/* ==========================================================================
   Zero Layer — design system
   Dark is the base theme; light is opt-in via [data-theme="light"].
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */

:root,
:root[data-theme="dark"] {
    /* Surfaces */
    --bg:            #07070b;
    --bg-elev:       #0d0d15;
    --surface:       #101018;
    --surface-2:     #15151f;
    --surface-hover: #1a1a26;
    --border:        #1e1e2c;
    --border-strong: #2b2b3d;

    /* Text */
    --text:      #ecebf5;
    --text-2:    #a3a3bd;
    /* Muted text is kept at WCAG AA (>=4.5:1) against both bg and card. */
    --text-3:    #8585a3;

    /* Brand + accents */
    --brand:       #7c5bf0;
    --brand-2:     #a78bfa;
    --brand-soft:  rgba(124, 91, 240, 0.14);
    --brand-line:  rgba(124, 91, 240, 0.32);
    --green:  #34d399;
    --blue:   #60a5fa;
    --orange: #fb923c;
    --pink:   #f472b6;
    --teal:   #2dd4bf;
    --red:    #fb7185;
    --yellow: #fbbf24;

    /* Effects */
    --nav-bg:    rgba(7, 7, 11, 0.72);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow:    0 12px 32px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 32px 80px rgba(0, 0, 0, 0.55);
    --glow:      0 0 60px rgba(124, 91, 240, 0.18);
    --mesh-1: rgba(124, 91, 240, 0.16);
    --mesh-2: rgba(45, 212, 191, 0.08);
    --mesh-3: rgba(244, 114, 182, 0.07);
    --grain-opacity: 0.028;
    --code-bg: #0a0a11;
}

:root[data-theme="light"] {
    --bg:            #fbfbfd;
    --bg-elev:       #ffffff;
    --surface:       #ffffff;
    --surface-2:     #f5f5fa;
    --surface-hover: #f0f0f7;
    --border:        #e7e7f0;
    --border-strong: #d2d2e2;

    --text:   #12121a;
    --text-2: #55556e;
    --text-3: #6b6b84;

    --brand:      #6d4bd8;
    --brand-2:    #6d4bd8;
    --brand-soft: rgba(109, 75, 216, 0.10);
    --brand-line: rgba(109, 75, 216, 0.26);
    --green:  #0f9d70;
    --blue:   #2563eb;
    --orange: #ea580c;
    --pink:   #db2777;
    --teal:   #0d9488;
    --red:    #dc2626;
    --yellow: #b45309;

    --nav-bg:    rgba(251, 251, 253, 0.78);
    --shadow-sm: 0 1px 2px rgba(30, 20, 70, 0.06);
    --shadow:    0 12px 32px rgba(40, 25, 90, 0.10);
    --shadow-lg: 0 32px 70px rgba(40, 25, 90, 0.14);
    --glow:      0 0 60px rgba(124, 91, 240, 0.14);
    --mesh-1: rgba(124, 91, 240, 0.16);
    --mesh-2: rgba(45, 212, 191, 0.10);
    --mesh-3: rgba(244, 114, 182, 0.09);
    --grain-opacity: 0.02;
    --code-bg: #14141d;
}

:root {
    /* Type scale */
    --font-sans: 'Inter var', Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Fira Code', ui-monospace, monospace;

    --step--1: clamp(0.82rem, 0.80rem + 0.10vw, 0.88rem);
    --step-0:  clamp(0.95rem, 0.92rem + 0.15vw, 1.02rem);
    --step-1:  clamp(1.08rem, 1.02rem + 0.30vw, 1.22rem);
    --step-2:  clamp(1.30rem, 1.18rem + 0.60vw, 1.65rem);
    --step-3:  clamp(1.65rem, 1.40rem + 1.20vw, 2.35rem);
    --step-4:  clamp(2.10rem, 1.65rem + 2.20vw, 3.30rem);
    --step-5:  clamp(2.70rem, 1.90rem + 3.90vw, 4.75rem);

