/*
 * quiz.css — enhanced answer feedback + 15 background themes
 */

/* ── Answer option base ─────────────────────────────────────────── */
.answer-option {
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    transition: background 180ms, border-color 180ms, box-shadow 180ms, transform 120ms;
    position: relative;
}

.answer-option:hover:not(:disabled):not(.state-correct):not(.state-wrong):not(.state-reveal) {
    border-color: #3b82f6;
    background: #eff6ff;
    box-shadow: 0 4px 14px rgba(59,130,246,0.15);
    transform: translateY(-1px);
}

/* ── State: correct — vivid green burst ─────────────────────────── */
.state-correct {
    background: linear-gradient(135deg, #16a34a 0%, #22c55e 100%) !important;
    border-color: #15803d !important;
    color: #fff !important;
    box-shadow: 0 0 0 3px rgba(34,197,94,0.35),
                0 6px 20px rgba(22,163,74,0.45) !important;
    pointer-events: none;
    animation: correctPop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.state-correct .answer-label {
    background: rgba(255,255,255,0.25) !important;
    color: #fff !important;
}

.state-correct::after {
    content: ' ✓';
    font-weight: 900;
    font-size: 1.05rem;
}

@keyframes correctPop {
    from { transform: scale(0.93); opacity: 0.7; }
    to   { transform: scale(1);    opacity: 1; }
}

/* ── State: wrong — vivid red + shake ───────────────────────────── */
.state-wrong {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%) !important;
    border-color: #b91c1c !important;
    color: #fff !important;
    box-shadow: 0 0 0 3px rgba(239,68,68,0.35),
                0 6px 20px rgba(220,38,38,0.45) !important;
    pointer-events: none;
    animation: wrongShake 0.45s ease-in-out both;
}

.state-wrong .answer-label {
    background: rgba(255,255,255,0.25) !important;
    color: #fff !important;
}

.state-wrong::after {
    content: ' ✗';
    font-weight: 900;
    font-size: 1.05rem;
}

@keyframes wrongShake {
    0%,100% { transform: translateX(0); }
    12%     { transform: translateX(-7px) rotate(-0.5deg); }
    25%     { transform: translateX( 7px) rotate( 0.5deg); }
    37%     { transform: translateX(-5px); }
    50%     { transform: translateX( 5px); }
    62%     { transform: translateX(-3px); }
    75%     { transform: translateX( 3px); }
    87%     { transform: translateX(-1px); }
}

/* ── State: reveal correct — pulsing green ──────────────────────── */
.state-reveal {
    background: linear-gradient(135deg, #15803d 0%, #16a34a 100%) !important;
    border-color: #14532d !important;
    color: #fff !important;
    pointer-events: none;
    animation: revealPulse 0.7s ease-in-out infinite alternate;
}

.state-reveal .answer-label {
    background: rgba(255,255,255,0.25) !important;
    color: #fff !important;
}

.state-reveal::after {
    content: ' ✓';
    font-weight: 900;
    font-size: 1.05rem;
}

@keyframes revealPulse {
    from {
        box-shadow: 0 0 0 3px rgba(22,163,74,0.4),
                    0 4px 16px rgba(22,163,74,0.3);
    }
    to {
        box-shadow: 0 0 0 8px rgba(22,163,74,0.2),
                    0 8px 28px rgba(22,163,74,0.5),
                    0 0 40px rgba(22,163,74,0.15);
    }
}

/* ── Card shake on wrong answer ──────────────────────────────────── */
@keyframes cardShake {
    0%,100% { transform: translateX(0) rotate(0deg); }
    15%     { transform: translateX(-5px) rotate(-0.3deg); }
    30%     { transform: translateX( 5px) rotate( 0.3deg); }
    45%     { transform: translateX(-4px); }
    60%     { transform: translateX( 4px); }
    75%     { transform: translateX(-2px); }
}

.card-shake {
    animation: cardShake 0.45s ease-in-out;
}

/* ── Next Question button ───────────────────────────────────────── */
#next-btn {
    display: none;
    width: 100%;
    padding: 14px;
    border-radius: 50px;
    border: none;
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    margin-top: 12px;
    opacity: 0;
    transition: opacity 280ms ease, transform 200ms ease;
    box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

