/* ============================================
   pibiCo Brand Guidelines — CSS
   "Industrial Precision meets Digital Clarity"
   Version 2.0 — March 2026
   ============================================ */

/* --- Custom Properties --- */
:root {
    /* Typography — canonical api_collab stack (Inter as body, Montserrat as
       UI heading, Raleway reserved for brand/logo). Poppins is intentionally
       NOT in the fallback chain anymore; the canonical fonts.css doesn't
       declare it. */
    --font-brand: 'Raleway', 'Montserrat', 'Arial', sans-serif;
    --font-heading: 'Montserrat', 'Arial', 'Helvetica Neue', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code',
                 'SF Mono', 'Consolas', monospace;

    /* Primary Colors */
    --primary-color: #4682b4;
    --secondary-color: #6a9bc3;
    --accent-color: #2c5171;

    /* Text */
    --text-color: #333;
    --text-light: #666;

    /* Background */
    --bg-gradient: linear-gradient(135deg, #2c5171 0%, #4682b4 50%, #6a9bc3 100%);

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.3);

    /* Radius Tiers */
    --radius: 12px;
    --radius-sm: 8px;
    --radius-card: 24px;
    --radius-card-mobile: 20px;

    /* Extended Pastel Palette — Rose */
    --rose-50: #FFF0F0;  --rose-200: #FCCDD0;  --rose-400: #F28B93;
    --rose-600: #D4505E;  --rose-800: #9E3A4A;

    /* Extended Pastel Palette — Peach */
    --peach-50: #FFF4EC;  --peach-200: #FCDCC8;  --peach-400: #F2A872;
    --peach-600: #D47838;  --peach-800: #944A20;

    /* Extended Pastel Palette — Marigold */
    --marigold-50: #FFF8E6;  --marigold-200: #FCE8A8;  --marigold-400: #F2C84E;
    --marigold-600: #C49A18;  --marigold-800: #7A5A10;

    /* Extended Pastel Palette — Mint */
    --mint-50: #ECFDF5;  --mint-200: #B8F0D8;  --mint-400: #5CCEA0;
    --mint-600: #28946A;  --mint-800: #1A5C3A;

    /* Extended Pastel Palette — Lavender */
    --lavender-50: #F4F0FF;  --lavender-200: #D8CCFA;  --lavender-400: #A88EF0;
    --lavender-600: #7456C8;  --lavender-800: #4A3580;

    /* Extended Pastel Palette — Orchid */
    --orchid-50: #FDF0F8;  --orchid-200: #F5CCE2;  --orchid-400: #E48EBE;
    --orchid-600: #C0508A;  --orchid-800: #7A2E5A;

    /* Extended Pastel Palette — Sky */
    --sky-50: #EEF6FF;  --sky-200: #C0DFFA;  --sky-400: #6AB4F0;
    --sky-600: #2E82C8;  --sky-800: #1A4A7A;

    /* Extended Pastel Palette — Slate */
    --slate-50: #F0F2F5;  --slate-200: #CDD2DA;  --slate-400: #8E96A8;
    --slate-600: #5A6478;  --slate-800: #3A4050;

    /* Tab Mask Radii */
    --tab-scoop: 14px;
    --tab-corner: 10px;
    --tab-body-corner: 20px;
    --tab-scoop-v: 12px;
    --tab-corner-v: 8px;
    --tab-body-corner-v: 16px;
}

/* --- Base Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.2;
    color: var(--text-color);
    background: var(--bg-gradient);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6,
.app-header-title {
    font-family: var(--font-heading);
    color: var(--text-color);
    line-height: 1.1;
}

h1 { font-size: 1.5rem; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 600; }
h3 { font-size: 1rem; font-weight: 600; }
h4 { font-size: 0.875rem; font-weight: 500; }

code, pre, .mono {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

.brand-text, .tagline, .lema {
    font-family: var(--font-brand);
}

p, li, td, th, label, span {
    line-height: 1.2;
}

small, .text-caption {
    font-size: 0.75rem;
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-color);
}

/* --- App Layout --- */
.app-layout {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
}

