: 1.6;
    font-weight: 300;
}

/* ─── Use Cases (Dark) ─── */
.usecases-section {
    background: var(--text);
    color: #fff;
    padding: 80px 24px;
    text-align: center;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
}

.usecases-inner {
    max-width: 900px;
    margin: 0 auto;
}

.usecases-section h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 40px;
    color: #fff;
}

.usecases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    text-align: left;
}

.usecase-card {
    padding: 28px 24px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.usecase-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

.usecase-emoji {
    font-size: 1.8rem;
    display: block;
    margin-bottom: 12px;
}

.usecase-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: #fff;
}

.usecase-card p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.6;
    font-weight: 300;
}

/* ─── Pull Quote ─── */
.quote-section {
    padding: 80px 24px;
    text-align: center;
}

.pull-quote {
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.35;
    color: var(--text);
    max-width: 640px;
    margin: 0 auto;
    quotes: none;
}

/* ─── Supported Boards ─── */
.boards-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px 80px;
    text-align: center;
}

.boards-section h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--text);
}

.boards-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.board-chip {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    transition: all 0.2s var(--ease);
}

.board-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
    transform: translateY(-1px);
}

/* ─── Footer ─── */
.site-footer {
    padding: 0 24px;
    border-top: 1px solid var(--border);
}

.footer-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 32px 0 28px;
}

.footer-top {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.03em;
}

.footer-brand .nav-logo {
    width: 28px;
    height: 28px;
}

.footer-brand .nav-logo svg {
    width: 14px;
    height: 14px;
}

.footer-divider {
    height: 1px;
    background: var(--border);
    margin-bottom: 16px;
}

.footer-bottom {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.footer-copy {
    font-size: 0.74rem;
    color: var(--text-3);
}

.footer-dot {
    color: var(--border);
    font-size: 0.74rem;
}

/* ─── Responsive (Landing) ─── */
@media (max-width: 768px) {
    .hero { padding: 48px 0 0; min-height: auto; }
    .hero h1 { font-size: clamp(2rem, 8vw, 3rem); }
    .steps-grid { grid-template-columns: 1fr; }
    .usecases-grid { grid-template-columns: 1fr; }
    .insight-section, .steps-section, .usecases-section, .quote-section { padding: 56px 16px; }
    .boards-section { padding: 0 16px 56px; }
    .footer-top { flex-direction: column; align-items: flex-start; gap: 8px; }
    .footer-bottom { flex-direction: column; align-items: flex-start; gap: 4px; }
    .footer-dot { display: none; }
}

/* ═══════════════════════════════════════
   Chat View
   ═══════════════════════════════════════ */

#chat-view {
    display: flex;
    flex-direction: row;
    height: calc(100vh - 61px);
    /* 61px = nav height */
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    position: relative;
}

/* ═══════════════════════════════════════
   Sidebar
   ═══════════════════════════════════════ */

.sidebar {
    width: 260px;
    min-width: 260px;
    height: 100%;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width 0.25s var(--ease), min-width 0.25s var(--ease), opacity 0.2s;
}

.sidebar.collapsed {
    width: 0;
    min-width: 0;
    opacity: 0;
    border-right: none;
    pointer-events: none;
}

.sidebar-top {
    padding: 16px 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-top-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

.sidebar-top-row .sidebar-btn {
    flex: 1;
}

.sidebar-collapse-btn {
    width: 34px;
    height: 34px;
    min-width: 34px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-3);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s;
}

.sidebar-collapse-btn:hover {
    background: rgba(0,0,0,0.04);
    color: var(--text);
}

.sidebar-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 14px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
    text-align: left;
}

.sidebar-btn:hover {
    background: rgba(0,0,0,0.04);
}

.sidebar-btn:active {
    background: rgba(0,0,0,0.07);
}

.sidebar-btn svg {
    width: 16px;
    height: 16px;
    color: var(--text-2);
    flex-shrink: 0;
}

.sidebar-search-box {
    padding: 4px 12px 8px;
}

.sidebar-search-box input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.82rem;
    color: var(--text);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.sidebar-search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.sidebar-search-box input::placeholder {
    color: var(--text-3);
}

