/* ===================== TOKENS ===================== */
:root {
    --bg: #fff;
    --fg: #0f172a;
    --muted: #64748b;
    --card: #f8fafc;
    --border: #e2e8f0;
    --accent: #2563eb;
    --code: #111827;
    --btnbg: #111827;
    --btnfg: #fff;
    --shadow: 0 2px 10px rgba(0, 0, 0, .05);
    --wrap: 1040px;
    --radius: 12px;
    --focus: #94a3b8;
    --codebg: #0b1020;
    --codefg: #e6edf3;
    --font-family: "Inter", "SF Pro Text", system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Arial, "Noto Sans";
    --lh: 1.7;
    --code-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, Monaco, monospace;
    --tbH: 56px;
}

:root[data-theme="dark"] {
    --bg: #0b1020;
    --fg: #e8eef6;
    --muted: #9aa7bd;
    --card: #0f152a;
    --border: #1f2a44;
    --accent: #60a5fa;
    --code: #e6edf3;
    --btnbg: #e6edf3;
    --btnfg: #0b1020;
    --shadow: 0 2px 10px rgba(0, 0, 0, .3);
    --codebg: #0b1325;
    --codefg: #e6edf3;
}

/* Respect du système si data-theme non fixé */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --bg: #0b1020;
        --fg: #e8eef6;
        --muted: #9aa7bd;
        --card: #0f152a;
        --border: #1f2a44;
        --accent: #60a5fa;
        --code: #e6edf3;
        --btnbg: #e6edf3;
        --btnfg: #0b1020;
        --shadow: 0 2px 10px rgba(0, 0, 0, .3);
        --codebg: #0b1325;
        --codefg: #e6edf3;
    }
}

/* ===================== RESETS ===================== */
* {
    box-sizing: border-box
}

html {
    font-size: 16px
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 1rem/var(--lh) var(--font-family);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===================== LIENS (corrigés) ===================== */
a {
    color: var(--accent);
    text-decoration: none;
    text-underline-offset: .14em;
    text-decoration-thickness: .08em;
    text-decoration-skip-ink: auto;
    background-image: linear-gradient(currentColor, currentColor);
    background-size: 0 1px;
    background-position: 0 100%;
    background-repeat: no-repeat;
    transition: background-size .18s ease, color .12s ease, outline-color .12s ease;
}

a:hover {
    background-size: 100% 1px;
}

a:active {
    opacity: .9;
}

a:visited {
    color: color-mix(in srgb, var(--accent) 80%, var(--fg));
}

/* Focus accessible */
a:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent) 55%, var(--focus));
    outline-offset: 2px;
    border-radius: 4px;
}

/* Lien contenant du code inline */
a>code {
    color: inherit;
    border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
}

/* Boutons-lien (si .btn est un <a>) */
a.btn {
    background: var(--btnbg);
    color: var(--btnfg);
    text-decoration: none;
    background-image: none;
}

a.btn:hover {
    filter: saturate(1.02);
}

/* Icône liens externes */
a[target="_blank"],
a[href^="http://"],
a[href^="https://"] {
    position: relative;
    padding-right: 1.05em;
}

a[target="_blank"]::after,
a[href^="http://"]::after,
a[href^="https://"]::after {
    content: "";
    position: absolute;
    right: .1em;
    top: .15em;
    width: .85em;
    height: .85em;
    background: currentColor;
    -webkit-mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M10.5 1a.5.5 0 0 0 0 1h2.793L7.146 8.146a.5.5 0 1 0 .708.708L14 2.707V5.5a.5.5 0 0 0 1 0v-4A.5.5 0 0 0 14.5 1h-4z'/%3E%3Cpath d='M3.5 3A1.5 1.5 0 0 0 2 4.5v8A1.5 1.5 0 0 0 3.5 14h8a1.5 1.5 0 0 0 1.5-1.5V9a.5.5 0 0 0-1 0v3.5a.5.5 0 0 1-.5.5h-8a.5.5 0 0 1-.5-.5v-8a.5.5 0 0 1 .5-.5H7a.5.5 0 0 0 0-1H3.5z'/%3E%3C/svg%3E") center/contain no-repeat;
    mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M10.5 1a.5.5 0 0 0 0 1h2.793L7.146 8.146a.5.5 0 1 0 .708.708L14 2.707V5.5a.5.5 0 0 0 1 0v-4A.5.5 0 0 0 14.5 1h-4z'/%3E%3Cpath d='M3.5 3A1.5 1.5 0 0 0 2 4.5v8A1.5 1.5 0 0 0 3.5 14h8a1.5 1.5 0 0 0 1.5-1.5V9a.5.5 0 0 0-1 0v3.5a.5.5 0 0 1-.5.5h-8a.5.5 0 0 1-.5-.5v-8a.5.5 0 0 1 .5-.5H7a.5.5 0 0 0 0-1H3.5z'/%3E%3C/svg%3E") center/contain no-repeat;
    opacity: .75;
}