    /* Spacing rhythm */
    --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
    --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px;
    --sp-9: 96px; --sp-10: 128px;

    --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 22px; --r-2xl: 30px;
    --maxw: 1180px;
    --nav-h: 68px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 16px);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--step-0);
    line-height: 1.65;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'ss01';
    transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.025em; font-weight: 700; }
h1 { font-size: var(--step-5); font-weight: 800; letter-spacing: -0.04em; }
h2 { font-size: var(--step-4); font-weight: 800; letter-spacing: -0.032em; }
h3 { font-size: var(--step-1); }
p  { color: var(--text-2); }
a  { color: inherit; }

code, pre, .mono, kbd {
    font-family: var(--font-mono);
    font-variant-ligatures: none;
}

::selection { background: var(--brand); color: #fff; }

:where(a, button, select, summary, [tabindex]):focus-visible {
    outline: 2px solid var(--brand-2);
    outline-offset: 3px;
    border-radius: var(--r-sm);
}

/* --------------------------------------------------------------------------
   3. Layout primitives
   -------------------------------------------------------------------------- */

.container {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: var(--sp-5);
    position: relative;
    z-index: 1;
}
.container-narrow { max-width: 860px; }

.section { padding-block: clamp(64px, 9vw, 128px); position: relative; }
.section-alt { background: var(--bg-elev); border-block: 1px solid var(--border); }

.stack-sm > * + * { margin-top: var(--sp-3); }
.center { text-align: center; }

/* Backdrop: gradient mesh + grain */
.backdrop {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.backdrop::before {
    content: '';
    position: absolute;
    top: -30%; left: 50%;
    width: 130vw; height: 110vh;
    transform: translateX(-50%);
    background:
        radial-gradient(42% 42% at 28% 22%, var(--mesh-1), transparent 62%),
        radial-gradient(38% 38% at 76% 34%, var(--mesh-3), transparent 64%),
        radial-gradient(46% 46% at 52% 78%, var(--mesh-2), transparent 66%);
    filter: blur(18px);
    animation: drift 22s ease-in-out infinite alternate;
}
.backdrop::after {
    content: '';
    position: absolute;
    inset: -100%;
    opacity: var(--grain-opacity);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}
@keyframes drift {
    0%   { transform: translateX(-50%) translateY(0) scale(1); }
    100% { transform: translateX(-50%) translateY(-4%) scale(1.08); }
}

/* --------------------------------------------------------------------------
   4. Navigation
   -------------------------------------------------------------------------- */

.nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, background-color 0.3s;
}
.nav.is-scrolled { border-bottom-color: var(--border); }

.nav-progress {
    position: absolute;
    left: 0; bottom: -1px;
    height: 2px;
    width: 0%;
    background: linear-gradient(90deg, var(--brand), var(--pink), var(--orange));
    transition: width 0.1s linear;
}

.nav-inner {
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: var(--sp-5);
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
    text-decoration: none;
    color: var(--text);
    flex-shrink: 0;
}
.brand svg { width: 30px; height: 30px; border-radius: 9px; display: block; }
.brand-sub {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-3);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 1px 5px;
    margin-left: 2px;
}

.nav-links { display: flex; align-items: center; gap: var(--sp-5); }
.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-2);
    text-decoration: none;
    transition: color 0.18s;
    white-space: nowrap;
}
.nav-links a:hover { color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: var(--sp-2); flex-shrink: 0; }

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    border-radius: var(--r-md);
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-2);
    cursor: pointer;
    transition: all 0.18s;
}
.icon-btn:hover { color: var(--text); background: var(--surface-hover); border-color: var(--border-strong); }

