@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;700&family=Poppins:wght@300;400;600&display=swap');

/* ══════════════════════════════════════
   VARIABLES — MODE SOMBRE (défaut)
══════════════════════════════════════ */
:root {
    --bg-dark: #0a1628;
    --card-bg: rgba(22, 35, 58, 0.92);
    --accent-gold: #f5a623;
    --accent-gold-glow: rgba(245, 166, 35, 0.25);
    --accent-blue: #38bdf8;
    --accent-blue-glow: rgba(56, 189, 248, 0.2);
    --text-white: #eef2f7;
    --text-muted: #94a3b8;
    --border-subtle: rgba(255, 255, 255, 0.07);
    --nav-bg: rgba(10, 22, 40, 0.97);
    --body-bg: #0a1628;
    --input-bg: rgba(255,255,255,0.04);
    --input-border: rgba(255,255,255,0.1);
    --select-bg: #0a1628;
    --info-block-bg: rgba(255, 255, 255, 0.025);
    --anecdote-bg: rgba(245, 166, 35, 0.07);
    --anecdote-border: rgba(245, 166, 35, 0.12);
    --response-bg: rgba(56, 189, 248, 0.06);
    --arch-bg: rgba(245,166,35,0.06);
    --arch-border: rgba(245,166,35,0.12);
    --attack-bg: rgba(255,255,255,0.025);
    --attack-border: rgba(255,255,255,0.07);
    --alphabet-bg: rgba(0,0,0,0.3);
    --alphabet-border: rgba(56,189,248,0.15);
    --timeline-bg: rgba(255,255,255,0.03);
    --timeline-border: rgba(255,255,255,0.07);
    --card-text: #b0c4d8;
    --confirm-bg: rgba(56,189,248,0.08);
    --confirm-border: rgba(56,189,248,0.25);
    --scroll-btn-bg: rgba(22, 35, 58, 0.95);
    --scroll-btn-border: rgba(56,189,248,0.3);
    --quiz-btn-bg: rgba(255,255,255,0.04);
    --quiz-btn-border: rgba(255,255,255,0.12);
    --quiz-btn-hover: rgba(56,189,248,0.1);
    --quiz-correct: rgba(34,197,94,0.15);
    --quiz-correct-border: rgba(34,197,94,0.4);
    --quiz-wrong: rgba(239,68,68,0.15);
    --quiz-wrong-border: rgba(239,68,68,0.4);
}

/* ── MODE CLAIR ── */
body.light {
    --body-bg: #f0f4f8;
    --card-bg: rgba(255, 255, 255, 0.95);
    --accent-gold: #c47d00;
    --accent-gold-glow: rgba(196, 125, 0, 0.2);
    --accent-blue: #0284c7;
    --accent-blue-glow: rgba(2, 132, 199, 0.15);
    --text-white: #0f172a;
    --text-muted: #64748b;
    --border-subtle: rgba(0, 0, 0, 0.08);
    --nav-bg: rgba(240, 244, 248, 0.97);
    --input-bg: rgba(0,0,0,0.03);
    --input-border: rgba(0,0,0,0.12);
    --select-bg: #f0f4f8;
    --info-block-bg: rgba(0, 0, 0, 0.02);
    --anecdote-bg: rgba(196, 125, 0, 0.06);
    --anecdote-border: rgba(196, 125, 0, 0.2);
    --response-bg: rgba(2, 132, 199, 0.06);
    --arch-bg: rgba(196,125,0,0.05);
    --arch-border: rgba(196,125,0,0.15);
    --attack-bg: rgba(0,0,0,0.02);
    --attack-border: rgba(0,0,0,0.08);
    --alphabet-bg: rgba(0,0,0,0.04);
    --alphabet-border: rgba(2,132,199,0.2);
    --timeline-bg: rgba(0,0,0,0.02);
    --timeline-border: rgba(0,0,0,0.07);
    --card-text: #334155;
    --confirm-bg: rgba(2,132,199,0.06);
    --confirm-border: rgba(2,132,199,0.25);
    --scroll-btn-bg: rgba(255,255,255,0.95);
    --scroll-btn-border: rgba(2,132,199,0.3);
    --quiz-btn-bg: rgba(0,0,0,0.03);
    --quiz-btn-border: rgba(0,0,0,0.1);
    --quiz-btn-hover: rgba(2,132,199,0.08);
}

