/* CozyCode – Cozy coffee theme */
:root {
    /* Palette (espresso / mocha / crema) */
    --bg: #1a1310;
    --surface: #241a15;
    --surface-2: #2d221b;
    --surface-3: #372a22;

    --text: #f1e8df;
    --muted: #d1bdab;
    --muted-2: #b29580;

    --border: rgba(244, 238, 231, .10);

    --brand: #c07a3e;
    --brand-2: #e2b26b;
    --accent: #7a4a2c;

    --shadow: 0 14px 38px rgba(0, 0, 0, .38);
    --shadow-soft: 0 10px 22px rgba(0, 0, 0, .22);

    --radius: 18px;
    --radius-sm: 12px;

    --container: 1120px;

    --font: ui-sans-serif,
        system-ui,
        -apple-system,
        Segoe UI,
        Roboto,
        Helvetica,
        Arial,
        "Apple Color Emoji",
        "Segoe UI Emoji";
    --mono: ui-monospace,
        SFMono-Regular,
        Menlo,
        Monaco,
        Consolas,
        "Liberation Mono",
        "Courier New",
        monospace;

    --focus: 0 0 0 4px rgba(192, 122, 62, .30);
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #fbf3ea;
        /* oat milk */
        --surface: #fff8f0;
        /* porcelain */
        --surface-2: #f5e6d7;
        /* foam */
        --surface-3: #efddcc;
        /* warm card */
        --text: #2a1b12;
        /* espresso ink */
        --muted: #6a4b3a;
        /* cocoa */
        --muted-2: #846251;
        /* toast */
        --border: rgba(42, 27, 18, .14);

        --brand: #b4632a;
        /* cinnamon */
        --brand-2: #d7a45c;
        /* crema */
        --accent: #6b3f24;

        --shadow: 0 16px 44px rgba(42, 27, 18, .14);
        --shadow-soft: 0 10px 24px rgba(42, 27, 18, .10);

        --focus: 0 0 0 4px rgba(180, 99, 42, .22);
    }
}

/* Base */
* {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    line-height: 1.65;

    /* Cozy “café light” */
    background:
        radial-gradient(900px 520px at 12% -10%, rgba(192, 122, 62, .23), transparent 62%),
        radial-gradient(900px 560px at 88% 0%, rgba(226, 178, 107, .13), transparent 60%),
        radial-gradient(900px 620px at 55% 120%, rgba(122, 74, 44, .10), transparent 62%),
        linear-gradient(180deg, rgba(0, 0, 0, .05), transparent 25%),
        var(--bg);
}

/* Subtle “paper grain” */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: .06;
    background-image:
        repeating-linear-gradient(0deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .09) 1px, transparent 1px, transparent 6px),
        repeating-linear-gradient(90deg, rgba(0, 0, 0, .10), rgba(0, 0, 0, .10) 1px, transparent 1px, transparent 9px);
    mix-blend-mode: overlay;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--brand-2);
    text-decoration-thickness: .09em;
    text-underline-offset: .18em;
}

a:hover {
    color: color-mix(in srgb, var(--brand-2) 80%, var(--text));
}

:focus-visible {
    outline: none;
    box-shadow: var(--focus);
    border-radius: 10px;
}

.container {
    width: min(var(--container), calc(100% - 2rem));
    margin-inline: auto;
}

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

/* Skip link */
.skip-link {
    position: absolute;
    left: .9rem;
    top: .9rem;
    transform: translateY(-160%);
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    padding: .65rem .85rem;
    border-radius: 999px;
    z-index: 1000;
    box-shadow: var(--shadow-soft);
}

.skip-link:focus {
    transform: translateY(0);
}

/* Nav */
.nav {
    position: sticky;
    top: 0;
    z-index: 40;

    background: color-mix(in srgb, var(--bg) 78%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .9rem;
    padding: .9rem 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    font-weight: 820;
    letter-spacing: .2px;
    text-decoration: none;
    color: var(--text);
}

