/* ==========================================================================
   IQScore - Home Page Light Theme Styles (Mobile-First Responsive)
   Includes Cognitive Skills, Calculation Breakdown, Global Stats & FAQs
   ========================================================================== */

/* HERO SECTION */
.hero {
    position: relative;
    padding: 24px 0 48px 0;
    overflow: hidden;
    width: 100%;
    max-width: 100%;
}

/* Mobile Default: 1 Column */
.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: #4f46e5;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.hero-badge::before {
    content: "✨";
}

.hero-title {
    font-size: clamp(1.85rem, 5.5vw, 3.4rem);
    font-weight: 800;
    line-height: 1.18;
    margin-bottom: 14px;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.hero-subtext {
    font-size: clamp(0.92rem, 2.5vw, 1.15rem);
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 560px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

/* HERO SCORE PREVIEW CARD */
.hero-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px 18px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    text-align: center;
    position: relative;
    transition: var(--transition-normal);
    max-width: 440px;
    margin: 0 auto;
    width: 100%;
}

.hero-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 35px -5px rgba(15, 23, 42, 0.1), 0 0 30px rgba(99, 102, 241, 0.2);
}

.hero-card-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.hero-card-top strong {
    color: var(--accent-gold);
    font-size: 1rem;
}

.hero-iq-circle {
    width: 130px;
    height: 130px;
    margin: 0 auto 18px auto;
    border-radius: 50%;
    background: var(--gradient-primary);
    padding: 5px;
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-iq-inner {
    width: 100%;
    height: 100%;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-iq-number {
    font-size: 2.6rem;
    font-weight: 900;
    line-height: 1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-iq-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.hero-iq-text {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

/* STATS SECTION */
.stats {
    padding: 36px 0;
    background: #f1f5f9;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    width: 100%;
}

.stat-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    min-width: 0;
}

.stat-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card h3 {
    font-size: clamp(1.4rem, 4vw, 1.8rem);
    font-weight: 800;
    margin-bottom: 4px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-card p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
}

/* SECTION COMMON */
.section {
    padding: 56px 0;
}

.section-alt {
    background: #f8fafc;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: clamp(1.5rem, 4.5vw, 2.4rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: clamp(0.88rem, 2.5vw, 1.05rem);
    color: var(--text-secondary);
    text-align: center;
    max-width: 640px;
    margin: 0 auto 36px auto;
    line-height: 1.55;
}

/* STEPS GRID */
.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.step-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 22px 18px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.step-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.step-number {
    width: 36px;
    height: 36px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.step-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
}

/* 5 COGNITIVE SKILLS SECTION (Inspired by iqscore.me) */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.skill-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 22px 18px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    text-align: center;
}

.skill-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.skill-icon {
    width: 52px;
    height: 52px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin: 0 auto 14px auto;
}

.skill-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.skill-text {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.skills-cta {
    text-align: center;
    margin-top: 36px;
}

/* SCORE CALCULATION BREAKDOWN (Inspired by iqscore.me) */
.calc-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.calc-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 22px 18px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.calc-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.calc-badge {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 800;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

.calc-content h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.calc-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* CHART.JS BENCHMARKS SECTION (Average IQ by Age) */
.chart-box {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    max-width: 820px;
    width: 100%;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.chart-canvas-container {
    position: relative;
    width: 100%;
    max-width: 100%;
    height: 320px;
    overflow: hidden;
}

/* AVERAGE IQ BY COUNTRY GRID (Inspired by iqscore.me) */
.country-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 980px;
    width: 100%;
    margin: 0 auto;
}

@media (max-width: 540px) {
    .country-grid {
        grid-template-columns: 1fr;
    }
}

.country-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    min-width: 0;
}

.country-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.country-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.country-flag {
    font-size: 1.4rem;
}

.country-iq {
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

/* INTERACTIVE FAQ ACCORDION (Inspired by iqscore.me) */
.faq-accordion {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.faq-item.active {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.faq-header {
    width: 100%;
    padding: 18px 20px;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    gap: 12px;
}

.faq-icon {
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--primary);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #f8fafc;
}

.faq-body-inner {
    padding: 16px 20px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
    border-top: 1px solid var(--border-color);
}

/* READY CTA BANNER (Inspired by iqscore.me) */
.ready-banner {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.06) 0%, rgba(6, 182, 212, 0.06) 100%);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: var(--radius-lg);
    padding: 44px 24px;
    text-align: center;
    max-width: 860px;
    margin: 0 auto;
}

.ready-banner h2 {
    font-size: clamp(1.6rem, 4.5vw, 2.3rem);
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.ready-banner p {
    font-size: clamp(0.92rem, 2.5vw, 1.1rem);
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.ready-banner .primary-btn {
    width: auto;
    min-width: 220px;
    display: inline-flex;
}

/* PAYMENT TRUST BADGES IN FOOTER */
.payment-badges {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 14px 20px;
    margin: 16px 0 6px 0;
}

.pay-badge {
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

/* RESPONSIVE BREAKPOINTS */
@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
    }
    .hero-buttons .primary-btn,
    .hero-buttons .secondary-btn {
        width: auto;
        min-width: 180px;
    }
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .calc-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .country-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 768px) {
    .hero {
        padding: 48px 0 72px 0;
    }
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }
    .stat-card {
        padding: 22px 14px;
    }
    .skills-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    .chart-box {
        padding: 36px 32px;
    }
    .chart-canvas-container {
        height: 360px;
    }
}

@media (min-width: 992px) {
    .hero {
        padding: 72px 0 96px 0;
    }
    .hero-grid {
        grid-template-columns: 1.2fr 0.8fr;
        gap: 48px;
    }
    .hero-card {
        max-width: none;
    }
    .steps-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 18px;
    }
    .section {
        padding: 72px 0;
    }
}