/* ══════════════════════════════════════
   BASE
══════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: 'Poppins', sans-serif;
    background: var(--body-bg);
    background-image:
        radial-gradient(ellipse 80% 60% at 80% 10%, rgba(56,189,248,0.07) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 10% 90%, rgba(245,166,35,0.06) 0%, transparent 60%);
    background-attachment: fixed;
    color: var(--text-white);
    margin: 0;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}
body.light {
    background-image:
        radial-gradient(ellipse 80% 60% at 80% 10%, rgba(2,132,199,0.05) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 10% 90%, rgba(196,125,0,0.04) 0%, transparent 60%);
}

/* ══════════════════════════════════════
   BARRE DE PROGRESSION
══════════════════════════════════════ */
#progress-bar {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-gold));
    z-index: 200;
    transition: width 0.1s linear;
    pointer-events: none;
}

/* ══════════════════════════════════════
   NAV
══════════════════════════════════════ */
nav {
    background: var(--nav-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-subtle);
    transition: background 0.3s ease;
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 56px;
}
.nav-inner ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 0;
    margin: 0;
}
.nav-right {
    position: absolute;
    right: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-inner ul li a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    display: block;
    padding: 18px 4px;
    position: relative;
    transition: color 0.25s ease;
    white-space: nowrap;
    line-height: 1;
}
.nav-inner ul li a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: var(--accent-blue);
    transform: scaleX(0);
    transition: transform 0.25s ease;
}
.nav-inner ul li a:hover { color: var(--text-white); }
.nav-inner ul li a:hover::after { transform: scaleX(1); }
.nav-inner ul li a.active { color: var(--accent-blue); }
.nav-inner ul li a.active::after { transform: scaleX(1); }

/* Bouton thème */
#theme-toggle {
    background: none;
    border: 1.5px solid var(--border-subtle);
    border-radius: 50px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 5px 11px;
    margin: 0;
    transition: border-color 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    line-height: 1;
    width: auto;
    letter-spacing: 0;
    text-transform: none;
    font-weight: 400;
    transform: none;
    box-shadow: none;
    position: relative;
    overflow: visible;
}
#theme-toggle::before { display: none !important; }
#theme-toggle:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    background: transparent;
    box-shadow: none;
    transform: none;
}

/* ══════════════════════════════════════
   BURGER MENU MOBILE
══════════════════════════════════════ */
#burger-btn {
    display: none;
    background: none;
    border: 1.5px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 1.2rem;
    padding: 5px 10px;
    cursor: pointer;
    margin: 0;
    transition: border-color 0.2s, color 0.2s;
    line-height: 1;
    letter-spacing: 0;
    text-transform: none;
    font-weight: 400;
    transform: none;
    box-shadow: none;
    width: auto;
}
#burger-btn::before { display: none !important; }
#burger-btn:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    background: transparent;
    box-shadow: none;
    transform: none;
}

/* ══════════════════════════════════════
   BONUS 1 — CODE INLINE STYLÉ
══════════════════════════════════════ */
code {
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
    color: var(--accent-gold);
    background: rgba(245,166,35,0.08);
    border: 1px solid rgba(245,166,35,0.18);
    border-radius: 5px;
    padding: 1px 6px;
}

/* ══════════════════════════════════════
   BONUS 2 — HOVER GLOW SUR LES CARDS
══════════════════════════════════════ */
.info-block, .arch-card, .attack-card, .anecdote {
    transition: background 0.25s ease, border-left-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
}
.info-block:hover {
    background: rgba(56,189,248,0.04);
    border-left-color: var(--accent-gold);
    box-shadow: 0 4px 24px rgba(56,189,248,0.07);
    transform: translateX(2px);
}
.arch-card:hover {
    background: rgba(245,166,35,0.1);
    box-shadow: 0 4px 20px rgba(245,166,35,0.1);
    transform: translateY(-2px);
}
.attack-card:hover {
    background: rgba(56,189,248,0.05);
    border-color: rgba(56,189,248,0.2);
    box-shadow: 0 4px 20px rgba(56,189,248,0.08);
    transform: translateY(-2px);
}

/* ══════════════════════════════════════
   MAIN & SECTION
══════════════════════════════════════ */
main {
    display: flex;
    justify-content: center;
    padding: 50px 20px 80px;
}
section {
    background: var(--card-bg);
    max-width: 860px;
    width: 100%;
    padding: 50px 48px;
    border-radius: 28px;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 2px 0 rgba(255,255,255,0.04) inset, 0 30px 80px rgba(0,0,0,0.3);
    text-align: center;
    transition: background 0.3s ease;
}