/* --- Navbar (App Header) --- */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    line-height: 1;
}

.app-header-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--accent-color);
}

.app-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Main Content --- */
.app-main {
    flex: 1;
    padding: 1rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* --- Tab Card Area (Three-Layer Architecture) --- */
.pibico-card-area {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Layer 1: Glass background (decorative, masked by JS) */
.pibico-glass {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    pointer-events: none;
    z-index: 1;
}

/* Layer 2: Tab Row — sits on the gradient, always visible */
.pibico-tab-row {
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 3;
}

/* Tier gating — hide ALL [data-tier-feature] by default; JS reveals allowed.
   Prevents flash of forbidden tabs on page load before tier resolves. */
[data-tier-feature]:not(.tier-allowed) {
    display: none !important;
}

.pibico-tab {
    min-width: 56px;
    padding: 6px 10px 5px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.15s;
    border: none;
    background: none;
    font-family: var(--font-body);
    white-space: nowrap;
}

.pibico-tab:hover {
    color: white;
}

.pibico-tab.active {
    color: var(--accent-color);
}

.pibico-tab svg {
    width: 18px;
    height: 18px;
}

.pibico-tab-label {
    font-size: 8px;
    font-weight: 500;
    line-height: 1;
}

.pibico-tab.active .pibico-tab-label {
    font-weight: 600;
}

/* Layer 3: Content — normal flow */
.pibico-content {
    position: relative;
    z-index: 2;
    padding: 14px 18px;
    font-family: var(--font-body);
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pibico-section-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 12px;
}

/* --- Language Selector --- */
.pibico-lang-dropdown {
    position: relative;
    font-family: var(--font-body);
}

.pibico-lang-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--accent-color);
    background: rgba(255, 255, 255, 0.5);
    font-family: var(--font-body);
}

.pibico-flag {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 1px solid rgba(0, 0, 0, 0.1);
    display: inline-flex;
}

.pibico-flag svg {
    display: block;
    width: 100%;
    height: 100%;
}

.pibico-lang-arrow {
    font-size: 8px;
    color: #999;
    margin-left: 1px;
}

.pibico-lang-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    overflow: hidden;
    min-width: 120px;
    z-index: 200;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.pibico-lang-menu.open {
    display: block;
}

.pibico-lang-opt {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    font-size: 0.6875rem;
    color: var(--text-color);
    cursor: pointer;
    transition: background 0.15s;
}

.pibico-lang-opt:hover {
    background: rgba(70, 130, 180, 0.08);
}

.pibico-lang-opt.selected {
    font-weight: 600;
    color: var(--accent-color);
}

/* --- Cards (Glassmorphism) --- */
.pibico-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    line-height: 1.2;
}

.pibico-card > * {
    line-height: 1.1;
}

/* --- Slide Panel --- */
.pibico-panel-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.pibico-panel-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.pibico-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 45%;
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--glass-border);
    box-shadow: -4px 0 16px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.pibico-panel.active {
    transform: translateX(0);
}

.pibico-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--accent-color);
    color: white;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    position: sticky;
    top: 0;
    z-index: 1;
    line-height: 1.1;
}

.pibico-panel-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.pibico-panel-close:hover {
    background: rgba(255, 255, 255, 0.15);
}

.pibico-panel-body {
    padding: 16px;
    flex: 1;
    overflow-y: auto;
}

/* --- Buttons --- */
.pibico-btn {
    padding: 3px 1rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.875rem;
    line-height: 1.2;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.pibico-btn-primary:hover:not(:disabled) {
    background: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(70, 130, 180, 0.3);
}

.pibico-btn-icon {
    background: transparent;
    border: 1px solid var(--glass-border);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pibico-btn-icon:hover:not(:disabled) {
    background: rgba(70, 130, 180, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.pibico-btn-icon svg {
    width: 16px;
    height: 16px;
    color: var(--text-light);
}

.pibico-btn-outline {
    background: transparent;
    color: var(--primary-color);
    box-shadow: inset 0 0 0 1.5px var(--primary-color);
}

.pibico-btn-outline:hover:not(:disabled) {
    background: rgba(70, 130, 180, 0.1);
}