.sidebar-section-label {
    padding: 12px 16px 6px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-3);
}

#starred-section {
    flex-shrink: 0;
}

#starred-section .sidebar-conversations {
    max-height: 180px;
    overflow-y: auto;
}

.sidebar-conversations {
    flex: 1;
    overflow-y: auto;
    padding: 0 8px;
}

.sidebar-conversation {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.83rem;
    font-weight: 400;
    cursor: pointer;
    transition: background 0.15s;
    text-align: left;
    position: relative;
}

.sidebar-conversation:hover {
    background: rgba(0,0,0,0.04);
}

.sidebar-conversation.active {
    background: rgba(0,0,0,0.06);
    font-weight: 500;
}

.sidebar-conversation-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.sidebar-conversation-star {
    flex-shrink: 0;
    color: var(--warning);
    display: flex;
    align-items: center;
}

.sidebar-conversation-star svg {
    width: 11px;
    height: 11px;
}

.sidebar-conversation-more {
    display: none;
    width: 24px;
    height: 24px;
    min-width: 24px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-3);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: color 0.12s, background 0.12s;
}

.sidebar-conversation:hover .sidebar-conversation-more {
    display: flex;
}

.sidebar-conversation-more:hover {
    color: var(--text);
    background: rgba(0,0,0,0.06);
}

.sidebar-conversation-more svg {
    width: 12px;
    height: 12px;
}

/* Chat context menu */
.chat-context-menu {
    position: fixed;
    z-index: 400;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.03);
    padding: 4px 0;
    min-width: 160px;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.12s, transform 0.12s;
}

.chat-context-menu.open {
    opacity: 1;
    transform: scale(1);
}

.chat-menu-item {
    display: flex;
    align-items: center;
    gap: 9px;
    width: 100%;
    padding: 8px 14px;
    background: transparent;
    border: none;
    border-radius: 0;
    color: var(--text);
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.1s;
    text-align: left;
}

.chat-menu-item:hover {
    background: rgba(0,0,0,0.04);
}

.chat-menu-item svg {
    width: 13px;
    height: 13px;
    color: var(--text-2);
    flex-shrink: 0;
}

.chat-menu-danger {
    color: var(--error);
}

.chat-menu-danger svg {
    color: var(--error);
}

.chat-menu-danger:hover {
    background: var(--error-soft);
}

.chat-menu-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

.sidebar-bottom {
    padding: 12px;
    border-top: 1px solid var(--border);
    margin-top: auto;
    position: relative;
}

/* User popup menu */
.user-popup {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 8px;
    right: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.03);
    padding: 8px 0;
    display: none;
    flex-direction: column;
    z-index: 300;
    animation: popupSlideUp 0.15s var(--ease) both;
}

.user-popup.open {
    display: flex;
}

@keyframes popupSlideUp {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.user-popup-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
}

.user-popup-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    overflow: hidden;
}

.user-popup-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-popup-email {
    font-size: 0.72rem;
    color: var(--text-3);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-popup-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

.user-popup-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 9px 14px;
    background: transparent;
    border: none;
    border-radius: 0;
    color: var(--text);
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.12s;
    text-align: left;
}

.user-popup-item:hover {
    background: rgba(0,0,0,0.04);
}

.user-popup-item:active {
    background: rgba(0,0,0,0.07);
}

.user-popup-item svg {
    width: 14px;
    height: 14px;
    color: var(--text-2);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s;
}

.sidebar-user:hover {
    background: rgba(0,0,0,0.04);
}

.sidebar-user-avatar {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 50%;
    background: var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-user-avatar svg {
    width: 16px;
    height: 16px;
    color: var(--text-2);
}

.sidebar-user-name {
    flex: 1;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-user-chevron {
    color: var(--text-3);
    flex-shrink: 0;
}

/* Collapsed icon rail */
.sidebar-rail {
    width: 48px;
    min-width: 48px;
    height: 100%;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: none;
    flex-direction: column;
    align-items: center;
    padding: 12px 0;
    gap: 4px;
}

