/* ============================================================
   3DlogoGen — Design System Tokens (shared across all pages)
   ============================================================ */

:root {
    /* ---- Surfaces ---- */
    --bg-deep: #04060a;
    --bg-base: #07090d;
    --bg-surface: #0b0e14;
    --bg-elevated: #11151c;
    --bg-hover: #181d26;

    /* ---- Borders ---- */
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.14);
    --border-focus: rgba(111, 190, 255, 0.62);

    /* ---- Text ---- */
    --text-primary: #f5f7fa;
    --text-secondary: #a7b0ba;
    --text-muted: #6f7882;
    --text-subtle: #4a525c;

    /* ---- Accents (brand) ---- */
    --accent-aqua: #6fbeff;
    --accent-mint: #95f1d1;
    --accent-pink: #f0a3cb;
    --accent-glow: rgba(111, 190, 255, 0.20);
    --gradient-brand: linear-gradient(135deg, #95f1d1 0%, #6fbeff 50%, #f0a3cb 100%);
    --gradient-brand-soft: linear-gradient(135deg, rgba(149,241,209,0.15) 0%, rgba(111,190,255,0.15) 50%, rgba(240,163,203,0.15) 100%);
    --gradient-text: linear-gradient(135deg, #95f1d1 0%, #6fbeff 60%, #d9d2ff 100%);

    /* ---- Semantic ---- */
    --success: #68f0b6;
    --danger: #ff637d;
    --warning: #ffc97a;

    /* ---- Radii ---- */
    --r-xs: 6px;
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 16px;
    --r-xl: 22px;
    --r-pill: 999px;

    /* ---- Spacing scale ---- */
    --s-1: 4px;
    --s-2: 8px;
    --s-3: 12px;
    --s-4: 16px;
    --s-5: 20px;
    --s-6: 24px;
    --s-8: 32px;
    --s-10: 40px;
    --s-12: 48px;
    --s-16: 64px;
    --s-20: 80px;
    --s-24: 96px;

    /* ---- Type ---- */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', Menlo, monospace;

    /* ---- Effects ---- */
    --panel-blur: 22px;
    --transition: 200ms cubic-bezier(0.2, 0.7, 0.2, 1);
    --transition-fast: 120ms ease;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.20);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 0 1px rgba(111, 190, 255, 0.18), 0 16px 48px rgba(111, 190, 255, 0.18);

    /* ---- Layout ---- */
    --container: 1200px;
    --container-sm: 880px;
    --nav-h: 64px;

    /* ---- Z-index scale ---- */
    --z-canvas: 0;
    --z-base: 10;
    --z-overlay: 20;
    --z-nav: 50;
    --z-modal: 80;
    --z-toast: 90;
}

/* ============================================================
   Reset + base
   ============================================================ */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

html, body {
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(1200px 600px at 50% -200px, rgba(111, 190, 255, 0.08), transparent 60%),
        radial-gradient(800px 500px at 100% 100%, rgba(240, 163, 203, 0.05), transparent 60%),
        var(--bg-base);
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
}

input, select, textarea { font-family: inherit; font-size: inherit; }

::selection { background: rgba(149, 241, 209, 0.30); color: var(--text-primary); }

:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ============================================================
   Layout helpers
   ============================================================ */

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.container-sm {
    width: 100%;
    max-width: var(--container-sm);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--s-20) 0;
}

@media (max-width: 768px) {
    .section { padding: var(--s-16) 0; }
}

/* ============================================================
   Typography
   ============================================================ */

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(149, 241, 209, 0.08);
    border: 1px solid rgba(149, 241, 209, 0.25);
    border-radius: var(--r-pill);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--accent-mint);
    text-transform: uppercase;
}

.eyebrow .dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent-mint);
    box-shadow: 0 0 12px var(--accent-mint);
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.08;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.75rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.02;
}

h2 {
    font-size: clamp(2rem, 4vw, 3.25rem);
    letter-spacing: -0.025em;
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.625rem);
    letter-spacing: -0.015em;
}

.text-muted { color: var(--text-secondary); }
.text-subtle { color: var(--text-muted); }
.text-grad {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.lead {
    font-size: clamp(1rem, 1.4vw, 1.18rem);
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 60ch;
}

/* The HTML `hidden` attribute should always win over class-level display
   rules. Without `!important`, `.btn { display: inline-flex }` overrides the
   UA `[hidden] { display: none }` rule because of equal specificity + later
   cascade order. */
[hidden] { display: none !important; }

