/* ============================================================
   GradeOneView Landing Page
   ============================================================ */

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2035;
    --bg-card-hover: #1f2847;
    --text-primary: #f0f4ff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #3b82f6, #06b6d4);
    --border-color: rgba(148, 163, 184, 0.1);
    --glow-blue: rgba(59, 130, 246, 0.15);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* ---- Navigation ---- */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tm {
    font-size: 0.5em;
    vertical-align: super;
    opacity: 0.7;
    -webkit-text-fill-color: var(--accent-cyan);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
}

/* ---- Hero ---- */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 8rem 2rem 4rem;
}

.hero-inner {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 100px;
    border: 1px solid rgba(59, 130, 246, 0.3);
    background: rgba(59, 130, 246, 0.08);
    color: var(--accent-cyan);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

/* ---- Buttons ---- */

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.8rem 1.75rem;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.35);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border-color: rgba(148, 163, 184, 0.2);
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: 1.05rem;
}

/* ---- Features ---- */

.features {
    padding: 6rem 2rem;
}

.features-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.features-inner h2 {
    text-align: center;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    margin-bottom: 3.5rem;
    letter-spacing: -0.01em;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(59, 130, 246, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    color: var(--accent-cyan);
}

.feature-icon svg {
    width: 22px;
    height: 22px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
}

/* ---- Trust ---- */

.trust {
    padding: 6rem 2rem;
    background: var(--bg-secondary);
}

.trust-inner {
    max-width: 800px;
    margin: 0 auto;
}

.trust-content {
    text-align: center;
}

.trust-content h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.trust-content > p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: 100px;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.15);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.trust-badge svg {
    color: var(--accent-cyan);
    flex-shrink: 0;
}

/* ---- CTA Section ---- */

.cta-section {
    padding: 6rem 2rem;
    text-align: center;
}

.cta-inner {
    max-width: 640px;
    margin: 0 auto;
}

.cta-inner h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    margin-bottom: 1rem;
}

.cta-inner p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

/* ---- Footer ---- */

.footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.footer-tagline {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition);
}

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

.footer-copy {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
    .nav-inner {
        padding: 1rem 1.25rem;
    }

    .hero {
        padding: 7rem 1.25rem 3rem;
    }

    .features, .trust, .cta-section {
        padding: 4rem 1.25rem;
    }

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

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .trust-badges {
        flex-direction: column;
        align-items: center;
    }
}