/**
 * Landing page styles
 * Extends design-system.css
 */

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    padding: var(--space-16) var(--space-4);
    text-align: center;
    color: white;
    background: linear-gradient(135deg, #1e293b 0%, #2563eb 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("../img/elearning.2b03c2fe8336.webp");
    background-size: cover;
    background-position: center;
    opacity: 0.15;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: white;
}

.hero-subtitle {
    font-size: var(--text-lg);
    opacity: 0.9;
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

.hero .btn {
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   Platform Stats
   ========================================================================== */

.platform-stats {
    padding: var(--space-8) 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.stat-number {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-transform: lowercase;
}

/* ==========================================================================
   User Dashboard
   ========================================================================== */

.user-dashboard {
    padding: var(--space-12) 0;
    background: var(--color-bg);
}

.section-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--space-6);
}

.subsection-title {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--space-4);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.dashboard-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.dashboard-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    opacity: 0.1;
}

.dashboard-card-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.dashboard-card-value {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-secondary);
}

.dashboard-card-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* Progress bar */
.progress-bar {
    height: 8px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), #60a5fa);
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
}

/* No access notice */
.no-access-notice {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-10);
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.notice-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    background: var(--color-text-light);
    border-radius: var(--radius-full);
}

.notice-icon.lock-icon {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='3' y='11' width='18' height='11' rx='2' ry='2'%3E%3C/rect%3E%3Cpath d='M7 11V7a5 5 0 0 1 10 0v4'%3E%3C/path%3E%3C/svg%3E");
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='3' y='11' width='18' height='11' rx='2' ry='2'%3E%3C/rect%3E%3Cpath d='M7 11V7a5 5 0 0 1 10 0v4'%3E%3C/path%3E%3C/svg%3E");
    mask-size: 50%;
    -webkit-mask-size: 50%;
    mask-repeat: no-repeat;
    -webkit-mask-repeat: no-repeat;
    mask-position: center;
    -webkit-mask-position: center;
}

.no-access-notice h3 {
    font-size: var(--text-xl);
    color: var(--color-secondary);
    margin-bottom: var(--space-3);
}

.no-access-notice p {
    color: var(--color-text-muted);
    margin: 0;
}

/* ==========================================================================
   Features Section
   ========================================================================== */

.features-section {
    padding: var(--space-12) 0;
    background: var(--color-surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    text-align: center;
    padding: var(--space-6);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-primary), #60a5fa);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Feature icons using CSS */
.feature-icon::before {
    content: '';
    width: 32px;
    height: 32px;
    background: white;
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    -webkit-mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
}

.feature-icon-video::before {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpolygon points='5 3 19 12 5 21 5 3'%3E%3C/polygon%3E%3C/svg%3E");
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpolygon points='5 3 19 12 5 21 5 3'%3E%3C/polygon%3E%3C/svg%3E");
}

.feature-icon-transcript::before {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'%3E%3C/path%3E%3Cpolyline points='14 2 14 8 20 8'%3E%3C/polyline%3E%3Cline x1='16' y1='13' x2='8' y2='13'%3E%3C/line%3E%3Cline x1='16' y1='17' x2='8' y2='17'%3E%3C/line%3E%3Cpolyline points='10 9 9 9 8 9'%3E%3C/polyline%3E%3C/svg%3E");
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'%3E%3C/path%3E%3Cpolyline points='14 2 14 8 20 8'%3E%3C/polyline%3E%3Cline x1='16' y1='13' x2='8' y2='13'%3E%3C/line%3E%3Cline x1='16' y1='17' x2='8' y2='17'%3E%3C/line%3E%3Cpolyline points='10 9 9 9 8 9'%3E%3C/polyline%3E%3C/svg%3E");
}

.feature-icon-summary::before {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M4 19.5A2.5 2.5 0 0 1 6.5 17H20'%3E%3C/path%3E%3Cpath d='M6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15A2.5 2.5 0 0 1 6.5 2z'%3E%3C/path%3E%3C/svg%3E");
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M4 19.5A2.5 2.5 0 0 1 6.5 17H20'%3E%3C/path%3E%3Cpath d='M6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15A2.5 2.5 0 0 1 6.5 2z'%3E%3C/path%3E%3C/svg%3E");
}

.feature-icon-quiz::before {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M9 11l3 3L22 4'%3E%3C/path%3E%3Cpath d='M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11'%3E%3C/path%3E%3C/svg%3E");
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M9 11l3 3L22 4'%3E%3C/path%3E%3Cpath d='M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11'%3E%3C/path%3E%3C/svg%3E");
}

.feature-icon-chat::before {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z'%3E%3C/path%3E%3C/svg%3E");
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z'%3E%3C/path%3E%3C/svg%3E");
}

.feature-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--space-2);
}

.feature-description {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-section {
    padding: var(--space-12) 0;
    background: linear-gradient(135deg, #1e293b 0%, #2563eb 100%);
    color: white;
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: white;
}

.cta-content p {
    opacity: 0.9;
    margin-bottom: var(--space-6);
}

.cta-content .btn {
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

}

@media (max-width: 640px) {
    .hero {
        min-height: 40vh;
        padding: var(--space-10) var(--space-4);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }

    .stat-number {
        font-size: var(--text-2xl);
    }

    .feature-card {
        padding: var(--space-4);
    }

    .user-dashboard,
    .features-section,
    .cta-section {
        padding: var(--space-8) 0;
    }
}