#next-btn.visible {
    opacity: 1;
    transform: translateY(0);
}

#next-btn:hover { opacity: 0.9; transform: translateY(-1px); }

/* ── Question rating area ───────────────────────────────────────── */
#question-rating {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid #e5e7eb;
}

#question-rating p {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 8px;
    font-weight: 600;
}

/* ── Quiz end screen ────────────────────────────────────────────── */
#quiz-end-screen {
    background: #fff;
    border-radius: 16px;
    padding: 32px 24px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    text-align: center;
    animation: fadeInUp 350ms ease both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.end-score-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 20px 0;
}

.end-score-box { border-radius: 10px; padding: 16px; }
.end-score-box.correct { background: #dcfce7; color: #15803d; }
.end-score-box.wrong   { background: #fee2e2; color: #dc2626; }
.end-score-box.total   { background: #fef3c7; color: #b45309; grid-column: span 2; }
.end-score-label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.end-score-val   { font-size: 1.8rem; font-weight: 800; line-height: 1.2; margin-top: 4px; }

.perf-badge {
    display: inline-block;
    padding: 5px 18px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 14px;
}
.perf-badge.badge-red   { background: #fee2e2; color: #dc2626; }
.perf-badge.badge-amber { background: #fef3c7; color: #b45309; }
.perf-badge.badge-green { background: #dcfce7; color: #15803d; }

.end-message { font-size: 0.88rem; color: #6b7280; margin-bottom: 20px; line-height: 1.6; }
.end-message a { color: #2563eb; font-weight: 600; }

.end-xp-box {
    background: #ede9fe;
    border-radius: 12px;
    padding: 12px 20px;
    color: #7c3aed;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 16px;
}
.end-xp-box span { font-size: 0.82rem; font-weight: 500; margin-left: 6px; color: #6d28d9; }

.end-guest-cta {
    background: #f0f9ff;
    border: 1.5px solid #bae6fd;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
}
.end-guest-cta p { font-weight: 700; color: #0369a1; font-size: 0.9rem; margin-bottom: 10px; }
.end-cta-btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.end-cta-btns a { padding: 10px 22px; border-radius: 50px; font-weight: 700; font-size: 0.88rem; text-decoration: none; transition: opacity 0.15s; }
.end-cta-btns a:hover { opacity: 0.88; }
.btn-end-login  { background: #e5e7eb; color: #374151; }
.btn-end-signup { background: linear-gradient(135deg, #1e3a8a, #3b82f6); color: #fff; }

.btn-play-again {
    margin-top: 16px; width: 100%; padding: 14px; border-radius: 12px;
    border: none; background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    color: #fff; font-size: 1rem; font-weight: 700; cursor: pointer;
    font-family: 'Poppins', sans-serif; transition: opacity 0.15s;
}
.btn-play-again:hover { opacity: 0.9; }

.end-suggestions-title {
    font-size: 0.82rem; font-weight: 800; color: #9ca3af;
    text-transform: uppercase; letter-spacing: 0.07em; margin: 20px 0 10px; text-align: left;
}
.end-quiz-cards { display: flex; flex-direction: column; gap: 8px; }
.end-quiz-card {
    background: #f9fafb; border: 1.5px solid #e5e7eb; border-radius: 12px;
    padding: 12px 16px; display: flex; justify-content: space-between;
    align-items: center; cursor: pointer; text-align: left;
    transition: border-color 0.15s, background 0.15s; width: 100%; font-family: 'Poppins', sans-serif;
}
.end-quiz-card:hover { border-color: #3b82f6; background: #eff6ff; }
.end-quiz-card-title { font-weight: 700; font-size: 0.88rem; color: #111827; }
.end-quiz-card-meta  { font-size: 0.78rem; color: #6b7280; margin-top: 2px; }
.btn-quiz-start {
    background: #3b82f6; color: #fff; border: none; border-radius: 50px;
    padding: 7px 16px; font-size: 0.82rem; font-weight: 700; cursor: pointer;
    font-family: 'Poppins', sans-serif; white-space: nowrap; flex-shrink: 0;
    margin-left: 12px; transition: background 0.15s;
}
.btn-quiz-start:hover { background: #2563eb; }