/* ============================================================
   Buttons
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    font-size: 14.5px;
    font-weight: 600;
    border-radius: var(--r-md);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition-fast), box-shadow var(--transition);
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    color: var(--text-primary);
    white-space: nowrap;
    user-select: none;
}

.btn:hover { background: var(--bg-hover); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }

.btn-primary {
    border: none;
    color: #051218;
    background: linear-gradient(180deg, #d6fbe9 0%, #88e6c5 60%, #67d8ff 100%);
    box-shadow: 0 8px 28px rgba(135, 230, 197, 0.20), inset 0 1px 0 rgba(255,255,255,0.55);
}
.btn-primary:hover {
    background: linear-gradient(180deg, #e7fff3 0%, #9fefd2 60%, #7adfff 100%);
    box-shadow: 0 12px 36px rgba(135, 230, 197, 0.30), inset 0 1px 0 rgba(255,255,255,0.65);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-secondary);
}
.btn-ghost:hover { color: var(--text-primary); background: rgba(255,255,255,0.04); }

.btn-lg { padding: 14px 26px; font-size: 15.5px; border-radius: var(--r-lg); }
.btn-sm { padding: 9px 14px; font-size: 13px; border-radius: var(--r-sm); }

/* ============================================================
   Glass / cards
   ============================================================ */

.glass {
    background: linear-gradient(180deg, rgba(20, 25, 33, 0.72), rgba(11, 14, 20, 0.72));
    backdrop-filter: blur(var(--panel-blur));
    -webkit-backdrop-filter: blur(var(--panel-blur));
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
}

.card {
    background: linear-gradient(180deg, rgba(17, 21, 28, 0.92), rgba(10, 12, 16, 0.92));
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 24px;
    transition: border-color var(--transition), transform var(--transition);
}
.card:hover { border-color: var(--border-strong); }

/* ============================================================
   Top navigation (shared)
   ============================================================ */

.nav-shell {
    position: fixed;
    inset: 16px 16px auto 16px;
    z-index: var(--z-nav);
    display: flex;
    justify-content: center;
    pointer-events: none;
}

.nav {
    width: 100%;
    max-width: var(--container);
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 10px 16px 10px 14px;
    background: linear-gradient(180deg, rgba(15, 19, 26, 0.85), rgba(8, 11, 16, 0.85));
    backdrop-filter: blur(var(--panel-blur)) saturate(140%);
    -webkit-backdrop-filter: blur(var(--panel-blur)) saturate(140%);
    border: 1px solid var(--border);
    border-radius: var(--r-pill);
    box-shadow: var(--shadow-md);
}

.nav .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 4px 8px 4px 4px;
    border-radius: var(--r-pill);
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.01em;
    font-size: 14.5px;
}
.nav .brand img { width: 30px; height: 30px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-links a {
    padding: 8px 14px;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--r-pill);
    transition: color var(--transition), background var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); background: rgba(255,255,255,0.05); }

.nav-cta {
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (max-width: 720px) {
    .nav-links { display: none; }
    .nav-shell { inset: 10px 10px auto 10px; }
    .nav { padding: 8px 8px 8px 12px; }
    .nav-cta .btn-ghost { display: none; }
}

/* ============================================================
   Footer (shared)
   ============================================================ */

.footer {
    border-top: 1px solid var(--border);
    padding: var(--s-16) 0 var(--s-10);
    margin-top: var(--s-20);
    background: linear-gradient(180deg, transparent, rgba(0,0,0,0.35));
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: var(--s-10);
    margin-bottom: var(--s-12);
}

.footer-grid .col-brand p {
    color: var(--text-secondary);
    margin-top: 14px;
    max-width: 32ch;
    font-size: 13.5px;
}

.footer h5 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.10em;
    color: var(--text-muted);
    margin-bottom: 14px;
    font-weight: 700;
}
.footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer ul a {
    color: var(--text-secondary);
    font-size: 13.5px;
    transition: color var(--transition);
}
.footer ul a:hover { color: var(--text-primary); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--s-6);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 12.5px;
    flex-wrap: wrap;
    gap: 12px;
}

@media (max-width: 720px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--s-8); }
    .footer-grid .col-brand { grid-column: 1 / -1; }
}

/* ============================================================
   Reduced motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}