/* ══════════════════════════════════════
   ANIMATIONS SCROLL
══════════════════════════════════════ */
.anim-hidden {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}
.anim-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ══════════════════════════════════════
   TYPOGRAPHIE
══════════════════════════════════════ */
h1 {
    font-family: 'Cinzel', serif;
    color: var(--accent-gold);
    font-size: 2.8rem;
    font-weight: 700;
    margin: 0 0 8px;
    letter-spacing: 0.03em;
    line-height: 1.15;
}
h2 {
    font-family: 'Cinzel', serif;
    color: var(--accent-gold);
    margin: 0 0 6px;
}
.tagline {
    font-style: italic;
    color: var(--accent-blue);
    margin-bottom: 36px;
    display: block;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    opacity: 0.9;
}
strong { color: var(--text-white); font-weight: 600; }

/* ══════════════════════════════════════
   CADRE IMAGE
══════════════════════════════════════ */
.cadre-image {
    display: block;
    width: fit-content;
    max-width: 100%;
    margin: 0 auto 36px;
    padding: 10px;
    background: #fff;
    border: 3px solid var(--accent-blue);
    border-radius: 18px;
    box-shadow: 0 0 0 1px rgba(56,189,248,0.15), 0 16px 40px rgba(0,0,0,0.5);
    line-height: 0;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.cadre-image:hover {
    box-shadow: 0 0 0 1px rgba(56,189,248,0.4), 0 0 30px rgba(56,189,248,0.15), 0 20px 50px rgba(0,0,0,0.5);
    transform: translateY(-2px);
}
.cadre-image img {
    display: block;
    max-width: min(500px, 100%);
    width: 100%;
    height: auto;
    border-radius: 8px;
    background: #fff;
}

/* ══════════════════════════════════════
   INFO BLOCKS
══════════════════════════════════════ */
.info-block {
    text-align: left;
    background: var(--info-block-bg);
    padding: 22px 24px;
    margin-bottom: 16px;
    border-radius: 14px;
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--accent-blue);
    transition: background 0.2s ease, border-left-color 0.2s ease;
}
.info-block:hover { background: rgba(56,189,248,0.04); border-left-color: var(--accent-gold); }
.info-block h3 {
    color: var(--accent-blue);
    margin-top: 0;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.info-block p { margin: 0 0 10px; font-size: 0.92rem; line-height: 1.75; color: var(--card-text); }
.info-block p:last-child { margin-bottom: 0; }
.info-block ul { text-align: left; padding-left: 20px; margin: 12px 0 0; }
.info-block li { margin: 8px 0; font-size: 0.92rem; line-height: 1.65; color: var(--card-text); }

/* ══════════════════════════════════════
   ANECDOTE
══════════════════════════════════════ */
.anecdote {
    background: var(--anecdote-bg);
    border: 1px solid var(--anecdote-border);
    border-left: 3px solid var(--accent-gold);
    padding: 22px 24px;
    border-radius: 0 14px 14px 0;
    margin-top: 28px;
    text-align: left;
    transition: background 0.2s ease;
}
.anecdote:hover { background: rgba(245,166,35,0.1); }
.anecdote strong {
    color: var(--accent-gold);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 14px;
}
.anecdote ul { padding-left: 20px; margin: 0; }
.anecdote li { margin: 8px 0; font-size: 0.9rem; line-height: 1.65; color: var(--card-text); }

/* ══════════════════════════════════════
   BOUTON GLOBAL
══════════════════════════════════════ */
button {
    display: block;
    margin: 32px auto 0;
    background: transparent;
    border: 1.5px solid var(--accent-blue);
    color: var(--accent-blue);
    padding: 14px 42px;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 0.88rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: 50px;
    cursor: pointer;
    transition: color 0.25s ease, box-shadow 0.25s ease, transform 0.15s ease;
    position: relative;
    overflow: hidden;
}
button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-blue);
    opacity: 0;
    transition: opacity 0.25s ease;
    border-radius: 50px;
}
button:hover {
    color: var(--body-bg);
    box-shadow: 0 0 28px var(--accent-blue-glow), 0 0 60px var(--accent-blue-glow);
    transform: translateY(-1px);
}
button:hover::before { opacity: 1; }
button > * { position: relative; z-index: 1; }
button span { position: relative; z-index: 1; }
button:active { transform: translateY(0); }

