:root {
    --bg-color: #0a0e14;
    --surface: #10151f;
    --text-primary: #eef2f7;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Italian tricolore nod: green primary, coral/red secondary */
    --accent: #34d399;          /* verde */
    --accent-hover: #10b981;
    --accent2: #fb7185;         /* rosso/coral */
    --gold: #fbbf24;

    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.35);
    --gradient: linear-gradient(135deg, #34d399 0%, #38bdf8 55%, #fb7185 100%);
    --gradient-warm: linear-gradient(135deg, #34d399 0%, #fbbf24 50%, #fb7185 100%);

    --ok: #34d399;
    --ok-bg: rgba(52, 211, 153, 0.14);
    --bad: #fb7185;
    --bad-bg: rgba(251, 113, 133, 0.14);
    --radius: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', system-ui, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(at 0% 0%, rgba(52, 211, 153, 0.10) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(56, 189, 248, 0.08) 0px, transparent 45%),
        radial-gradient(at 100% 100%, rgba(251, 113, 133, 0.10) 0px, transparent 50%);
    background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent-hover); }

.container { max-width: 1100px; margin: 0 auto; padding: 2rem; }
.container--narrow { max-width: 780px; }

/* Glass */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
}

/* Navbar */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(10, 14, 20, 0.82);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.9rem 0;
}
.nav-content {
    max-width: 1100px; margin: 0 auto; padding: 0 2rem;
    display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.logo { font-size: 1.5rem; font-weight: 800; color: var(--text-primary); letter-spacing: -0.5px; white-space: nowrap; }
.logo .dot { color: var(--accent); }
.nav-links { display: flex; flex-wrap: wrap; }
.nav-links a { color: var(--text-secondary); margin: 0 0.7rem; font-weight: 600; font-size: 0.95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-streak {
    display: inline-flex; align-items: center; gap: 0.35rem;
    font-weight: 700; font-size: 0.9rem; color: var(--gold);
    background: rgba(251, 191, 36, 0.12); padding: 0.3rem 0.7rem; border-radius: 999px;
    white-space: nowrap;
}

/* Footer */
.site-footer {
    max-width: 1100px; margin: 3rem auto 0;
    padding: 1.5rem 2rem 2.5rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted); font-size: 0.85rem; text-align: center;
}

/* Hero */
.hero { text-align: center; padding: 3rem 0 2rem; }
.hero h1 {
    font-size: 3.4rem; font-weight: 800; line-height: 1.1; margin-bottom: 1rem;
    background: var(--gradient); -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p { font-size: 1.15rem; color: var(--text-secondary); max-width: 620px; margin: 0 auto; }

/* Page header */
.page-header { margin-bottom: 1.5rem; }
.page-header h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 0.3rem; }
.page-header p { color: var(--text-secondary); }
.back-link { display: inline-block; margin-bottom: 1rem; color: var(--text-secondary); font-weight: 600; }
.back-link:hover { color: var(--text-primary); }

/* Stat / dashboard tiles */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat-card { padding: 1.4rem; text-align: center; }
.stat-value { font-size: 2.1rem; font-weight: 800; color: var(--text-primary); }
.stat-value.accent { color: var(--accent); }
.stat-value.gold { color: var(--gold); }
.stat-label { font-size: 0.78rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; margin-top: 0.2rem; }

/* Quick links / mode cards */
.quick-links { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.2rem; margin-top: 1.5rem; }
.quick-link-card { padding: 1.6rem; color: var(--text-primary); display: block; transition: transform 0.25s ease, border-color 0.25s ease; position: relative; overflow: hidden; }
.quick-link-card:hover { transform: translateY(-4px); border-color: rgba(255, 255, 255, 0.2); color: var(--text-primary); }
.quick-link-card .ql-emoji { font-size: 2rem; display: block; margin-bottom: 0.6rem; }
.quick-link-card h3 { margin-bottom: 0.4rem; font-size: 1.25rem; color: var(--text-primary); }
.quick-link-card p { color: var(--text-secondary); font-size: 0.92rem; }
.quick-link-card .ql-meta { margin-top: 0.8rem; font-size: 0.8rem; color: var(--accent); font-weight: 700; }