:root[data-theme="dark"] a[target="_blank"]::after,
:root[data-theme="dark"] a[href^="http://"]::after,
:root[data-theme="dark"] a[href^="https://"]::after {
    opacity: .9;
}

/* Liens du sommaire */
.toc a {
    display: inline-block;
    padding: .1rem .2rem;
    border-radius: .35rem;
    background-image: linear-gradient(color-mix(in srgb, var(--accent) 55%, transparent), color-mix(in srgb, var(--accent) 55%, transparent));
    background-position: 0 100%;
    background-size: 0 .08em;
}

.toc a:hover {
    background-size: 100% .08em;
}

.toc a:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent) 45%, var(--focus));
    outline-offset: 1px;
}

/* Liens dans suggestions & méta */
.sugg-item a {
    color: inherit;
    background-image: none;
}

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

.mini a {
    color: var(--muted);
    background-image: none;
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--muted) 50%, transparent);
}

.mini a:hover {
    color: var(--fg);
    text-decoration-color: currentColor;
}

/* ===================== LAYOUT & COMPOSANTS ===================== */
.wrap {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 16px
}

.skip {
    position: absolute;
    left: -9999px
}

.skip:focus {
    left: 16px;
    top: 12px;
    background: var(--card);
    padding: .5rem .75rem;
    border: 1px solid var(--border);
    border-radius: .5rem;
}

.toolbar {
    position: sticky;
    top: 0;
    z-index: 60;
    background: var(--bg);
    border-bottom: 1px solid var(--border)
}

.toolbar .wrap {
    display: flex;
    align-items: center;
    gap: .5rem;
    min-height: var(--tbH);
    padding: 8px 16px
}

.brand {
    font-weight: 700;
    font-size: 1rem;
    white-space: nowrap
}

.srch {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: .5rem;
    position: relative;
    flex: 1;
    min-width: 200px
}

.srch input {
    width: 100%;
    padding: .6rem .75rem;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--fg);
    border-radius: .65rem;
    outline: none;
    font-size: 1rem;
    min-height: 42px;
}

.srch input:focus {
    box-shadow: 0 0 0 3px var(--focus)
}

.mini {
    font-size: .875rem;
    color: var(--muted);
    white-space: nowrap
}

.split {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 .25rem
}

.btn {
    border: 1px solid var(--border);
    background: var(--btnbg);
    color: var(--btnfg);
    padding: .5rem .7rem;
    border-radius: .5rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    font-size: 1rem;
}

.btn-ghost {
    background: transparent;
    color: var(--fg)
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus)
}

.btn-invert {
    background: var(--fg);
    color: var(--bg)
}

.sugg {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 8px);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: .85rem;
    box-shadow: var(--shadow);
    overflow: hidden;
    max-height: 70vh;
    overflow-y: auto;
}

.sugg[hidden] {
    display: none
}

.group-h {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    margin: .35rem .5rem;
    padding: .35rem .6rem;
    font-weight: 700;
    font-size: .85rem;
    color: var(--muted);
}

.filters {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap
}

.pill {
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--card) 85%, transparent);
    padding: .3rem .6rem;
    border-radius: 999px;
    font-size: .85rem;
    cursor: pointer;
    white-space: nowrap;
}

.pill[aria-pressed="true"] {
    background: color-mix(in srgb, var(--accent) 18%, transparent);
    color: var(--fg)
}

.sugg-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    text-align: left;
    gap: .75rem;
    padding: .75rem .9rem;
    border: 0;
    background: transparent;
    color: var(--fg);
    cursor: pointer;
    font-size: .95rem;
}

.sugg-item:hover,
.sugg-item[aria-selected="true"] {
    background: color-mix(in srgb, var(--accent) 12%, transparent)
}