/* ══════════════════════════════════════
   RESPONSE BOX
══════════════════════════════════════ */
.response-box {
    margin-top: 20px;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s ease, padding 0.35s ease, border-color 0.35s ease, opacity 0.35s ease;
    background: var(--response-bg);
    border-radius: 12px;
    color: var(--text-white);
    text-align: center;
    opacity: 0;
    border: 1px solid transparent;
}
.response-box.show {
    padding: 18px 20px;
    max-height: 800px;
    border-color: rgba(56,189,248,0.25);
    opacity: 1;
}
.highlight {
    color: var(--accent-gold);
    font-weight: 700;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.35rem;
    letter-spacing: 0.05em;
    text-shadow: 0 0 20px var(--accent-gold-glow);
    display: inline-block;
    margin-top: 6px;
}

/* ══════════════════════════════════════
   CHIFFREUR AVANCÉ (CÉSAR)
══════════════════════════════════════ */
.cipher-ui {
    text-align: left;
    padding: 4px 0;
}
.cipher-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
}
.cipher-tab {
    padding: 7px 20px;
    border-radius: 50px;
    border: 1.5px solid var(--border-subtle);
    background: transparent;
    color: var(--text-muted);
    font-family: 'Poppins', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s ease;
    margin: 0;
    transform: none;
    box-shadow: none;
    overflow: visible;
}
.cipher-tab::before { display: none !important; }
.cipher-tab:hover { border-color: var(--accent-blue); color: var(--accent-blue); background: transparent; box-shadow: none; transform: none; }
.cipher-tab.active { border-color: var(--accent-blue); color: var(--body-bg); background: var(--accent-blue); box-shadow: none; transform: none; }
.cipher-tab.active:hover { color: var(--body-bg); }

.cipher-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-blue);
    display: block;
    margin-bottom: 6px;
}
.cipher-input-wrap { margin-bottom: 14px; }
.cipher-input-wrap textarea {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-white);
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    padding: 10px 14px;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}
.cipher-input-wrap textarea:focus { border-color: var(--accent-blue); }
.cipher-key-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}
.cipher-key-row input[type="range"] { flex: 1; accent-color: var(--accent-blue); }
.cipher-key-badge {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-gold);
    min-width: 28px;
    text-align: center;
    font-family: 'Cinzel', serif;
}
.cipher-formula {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--accent-gold);
    background: rgba(245,166,35,0.08);
    border: 1px solid rgba(245,166,35,0.15);
    border-radius: 8px;
    padding: 7px 14px;
    margin-bottom: 14px;
    text-align: center;
    letter-spacing: 0.04em;
}
.cipher-output {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: var(--accent-gold);
    background: rgba(245,166,35,0.06);
    border: 1px solid rgba(245,166,35,0.15);
    border-radius: 10px;
    padding: 12px 16px;
    word-break: break-all;
    line-height: 1.6;
    min-height: 46px;
    margin-bottom: 14px;
    letter-spacing: 0.04em;
}
.cipher-stats {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin-bottom: 16px;
}
.cipher-stat {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 10px;
    text-align: center;
}
.cipher-stat span {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-blue);
    font-family: 'Cinzel', serif;
}
.cipher-stat small {
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 3px;
    display: block;
}
.cipher-bf-btn {
    display: block;
    width: 100%;
    margin: 0;
    padding: 11px 20px;
    border-radius: 10px;
    font-size: 0.82rem;
    letter-spacing: 0.04em;
}

/* Force brute */
.bf-results {
    margin-top: 14px;
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    overflow: hidden;
}
.bf-header {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 10px 14px;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border-subtle);
}
.bf-row {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 14px;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    font-size: 0.83rem;
    transition: background 0.15s;
}
.bf-row:last-child { border-bottom: none; }
.bf-row:hover { background: rgba(255,255,255,0.02); }
.bf-best { background: rgba(245,166,35,0.06) !important; }
.bf-rank { font-size: 0.75rem; min-width: 18px; color: var(--accent-gold); font-weight: 700; }
.bf-k { font-size: 0.7rem; font-weight: 700; color: var(--accent-blue); min-width: 40px; letter-spacing: 0.04em; font-family: 'Courier New', monospace; }
.bf-decoded { flex: 1; font-family: 'Courier New', monospace; font-size: 0.8rem; color: var(--text-white); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bf-score { font-size: 0.68rem; color: var(--text-muted); min-width: 36px; text-align: right; }