/* ══════════════════════════════════════════════════════════════════
   15 BACKGROUND THEMES — applied to .quiz-bg every 5 questions
   ══════════════════════════════════════════════════════════════════ */

.quiz-bg, .quiz-wrap {
    transition: background-color 0.8s ease;
}

/* 1 — Horizon Blue (default) */
.quiz-bg.theme-1, .quiz-wrap.theme-1 {
    background-color: #f0f4ff;
    background-image: none;
}

/* 2 — Green Bubbles */
.quiz-bg.theme-2, .quiz-wrap.theme-2 {
    background-color: #e8f8ed;
    background-image:
        radial-gradient(circle, rgba(34,197,94,0.22) 14px, transparent 15px),
        radial-gradient(circle, rgba(16,185,129,0.14) 8px, transparent 9px),
        radial-gradient(circle, rgba(52,211,153,0.18) 20px, transparent 21px);
    background-size: 80px 80px, 55px 55px, 110px 110px;
    background-position: 0 0, 40px 40px, 20px 60px;
}

/* 3 — Ocean Waves */
.quiz-bg.theme-3, .quiz-wrap.theme-3 {
    background-color: #dbeffe;
    background-image:
        radial-gradient(ellipse 200% 18% at 50% 0%,   rgba(59,130,246,0.22) 100%, transparent 100%),
        radial-gradient(ellipse 200% 18% at 50% 33%,  rgba(59,130,246,0.16) 100%, transparent 100%),
        radial-gradient(ellipse 200% 18% at 50% 66%,  rgba(59,130,246,0.12) 100%, transparent 100%),
        radial-gradient(ellipse 200% 18% at 50% 100%, rgba(59,130,246,0.10) 100%, transparent 100%);
    background-size: 400px 90px;
    background-position: 0 0, 200px 30px, 0 60px, 200px 90px;
}

/* 4 — Lavender Stars */
.quiz-bg.theme-4, .quiz-wrap.theme-4 {
    background-color: #f0ebff;
    background-image:
        radial-gradient(circle, rgba(139,92,246,0.28) 3px, transparent 3px),
        radial-gradient(circle, rgba(167,139,250,0.18) 2px, transparent 2px);
    background-size: 50px 50px, 30px 30px;
    background-position: 0 0, 15px 15px;
}

/* 5 — Sunset Glow */
.quiz-bg.theme-5, .quiz-wrap.theme-5 {
    background-color: #fff4ed;
    background-image:
        radial-gradient(ellipse 80% 60% at 80% 20%, rgba(251,146,60,0.18) 100%, transparent 100%),
        radial-gradient(ellipse 60% 40% at 20% 80%, rgba(244,63,94,0.14) 100%, transparent 100%);
}

/* 6 — Mint Breeze */
.quiz-bg.theme-6, .quiz-wrap.theme-6 {
    background-color: #e6fff7;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 18px,
            rgba(20,184,166,0.10) 18px,
            rgba(20,184,166,0.10) 19px
        ),
        repeating-linear-gradient(
            -45deg,
            transparent,
            transparent 18px,
            rgba(20,184,166,0.07) 18px,
            rgba(20,184,166,0.07) 19px
        );
}

/* 7 — Teal Diamonds */
.quiz-bg.theme-7, .quiz-wrap.theme-7 {
    background-color: #e0fafa;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent 0px,
            transparent 20px,
            rgba(20,184,166,0.15) 20px,
            rgba(20,184,166,0.15) 21px
        ),
        repeating-linear-gradient(
            -45deg,
            transparent 0px,
            transparent 20px,
            rgba(20,184,166,0.15) 20px,
            rgba(20,184,166,0.15) 21px
        );
}

/* 8 — Rose Bloom */
.quiz-bg.theme-8, .quiz-wrap.theme-8 {
    background-color: #fff0f5;
    background-image:
        radial-gradient(circle, rgba(244,63,94,0.12) 20px, transparent 21px),
        radial-gradient(circle, rgba(251,113,133,0.08) 12px, transparent 13px),
        radial-gradient(circle, rgba(253,164,175,0.10) 30px, transparent 31px);
    background-size: 90px 90px, 60px 60px, 120px 120px;
    background-position: 0 0, 45px 45px, 25px 70px;
}