.sidebar.collapsed ~ .sidebar-rail {
    display: flex;
}

.rail-btn {
    width: 36px;
    height: 36px;
    min-width: 36px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-2);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s;
}

.rail-btn:hover {
    background: rgba(0,0,0,0.05);
    color: var(--text);
}

.rail-btn:active {
    background: rgba(0,0,0,0.08);
}

.rail-btn svg {
    width: 16px;
    height: 16px;
}

.rail-spacer {
    flex: 1;
}

.rail-user-btn {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 50%;
    background: var(--border);
    color: var(--text-2);
    margin-top: auto;
}

.rail-user-btn:hover {
    background: var(--border-focus);
    color: var(--text);
}

/* Mobile sidebar */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 61px;
        left: 0;
        z-index: 200;
        height: calc(100vh - 61px);
        box-shadow: var(--shadow-lg);
    }
    .sidebar.collapsed {
        box-shadow: none;
    }
    .sidebar-rail {
        position: fixed;
        top: 61px;
        left: 0;
        z-index: 10;
        height: calc(100vh - 61px);
    }
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px 0 120px;
    position: relative;
}

.chat-messages {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* ─── Chat Welcome State ─── */
.chat-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    padding: 0 20px;
    text-align: center;
}
.chat-welcome-title {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 24px;
}
.chat-welcome-card {
    animation: none;
    margin-bottom: 0;
}
.chat-welcome.hidden {
    display: none;
}

/* ─── Chat Message ─── */
.chat-msg {
    display: flex;
    flex-direction: column;
    animation: fadeUp 0.3s var(--ease) both;
}

.chat-msg.user {
    align-items: flex-end;
}

.chat-msg.assistant {
    align-items: flex-start;
}

.chat-msg-bubble {
    max-width: 85%;
    line-height: 1.6;
}

.chat-msg.user .chat-msg-bubble {
    background: var(--bg-surface);
    border-radius: var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);
    padding: 12px 18px;
    font-size: 0.9rem;
    color: var(--text);
}

.chat-msg.assistant .chat-msg-bubble {
    width: 100%;
    max-width: 100%;
}

/* ─── Code Block (inside assistant message) ─── */
.chat-code-block {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-top: 4px;
}

.chat-code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    cursor: pointer;
    user-select: none;
    transition: background 0.15s;
}

.chat-code-header:hover {
    background: var(--border);
}

.chat-code-header-left {
    display: flex;
    align-items: center;
    gap: 6px;
}

.code-chevron {
    color: var(--text-3);
    transition: transform 0.2s var(--ease);
    transform: rotate(90deg);
}

.chat-code-block.collapsed .code-chevron {
    transform: rotate(0deg);
}

.chat-code-block .chat-code-body {
    transition: max-height 0.3s var(--ease), opacity 0.2s;
    max-height: 70vh;
    overflow: auto;
}

.chat-code-block.collapsed .chat-code-body {
    max-height: 0;
    opacity: 0;
}

.chat-code-block.collapsed .chat-code-header {
    border-bottom: none;
}

.chat-code-lang {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-3);
    font-weight: 500;
}

.chat-code-actions {
    display: flex;
    gap: 4px;
}

.chat-code-actions .btn-ghost.copied svg {
    color: var(--success);
}

.chat-code-body {
    overflow-x: auto;
    padding: 0;
}

.chat-code-body pre {
    margin: 0;
    padding: 14px 16px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.65;
    background: transparent;
    tab-size: 4;
    overflow-x: auto;
    white-space: pre;
}

.chat-code-body code {
    font-family: var(--font-mono);
    background: transparent;
    counter-reset: line;
}

.chat-code-body code .line-number {
    display: inline-block;
    width: 3ch;
    margin-right: 12px;
    text-align: right;
    color: var(--text-3);
    user-select: none;
    opacity: 0.5;
}

/* ─── Image Block (inside assistant message) ─── */
.chat-image-block {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    margin-top: 4px;
    background: #ffffff;
}