.brand img {
    display: block;
    height: 36px;
    width: auto;
    border-radius: 12px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, .20);
}

.brand span {
    font-size: 1.05rem;
}

/* Menu */
.menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: .25rem;
    margin: 0;
    padding: 0;
}

.menu a {
    display: inline-flex;
    align-items: center;
    padding: .58rem .82rem;
    border-radius: 999px;
    text-decoration: none;
    color: var(--muted);
    border: 1px solid transparent;
    transition: background .14s ease, transform .08s ease, color .14s ease;
}

.menu a:hover {
    color: var(--text);
    background: color-mix(in srgb, var(--surface) 70%, transparent);
    border-color: color-mix(in srgb, var(--border) 80%, transparent);
}

.menu a:active {
    transform: translateY(1px);
}

.menu a.is-active {
    color: var(--text);
    background:
        linear-gradient(180deg,
            color-mix(in srgb, var(--surface-3) 92%, transparent),
            color-mix(in srgb, var(--surface-2) 80%, transparent));
    border-color: color-mix(in srgb, var(--border) 85%, transparent);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04);
}

.lang-switch {
    margin-left: .35rem;
    display: flex;
    align-items: center;
}

#lang-switch {
    font: inherit;
    color: var(--text);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: .5rem .7rem;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04);
}

#lang-switch:focus-visible {
    box-shadow: var(--focus);
}

/* Mobile nav */
.nav-toggle {
    display: none;
    background: color-mix(in srgb, var(--surface) 82%, transparent);
    border: 1px solid var(--border);
    border-radius: 999px;
    width: 46px;
    height: 42px;
    padding: 0;
    align-items: center;
    justify-content: center;
    gap: 4px;
    box-shadow: var(--shadow-soft);
}

.nav-toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text);
    opacity: .9;
    border-radius: 2px;
}

@media (max-width: 860px) {
    .nav-toggle {
        display: inline-flex;
    }

    .menu {
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;

        display: none;
        flex-direction: column;
        align-items: stretch;

        padding: .75rem;
        gap: .35rem;

        background: color-mix(in srgb, var(--bg) 92%, transparent);
        border-bottom: 1px solid var(--border);

        /* cozy “drawer” */
        box-shadow: var(--shadow-soft);
    }

    .menu.is-open {
        display: flex;
    }

    .menu li {
        width: 100%;
    }

    .menu a {
        width: 100%;
        justify-content: flex-start;
        padding: .75rem .9rem;
        border-radius: 14px;
    }

    .lang-switch {
        width: 100%;
        margin-left: 0;
        padding-top: .2rem;
    }

    #lang-switch {
        width: 100%;
        border-radius: 14px;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;

    padding: .72rem 1.05rem;
    border-radius: 999px;

    border: 1px solid color-mix(in srgb, var(--brand) 55%, var(--border));
    background:
        linear-gradient(180deg,
            color-mix(in srgb, var(--brand-2) 28%, var(--brand) 72%),
            var(--brand));
    color: #1b120d;
    font-weight: 800;
    letter-spacing: .01em;
    text-decoration: none;

    box-shadow:
        0 14px 28px rgba(192, 122, 62, .22),
        inset 0 1px 0 rgba(255, 255, 255, .18);
    transition: transform .08s ease, filter .14s ease, box-shadow .14s ease;
}

.btn:hover {
    filter: brightness(1.03);
    box-shadow:
        0 18px 34px rgba(192, 122, 62, .25),
        inset 0 1px 0 rgba(255, 255, 255, .18);
}

.btn:active {
    transform: translateY(1px);
}

.btn-secondary {
    background:
        linear-gradient(180deg,
            color-mix(in srgb, var(--surface-3) 92%, transparent),
            color-mix(in srgb, var(--surface) 85%, transparent));
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft), inset 0 1px 0 rgba(255, 255, 255, .05);
}