.pibico-btn-ghost {
    background: transparent;
    color: var(--text-light);
}

.pibico-btn-ghost:hover:not(:disabled) {
    background: rgba(70, 130, 180, 0.1);
    color: var(--text-color);
}

.pibico-btn-danger {
    background: #ef4444;
    color: white;
}

.pibico-btn-danger:hover:not(:disabled) {
    background: #dc2626;
    transform: translateY(-1px);
}

.pibico-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Form Inputs --- */
.pibico-input,
.pibico-select,
.pibico-textarea {
    width: 100%;
    padding: 3px 1rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.875rem;
    line-height: 1.2;
    background: white;
    color: var(--text-color);
    transition: all 0.2s;
}

.pibico-input:focus,
.pibico-select:focus,
.pibico-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(70, 130, 180, 0.1);
}

.pibico-input:disabled,
.pibico-select:disabled,
.pibico-textarea:disabled {
    background: rgba(255, 255, 255, 0.5);
    cursor: not-allowed;
}

.pibico-label {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.7rem;
    color: var(--text-light);
    margin-bottom: 2px;
    display: block;
}

/* --- Tables --- */
.pibico-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-body);
    font-size: 0.875rem;
    line-height: 1.2;
}

.pibico-table th {
    background: var(--accent-color);
    color: white;
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 6px 12px;
    text-align: left;
}

.pibico-table th:first-child {
    border-radius: var(--radius-sm) 0 0 0;
}

.pibico-table th:last-child {
    border-radius: 0 var(--radius-sm) 0 0;
}

.pibico-table td {
    padding: 4px 12px;
    border-bottom: 1px solid var(--glass-border);
}

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

.pibico-table tr:hover td {
    background: rgba(70, 130, 180, 0.1);
}

/* --- Badges & Tags --- */
.pibico-badge {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 999px;
    line-height: 1.2;
}

.pibico-badge-blue {
    background: rgba(70, 130, 180, 0.15);
    color: var(--accent-color);
}

.pibico-badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: #059669;
}

.pibico-badge-warning {
    background: rgba(251, 191, 36, 0.15);
    color: #d97706;
}

.pibico-badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: #dc2626;
}

.pibico-badge-grey {
    background: rgba(148, 163, 184, 0.15);
    color: var(--text-light);
}

/* --- Extended Palette Badges --- */
.pibico-badge-rose {
    background: var(--rose-50);
    color: var(--rose-800);
}

.pibico-badge-peach {
    background: var(--peach-50);
    color: var(--peach-800);
}

.pibico-badge-marigold {
    background: var(--marigold-50);
    color: var(--marigold-800);
}

.pibico-badge-mint {
    background: var(--mint-50);
    color: var(--mint-800);
}

.pibico-badge-lavender {
    background: var(--lavender-50);
    color: var(--lavender-800);
}

.pibico-badge-orchid {
    background: var(--orchid-50);
    color: var(--orchid-800);
}

.pibico-badge-sky {
    background: var(--sky-50);
    color: var(--sky-800);
}

.pibico-badge-slate {
    background: var(--slate-50);
    color: var(--slate-800);
}

/* --- Extended Palette Card Accents --- */
.pibico-accent-rose    { border-left: 3px solid var(--rose-400); }
.pibico-accent-peach   { border-left: 3px solid var(--peach-400); }
.pibico-accent-marigold{ border-left: 3px solid var(--marigold-400); }
.pibico-accent-mint    { border-left: 3px solid var(--mint-400); }
.pibico-accent-lavender{ border-left: 3px solid var(--lavender-400); }
.pibico-accent-orchid  { border-left: 3px solid var(--orchid-400); }
.pibico-accent-sky     { border-left: 3px solid var(--sky-400); }
.pibico-accent-slate   { border-left: 3px solid var(--slate-400); }

