/* ==========================================================================
   Nephroctor – shared stylesheet (index.html + /legal/*.html)
   Self-hosted Inter (SIL OFL 1.1) – no third-party font CDN, see /legal/cookies.html
   ========================================================================== */

/* --- Inter, variable, self-hosted ---------------------------------------- */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400 700;
    font-display: swap;
    src: url('fonts/inter-latin.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400 700;
    font-display: swap;
    src: url('fonts/inter-latin-ext.woff2') format('woff2');
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400 700;
    font-display: swap;
    src: url('fonts/inter-greek.woff2') format('woff2');
    unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400 700;
    font-display: swap;
    src: url('fonts/inter-cyrillic.woff2') format('woff2');
    unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}

/* --- Design tokens -------------------------------------------------------- */
:root {
    --color-primary: #0a2540;
    --color-accent: #00b4d8;
    --color-accent-dark: #0077b6;
    /* Filled controls: --color-accent-strong pairs with --color-on-accent
       and is contrast-checked in both themes (see .audit.md, Beh #7). */
    --color-accent-strong: #0077b6;
    --color-on-accent: #ffffff;
    /* Icon plate gradient. The light stop is #0096b5 rather than the brand
       #00b4d8 so the white glyph clears WCAG 1.4.11 (3.48:1 vs 2.46:1). */
    --color-icon-from: #0096b5;
    --color-icon-to: #0077b6;
    --color-bg: #f8fafc;
    --color-card: #ffffff;
    --color-text: #1e293b;
    --color-muted: #475569;
    --color-border: #e2e8f0;
    --radius: 16px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

:root[data-theme="dark"] {
    --color-primary: #e2e8f0;
    --color-accent: #22d3ee;
    --color-accent-dark: #67e8f9;
    --color-accent-strong: #22d3ee;
    --color-on-accent: #0f172a;
    --color-icon-from: #22d3ee;
    --color-icon-to: #67e8f9;
    --color-bg: #0f172a;
    --color-card: #1e293b;
    --color-text: #f1f5f9;
    --color-muted: #94a3b8;
    --color-border: #334155;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-primary: #e2e8f0;
        --color-accent: #22d3ee;
        --color-accent-dark: #67e8f9;
        --color-accent-strong: #22d3ee;
        --color-on-accent: #0f172a;
        --color-icon-from: #22d3ee;
        --color-icon-to: #67e8f9;
        --color-bg: #0f172a;
        --color-card: #1e293b;
        --color-text: #f1f5f9;
        --color-muted: #94a3b8;
        --color-border: #334155;
        --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
    }
}

/* --- Base ----------------------------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-text-size-adjust: 100%;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    left: 0.5rem;
    top: -3rem;
    z-index: 200;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    background: var(--color-accent-strong);
    color: var(--color-on-accent);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0.5rem;
}

/* --- Header / logo -------------------------------------------------------- */
.header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.header img {
    max-width: 500px;
    width: 100%;
    height: auto;
    display: block;
}

/* The logo master has an opaque near-white background, so the plate stays
   white in both themes – a tinted plate would show a visible seam. */
.logo-wrapper {
    display: inline-block;
    background: #ffffff;
    padding: 1.5rem 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.header .subtitle {
    font-size: 0.95rem;
    color: var(--color-muted);
}

/* --- Cards ---------------------------------------------------------------- */
.card,
.content-card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.info-item .icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-icon-from), var(--color-icon-to));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-item .icon svg {
    width: 18px;
    height: 18px;
    fill: var(--color-on-accent);
}

.info-item .label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    font-weight: 600;
}

.info-item .value {
    font-size: 0.95rem;
    color: var(--color-text);
    font-weight: 500;
}

.info-item .value a {
    color: var(--color-accent-dark);
    text-decoration: none;
}

.info-item .value a:hover {
    text-decoration: underline;
}

/* --- Language selector ---------------------------------------------------- */
.lang-section {
    margin-bottom: 2rem;
}

.lang-section h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-primary);
}

.lang-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.5rem 0.85rem;
    min-height: 44px;
    border: 1.5px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-card);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    display: inline-flex;
    align-items: center;
}