.btn-secondary:hover {
    filter: brightness(1.02);
}

.btn-small {
    padding: .5rem .75rem;
    font-weight: 750;
    font-size: .95rem;
}

.btn-link-arrow {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    padding-inline: 0;
    color: var(--brand-2);
}

.btn-link-arrow:hover {
    text-decoration: underline;
}

.btn-link-arrow::after {
    content: "→";
    margin-left: .35rem;
    font-weight: 900;
}

/* Notice */
.notice {
    border-bottom: 1px solid var(--border);
    background:
        linear-gradient(180deg,
            color-mix(in srgb, var(--surface) 70%, transparent),
            color-mix(in srgb, var(--surface-2) 58%, transparent));
}

.notice .container {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: .7rem 0;
}

.notice-text {
    color: var(--muted);
    font-size: .95rem;
}

/* Hero */
.hero {
    padding: 3.1rem 0 2rem;
}

.eyebrow {
    margin: 0 0 .65rem;
    color: var(--brand-2);
    font-weight: 860;
    letter-spacing: .08em;
    text-transform: uppercase;
    font-size: .82rem;
}

.hero-title {
    margin: 0 0 .7rem;
    font-size: clamp(2.15rem, 4vw, 3.25rem);
    line-height: 1.08;
    letter-spacing: -0.02em;
}

.lead {
    margin: 0 0 1.2rem;
    color: var(--muted);
    font-size: 1.12rem;
    max-width: 70ch;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: .8rem;
    margin: 1.15rem 0 1.35rem;
}

.hero-bullets {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--muted);
}

.hero-bullets li {
    margin: .35rem 0;
}

/* Sections */
.section {
    padding: 2.6rem 0;
}

.section-alt {
    background:
        radial-gradient(900px 420px at 20% 0%, rgba(226, 178, 107, .08), transparent 65%),
        linear-gradient(180deg,
            color-mix(in srgb, var(--surface) 62%, transparent),
            color-mix(in srgb, var(--surface-2) 60%, transparent));
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-head {
    display: grid;
    gap: .45rem;
    margin-bottom: 1.2rem;
}

.section-head h2 {
    margin: 0;
    font-size: 1.6rem;
    letter-spacing: -0.012em;
}

/* Page */
.page {
    padding: 2.2rem 0 3rem;
}

.page-head {
    padding: 1.35rem 1.35rem;
    background:
        radial-gradient(900px 420px at 20% 0%, rgba(226, 178, 107, .10), transparent 70%),
        linear-gradient(180deg,
            color-mix(in srgb, var(--surface-3) 85%, transparent),
            color-mix(in srgb, var(--surface-2) 70%, transparent));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

.page-head h1 {
    margin: 0 0 .4rem;
    line-height: 1.15;
    letter-spacing: -0.016em;
}

/* Prose (markdown output) */
.prose {
    margin-top: 1.5rem;
    max-width: 76ch;
}

.prose :where(h1, h2, h3) {
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.prose h2 {
    margin-top: 1.9rem;
}

.prose h3 {
    margin-top: 1.45rem;
}

.prose p {
    margin: .9rem 0;
}

.prose ul,
.prose ol {
    padding-left: 1.25rem;
}

.prose li {
    margin: .35rem 0;
}

.prose a {
    color: var(--brand-2);
}

.prose :where(code) {
    font-family: var(--mono);
    font-size: .95em;
    background: color-mix(in srgb, var(--surface-3) 86%, transparent);
    border: 1px solid color-mix(in srgb, var(--border) 90%, transparent);
    border-radius: 10px;
    padding: .14rem .38rem;
    color: color-mix(in srgb, var(--text) 92%, var(--brand-2));
}

.prose pre {
    background:
        radial-gradient(900px 320px at 25% 0%, rgba(226, 178, 107, .08), transparent 70%),
        color-mix(in srgb, var(--surface-3) 88%, transparent);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    overflow: auto;
    box-shadow: var(--shadow-soft);
}

.prose pre code {
    background: transparent;
    border: 0;
    padding: 0;
    font-size: .95rem;
    color: var(--text);
}