.lang { position: relative; display: inline-flex; align-items: center; }
.lang .globe { position: absolute; left: 11px; pointer-events: none; color: var(--text-3); }
.lang::after {
    content: '';
    position: absolute; right: 12px;
    width: 6px; height: 6px;
    border-right: 2px solid var(--text-3);
    border-bottom: 2px solid var(--text-3);
    transform: rotate(45deg) translateY(-2px);
    pointer-events: none;
}
.lang select {
    appearance: none; -webkit-appearance: none;
    height: 40px;
    padding: 0 30px 0 32px;
    border-radius: var(--r-md);
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    font: inherit; font-size: 0.85rem; font-weight: 600;
    cursor: pointer;
    transition: all 0.18s;
}
.lang select:hover { background: var(--surface-hover); border-color: var(--border-strong); }

.theme-toggle .moon { display: none; }
:root[data-theme="light"] .theme-toggle .sun { display: none; }
:root[data-theme="light"] .theme-toggle .moon { display: block; }

.menu-btn { display: none; }

/* --------------------------------------------------------------------------
   5. Buttons & pills
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 13px 24px;
    border-radius: var(--r-md);
    font-size: 0.94rem;
    font-weight: 650;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: transform 0.18s var(--ease), box-shadow 0.2s, background-color 0.2s, border-color 0.2s;
}
.btn:active { transform: translateY(0) scale(0.99); }

.btn-primary {
    background: linear-gradient(135deg, var(--brand), #6947e0);
    color: #fff;
    box-shadow: 0 6px 22px rgba(124, 91, 240, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 34px rgba(124, 91, 240, 0.45); }

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}
.btn-secondary:hover { background: var(--surface-hover); border-color: var(--border-strong); transform: translateY(-2px); }

.btn-ghost { background: transparent; color: var(--text-2); border-color: var(--border); }
.btn-ghost:hover { color: var(--text); border-color: var(--border-strong); }

.btn-sm { padding: 9px 16px; font-size: 0.86rem; }
.btn-lg { padding: 15px 30px; font-size: 1rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--sp-3); }
.btn-row.center { justify-content: center; }

.pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 15px;
    border-radius: 100px;
    background: var(--brand-soft);
    border: 1px solid var(--brand-line);
    font-size: 0.82rem;
    font-weight: 650;
    color: var(--brand-2);
    letter-spacing: -0.01em;
}
.pill .dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.18);
    animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

/* --------------------------------------------------------------------------
   6. Section headers
   -------------------------------------------------------------------------- */

.sec-head { max-width: 720px; margin-bottom: var(--sp-8); }
.sec-head.center { margin-inline: auto; text-align: center; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--brand-2);
    margin-bottom: var(--sp-3);
}
.eyebrow::before {
    content: '';
    width: 18px; height: 1px;
    background: currentColor;
    opacity: 0.6;
}
.sec-head.center .eyebrow::before { display: none; }

.sec-title { margin-bottom: var(--sp-4); }
.sec-lede { font-size: var(--step-1); color: var(--text-2); line-height: 1.6; }

.gradient-text {
    background: linear-gradient(115deg, var(--brand-2) 8%, var(--pink) 52%, var(--orange) 92%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --------------------------------------------------------------------------
   7. Hero
   -------------------------------------------------------------------------- */

.hero {
    padding-top: calc(var(--nav-h) + clamp(56px, 8vw, 104px));
    padding-bottom: clamp(56px, 8vw, 96px);
    text-align: center;
}
.hero h1 { margin: var(--sp-5) 0 var(--sp-5); }
.hero-lede {
    font-size: var(--step-1);
    max-width: 660px;
    margin: 0 auto var(--sp-6);
    color: var(--text-2);
}

/* Inline install command */
.install-line {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-3);
    max-width: 100%;
    margin-top: var(--sp-6);
    padding: 10px 10px 10px 18px;
    border-radius: 100px;
    background: var(--surface);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.86rem;
    box-shadow: var(--shadow-sm);
}
.install-line code { color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.install-line .tick { color: var(--brand-2); }

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    padding: 7px 13px;
    border-radius: 100px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-2);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s;
}
.copy-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface-hover); }
.copy-btn.is-copied { color: var(--green); border-color: var(--green); }