.chat-image-block img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius);
}

.wiring-warning {
    padding: 10px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #856404;
    background: #fff3cd;
    border-top: 2px solid #ffc107;
    text-align: center;
}

/* ─── Description text ─── */
.chat-description {
    margin-top: 12px;
    font-size: 0.88rem;
    color: var(--text-2);
    line-height: 1.65;
}

.chat-description code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    background: var(--bg-surface);
    padding: 1px 5px;
    border-radius: 4px;
    color: var(--accent);
}

.chat-description p {
    margin: 0 0 0.5em 0;
}

.chat-description p:last-child {
    margin-bottom: 0;
}

.chat-description ul, .chat-description ol {
    margin: 0.4em 0;
    padding-left: 1.4em;
}

.chat-description li {
    margin-bottom: 0.2em;
}

.chat-description strong {
    color: var(--text-1);
}

.chat-description h1, .chat-description h2, .chat-description h3 {
    font-size: 0.95rem;
    color: var(--text-1);
    margin: 0.6em 0 0.3em 0;
}

.chat-description pre {
    background: var(--bg-surface);
    padding: 8px 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 0.5em 0;
}

.chat-description blockquote {
    border-left: 3px solid var(--accent);
    margin: 0.5em 0;
    padding-left: 10px;
    color: var(--text-3);
}

/* ─── Action Buttons (under code block) ─── */
.chat-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
    align-items: center;
}

/* ─── Thinking / Loading indicator ─── */
.chat-thinking {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 0;
    color: var(--text-3);
    font-size: 0.85rem;
    animation: fadeUp 0.3s var(--ease) both;
}

.thinking-dots {
    display: flex;
    gap: 4px;
}

.thinking-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-3);
    animation: dotPulse 1.2s ease-in-out infinite;
}

.thinking-dots span:nth-child(2) { animation-delay: 0.15s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes dotPulse {
    0%, 80%, 100% { opacity: 0.25; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* ─── Chat Input Bar ─── */
.chat-input-bar {
    position: fixed;
    bottom: 0;
    left: 260px;
    right: 0;
    z-index: 50;
    padding: 12px 20px 16px;
    background: linear-gradient(to top, var(--bg) 80%, transparent);
    transition: bottom 0.3s var(--ease), left 0.25s var(--ease);
}

#chat-view.sidebar-collapsed .chat-input-bar {
    left: 48px;
}

.chat-input-wrap {
    max-width: 720px;
    margin: 0 auto;
}

.chat-input-inner {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 8px 8px 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-input-inner:focus-within {
    border-color: rgba(232,93,38,0.15);
    box-shadow: var(--shadow-lg), 0 0 0 2px var(--accent-soft);
}

.chat-input-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.chat-model-label {
    font-size: 0.72rem;
    color: var(--text-3);
    font-weight: 500;
    white-space: nowrap;
}

/* ═══════════════════════════════════════
   Bottom Panel (Build Log + Serial)
   ═══════════════════════════════════════ */

.panel-toggle {
    position: fixed;
    bottom: 76px;
    right: 20px;
    z-index: 60;
    display: none; /* shown after first generation */
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-2);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.15s, bottom 0.3s var(--ease);
}

.panel-toggle:hover {
    background: var(--bg-surface);
    color: var(--text);
}

.panel-toggle svg { flex-shrink: 0; }

.panel-chevron {
    transition: transform 0.2s;
}

.panel-toggle.open .panel-chevron {
    transform: rotate(180deg);
}

.bottom-panel {
    position: fixed;
    bottom: 0;
    left: 260px;
    right: 0;
    z-index: 55;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    transform: translateY(100%);
    transition: transform 0.3s var(--ease), left 0.25s var(--ease);
    max-height: 300px;
    display: flex;
    flex-direction: column;
}

#chat-view.sidebar-collapsed .bottom-panel {
    left: 48px;
}

.bottom-panel.open {
    transform: translateY(0);
}

/* ─── Output Tabs ─── */
.ws-output-tabs {
    display: flex;
    align-items: center;
    padding: 0 8px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    gap: 0;
    min-height: 36px;
}