.sugg-left {
    min-width: 0
}

.sugg-left strong {
    display: block;
    font-weight: 700
}

.sugg-left small {
    display: block;
    color: var(--muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap
}

.sugg-right {
    display: flex;
    align-items: center;
    gap: .4rem;
    flex-wrap: wrap;
    justify-content: flex-end;
    margin-left: .5rem
}

.tag {
    border: 1px solid var(--border);
    padding: .2rem .5rem;
    border-radius: 999px;
    font-size: .75rem;
    white-space: nowrap
}

.tag.emph {
    border-color: var(--accent)
}

header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(99, 102, 241, .08), transparent);
}

.container {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 16px
}

.intro {
    display: flex;
    gap: 18px;
    align-items: flex-end;
    flex-wrap: wrap
}

h1 {
    margin: 0;
    font-size: clamp(1.4rem, 2.8vw, 2.25rem);
    letter-spacing: .2px
}

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

main {
    padding: 24px 0
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px
}

.index,
.toc {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    margin: 20px 0 8px
}

.index ol,
.toc ul {
    margin: .25rem 0 .25rem 1.25rem
}

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

h2 {
    margin: 0 0 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    font-size: 1.25rem;
}

h3 {
    margin: 18px 0 8px;
    font-size: 1.1rem
}

code {
    font-family: var(--code-mono);
    background: color-mix(in srgb, var(--card) 85%, transparent);
    color: var(--code);
    padding: .15em .35em;
    border-radius: 6px;
    border: 1px solid var(--border);
}

pre {
    margin: .75rem 0;
    padding: 14px 16px;
    border-radius: 12px;
    background: var(--codebg);
    color: var(--codefg);
    border: 1px solid var(--border);
    overflow: auto;
}

pre code {
    background: transparent;
    border: 0;
    padding: 0;
    color: var(--codefg)
}

hr {
    border: 0;
    border-top: 1px dashed var(--border);
    margin: 16px 0
}

mark[data-hl] {
    background: #fde68a;
    color: #111827;
    padding: 0 .15em;
    border-radius: .2em
}

mark[data-cur] {
    background: #f59e0b;
    color: #111827
}

.callout {
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    border-radius: 10px;
    background: color-mix(in srgb, var(--card) 92%, transparent);
    padding: 12px 14px;
    margin: 12px 0;
}

.callout.ok {
    border-left-color: #16a34a
}

.callout.info {
    border-left-color: #2563eb
}

.callout.warn {
    border-left-color: #f59e0b
}

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

.steps {
    background: var(--card);
    border: 1px dashed var(--border);
    border-radius: 10px;
    padding: 10px 12px
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px
}

@media (max-width:860px) {
    .grid-2 {
        grid-template-columns: 1fr
    }
}

.fab {
    position: fixed;
    right: clamp(16px, 2vw, 24px);
    bottom: calc(max(16px, env(safe-area-inset-bottom)) + 8px);
    z-index: 70;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .65rem .9rem;
    border-radius: 9999px;
    border: 1px solid var(--border);
    box-shadow: 0 6px 18px rgba(0, 0, 0, .22);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
}

.fab[hidden] {
    display: none
}

/* ===================== RESPONSIVE ===================== */
@media (max-width:920px) {
    .wrap {
        padding: 0 12px
    }

    .toolbar .wrap {
        flex-wrap: wrap;
        gap: .5rem
    }

    .srch {
        order: 3;
        width: 100%;
        margin: 6px 0 2px
    }

    .split,
    .mini {
        display: none
    }
}

@media (max-width:768px) {
    .sugg {
        position: fixed;
        left: 12px;
        right: 12px;
        top: calc(var(--tbH, 56px) + 8px);
        max-height: calc(100vh - var(--tbH, 56px) - 24px);
        border-radius: 14px;
        z-index: 80;
    }

    .btn {
        padding: .5rem .6rem
    }

    .pill {
        padding: .35rem .6rem
    }

    .sugg-item {
        padding: 1rem
    }
}

@media (max-width:420px) {
    h1 {
        font-size: 1.25rem
    }

    .brand {
        max-width: 45vw;
        overflow: hidden;
        text-overflow: ellipsis
    }

    .btn {
        font-size: .95rem
    }
}

/* ===================== PRINT ===================== */
@media print {

    .fab,
    .sugg {
        display: none
    }
}