/* Stats strip */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-4);
    margin-top: var(--sp-8);
    padding: var(--sp-5) var(--sp-4);
    border-radius: var(--r-xl);
    background: var(--surface);
    border: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num {
    display: block;
    font-size: var(--step-3);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
}
.stat-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-3);
    margin-top: 4px;
    letter-spacing: 0.01em;
}

/* --------------------------------------------------------------------------
   8. Terminal
   -------------------------------------------------------------------------- */

.terminal {
    max-width: 760px;
    margin: var(--sp-8) auto 0;
    border-radius: var(--r-xl);
    background: var(--code-bg);
    border: 1px solid #1e1e2c;
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--glow);
    text-align: left;
}
.terminal-bar {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 13px 16px;
    background: rgba(255, 255, 255, 0.028);
    border-bottom: 1px solid #1e1e2c;
}
.tdot { width: 11px; height: 11px; border-radius: 50%; }
.tdot.r { background: #ff5f57; } .tdot.y { background: #febc2e; } .tdot.g { background: #28c840; }
.terminal-title {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: #6e6e88;
}
.terminal-body {
    padding: 20px 22px 24px;
    font-family: var(--font-mono);
    font-size: 0.845rem;
    line-height: 1.85;
    color: #ecebf5;
    overflow-x: auto;
    min-height: 260px;
}
.terminal-body .prompt  { color: var(--brand-2); }
.terminal-body .flag    { color: #60a5fa; }
.terminal-body .comment { color: #6e6e88; }
.terminal-body .ok      { color: #34d399; }
.terminal-body .warn    { color: #fbbf24; }
.terminal-body .dim     { color: #8b8ba6; }
.terminal-body .line    { white-space: pre; }
.cursor {
    display: inline-block;
    width: 8px; height: 1.05em;
    background: var(--brand-2);
    vertical-align: text-bottom;
    animation: caret 1.05s step-end infinite;
}
@keyframes caret { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* --------------------------------------------------------------------------
   9. Cards & grids
   -------------------------------------------------------------------------- */

.card {
    padding: var(--sp-6);
    border-radius: var(--r-lg);
    background: var(--surface);
    border: 1px solid var(--border);
    transition: transform 0.22s var(--ease), border-color 0.22s, background-color 0.22s, box-shadow 0.22s;
}
.card:hover {
    background: var(--surface-hover);
    border-color: var(--border-strong);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}
.card h3 { margin-bottom: var(--sp-2); font-size: var(--step-1); }
.card p  { font-size: 0.92rem; line-height: 1.65; }

.ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px; height: 46px;
    border-radius: var(--r-md);
    margin-bottom: var(--sp-4);
    font-size: 1.25rem;
}

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); }

/* Bento */
.bento {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--sp-4);
}
.bento > .card { grid-column: span 2; }
.bento > .card.span-3 { grid-column: span 3; }
.bento > .card.span-4 { grid-column: span 4; }
.bento > .card.span-6 { grid-column: span 6; }

.card-feature {
    position: relative;
    overflow: hidden;
}
.card-feature::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(60% 60% at 80% 0%, var(--brand-soft), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}
.card-feature:hover::after { opacity: 1; }

.tag-list { display: flex; flex-wrap: wrap; gap: 7px; margin-top: var(--sp-4); }
.tag {
    font-family: var(--font-mono);
    font-size: 0.73rem;
    padding: 4px 9px;
    border-radius: 6px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-2);
}

/* --------------------------------------------------------------------------
   10. Problem cards (contrast section)
   -------------------------------------------------------------------------- */

.pain { border-left: 2px solid var(--red); }
.pain .ico { background: rgba(251, 113, 133, 0.12); color: var(--red); }
.gain { border-left: 2px solid var(--green); }

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-7);
    align-items: center;
}

/* --------------------------------------------------------------------------
   11. Pipeline (how it works)
   -------------------------------------------------------------------------- */

