/* assets/css/guest.css - CSS riêng cho Guest pages */

/* ==========================================================
   QuizTech Guest Styles — Namespaced with "qt-"
   ========================================================== */
:root {
    --qt-ink: #0B0E14;
    --qt-ink-soft: #4B5468;
    --qt-paper: #F7F7FB;
    --qt-panel: #FFFFFF;
    --qt-violet-1: #667eea;
    --qt-violet-2: #764ba2;
    --qt-mint: #2DD4BF;
    --qt-amber: #F5A524;
    --qt-line: #E6E6F0;
    --qt-radius: 18px;
}

/* ---------- Navbar polish ---------- */
.navbar {
    box-shadow: 0 6px 24px rgba(102, 126, 234, 0.25);
}
.navbar-brand {
    font-family: 'Space Grotesk', sans-serif;
    letter-spacing: 0.2px;
}

.qt-mono {
    font-family: 'IBM Plex Mono', monospace;
}
.qt-display {
    font-family: 'Space Grotesk', sans-serif;
}

/* ---------- Hero ---------- */
.qt-hero {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(1100px 480px at 85% -10%, rgba(102, 126, 234, 0.16), transparent 60%),
        var(--qt-paper);
    padding: 76px 0 88px;
    border-bottom: 1px solid var(--qt-line);
}

.qt-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--qt-violet-2);
    background: rgba(102, 126, 234, 0.08);
    border: 1px solid rgba(102, 126, 234, 0.25);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 1.25rem;
}

.qt-eyebrow .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--qt-mint);
    box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.2);
}

.qt-hero h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(2.1rem, 4vw, 3.2rem);
    line-height: 1.12;
    letter-spacing: -0.02em;
}

.qt-hero h1 .grad {
    background: linear-gradient(135deg, var(--qt-violet-1), var(--qt-violet-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.qt-hero p.lead-copy {
    color: var(--qt-ink-soft);
    font-size: 1.08rem;
    max-width: 520px;
}

.qt-btn-primary {
    background: linear-gradient(135deg, var(--qt-violet-1), var(--qt-violet-2));
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 10px 24px rgba(102, 126, 234, 0.35);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.qt-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(102, 126, 234, 0.42);
    color: #fff;
}

.qt-btn-ghost {
    border: 1.5px solid var(--qt-line);
    color: var(--qt-ink);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    background: #fff;
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.qt-btn-ghost:hover {
    border-color: var(--qt-violet-1);
    color: var(--qt-ink);
    transform: translateY(-2px);
}

/* ---------- Terminal mockup ---------- */
.qt-terminal {
    background: var(--qt-ink);
    border-radius: var(--qt-radius);
    box-shadow: 0 30px 60px -20px rgba(11, 14, 20, 0.45);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.qt-terminal-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 0.9rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.qt-terminal-bar .qt-tlbtn {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.qt-terminal-bar .fname {
    margin-left: 0.5rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.55);
}

.qt-terminal-body {
    padding: 1.4rem 1.4rem 1.6rem;
}

.qt-terminal-q {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    color: var(--qt-mint);
    margin-bottom: 0.4rem;
}

.qt-terminal-body h6 {
    color: #fff;
    font-weight: 600;
    margin-bottom: 1rem;
}

.qt-opt {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.75rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.qt-opt .ring {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    flex: none;
}

.qt-opt.correct {
    border-color: rgba(45, 212, 191, 0.5);
    background: rgba(45, 212, 191, 0.08);
    color: #fff;
}

.qt-opt.correct .ring {
    border-color: var(--qt-mint);
    background: var(--qt-mint);
}

.qt-terminal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.1rem;
    padding-top: 1rem;
    border-top: 1px dashed rgba(255, 255, 255, 0.1);
}

.qt-badge-live {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    color: var(--qt-mint);
}

.qt-caret {
    display: inline-block;
    width: 7px;
    height: 14px;
    background: var(--qt-mint);
    margin-left: 2px;
    animation: qt-blink 1s steps(1) infinite;
    vertical-align: middle;
}