.prose blockquote {
    margin: 1.05rem 0;
    padding: .85rem 1rem;
    border-left: 4px solid color-mix(in srgb, var(--brand) 75%, var(--border));
    background: color-mix(in srgb, var(--surface) 72%, transparent);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--muted);
}

.prose hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 1.7rem 0;
}

.prose table {
    border-collapse: collapse;
    width: 100%;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: block;
    background: color-mix(in srgb, var(--surface) 70%, transparent);
}

.prose thead th {
    text-align: left;
    font-weight: 850;
    background: color-mix(in srgb, var(--surface-3) 90%, transparent);
}

.prose th,
.prose td {
    padding: .75rem .85rem;
    border-bottom: 1px solid var(--border);
}

.prose tr:last-child td {
    border-bottom: 0;
}

/* Grid + cards */
.grid {
    display: grid;
    gap: 1.05rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 980px) {
    .grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

.card {
    position: relative;
    background:
        radial-gradient(900px 420px at 10% 0%, rgba(226, 178, 107, .10), transparent 62%),
        linear-gradient(180deg,
            color-mix(in srgb, var(--surface-3) 90%, transparent),
            color-mix(in srgb, var(--surface-2) 72%, transparent));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.1rem;

    box-shadow: var(--shadow-soft);
    transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}

.card::after {
    /* a subtle “warm edge glow” */
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
}

.card:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--brand) 30%, var(--border));
    box-shadow: 0 18px 40px rgba(0, 0, 0, .32);
}

.card-title {
    margin: 0 0 .4rem;
    font-size: 1.12rem;
    letter-spacing: -0.01em;
}

.card-title a {
    color: var(--text);
    text-decoration: none;
}

.card-title a:hover {
    text-decoration: underline;
}

.card-summary {
    margin: 0 0 .8rem;
    color: var(--muted);
}

/* Divider */
.divider {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 1.7rem 0;
}

/* Callout */
.callout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;

    padding: 1.35rem 1.35rem;
    border-radius: var(--radius);

    background:
        radial-gradient(900px 420px at 20% 0%, rgba(226, 178, 107, .14), transparent 65%),
        linear-gradient(135deg,
            color-mix(in srgb, var(--surface-3) 92%, transparent),
            color-mix(in srgb, var(--surface-2) 70%, transparent));
    border: 1px solid color-mix(in srgb, var(--border) 90%, transparent);
    box-shadow: var(--shadow);

    position: relative;
    overflow: hidden;
}

.callout::before {
    /* “steam” highlight */
    content: "";
    position: absolute;
    width: 520px;
    height: 220px;
    left: -140px;
    top: -140px;
    background: radial-gradient(circle at 50% 50%, rgba(244, 238, 231, .10), transparent 70%);
    transform: rotate(-18deg);
    pointer-events: none;
}

.callout h2 {
    margin: 0 0 .35rem;
    font-size: 1.45rem;
    letter-spacing: -0.012em;
}

.callout p {
    margin: 0;
    color: var(--muted);
}

.callout-actions {
    flex: 0 0 auto;
}

@media (max-width: 720px) {
    .callout {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 2.3rem 0 1.5rem;

    background:
        radial-gradient(900px 420px at 80% 0%, rgba(226, 178, 107, .08), transparent 65%),
        linear-gradient(180deg,
            color-mix(in srgb, var(--bg) 88%, transparent),
            var(--bg));
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 1.1rem;
    align-items: start;
}

@media (max-width: 860px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: .65rem 0 0;
    display: grid;
    gap: .4rem;
}

.footer-links a {
    color: var(--muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--text);
    text-decoration: underline;
}

.footer-bottom {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--muted-2);
    font-size: .95rem;
}

/* Small details */
::selection {
    background: rgba(192, 122, 62, .28);
    color: var(--text);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .card,
    .btn,
    .menu a {
        transition: none !important;
    }
}