.pipeline {
    display: grid;
    gap: var(--sp-4);
    counter-reset: pstep;
    position: relative;
}
.pstep {
    position: relative;
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: var(--sp-5);
    align-items: start;
    padding: var(--sp-5) var(--sp-5) var(--sp-5) 0;
    counter-increment: pstep;
}
.pstep::before {
    content: counter(pstep, decimal-leading-zero);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px; height: 56px;
    border-radius: var(--r-md);
    background: var(--surface);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--brand-2);
    z-index: 1;
}
.pstep::after {
    content: '';
    position: absolute;
    left: 28px; top: 76px; bottom: -16px;
    width: 1px;
    background: linear-gradient(var(--border-strong), transparent);
}
.pstep:last-child::after { display: none; }
.pstep h3 { font-size: var(--step-1); margin-bottom: 6px; }
.pstep p { font-size: 0.92rem; }
.pstep-meta {
    display: inline-block;
    margin-top: 10px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--text-3);
    padding: 3px 9px;
    border-radius: 6px;
    background: var(--surface-2);
    border: 1px solid var(--border);
}

/* --------------------------------------------------------------------------
   12. Sources
   -------------------------------------------------------------------------- */

.source-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: var(--sp-3);
}
.source {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: 14px 16px;
    border-radius: var(--r-md);
    background: var(--surface);
    border: 1px solid var(--border);
    transition: all 0.2s var(--ease);
}
.source:hover { border-color: var(--border-strong); background: var(--surface-hover); transform: translateY(-2px); }
.source-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.source-name { font-weight: 650; font-size: 0.92rem; }
.source-desc { display: block; font-size: 0.76rem; color: var(--text-3); font-weight: 400; }

/* --------------------------------------------------------------------------
   13. Tabs (command explorer)
   -------------------------------------------------------------------------- */

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--sp-5);
    padding: 6px;
    border-radius: var(--r-md);
    background: var(--surface);
    border: 1px solid var(--border);
}
.tab {
    flex: 1 1 auto;
    padding: 9px 16px;
    border: none;
    border-radius: var(--r-sm);
    background: transparent;
    color: var(--text-2);
    font: inherit;
    font-size: 0.87rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.18s;
}
.tab:hover { color: var(--text); background: var(--surface-hover); }
.tab[aria-selected="true"] {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 4px 14px rgba(124, 91, 240, 0.3);
}

.tabpanel[hidden] { display: none; }

.codeblock {
    position: relative;
    border-radius: var(--r-lg);
    background: var(--code-bg);
    border: 1px solid #1e1e2c;
    overflow: hidden;
}
.codeblock pre {
    margin: 0;
    padding: var(--sp-5) var(--sp-5);
    font-family: var(--font-mono);
    font-size: 0.845rem;
    line-height: 1.9;
    color: #ecebf5;
    overflow-x: auto;
}
.codeblock .c-cmd { color: #ecebf5; }
.codeblock .c-flag { color: #60a5fa; }
.codeblock .c-note { color: #6e6e88; }
.codeblock .c-prompt { color: var(--brand-2); }
.codeblock .copy-btn {
    position: absolute;
    top: 12px; right: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.09);
    color: #a3a3bd;
}
.codeblock .copy-btn:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }

/* --------------------------------------------------------------------------
   14. Comparison table
   -------------------------------------------------------------------------- */

.table-wrap {
    overflow-x: auto;
    border-radius: var(--r-lg);
    border: 1px solid var(--border);
    background: var(--surface);
    -webkit-overflow-scrolling: touch;
}
table.compare {
    width: 100%;
    min-width: 640px;
    border-collapse: collapse;
    font-size: 0.9rem;
}
table.compare th, table.compare td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
table.compare thead th {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-3);
    font-weight: 650;
    background: var(--surface-2);
    white-space: nowrap;
}
table.compare tbody th { font-weight: 600; color: var(--text); white-space: nowrap; }
table.compare td { color: var(--text-2); }
table.compare tbody tr:last-child th,
table.compare tbody tr:last-child td { border-bottom: none; }
table.compare .col-zl { background: var(--brand-soft); color: var(--text); font-weight: 600; }
table.compare thead .col-zl { background: rgba(124, 91, 240, 0.2); color: var(--brand-2); }
.yes { color: var(--green); font-weight: 700; }
.no  { color: var(--text-3); }

