/* Qwinzo Landing — clean dark theme, app-aligned */

:root {
    --bg: #0d0d0d;
    --bg-elevated: #141414;
    --card: #1a1a1a;
    --card-hover: #222222;
    --border: #2a2a2a;
    --text: #ffffff;
    --text-muted: #aaaaaa;
    --text-dim: #666666;
    --primary: #ffd700;
    --primary-dark: #ffc107;
    --success: #00e676;
    --danger: #ff5252;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
    --max: 1140px;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(100% - 32px, var(--max));
    margin-inline: auto;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 13, 13, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: 72px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #000;
    font-weight: 800;
    font-size: 18px;
    display: grid;
    place-items: center;
}

.brand-name {
    font-weight: 700;
    font-size: 18px;
    color: var(--primary);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-left: auto;
}

.site-nav a {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.site-nav a:hover {
    color: var(--text);
}

.header-cta {
    margin-left: 8px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-left: auto;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.2s;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #000;
    box-shadow: 0 8px 24px rgba(255, 215, 0, 0.18);
}

.btn-primary:hover {
    box-shadow: 0 12px 28px rgba(255, 215, 0, 0.28);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--text-muted);
    background: var(--card);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid rgba(255, 215, 0, 0.35);
}

.btn-outline:hover {
    background: rgba(255, 215, 0, 0.08);
}

.btn-sm {
    padding: 10px 18px;
    font-size: 13px;
    border-radius: 10px;
}

.btn-lg {
    padding: 14px 24px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    padding: 12px 16px;
}

/* Hero */
.hero {
    padding: 56px 0 72px;
    background:
        radial-gradient(ellipse 80% 60% at 70% -10%, rgba(255, 215, 0, 0.08), transparent),
        radial-gradient(ellipse 50% 40% at 0% 50%, rgba(255, 255, 255, 0.03), transparent);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: center;
}

.pill {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.pill-live {
    color: var(--success);
    border-color: rgba(0, 230, 118, 0.25);
    background: rgba(0, 230, 118, 0.08);
}

.hero-copy h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    line-height: 1.12;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 18px;
}

.hero-lead {
    color: var(--text-muted);
    font-size: clamp(1rem, 2vw, 1.125rem);
    max-width: 520px;
    margin-bottom: 28px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 36px;
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
}

.stat strong {
    display: block;
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 700;
}

.stat span {
    font-size: 13px;
    color: var(--text-dim);
}

/* Phone mockup */
.phone-mockup {
    justify-self: center;
    width: min(100%, 320px);
    padding: 12px;
    border-radius: 32px;
    background: linear-gradient(160deg, #2a2a2a, #111);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.phone-screen {
    background: var(--bg);
    border-radius: 24px;
    padding: 20px 16px;
    min-height: 380px;
}

.mock-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
    font-size: 14px;
}

.mock-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
}

.mock-balance {
    background: linear-gradient(135deg, #1f1f00, #1a1a1a);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 16px;
}

.mock-balance small {
    color: var(--text-dim);
    font-size: 12px;
}

.mock-balance strong {
    display: block;
    font-size: 28px;
    color: var(--primary);
    margin-top: 4px;
}

.mock-quiz {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    margin-bottom: 10px;
    position: relative;
}

.mock-quiz-dim {
    opacity: 0.65;
}

.mock-live {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 10px;
    font-weight: 700;
    color: var(--success);
    background: rgba(0, 230, 118, 0.12);
    padding: 3px 8px;
    border-radius: 999px;
}

.mock-quiz h3 {
    font-size: 15px;
    margin-bottom: 10px;
    padding-right: 48px;
}

.mock-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.mock-win {
    color: var(--success);
    font-weight: 600;
}

/* Sections */
.section {
    padding: 72px 0;
}

.section-head {
    margin-bottom: 40px;
    max-width: 640px;
}

.section-head.center {
    text-align: center;
    margin-inline: auto;
}

.section-label {
    display: inline-block;
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.platform-disclaimer {
    color: #e53935;
    font-size: 14px;
    line-height: 1.6;
    font-weight: 500;
    margin: 0 0 24px;
    padding: 12px 14px;
    border-left: 3px solid #e53935;
    background: rgba(229, 57, 53, 0.08);
    border-radius: 0 8px 8px 0;
}