.output-tab {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 12px;
    background: transparent;
    color: var(--text-3);
    border: none;
    border-bottom: 2px solid transparent;
    font-family: var(--font);
    font-size: 0.73rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    margin-bottom: -1px;
    border-radius: 0;
}

.output-tab .tab-icon {
    width: 11px;
    height: 11px;
    opacity: 0.4;
}

.output-tab:hover { color: var(--text-2); }

.output-tab.active {
    color: var(--text);
    border-bottom-color: var(--accent);
}

.output-tab.active .tab-icon {
    color: var(--accent);
    opacity: 0.8;
}

.output-tab-actions {
    margin-left: auto;
    display: flex;
    gap: 4px;
    align-items: center;
}

.output-pane { display: none; }
.output-pane.active { display: flex; flex-direction: column; }

.log-output {
    padding: 10px 14px;
    min-height: 80px;
    max-height: 200px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-2);
}

.log-output .log-info { color: var(--text-2); }
.log-output .log-success { color: var(--success); }
.log-output .log-error { color: var(--error); }
.log-output .log-warning { color: var(--warning); }

/* ─── Serial Monitor Input ─── */
.serial-input-row {
    display: flex;
    border-top: 1px solid var(--border);
}

.serial-input-row input {
    flex: 1;
    padding: 9px 14px;
    background: var(--bg-card);
    color: var(--text);
    border: none;
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.serial-input-row input:focus { outline: none; background: var(--bg-input); }
.serial-input-row input::placeholder { color: var(--text-3); }
.serial-input-row input:disabled { opacity: 0.35; }

#btn-serial-send {
    padding: 9px 14px;
    background: var(--bg-surface);
    color: var(--text);
    border-left: 1px solid var(--border);
    border-radius: 0;
    font-weight: 500;
    font-size: 0.75rem;
}

#btn-serial-send:hover:not(:disabled) { background: var(--border); }

/* Inline flash progress */
.inline-progress {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-top: 1px solid var(--border);
}

#flash-progress-bar {
    flex: 1;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

#flash-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s ease;
}

#flash-progress-text {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-2);
    min-width: 32px;
    font-weight: 500;
}

/* ─── Buttons ─── */
button {
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s var(--ease);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
}

button:active:not(:disabled) { transform: scale(0.97); }
button:disabled { opacity: 0.3; cursor: not-allowed; }
button svg { width: 13px; height: 13px; flex-shrink: 0; }

.btn-primary {
    background: var(--text);
    color: var(--bg);
}

.btn-primary:hover:not(:disabled) {
    background: #333;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.btn-accent {
    background: var(--accent);
    color: white;
}

.btn-accent:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 2px 8px rgba(232,93,38,0.2);
}

.btn-ghost {
    padding: 4px 8px;
    background: transparent;
    color: var(--text-2);
    font-size: 0.72rem;
    font-weight: 500;
}

.btn-ghost:hover {
    color: var(--text);
    background: rgba(0,0,0,0.03);
}

.btn-ghost svg { width: 12px; height: 12px; opacity: 0.5; }

.btn-connect {
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 3px 10px;
    font-size: 0.7rem;
}

.btn-connect:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

.btn-outline {
    padding: 6px 14px;
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 500;
}

.btn-outline:hover:not(:disabled) {
    border-color: var(--border-focus);
    background: var(--bg-surface);
}

.btn-outline svg { width: 13px; height: 13px; }

/* ─── Loading Spinner ─── */
button.loading {
    color: transparent !important;
    pointer-events: none;
}

button.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 14px;
    height: 14px;
    margin: -7px 0 0 -7px;
    border: 2px solid rgba(255,255,255,0.2);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.55s linear infinite;
}

.btn-outline.loading::after {
    border-color: rgba(0,0,0,0.1);
    border-top-color: var(--text);
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.15); }