/* Content list cards (decks, lessons, readings) */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.1rem; }
.list-card { padding: 1.3rem; display: flex; flex-direction: column; gap: 0.5rem; transition: transform 0.2s ease, border-color 0.2s ease; cursor: pointer; }
.list-card:hover { transform: translateY(-3px); border-color: rgba(255, 255, 255, 0.18); }
.list-card .lc-top { display: flex; align-items: center; gap: 0.6rem; }
.list-card .lc-emoji { font-size: 1.6rem; }
.list-card h3 { font-size: 1.1rem; color: var(--text-primary); }
.list-card p { color: var(--text-secondary); font-size: 0.88rem; flex-grow: 1; }
.list-card .lc-foot { display: flex; justify-content: space-between; align-items: center; font-size: 0.78rem; color: var(--text-muted); margin-top: 0.3rem; }
.lc-progress { height: 6px; background: rgba(255, 255, 255, 0.06); border-radius: 3px; overflow: hidden; }
.lc-progress > div { height: 100%; background: var(--gradient-warm); transition: width 0.5s ease; }

/* Badges & chips */
.badge { display: inline-block; padding: 0.2rem 0.55rem; border-radius: 6px; font-size: 0.72rem; font-weight: 700; background: rgba(255, 255, 255, 0.08); color: var(--text-secondary); letter-spacing: 0.5px; }
.badge.level { background: rgba(52, 211, 153, 0.15); color: var(--accent); }
.badge.due { background: var(--bad-bg); color: var(--bad); }
.chip { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0.3rem 0.7rem; border-radius: 999px; font-size: 0.82rem; font-weight: 600; background: rgba(255, 255, 255, 0.06); color: var(--text-secondary); border: 1px solid transparent; cursor: pointer; transition: all 0.15s; }
.chip:hover { color: var(--text-primary); border-color: var(--glass-border); }
.chip.active { background: var(--accent); color: #06231a; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.7rem 1.3rem; border-radius: 12px; font-weight: 700; font-size: 0.95rem; border: 1px solid var(--glass-border); background: rgba(255, 255, 255, 0.05); color: var(--text-primary); cursor: pointer; transition: all 0.18s ease; font-family: inherit; }
.btn:hover { border-color: rgba(255, 255, 255, 0.25); transform: translateY(-1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--accent); color: #06231a; border-color: transparent; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; }
.btn-lg { padding: 0.9rem 1.8rem; font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn-row { display: flex; gap: 0.7rem; flex-wrap: wrap; }

/* Grade buttons (SRS) */
.grade-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.6rem; margin-top: 1.2rem; }
.grade-btn { padding: 0.8rem 0.4rem; border-radius: 12px; border: 1px solid var(--glass-border); background: rgba(255, 255, 255, 0.04); color: var(--text-primary); font-weight: 700; cursor: pointer; text-align: center; transition: all 0.15s; font-family: inherit; }
.grade-btn:hover { transform: translateY(-2px); }
.grade-btn small { display: block; font-size: 0.7rem; font-weight: 500; color: var(--text-muted); margin-top: 0.15rem; }
.grade-btn.again { border-color: rgba(251, 113, 133, 0.5); }
.grade-btn.again:hover { background: var(--bad-bg); }
.grade-btn.hard:hover { background: rgba(251, 191, 36, 0.12); }
.grade-btn.good:hover, .grade-btn.easy:hover { background: var(--ok-bg); }

/* Flashcard */
.flashcard-stage { perspective: 1400px; margin: 1.5rem 0; }
.flashcard {
    position: relative; min-height: 300px; border-radius: 20px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    text-align: center; padding: 2.5rem 2rem; cursor: pointer;
    transition: transform 0.15s ease;
}
.flashcard:active { transform: scale(0.995); }
.fc-prompt { font-size: 2.4rem; font-weight: 800; margin-bottom: 0.6rem; }
.fc-sub { color: var(--text-secondary); font-size: 1rem; }
.fc-divider { width: 60%; height: 1px; background: var(--glass-border); margin: 1.4rem 0; }
.fc-answer { font-size: 1.6rem; font-weight: 700; color: var(--accent); }
.fc-example { margin-top: 1rem; color: var(--text-secondary); font-style: italic; }
.fc-example b { color: var(--text-primary); font-style: normal; }
.fc-note { margin-top: 0.9rem; font-size: 0.9rem; color: var(--text-muted); max-width: 480px; }
.fc-hint { margin-top: 1.2rem; font-size: 0.85rem; color: var(--text-muted); }
.speak-btn { background: rgba(255,255,255,0.06); border: 1px solid var(--glass-border); color: var(--accent); width: 40px; height: 40px; border-radius: 50%; cursor: pointer; font-size: 1.1rem; display: inline-flex; align-items: center; justify-content: center; transition: all 0.15s; vertical-align: middle; }
.speak-btn:hover { background: var(--accent); color: #06231a; }