/* --- Extended Palette KPI Tints (subtle bg inside glass cards) --- */
.pibico-tint-rose      { background: var(--rose-50); }
.pibico-tint-peach     { background: var(--peach-50); }
.pibico-tint-marigold  { background: var(--marigold-50); }
.pibico-tint-mint      { background: var(--mint-50); }
.pibico-tint-lavender  { background: var(--lavender-50); }
.pibico-tint-orchid    { background: var(--orchid-50); }
.pibico-tint-sky       { background: var(--sky-50); }
.pibico-tint-slate     { background: var(--slate-50); }

/* --- Status Indicators --- */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-connected    { background: #10b981; }
.status-connecting   { background: #fbbf24; animation: pulse 1.5s ease-in-out infinite; }
.status-disconnected { background: #ef4444; }
.status-inactive     { background: #94a3b8; }

/* --- Footer --- */
.app-footer {
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.08);
    font-family: var(--font-body);
    font-size: 0.75rem;
    color: var(--text-light);
    line-height: 1;
}

.app-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.app-footer a:hover {
    text-decoration: underline;
}

.footer-sep {
    color: #ccc;
}

/* --- Animations --- */
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%      { opacity: 0.5; transform: scale(1.2); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { transform: translateX(100%); }
    to   { transform: translateX(0); }
}

/* --- Utility Classes --- */
.pibico-flex { display: flex; }
.pibico-flex-col { flex-direction: column; }
.pibico-items-center { align-items: center; }
.pibico-justify-between { justify-content: space-between; }
.pibico-gap-sm { gap: 0.375rem; }
.pibico-gap-md { gap: 0.75rem; }
.pibico-gap-lg { gap: 1.25rem; }
.pibico-grid { display: grid; }
.pibico-grid-2 { grid-template-columns: repeat(2, 1fr); }
.pibico-grid-3 { grid-template-columns: repeat(3, 1fr); }

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(70, 130, 180, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(70, 130, 180, 0.5);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .pibico-panel {
        width: 85%;
    }

    .app-header {
        padding: 0 1rem;
    }

    .app-footer {
        font-size: 0.7rem;
        padding: 0 1rem;
    }

    .pibico-grid-2,
    .pibico-grid-3 {
        grid-template-columns: 1fr;
    }

    h1 { font-size: 1.25rem; }
    h2 { font-size: 1.1rem; }

    /* Mobile tabs: vertical sidebar */
    .pibico-tab-row {
        flex-direction: column;
        width: 44px;
        justify-content: flex-start;
    }

    .pibico-tab {
        width: 44px;
        padding: 8px 0;
    }

    .pibico-tab svg {
        width: 16px;
        height: 16px;
    }

    .pibico-tab-label {
        font-size: 7px;
    }

    .pibico-card-area {
        display: flex;
    }

    .pibico-content {
        flex: 1;
        min-width: 0;
        padding: 12px;
    }

    .pibico-card {
        border-radius: var(--radius-card-mobile);
    }

    .pibico-flag {
        width: 20px;
        height: 20px;
    }

    .pibico-lang-btn {
        padding: 3px 6px;
    }

    .pibico-lang-btn span:not(.pibico-lang-arrow) {
        display: none;
    }
}


/* ============================================
   Talk2Doc — Landing & Auth UI
   ============================================ */

/* ─── Login / Landing shell: centers content vertically ─── */
.t2d-login-shell {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 48px - 28px);
    padding: 2rem 1rem;
}

/* ─── Glass panel card ─── */
.t2d-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    padding: 2.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* ─── Login card variant ─── */
.t2d-login-card {
    width: 100%;
    max-width: 420px;
}
.t2d-login-card h1 {
    text-align: center;
    font-family: var(--font-brand);
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}
.t2d-login-card h1 .brand {
    font-weight: 300;
}
.t2d-login-card label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 0.25rem;
    margin-top: 0.75rem;
}
.t2d-login-card input[type="email"],
.t2d-login-card input[type="password"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid rgba(70, 130, 180, 0.25);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.875rem;
    background: rgba(255, 255, 255, 0.7);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.t2d-login-card input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(70, 130, 180, 0.15);
}