@keyframes qt-blink {
    50% {
        opacity: 0;
    }
}

/* ---------- Section shell ---------- */
.qt-section {
    padding: 70px 0;
}

.qt-section-head {
    max-width: 640px;
    margin-bottom: 2.5rem;
}

.qt-kicker {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    color: var(--qt-violet-2);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.qt-section-head h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(1.6rem, 2.6vw, 2.1rem);
    margin-top: 0.4rem;
}

.qt-section-head p {
    color: var(--qt-ink-soft);
}

/* ---------- Stat strip ---------- */
.qt-stat-strip {
    background: var(--qt-panel);
    border: 1px solid var(--qt-line);
    border-radius: var(--qt-radius);
    padding: 1.75rem 1rem;
    box-shadow: 0 12px 30px -18px rgba(20, 20, 50, 0.15);
}

.qt-stat {
    text-align: center;
    padding: 0.5rem 0;
}

.qt-stat .num {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 2.1rem;
}

.qt-stat .lbl {
    color: var(--qt-ink-soft);
    font-size: 0.85rem;
}

.qt-stat + .qt-stat {
    border-left: 1px solid var(--qt-line);
}

/* ---------- Feature cards ---------- */
.qt-feature {
    height: 100%;
    background: var(--qt-panel);
    border: 1px solid var(--qt-line);
    border-radius: 16px;
    padding: 1.6rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.qt-feature:hover {
    transform: translateY(-4px);
    border-color: rgba(102, 126, 234, 0.4);
    box-shadow: 0 16px 34px -20px rgba(102, 126, 234, 0.4);
}

.qt-feature .tag {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    color: var(--qt-violet-2);
    background: rgba(102, 126, 234, 0.08);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    margin-bottom: 0.9rem;
}

.qt-feature .icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--qt-violet-1), var(--qt-violet-2));
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 0.9rem;
}

.qt-feature h5 {
    font-weight: 700;
}

.qt-feature p {
    color: var(--qt-ink-soft);
    font-size: 0.92rem;
    margin-bottom: 0;
}

/* ---------- How it works ---------- */
.qt-step {
    position: relative;
    padding-left: 2.6rem;
}

.qt-step .qt-step-no {
    position: absolute;
    left: 0;
    top: 0;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    color: var(--qt-mint);
}

.qt-step h6 {
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.qt-step p {
    color: var(--qt-ink-soft);
    font-size: 0.92rem;
}

/* ---------- Subject / exam cards (Guest) ---------- */
.qt-subject-card {
    height: 100%;
    background: var(--qt-panel);
    border: 1px solid var(--qt-line);
    border-radius: 16px;
    padding: 1.5rem;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.qt-subject-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 36px -22px rgba(20, 20, 50, 0.35);
}

.qt-subject-card .emoji {
    font-size: 2.4rem;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.qt-subject-card h5 {
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.qt-subject-card p {
    color: var(--qt-ink-soft);
}

.qt-exam-card {
    height: 100%;
    background: var(--qt-panel);
    border: 1px solid var(--qt-line);
    border-radius: 16px;
    padding: 1.4rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.qt-exam-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 36px -22px rgba(20, 20, 50, 0.35);
}

.qt-exam-card .subject-tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    color: var(--qt-violet-2);
}

.qt-exam-card h6 {
    font-weight: 700;
    margin: 0.35rem 0 0.9rem;
}

/* ---------- CTA banner ---------- */
.qt-cta {
    background: linear-gradient(135deg, var(--qt-violet-1), var(--qt-violet-2));
    border-radius: 24px;
    padding: 3rem 2rem;
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.qt-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(600px 260px at 15% 0%, rgba(255, 255, 255, 0.18), transparent 60%);
}

.qt-cta h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    position: relative;
}

.qt-cta p {
    opacity: 0.9;
    position: relative;
}

.qt-cta .qt-cta-actions {
    position: relative;
}

.qt-cta .btn-light {
    font-weight: 600;
    border-radius: 12px;
}

.qt-cta .btn-outline-light {
    font-weight: 600;
    border-radius: 12px;
}

/* ---------- Reveal-on-scroll ---------- */
.qt-reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.qt-reveal.qt-in {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .qt-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .qt-caret {
        animation: none;
    }
}

@media (max-width: 767px) {
    .qt-stat + .qt-stat {
        border-left: none;
        border-top: 1px solid var(--qt-line);
    }
}