/* Session progress bar */
.session-bar { height: 8px; background: rgba(255, 255, 255, 0.06); border-radius: 4px; overflow: hidden; margin-bottom: 0.4rem; }
.session-bar > div { height: 100%; background: var(--gradient-warm); transition: width 0.4s ease; }
.session-meta { display: flex; justify-content: space-between; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 1rem; }

/* Exercises */
.exercise { padding: 1.6rem; margin-bottom: 1.2rem; }
.ex-prompt { font-size: 1.2rem; font-weight: 600; margin-bottom: 1rem; line-height: 1.5; }
.ex-prompt .blank { color: var(--accent); font-weight: 800; letter-spacing: 2px; }
.ex-options { display: flex; flex-direction: column; gap: 0.6rem; }
.ex-option { padding: 0.75rem 1rem; border-radius: 12px; border: 1px solid var(--glass-border); background: rgba(255, 255, 255, 0.03); cursor: pointer; transition: all 0.15s; font-size: 1rem; }
.ex-option:hover { border-color: var(--accent); }
.ex-option.selected { border-color: var(--accent); background: var(--accent); color: #06231a; }
.ex-option.correct { border-color: var(--ok); background: var(--ok-bg); color: var(--ok); }
.ex-option.wrong { border-color: var(--bad); background: var(--bad-bg); color: var(--bad); }
.ex-option.disabled { pointer-events: none; }
.ex-input { width: 100%; padding: 0.8rem 1rem; border-radius: 12px; border: 1px solid var(--glass-border); background: rgba(255, 255, 255, 0.05); color: var(--text-primary); font-size: 1.05rem; outline: none; font-family: inherit; }
.ex-input:focus { border-color: var(--accent); }
.ex-input.correct { border-color: var(--ok); }
.ex-input.wrong { border-color: var(--bad); }

.feedback { margin-top: 1rem; padding: 0.9rem 1.1rem; border-radius: 12px; font-size: 0.95rem; display: none; }
.feedback.show { display: block; }
.feedback.ok { background: var(--ok-bg); border: 1px solid rgba(52, 211, 153, 0.3); color: var(--text-primary); }
.feedback.bad { background: var(--bad-bg); border: 1px solid rgba(251, 113, 133, 0.3); color: var(--text-primary); }
.feedback .fb-title { font-weight: 800; margin-bottom: 0.2rem; }
.feedback .fb-answer { color: var(--accent); font-weight: 700; }

/* Token / word-build exercise */
.token-tray, .token-answer { display: flex; flex-wrap: wrap; gap: 0.5rem; min-height: 48px; padding: 0.5rem; border-radius: 12px; }
.token-answer { border: 1px dashed var(--glass-border); margin-bottom: 0.8rem; background: rgba(255,255,255,0.02); }
.token { padding: 0.45rem 0.8rem; border-radius: 10px; background: rgba(255, 255, 255, 0.07); border: 1px solid var(--glass-border); cursor: pointer; font-size: 1rem; user-select: none; transition: all 0.12s; }
.token:hover { border-color: var(--accent); transform: translateY(-1px); }