/* ─── Buttons ─── */
.t2d-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #fff;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s ease;
    line-height: 1.2;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(70, 130, 180, 0.25);
}
.t2d-btn:hover {
    background: linear-gradient(135deg, var(--accent-color), #1e3a52);
    box-shadow: 0 4px 16px rgba(70, 130, 180, 0.35);
    transform: translateY(-1px);
}
.t2d-btn.full {
    width: 100%;
    margin-top: 1.25rem;
}
.t2d-btn.ghost {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid rgba(70, 130, 180, 0.4);
    box-shadow: none;
}
.t2d-btn.ghost:hover {
    background: rgba(70, 130, 180, 0.08);
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(70, 130, 180, 0.15);
}
.t2d-btn.sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

/* ─── Error message ─── */
.t2d-error {
    color: var(--rose-600);
    font-size: 0.8rem;
    margin-top: 0.5rem;
    min-height: 1.2em;
}

/* ─── Footer — canonical .app-footer link/button reset ─── */
.app-footer a,
.app-footer .footer-link-btn {
    color: var(--primary-color);
    text-decoration: none;
    background: transparent;
    border: 0;
    padding: 0;
    font: inherit;
    cursor: pointer;
}
.app-footer a:hover,
.app-footer .footer-link-btn:hover { text-decoration: underline; }
.app-footer .footer-link-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ─── Landing page ─── */
.t2d-landing {
    padding: 0 1rem;
    overflow-y: auto;
    height: calc(100vh - 48px - 28px);
}
.t2d-landing-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 0 3rem;
}

/* Hero */
.t2d-hero {
    text-align: center;
    padding: 4rem 0 3rem;
    position: relative;
    min-height: 440px;
}
.t2d-hero-brand,
.t2d-hero-sub,
.t2d-hero-actions {
    position: relative;
    z-index: 1;
}
.t2d-hero-brand {
    font-family: var(--font-brand);
    font-size: 3.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #d0e4f5 40%, #ffffff 70%, #a8cce0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.2));
}
.t2d-hero-brand .brand-light { font-weight: 300; }
.t2d-hero-brand .brand-bold { font-weight: 700; }
.t2d-hero-sub {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 1.5rem;
    font-weight: 400;
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
}
.t2d-hero-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}
#t2d-book-canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}
.t2d-hero .t2d-btn {
    padding: 0.7rem 1.5rem;
    font-size: 0.95rem;
    color: #fff;
}
.t2d-hero .t2d-btn:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: #fff;
}
.t2d-hero .t2d-btn.ghost {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}
.t2d-hero .t2d-btn.ghost:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
}

/* Hero narrative subtitles — cinema-style dark box */
.t2d-hero-narrative {
    position: relative;
    z-index: 1;
    margin: 2.5rem auto 0;
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 6px;
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-style: italic;
    color: #fff;
    letter-spacing: 0.02em;
    min-height: 1.5em;
    transition: opacity 0.4s ease;
    opacity: 0;
}
.t2d-hero-narrative:empty {
    background: transparent;
}

/* Section titles — gradient text */
.t2d-section-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff, #d0e4f5, #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin: 2.5rem 0 1.25rem;
    filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.15));
    letter-spacing: 0.03em;
}

/* Feature grid */
.t2d-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}
.t2d-feature-card {
    background: linear-gradient(160deg, rgba(255,255,255,0.97) 0%, rgba(245,249,255,0.95) 100%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(70, 130, 180, 0.15);
    border-radius: var(--radius);
    padding: 3px 1rem 12px;
    text-align: center;
    line-height: 1.1;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.t2d-feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 28px rgba(70, 130, 180, 0.18), 0 2px 8px rgba(0,0,0,0.06);
}
.t2d-card-illus {
    display: block;
    width: 100%;
    max-width: 140px;
    height: 52px;
    margin: 6px auto 4px;
}
.t2d-feature-icon {
    font-size: 1.6rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 3px;
    filter: drop-shadow(0 2px 6px rgba(70, 130, 180, 0.3));
}
.t2d-feature-card h3 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 3px;
    line-height: 1.1;
    transition: filter 0.25s ease;
}
.t2d-feature-card:hover h3 {
    filter: drop-shadow(0 0 6px rgba(70, 130, 180, 0.5));
}
.t2d-feature-card p {
    font-size: 0.78rem;
    color: #5a6a7a;
    line-height: 1.2;
}