.lang-btn:hover,
.lang-btn[aria-pressed="true"] {
    border-color: var(--color-accent-strong);
    background: var(--color-accent-strong);
    color: var(--color-on-accent);
}

.lang-btn:focus-visible,
.theme-toggle:focus-visible,
.skip-link:focus-visible,
a:focus-visible {
    outline: 3px solid var(--color-accent-dark);
    outline-offset: 2px;
}

/* --- Content -------------------------------------------------------------- */
.content-card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.content-card p {
    color: var(--color-muted);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* --- Footer --------------------------------------------------------------- */
.footer {
    text-align: center;
    padding: 1.5rem 0;
    color: var(--color-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--color-border);
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35rem 1rem;
    margin-bottom: 0.85rem;
}

.footer-legal a {
    color: var(--color-accent-dark);
    text-decoration: none;
    padding: 0.25rem 0;
}

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

/* --- Theme toggle --------------------------------------------------------- */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: 44px;
    height: 44px;
    border: 1.5px solid var(--color-border);
    border-radius: 50%;
    background: var(--color-card);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    box-shadow: var(--shadow);
    z-index: 100;
}

.theme-toggle:hover {
    border-color: var(--color-accent-strong);
    background: var(--color-accent-strong);
    color: var(--color-on-accent);
}

.theme-toggle svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

/* --- Legal documents ------------------------------------------------------ */
.doc-header {
    margin-bottom: 1.5rem;
}

.doc-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.35rem;
}

.doc-meta {
    font-size: 0.8rem;
    color: var(--color-muted);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 44px;
    color: var(--color-accent-dark);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

.doc-lang {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.doc-lang button {
    padding: 0.4rem 0.9rem;
    min-height: 44px;
    border: 1.5px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-card);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
}

.doc-lang button[aria-pressed="true"] {
    border-color: var(--color-accent-strong);
    background: var(--color-accent-strong);
    color: var(--color-on-accent);
}

.doc-lang button:focus-visible {
    outline: 3px solid var(--color-accent-dark);
    outline-offset: 2px;
}

.prose {
    font-size: 0.92rem;
    line-height: 1.75;
    color: var(--color-text);
}

.prose h2 {
    font-size: 1.05rem;
    color: var(--color-primary);
    margin: 1.75rem 0 0.6rem;
}

.prose h2:first-child {
    margin-top: 0;
}

.prose h3 {
    font-size: 0.95rem;
    color: var(--color-primary);
    margin: 1.25rem 0 0.4rem;
}

.prose p,
.prose ul,
.prose ol,
.prose table {
    margin-bottom: 0.85rem;
}

.prose ul,
.prose ol {
    padding-left: 1.35rem;
}

.prose li {
    margin-bottom: 0.3rem;
}

.prose a {
    color: var(--color-accent-dark);
}

.prose dt {
    font-weight: 600;
    margin-top: 0.6rem;
}

.table-scroll {
    overflow-x: auto;
    margin-bottom: 0.85rem;
}

.prose table {
    border-collapse: collapse;
    width: 100%;
    min-width: 30rem;
    font-size: 0.85rem;
}

.prose th,
.prose td {
    border: 1px solid var(--color-border);
    padding: 0.5rem 0.65rem;
    text-align: left;
    vertical-align: top;
}

.prose th {
    background: var(--color-bg);
    font-weight: 600;
}

.callout {
    border-left: 4px solid var(--color-accent-strong);
    background: var(--color-bg);
    border-radius: 0 8px 8px 0;
    padding: 0.85rem 1rem;
    margin: 1rem 0;
}

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

.todo {
    border-left-color: #b45309;
}

:root[data-theme="dark"] .todo {
    border-left-color: #fbbf24;
}

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 600px) {
    .container {
        padding: 1.5rem 1rem;
    }

    .card,
    .content-card {
        padding: 1.5rem;
    }

    .header img {
        max-width: 320px;
    }

    .logo-wrapper {
        padding: 1rem 1.25rem;
    }

    .doc-header h1 {
        font-size: 1.3rem;
    }
}

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

/* --- Print ---------------------------------------------------------------- */
@media print {
    .theme-toggle,
    .doc-lang,
    .lang-section,
    .skip-link,
    .back-link {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .card,
    .content-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}