/* ══════════════════════════════════════
   SECTION DIVIDER
══════════════════════════════════════ */
.section-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 40px 0 28px;
}
.section-divider span {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-gold);
    white-space: nowrap;
}
.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(245,166,35,0.3), transparent);
}

/* ══════════════════════════════════════
   CONCEPT TAGS
══════════════════════════════════════ */
.concept-tag {
    display: inline-block;
    background: rgba(56,189,248,0.1);
    border: 1px solid rgba(56,189,248,0.2);
    color: var(--accent-blue);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: 20px;
    margin: 4px 3px 0;
}

/* ══════════════════════════════════════
   PAGE ACCUEIL
══════════════════════════════════════ */
.home-header { text-align: center; padding: 20px 0 44px; }
.home-header h1 { font-size: 2.6rem; margin-bottom: 0; }

.cards-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.profile-card {
    background: var(--info-block-bg);
    border: 1px solid var(--border-subtle);
    border-top: 3px solid var(--accent-blue);
    border-radius: 18px;
    padding: 28px 24px;
    text-align: left;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease, border-top-color 0.25s ease;
}
.profile-card:hover {
    background: rgba(56,189,248,0.06);
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    border-top-color: var(--accent-gold);
}
.card-era { font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-blue); font-weight: 600; margin-bottom: 10px; }
.profile-card h2 { font-size: 1.45rem; }
.card-role { font-size: 0.82rem; color: var(--text-muted); font-style: italic; margin-bottom: 18px; display: block; }
.profile-card p { font-size: 0.87rem; line-height: 1.72; color: var(--card-text); margin: 0 0 20px; }
.card-link { font-size: 0.78rem; font-weight: 600; color: var(--accent-blue); letter-spacing: 0.06em; text-transform: uppercase; transition: letter-spacing 0.2s ease; }
.profile-card:hover .card-link { letter-spacing: 0.1em; }

/* ══════════════════════════════════════
   PAGE BABBAGE
══════════════════════════════════════ */
.arch-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 20px; }
.arch-card { background: var(--arch-bg); border: 1px solid var(--arch-border); border-radius: 12px; padding: 18px; text-align: left; }
.arch-card .arch-label { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-gold); margin-bottom: 6px; display: block; }
.arch-card .arch-modern { font-size: 0.75rem; color: var(--accent-blue); margin-bottom: 8px; display: block; font-style: italic; }
.arch-card p { font-size: 0.85rem; color: var(--card-text); line-height: 1.6; margin: 0; }

.lineage-list { list-style: none; padding: 0; margin: 0; }
.lineage-list li { display: flex; align-items: flex-start; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border-subtle); text-align: left; }
.lineage-list li:last-child { border-bottom: none; }
.lineage-year { font-size: 0.75rem; font-weight: 700; color: var(--accent-gold); letter-spacing: 0.04em; min-width: 42px; padding-top: 2px; }
.lineage-content strong { display: block; font-size: 0.9rem; color: var(--text-white); margin-bottom: 3px; }
.lineage-content span { font-size: 0.82rem; color: var(--text-muted); line-height: 1.55; }

/* ══════════════════════════════════════
   PAGE CÉSAR
══════════════════════════════════════ */
.alphabet-visual { font-family: 'Courier New', monospace; background: var(--alphabet-bg); border: 1px solid var(--alphabet-border); border-radius: 12px; padding: 20px; margin: 16px 0; text-align: center; overflow-x: auto; }
.alpha-row { display: flex; justify-content: center; gap: 0; margin: 4px 0; flex-wrap: nowrap; }
.alpha-cell { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-size: 0.72rem; font-weight: 600; flex-shrink: 0; }
.alpha-cell.plain { color: var(--accent-blue); }
.alpha-cell.cipher { color: var(--accent-gold); }
.alpha-label { font-size: 0.65rem; color: var(--text-muted); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 4px; }

.attack-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0; }
.attack-card { background: var(--attack-bg); border: 1px solid var(--attack-border); border-radius: 12px; padding: 18px; text-align: left; }
.attack-card .attack-name { font-size: 0.78rem; font-weight: 700; color: var(--accent-blue); letter-spacing: 0.05em; margin-bottom: 6px; display: block; }
.attack-card .attack-complexity { font-size: 0.68rem; color: var(--accent-gold); font-family: 'Courier New', monospace; margin-bottom: 8px; display: block; }
.attack-card p { font-size: 0.83rem; color: var(--card-text); line-height: 1.6; margin: 0; }