/* --------------------------------------------------------------------------
   15. Steps (get started)
   -------------------------------------------------------------------------- */

.start-step { display: grid; gap: var(--sp-3); }
.start-step h3 {
    display: flex; align-items: center; gap: 10px;
    font-size: var(--step-1);
}
.start-step h3 .num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; flex-shrink: 0;
    border-radius: 8px;
    background: var(--brand-soft);
    border: 1px solid var(--brand-line);
    color: var(--brand-2);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 700;
}

/* Release notice — the published binary trails what this page describes */
.notice {
    display: flex;
    align-items: flex-start;
    gap: var(--sp-3);
    padding: 14px 18px;
    border-radius: var(--r-md);
    background: rgba(251, 191, 36, 0.07);
    border: 1px solid rgba(251, 191, 36, 0.28);
    font-size: 0.87rem;
    line-height: 1.6;
    color: var(--text-2);
    text-align: left;
}
.notice .notice-ico { color: var(--yellow); flex-shrink: 0; font-size: 1rem; line-height: 1.5; }
.notice a { color: var(--brand-2); text-decoration: none; font-weight: 600; }
.notice a:hover { text-decoration: underline; }
.notice-inline {
    max-width: 620px;
    margin: var(--sp-5) auto 0;
}
/* Green variant, for good news rather than caveats. */
.notice-ok {
    background: rgba(52, 211, 153, 0.07);
    border-color: rgba(52, 211, 153, 0.30);
}
.notice-ok .notice-ico { color: var(--green); }
:root[data-theme="light"] .notice-ok {
    background: rgba(15, 157, 112, 0.07);
    border-color: rgba(15, 157, 112, 0.28);
}

/* --------------------------------------------------------------------------
   16. FAQ
   -------------------------------------------------------------------------- */

.faq { display: grid; gap: var(--sp-3); }
.faq details {
    border-radius: var(--r-md);
    background: var(--surface);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: border-color 0.2s, background-color 0.2s;
}
.faq details[open] { border-color: var(--border-strong); background: var(--surface-2); }
.faq summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    padding: 18px 20px;
    font-weight: 650;
    font-size: 0.98rem;
    cursor: pointer;
    list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: '';
    width: 9px; height: 9px; flex-shrink: 0;
    border-right: 2px solid var(--text-3);
    border-bottom: 2px solid var(--text-3);
    transform: rotate(45deg) translateY(-2px);
    transition: transform 0.25s var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-2px); }
.faq .faq-body { padding: 0 20px 20px; font-size: 0.92rem; color: var(--text-2); line-height: 1.7; }
.faq .faq-body code {
    font-size: 0.85em;
    padding: 2px 6px;
    border-radius: 5px;
    background: var(--surface-hover);
    border: 1px solid var(--border);
}

/* --------------------------------------------------------------------------
   17. CTA
   -------------------------------------------------------------------------- */

.cta {
    position: relative;
    overflow: hidden;
    border-radius: var(--r-2xl);
    padding: clamp(40px, 6vw, 76px) clamp(24px, 5vw, 60px);
    text-align: center;
    background:
        radial-gradient(70% 130% at 50% 0%, rgba(124, 91, 240, 0.16), transparent 70%),
        var(--surface);
    border: 1px solid var(--brand-line);
    box-shadow: var(--shadow);
}
.cta h2 { margin-bottom: var(--sp-4); }
.cta p { font-size: var(--step-1); max-width: 560px; margin: 0 auto var(--sp-6); }

/* --------------------------------------------------------------------------
   18. Footer
   -------------------------------------------------------------------------- */