/* ─── Animations ─── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
    .topnav { padding: 12px 16px; }
    .nav-brand span { font-size: 0.85rem; }
    .hero { padding: 50px 0 0; }
    .hero h1 { font-size: 2rem; }
    .hero-sub { font-size: 0.9rem; }
    .prompt-card { margin-bottom: 28px; }
    .landing-main { padding: 0 12px; }
    .chat-messages { padding: 0 12px; }
    .chat-input-bar { padding: 8px 12px 12px; }
    .chat-msg-bubble { max-width: 95% !important; }
}

/* ─── highlight.js overrides ─── */
.hljs {
    background: transparent !important;
    padding: 0 !important;
}

/* Ensure hljs syntax colors are not overridden */
.chat-code-body code.hljs .hljs-keyword { color: #d73a49; }
.chat-code-body code.hljs .hljs-built_in { color: #6f42c1; }
.chat-code-body code.hljs .hljs-type { color: #d73a49; }
.chat-code-body code.hljs .hljs-literal { color: #005cc5; }
.chat-code-body code.hljs .hljs-number { color: #005cc5; }
.chat-code-body code.hljs .hljs-string { color: #032f62; }
.chat-code-body code.hljs .hljs-comment { color: #6a737d; font-style: italic; }
.chat-code-body code.hljs .hljs-function { color: #6f42c1; }
.chat-code-body code.hljs .hljs-title { color: #6f42c1; }
.chat-code-body code.hljs .hljs-params { color: var(--text); }
.chat-code-body code.hljs .hljs-meta { color: #005cc5; }
.chat-code-body code.hljs .hljs-preprocessor { color: #d73a49; }

/* ═══════════════════════════════════════
   Port Picker Modal
   ═══════════════════════════════════════ */

.port-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0,0,0,0.25);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.port-modal-overlay.visible {
    opacity: 1;
}

.port-modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0,0,0,0.15), 0 0 0 1px rgba(0,0,0,0.03);
    width: 100%;
    max-width: 400px;
    overflow: hidden;
    transform: scale(0.96) translateY(8px);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.port-modal-overlay.visible .port-modal {
    transform: scale(1) translateY(0);
}

.port-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px 16px;
}

.port-modal-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.port-modal-close {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 50%;
    background: var(--bg-surface);
    color: var(--text-3);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: none;
    cursor: pointer;
    transition: all 0.15s;
}

.port-modal-close:hover {
    background: var(--border);
    color: var(--text);
}

.port-modal-body {
    padding: 0 16px;
}

.port-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.port-option {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-surface);
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    text-align: left;
    transition: all 0.15s var(--ease);
}

.port-option:hover {
    background: var(--accent-soft);
    border-color: rgba(232,93,38,0.15);
}

.port-option:active {
    transform: scale(0.98);
}

.port-option-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.port-option-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow: hidden;
}

.port-option-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.port-option-sub {
    font-size: 0.72rem;
    color: var(--text-3);
    font-weight: 400;
}

.port-empty {
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-3);
}

.port-modal-footer {
    padding: 12px 16px 16px;
}

.port-new-btn {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-2);
    font-size: 0.85rem;
    font-weight: 500;
    font-family: var(--font);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.15s var(--ease);
}

.port-new-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

.port-new-btn svg {
    color: currentColor;
}

/* ─── Admin Panel ─── */

.admin-modal {
    max-width: 960px;
    width: 95%;
}

.admin-tabs {
    display: flex;
    gap: 0;
    padding: 12px 24px 0;
    border-bottom: 1px solid var(--border);
}

.admin-tab {
    padding: 8px 16px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-3);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.admin-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.admin-tab:hover:not(.active) {
    color: var(--text-2);
}

.admin-body {
    padding: 16px 24px 24px;
    max-height: 60vh;
    overflow-y: auto;
}

.admin-summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.admin-stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
}

.admin-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.admin-stat-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-2);
    margin-top: 4px;
}

.admin-stat-sub {
    font-size: 0.72rem;
    color: var(--text-3);
    margin-top: 2px;
}

.admin-summary-lists {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 12px;
}

.admin-summary-list {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
}

.admin-summary-list-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-3);
    margin-bottom: 8px;
}