.evolution-list { list-style: none; padding: 0; margin: 0; }
.evolution-list li { display: flex; align-items: flex-start; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border-subtle); text-align: left; }
.evolution-list li:last-child { border-bottom: none; }
.evo-badge { font-size: 0.7rem; font-weight: 700; color: var(--accent-gold); letter-spacing: 0.05em; min-width: 52px; padding-top: 2px; line-height: 1.3; }
.evo-content strong { display: block; font-size: 0.9rem; color: var(--text-white); margin-bottom: 3px; }
.evo-content span { font-size: 0.82rem; color: var(--text-muted); line-height: 1.55; }

/* ══════════════════════════════════════
   PAGE CONTACT
══════════════════════════════════════ */
.contact-header { text-align: center; padding: 10px 0 36px; }
.contact-header h1 { margin-bottom: 8px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 7px; text-align: left; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-blue); }
.form-group input,
.form-group select,
.form-group textarea {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-white);
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    padding: 12px 16px;
    transition: border-color 0.2s ease, background 0.2s ease;
    outline: none;
    width: 100%;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); opacity: 0.6; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent-blue); background: rgba(56,189,248,0.05); }
.form-group select option { background: var(--select-bg); color: var(--text-white); }
.form-group textarea { resize: vertical; min-height: 130px; line-height: 1.6; }
.form-footer { margin-top: 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.form-note { font-size: 0.78rem; color: var(--text-muted); font-style: italic; }
#msg-confirm { display: none; margin-top: 20px; padding: 16px 20px; background: var(--confirm-bg); border: 1px solid var(--confirm-border); border-radius: 12px; color: var(--accent-blue); font-size: 0.9rem; text-align: center; }

/* ══════════════════════════════════════
   FRISE CHRONOLOGIQUE
══════════════════════════════════════ */
.timeline-wrapper {
    position: relative;
    padding: 10px 0 10px 36px;
    margin-top: 20px;
}
.timeline-wrapper::before {
    content: '';
    position: absolute;
    left: 10px; top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-blue), var(--accent-gold));
    border-radius: 2px;
}
.tl-item { position: relative; margin-bottom: 10px; cursor: pointer; }
.tl-item:last-child { margin-bottom: 0; }
.tl-dot-line {
    position: absolute;
    left: -30px; top: 18px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: 2px solid var(--card-bg);
    box-shadow: 0 0 0 2px var(--accent-blue);
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.tl-item:hover .tl-dot-line,
.tl-item.open .tl-dot-line { background: var(--accent-gold); box-shadow: 0 0 0 2px var(--accent-gold); transform: scale(1.3); }
.tl-header {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 18px;
    background: var(--timeline-bg);
    border: 1px solid var(--timeline-border);
    border-radius: 12px;
    transition: background 0.2s, border-color 0.2s;
    user-select: none;
}
.tl-item:hover .tl-header,
.tl-item.open .tl-header { background: rgba(56,189,248,0.06); border-color: rgba(56,189,248,0.2); }
.tl-year { font-size: 0.78rem; font-weight: 700; color: var(--accent-gold); min-width: 56px; letter-spacing: 0.04em; }
.tl-title { font-size: 0.9rem; font-weight: 600; color: var(--text-white); flex: 1; text-align: left; }
.tl-arrow { font-size: 0.75rem; color: var(--text-muted); transition: transform 0.25s ease; }
.tl-item.open .tl-arrow { transform: rotate(180deg); }
.tl-body { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.25s ease; padding: 0 18px; }
.tl-item.open .tl-body { max-height: 200px; padding: 12px 18px 16px; }
.tl-body p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; margin: 0; text-align: left; }