.footer {
    border-top: 1px solid var(--border);
    background: var(--bg-elev);
    padding-block: var(--sp-8) var(--sp-6);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr repeat(3, 1fr);
    gap: var(--sp-7);
    padding-bottom: var(--sp-7);
    border-bottom: 1px solid var(--border);
}
.footer-about p {
    font-size: 0.88rem;
    max-width: 320px;
    margin-top: var(--sp-3);
}
.footer-col h4 {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--text-3);
    margin-bottom: var(--sp-4);
    font-weight: 650;
}
.footer-col ul { list-style: none; display: grid; gap: 10px; }
.footer-col a {
    font-size: 0.88rem;
    color: var(--text-2);
    text-decoration: none;
    transition: color 0.18s;
}
.footer-col a:hover { color: var(--text); }

.socials { display: flex; gap: 10px; margin-top: var(--sp-5); }
.socials a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    border-radius: var(--r-md);
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-2);
    transition: all 0.2s var(--ease);
}
.socials a:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface-hover); transform: translateY(-2px); }

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-3);
    padding-top: var(--sp-5);
    font-size: 0.83rem;
    color: var(--text-3);
}
.footer-bottom a { color: var(--brand-2); text-decoration: none; }
.footer-bottom a:hover { text-decoration: underline; }

/* --------------------------------------------------------------------------
   19. Reveal animation
   -------------------------------------------------------------------------- */

.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal-stagger.is-visible > * { opacity: 1; transform: none; }
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.04s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.10s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.16s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.22s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.28s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.34s; }

.skip-link {
    position: absolute;
    left: -9999px;
    top: 8px;
    z-index: 200;
    padding: 10px 18px;
    border-radius: var(--r-md);
    background: var(--brand);
    color: #fff;
    font-weight: 600;
    text-decoration: none;
}
.skip-link:focus { left: 16px; }

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* --------------------------------------------------------------------------
   20. Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1000px) {
    .bento > .card,
    .bento > .card.span-3,
    .bento > .card.span-4 { grid-column: span 3; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-6); }
}

@media (max-width: 900px) {
    .menu-btn { display: inline-flex; }
    .nav-links {
        position: absolute;
        top: var(--nav-h); left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: var(--sp-3) var(--sp-5) var(--sp-5);
        background: var(--nav-bg);
        backdrop-filter: blur(18px) saturate(180%);
        -webkit-backdrop-filter: blur(18px) saturate(180%);
        border-bottom: 1px solid var(--border);
        opacity: 0;
        transform: translateY(-10px);
        pointer-events: none;
        transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
    }
    .nav-links.is-open { opacity: 1; transform: none; pointer-events: auto; }
    .nav-links a { padding: 12px 6px; font-size: 1rem; border-radius: var(--r-sm); }
    .nav-links a:hover { background: var(--surface-hover); }
    .split { grid-template-columns: 1fr; gap: var(--sp-5); }
    .grid-3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .bento > .card,
    .bento > .card.span-3,
    .bento > .card.span-4,
    .bento > .card.span-6 { grid-column: span 6; }
    .stats { grid-template-columns: 1fr 1fr; gap: var(--sp-5) var(--sp-3); }
    .footer-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
    .pstep { grid-template-columns: 44px 1fr; gap: var(--sp-4); padding-block: var(--sp-4); }
    .pstep::before { width: 44px; height: 44px; font-size: 0.82rem; }
    .pstep::after { left: 22px; top: 62px; }
    .lang select { width: 56px; padding-left: 30px; padding-right: 24px; font-size: 0; }
    .lang select option { font-size: 1rem; }
    .terminal-body { font-size: 0.78rem; padding: 16px 16px 20px; min-height: 230px; }
    .install-line { font-size: 0.78rem; padding-left: 14px; }
    .tab { flex: 1 1 100%; }
}

@media (max-width: 420px) {
    .container, .nav-inner { padding-inline: var(--sp-4); }
    .brand-sub { display: none; }
}

/* --------------------------------------------------------------------------
   21. Motion / print
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
    html { scroll-behavior: auto; }
    .reveal, .reveal-stagger > * { opacity: 1; transform: none; }
}

@media print {
    .nav, .backdrop, .cta, .socials { display: none; }
    body { background: #fff; color: #000; }
}