.admin-mini-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    font-size: 0.82rem;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.admin-mini-row:last-child {
    border-bottom: none;
}

.admin-mini-val {
    font-weight: 600;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.78rem;
    color: var(--text-2);
}

.admin-loading, .admin-empty {
    text-align: center;
    padding: 32px 0;
    color: var(--text-3);
    font-size: 0.85rem;
}

.admin-table-wrap {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.admin-table th {
    text-align: left;
    padding: 8px 10px;
    font-weight: 600;
    color: var(--text-3);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.admin-table td {
    padding: 10px 10px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.admin-table tbody tr:last-child td {
    border-bottom: none;
}

.admin-user-cell {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.admin-user-name {
    font-weight: 600;
    color: var(--text);
}

.admin-user-email {
    font-size: 0.72rem;
    color: var(--text-3);
}

.admin-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.admin-badge-admin {
    background: var(--accent-soft);
    color: var(--accent);
}

.admin-badge-user {
    background: var(--bg-surface);
    color: var(--text-3);
}

.admin-token-input {
    width: 90px;
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    background: var(--bg-input);
    color: var(--text);
}

.admin-token-input:focus {
    outline: none;
    border-color: var(--accent);
}

.admin-save-btn {
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.78rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: all 0.12s;
}

.admin-save-btn:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.admin-save-btn:disabled {
    opacity: 0.4;
    cursor: default;
}

.admin-actions-cell {
    display: flex;
    gap: 6px;
    align-items: center;
}

.admin-link-btn {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: all 0.12s;
    white-space: nowrap;
}

.admin-link-btn:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
}

.admin-delete-btn {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--error);
    font-size: 0.78rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: all 0.12s;
    white-space: nowrap;
}

.admin-delete-btn:hover {
    background: var(--error-soft);
    border-color: var(--error);
}

.admin-invite-form {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.admin-invite-row {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.admin-invite-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.admin-invite-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.admin-create-btn {
    opacity: 1 !important;
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.admin-create-btn:hover {
    background: var(--accent-hover) !important;
    border-color: var(--accent-hover) !important;
    color: #fff !important;
}

.admin-invite-feedback {
    font-size: 0.78rem;
    margin-top: 6px;
    min-height: 1.2em;
}

.admin-invite-feedback.success {
    color: var(--success);
}

.admin-invite-feedback.error {
    color: var(--error);
}

.admin-invite-code {
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.8rem;
    background: var(--bg-surface);
    padding: 2px 6px;
    border-radius: 4px;
    user-select: all;
    cursor: pointer;
    transition: all 0.15s;
}

.admin-invite-code:hover {
    background: var(--accent-soft);
    color: var(--accent);
}

.admin-invite-code.copied {
    background: var(--success-soft);
    color: var(--success);
}

.admin-badge-valid {
    background: var(--success-soft);
    color: var(--success);
}

.admin-badge-expired {
    background: var(--bg-surface);
    color: var(--text-3);
}

.admin-redeemed-cell > span {
    display: block;
}

.admin-redeemed-email {
    font-size: 0.75rem;
    color: var(--text-2);
}

.admin-text-muted {
    color: var(--text-3);
}

.admin-row-clickable {
    cursor: pointer;
    transition: background 0.1s;
}

.admin-row-clickable:hover {
    background: var(--accent-soft);
}

.admin-convo-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.admin-convo-meta {
    display: block;
    font-size: 0.75rem;
    color: var(--text-3);
}

.admin-back-btn {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-2);
    font-size: 0.78rem;
    font-family: var(--font);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.12s;
}

.admin-back-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.admin-messages {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.admin-msg {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.admin-msg-user {
    background: var(--bg-surface);
}

.admin-msg-assistant {
    background: var(--bg-card);
}

.admin-msg-role {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-3);
    margin-bottom: 4px;
}

.admin-msg-content {
    font-size: 0.82rem;
    color: var(--text);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}

.admin-msg-code {
    margin-top: 8px;
    padding: 8px 10px;
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    overflow-x: auto;
    white-space: pre;
}