/* ══════════════════════════════════════
   QUIZ
══════════════════════════════════════ */
.quiz-counter { font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 6px; text-align: left; }
.quiz-question { font-size: 0.95rem; font-weight: 600; color: var(--text-white); text-align: left; margin-bottom: 14px; line-height: 1.5; }
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-opt {
    background: var(--quiz-btn-bg);
    border: 1px solid var(--quiz-btn-border);
    border-radius: 10px;
    color: var(--text-white);
    font-family: 'Poppins', sans-serif;
    font-size: 0.88rem;
    padding: 12px 18px;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    margin: 0; width: 100%;
    letter-spacing: 0; text-transform: none; font-weight: 400;
    position: relative; overflow: visible;
}
.quiz-opt::before { display: none !important; }
.quiz-opt:hover:not(:disabled) { background: var(--quiz-btn-hover); border-color: var(--accent-blue); transform: none; box-shadow: none; color: var(--text-white); }
.quiz-opt:disabled { cursor: default; }
.quiz-opt.correct { background: rgba(34,197,94,0.15); border-color: rgba(34,197,94,0.4); color: #4ade80; }
.quiz-opt.wrong { background: rgba(239,68,68,0.15); border-color: rgba(239,68,68,0.4); color: #f87171; }
.quiz-feedback { margin-top: 12px; font-size: 0.85rem; min-height: 22px; color: var(--text-muted); text-align: left; line-height: 1.5; }
.quiz-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; gap: 12px; }
.quiz-nav button { margin: 0; padding: 10px 28px; font-size: 0.8rem; }
.quiz-score { font-size: 0.82rem; color: var(--text-muted); }
.quiz-result { text-align: center; padding: 20px 0; }
.quiz-result .score-big { font-family: 'Cinzel', serif; font-size: 3rem; color: var(--accent-gold); display: block; margin-bottom: 8px; }
.quiz-result p { color: var(--text-muted); font-size: 0.9rem; margin: 0 0 20px; }

/* ══════════════════════════════════════
   BOUTON RETOUR EN HAUT
══════════════════════════════════════ */
#scroll-top {
    position: fixed;
    bottom: 32px; right: 32px;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--scroll-btn-bg);
    border: 1.5px solid var(--scroll-btn-border);
    color: var(--accent-blue);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 99;
    padding: 0; margin: 0;
    letter-spacing: 0; text-transform: none; font-weight: 400;
}
#scroll-top::before { display: none !important; }
#scroll-top.visible { opacity: 1; pointer-events: all; }
#scroll-top:hover { transform: translateY(-3px); box-shadow: 0 0 16px var(--accent-blue-glow); background: var(--scroll-btn-bg); color: var(--accent-blue); }

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 900px) {
    section { padding: 36px 32px; }
    h1 { font-size: 2.2rem; }
}

@media (max-width: 700px) {
    /* Nav mobile burger */
    nav { padding: 0 16px; }
    .nav-inner {
        justify-content: flex-end;
        height: auto;
        padding: 10px 0;
    }
    .nav-right { position: static; }
    .nav-inner ul {
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
        padding: 4px 0 10px;
        border-top: 1px solid var(--border-subtle);
        margin-top: 4px;
    }
    .nav-inner ul.open { display: flex; }
    .nav-inner ul li a {
        font-size: 0.82rem;
        padding: 12px 4px;
        border-bottom: 1px solid var(--border-subtle);
        letter-spacing: 0.04em;
    }
    .nav-inner ul li:last-child a { border-bottom: none; }
    #burger-btn { display: flex; align-items: center; }

    main { padding: 28px 12px 60px; }
    section { padding: 28px 18px; border-radius: 18px; }
    h1 { font-size: 1.9rem; }
    .tagline { font-size: 0.88rem; margin-bottom: 24px; }
    .info-block { padding: 16px; }
    .anecdote { padding: 16px; }
    button { padding: 13px 24px; font-size: 0.82rem; width: 100%; }
    .arch-grid, .attack-grid, .cards-grid, .form-grid { grid-template-columns: 1fr; }
    .form-group.full { grid-column: 1; }
    .form-footer { flex-direction: column; align-items: flex-start; }
    #scroll-top { bottom: 20px; right: 16px; width: 38px; height: 38px; font-size: 0.95rem; }
    .cipher-stats { grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
}

@media (max-width: 480px) {
    section { padding: 18px 12px; border-radius: 14px; }
    h1 { font-size: 1.55rem; }
    .home-header h1 { font-size: 1.55rem; }
    .highlight { font-size: 1.1rem; }
    .alpha-cell { width: 18px !important; height: 18px !important; font-size: 0.5rem !important; }
    .lineage-year, .evo-badge { min-width: 36px; font-size: 0.65rem; }
    .cipher-stats { grid-template-columns: 1fr; gap: 6px; }
}