/* Grammar lesson prose */
.lesson-section { padding: 1.6rem; margin-bottom: 1.2rem; }
.lesson-section h2 { font-size: 1.35rem; margin-bottom: 0.7rem; color: var(--text-primary); }
.lesson-section h3 { font-size: 1.05rem; margin: 1rem 0 0.4rem; color: var(--accent); }
.lesson-section p { color: var(--text-secondary); margin-bottom: 0.7rem; }
.lesson-section ul, .lesson-section ol { color: var(--text-secondary); margin: 0.4rem 0 0.9rem 1.4rem; }
.lesson-section li { margin-bottom: 0.3rem; }
.lesson-section b, .lesson-section strong { color: var(--text-primary); }
.lesson-section em { color: var(--accent); font-style: normal; font-weight: 600; }
.example-box { background: rgba(255, 255, 255, 0.03); border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0; padding: 0.7rem 1rem; margin: 0.5rem 0; }
.example-box .ex-it { font-weight: 600; }
.example-box .ex-en { color: var(--text-muted); font-size: 0.9rem; }
table.conj { width: 100%; border-collapse: collapse; margin: 0.6rem 0 1rem; }
table.conj th, table.conj td { padding: 0.5rem 0.8rem; border-bottom: 1px solid var(--glass-border); text-align: left; font-size: 0.95rem; }
table.conj th { color: var(--text-secondary); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.5px; }
table.conj td:first-child { color: var(--text-muted); }
table.conj b { color: var(--accent); }

/* Reading */
.reading-body { font-size: 1.18rem; line-height: 1.95; }
.reading-body p { margin-bottom: 1.2rem; }
.gloss-word { cursor: pointer; border-bottom: 1px dotted rgba(52, 211, 153, 0.5); transition: background 0.15s; border-radius: 3px; }
.gloss-word:hover { background: rgba(52, 211, 153, 0.14); }
.gloss-pop {
    position: fixed; z-index: 500; background: #131a26; border: 1px solid var(--glass-border);
    border-radius: 10px; padding: 0.7rem 0.9rem; box-shadow: 0 12px 30px rgba(0,0,0,0.6);
    max-width: 280px; font-size: 0.95rem; pointer-events: auto;
}
.gloss-pop .gp-word { font-weight: 800; color: var(--accent); display: flex; align-items: center; gap: 0.4rem; }
.gloss-pop .gp-def { color: var(--text-secondary); font-size: 0.9rem; margin-top: 0.2rem; }
.reading-toolbar { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1.2rem; align-items: center; }
.reading-hint { font-size: 0.85rem; color: var(--text-muted); }

/* Toast */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(120%); background: var(--surface); border: 1px solid var(--glass-border); color: var(--text-primary); padding: 0.8rem 1.3rem; border-radius: 999px; box-shadow: var(--card-shadow); font-weight: 600; z-index: 1000; transition: transform 0.35s cubic-bezier(.2,.9,.3,1.3); }
.toast.show { transform: translateX(-50%) translateY(0); }

/* Empty / done states */
.center-state { text-align: center; padding: 3rem 1rem; }
.center-state .cs-emoji { font-size: 3.5rem; margin-bottom: 0.8rem; }
.center-state h2 { font-size: 1.6rem; margin-bottom: 0.5rem; }
.center-state p { color: var(--text-secondary); max-width: 440px; margin: 0 auto 1.4rem; }

/* Skeleton */
.skeleton { animation: pulse 1.5s infinite; background: linear-gradient(90deg, rgba(255,255,255,0.02) 25%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.02) 75%); background-size: 200% 100%; min-height: 120px; border-radius: var(--radius); }
@keyframes pulse { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.section-title { font-size: 1.4rem; font-weight: 800; margin: 2.2rem 0 1rem; }
.muted { color: var(--text-muted); }
.hidden { display: none !important; }

/* Word of the day */
.wotd { padding: 1.6rem 1.8rem; margin-bottom: 2rem; display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem; }
.wotd .wotd-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1.5px; color: var(--gold); font-weight: 700; }
.wotd .wotd-word { font-size: 2rem; font-weight: 800; }
.wotd .wotd-en { color: var(--text-secondary); }
.wotd .wotd-ex { color: var(--text-muted); font-style: italic; margin-top: 0.3rem; }

@media (max-width: 640px) {
    .container { padding: 1.2rem; }
    .hero h1 { font-size: 2.4rem; }
    .nav-content { flex-wrap: wrap; }
    .fc-prompt { font-size: 1.9rem; }
    .grade-row { grid-template-columns: repeat(2, 1fr); }
    .flashcard { min-height: 200px; padding: 1.8rem 1.4rem; }
}