/* Pricing grid */
.t2d-pricing {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}
.t2d-price-card {
    background: linear-gradient(170deg, rgba(255,255,255,0.98) 0%, rgba(248,252,255,0.96) 100%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(70, 130, 180, 0.12);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    position: relative;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.t2d-price-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 32px rgba(70, 130, 180, 0.18), 0 2px 8px rgba(0,0,0,0.06);
}
.t2d-price-card.featured {
    border: 2px solid transparent;
    background: linear-gradient(170deg, rgba(255,255,255,0.96), rgba(230,242,255,0.95)) padding-box,
                linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--primary-color)) border-box;
    box-shadow: 0 6px 28px rgba(70, 130, 180, 0.25);
}
.t2d-price-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 3px 14px;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(70, 130, 180, 0.3);
}
.t2d-price-card h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}
.t2d-price-amount {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0.5rem 0;
}
.t2d-price-amount span {
    font-size: 0.85rem;
    font-weight: 400;
    -webkit-text-fill-color: var(--text-light);
}
.t2d-price-card ul {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
    text-align: left;
}
.t2d-price-card li {
    font-size: 0.8rem;
    color: var(--text-color);
    padding: 0.3rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.t2d-price-card li i {
    background: linear-gradient(135deg, var(--mint-600), var(--mint-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 0.9rem;
}

/* Lang switcher on landing */
.t2d-lang-switch {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    gap: 0.25rem;
}
.t2d-lang-switch button {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
}
.t2d-lang-switch button:hover,
.t2d-lang-switch button.active {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

/* Auth gate (fallback panel when not logged in) */
.t2d-auth-gate {
    display: flex;
    align-items: center;
    justify-content: center;
    height: calc(100vh - 48px - 28px);
    padding: 2rem;
}
.t2d-auth-card {
    max-width: 480px;
    width: 100%;
    text-align: center;
}
.t2d-auth-card h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}
.t2d-auth-card p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 1.25rem;
}
.t2d-auth-card .t2d-btn {
    padding: 0.7rem 1.75rem;
    font-size: 0.95rem;
}

/* ─── Landing slide panels ─── */
.t2d-slide-panel {
    position: fixed;
    top: 0; right: 0; bottom: 0; left: 0;
    z-index: 2000;
    pointer-events: none;
    visibility: hidden;
}
.t2d-slide-panel.open {
    pointer-events: auto;
    visibility: visible;
}
.t2d-slide-backdrop {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.t2d-slide-panel.open .t2d-slide-backdrop {
    opacity: 1;
}
.t2d-slide-content {
    position: absolute;
    top: 0; right: 0; bottom: 0;
    width: 400px;
    max-width: 90vw;
    background: #fff;
    padding: 2rem 1.75rem;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    font-family: var(--font-body);
}
.t2d-slide-panel.open .t2d-slide-content {
    transform: translateX(0);
}
.t2d-slide-close {
    position: absolute;
    top: 1rem; right: 1rem;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}
.t2d-slide-close:hover {
    color: var(--accent-color);
}
.t2d-slide-content h2 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
}
.t2d-slide-content p {
    font-size: 0.875rem;
    color: var(--text-color);
    line-height: 1.4;
    margin-bottom: 0.75rem;
}
.t2d-slide-content ul {
    list-style: none;
    padding: 0;
    margin: 0.75rem 0;
}
.t2d-slide-content li {
    font-size: 0.85rem;
    color: var(--text-color);
    padding: 0.25rem 0;
    padding-left: 1.2rem;
    position: relative;
}
.t2d-slide-content li::before {
    content: '\2022';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
    .t2d-hero-brand { font-size: 2.25rem; }
    .t2d-hero-sub { font-size: 0.95rem; }
    .t2d-panel { padding: 1.5rem; }
    .t2d-features { grid-template-columns: 1fr; }
    .t2d-pricing { grid-template-columns: 1fr; }
}