.platform-disclaimer strong {
    font-weight: 700;
}

.section-head h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.section-head p {
    color: var(--text-muted);
    font-size: 15px;
}

/* Quiz grid */
.quizzes-section {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.quiz-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.quiz-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: border-color 0.2s, transform 0.2s;
}

.quiz-card:hover {
    border-color: rgba(255, 215, 0, 0.25);
    transform: translateY(-2px);
}

.quiz-card-top {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 12px;
    align-items: start;
}

.quiz-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid;
    display: grid;
    place-items: center;
    font-weight: 800;
    font-size: 18px;
}

.quiz-category {
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

.quiz-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-top: 2px;
}

.live-tag {
    font-size: 10px;
    font-weight: 700;
    color: var(--success);
    background: rgba(0, 230, 118, 0.12);
    padding: 4px 10px;
    border-radius: 999px;
    align-self: start;
}

.quiz-desc {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.55;
    flex: 1;
}

.quiz-pricing {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.price-box {
    flex: 1;
    padding: 12px 14px;
    text-align: center;
}

.price-box small {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.price-box strong {
    font-size: 20px;
    font-weight: 800;
}

.price-box-win strong {
    color: var(--success);
}

.price-divider {
    width: 1px;
    align-self: stretch;
    background: var(--border);
}

.quiz-meta {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
}

.quiz-meta li {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.quiz-meta svg {
    opacity: 0.7;
    flex-shrink: 0;
}

.badge {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
}

.badge-easy {
    background: rgba(255, 215, 0, 0.12);
    color: var(--primary);
}

.badge-medium {
    background: rgba(255, 152, 0, 0.12);
    color: #ff9800;
}

.badge-hard {
    background: rgba(255, 82, 82, 0.12);
    color: var(--danger);
}

.quiz-card-more {
    justify-content: center;
    text-align: center;
    border-style: dashed;
    background: linear-gradient(160deg, rgba(255, 215, 0, 0.06), var(--card));
}

.quiz-card-more:hover {
    border-color: rgba(255, 215, 0, 0.35);
}

.quiz-more-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: rgba(255, 215, 0, 0.1);
    color: var(--primary);
    display: grid;
    place-items: center;
    border: 1px solid rgba(255, 215, 0, 0.25);
}

.quiz-card-more h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.quiz-card-more .quiz-desc {
    margin-bottom: 8px;
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    background: var(--card);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.feature-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(255, 215, 0, 0.08);
    color: var(--primary);
    display: grid;
    place-items: center;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.55;
}

/* Steps */
.steps-section {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.step-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.step-num {
    display: inline-block;
    font-size: 12px;
    font-weight: 800;
    color: var(--primary);
    background: rgba(255, 215, 0, 0.1);
    padding: 4px 10px;
    border-radius: 999px;
    margin-bottom: 14px;
}

.step-card h3 {
    font-size: 17px;
    margin-bottom: 8px;
}

.step-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.55;
}

.cta-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    padding: 28px 32px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.12), rgba(255, 215, 0, 0.04));
    border: 1px solid rgba(255, 215, 0, 0.22);
}

.cta-banner h3 {
    font-size: 1.25rem;
    margin-bottom: 6px;
}

.cta-banner p {
    color: var(--text-muted);
    font-size: 14px;
}

.cta-actions {
    flex-shrink: 0;
}

/* Footer */
.site-footer {
    padding: 48px 0 24px;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}

.footer-brand p {
    color: var(--text-dim);
    font-size: 13px;
    margin-top: 14px;
    max-width: 280px;
    line-height: 1.6;
}

.footer-links h4 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.footer-links a {
    display: block;
    color: var(--text-dim);
    font-size: 14px;
    margin-bottom: 10px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 13px;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-visual {
        order: -1;
    }

    .phone-mockup {
        width: min(100%, 280px);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .site-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        padding: 12px 16px 16px;
    }

    .site-nav.open {
        display: flex;
    }

    .site-nav a {
        padding: 12px 8px;
        border-bottom: 1px solid var(--border);
    }

    .header-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: 32px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .cta-banner {
        flex-direction: column;
        align-items: flex-start;
    }

    .cta-banner .btn {
        width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .quiz-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        gap: 16px;
    }

    .stat {
        flex: 1 1 40%;
    }
}