/* 9 — Forest Dots */
.quiz-bg.theme-9, .quiz-wrap.theme-9 {
    background-color: #edfae4;
    background-image:
        radial-gradient(circle, rgba(22,163,74,0.20) 5px, transparent 5px),
        radial-gradient(circle, rgba(21,128,61,0.12) 3px, transparent 3px);
    background-size: 40px 40px, 25px 25px;
    background-position: 0 0, 12px 12px;
}

/* 10 — Night Galaxy */
.quiz-bg.theme-10, .quiz-wrap.theme-10 {
    background-color: #e8eaf6;
    background-image:
        radial-gradient(circle, rgba(99,102,241,0.30) 2px, transparent 2px),
        radial-gradient(circle, rgba(129,140,248,0.20) 1px, transparent 1px),
        radial-gradient(circle, rgba(165,180,252,0.15) 3px, transparent 3px);
    background-size: 35px 35px, 20px 20px, 55px 55px;
    background-position: 0 0, 10px 10px, 28px 28px;
}

/* 11 — Golden Hour */
.quiz-bg.theme-11, .quiz-wrap.theme-11 {
    background-color: #fffaeb;
    background-image:
        repeating-linear-gradient(
            60deg,
            transparent,
            transparent 22px,
            rgba(245,158,11,0.08) 22px,
            rgba(245,158,11,0.08) 23px
        ),
        radial-gradient(ellipse 70% 50% at 90% 10%, rgba(251,191,36,0.20) 100%, transparent 100%);
}

/* 12 — Arctic Frost */
.quiz-bg.theme-12, .quiz-wrap.theme-12 {
    background-color: #edf7ff;
    background-image:
        radial-gradient(circle, rgba(147,210,255,0.30) 4px, transparent 4px),
        radial-gradient(circle, rgba(186,230,253,0.20) 2px, transparent 2px),
        radial-gradient(circle, rgba(224,242,254,0.25) 6px, transparent 6px);
    background-size: 45px 45px, 28px 28px, 70px 70px;
    background-position: 0 0, 14px 14px, 35px 35px;
}

/* 13 — Coral Reef */
.quiz-bg.theme-13, .quiz-wrap.theme-13 {
    background-color: #fff2ee;
    background-image:
        radial-gradient(ellipse 200% 20% at 30% 0%,   rgba(249,115,22,0.15) 100%, transparent 100%),
        radial-gradient(ellipse 200% 20% at 70% 50%,  rgba(234,88,12,0.12) 100%, transparent 100%),
        radial-gradient(ellipse 200% 20% at 40% 100%, rgba(249,115,22,0.10) 100%, transparent 100%);
    background-size: 500px 80px;
    background-position: 0 0, 0 40px, 0 80px;
}

/* 14 — Orchid Dreams */
.quiz-bg.theme-14, .quiz-wrap.theme-14 {
    background-color: #f7eeff;
    background-image:
        radial-gradient(circle, rgba(168,85,247,0.18) 18px, transparent 19px),
        radial-gradient(circle, rgba(192,132,252,0.12) 10px, transparent 11px),
        radial-gradient(circle, rgba(216,180,254,0.08) 26px, transparent 27px);
    background-size: 100px 100px, 65px 65px, 140px 140px;
    background-position: 0 0, 50px 50px, 30px 80px;
}

/* 15 — Jade Isle */
.quiz-bg.theme-15, .quiz-wrap.theme-15 {
    background-color: #e6f5ee;
    background-image:
        radial-gradient(ellipse 200% 15% at 50% 25%,  rgba(5,150,105,0.14) 100%, transparent 100%),
        radial-gradient(ellipse 200% 15% at 50% 75%,  rgba(16,185,129,0.10) 100%, transparent 100%),
        radial-gradient(circle, rgba(52,211,153,0.16) 4px, transparent 4px);
    background-size: 600px 100px, 600px 100px, 50px 50px;
    background-position: 0 0, 0 50px, 0 0;
}