/* ============================================
   STUDIE - PDF VIEWER STYLE
   ============================================ */

/* Hero Section */
.study-hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 140px 32px 80px;
    background: linear-gradient(135deg,
        var(--bg-primary) 0%,
        var(--bg-secondary) 100%
    );
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.study-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 40% 50%,
        rgba(124, 58, 237, 0.12) 0%,
        transparent 50%
    );
}

.study-hero-content {
    max-width: 1000px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid var(--accent);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 24px;
    margin-left: auto;
    margin-right: auto;
}

.badge i {
    font-size: 14px;
}

.study-hero h1 {
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--text-primary);
    line-height: 1.1;
    max-width: 100%;
}

.study-hero .subtitle {
    font-size: clamp(17px, 2vw, 21px);
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.study-meta {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    color: var(--text-secondary);
}

.meta-item i {
    color: var(--accent);
    font-size: 16px;
}

/* Study Content */
.study-content {
    padding: 80px 32px 120px;
    background: var(--bg-primary);
}

.study-container {
    max-width: 1100px;
    margin: 0 auto;
}

.study-section {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
}

.study-section h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.study-section h2 i {
    color: var(--accent);
    font-size: 24px;
}

.study-section .lead {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
}

/* Key Points */
.key-points {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 48px;
}

.key-points h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.key-points h3 i {
    color: var(--accent);
}

.points-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.point-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    transition: var(--transition-smooth);
}

.point-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
    transform: translateY(-4px);
}

.point-number {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.point-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.point-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* PDF Viewer Section */
.pdf-viewer-section {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 48px;
}

.pdf-header {
    text-align: center;
    margin-bottom: 32px;
}

.pdf-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.pdf-header h2 i {
    color: var(--accent);
}

.pdf-header p {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0;
}

.pdf-container {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.pdf-frame {
    width: 100%;
    height: 800px;
    border: none;
    display: block;
}

.pdf-placeholder {
    text-align: center;
    padding: 80px 40px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed var(--border-color);
    border-radius: 16px;
}

.placeholder-icon {
    width: 100px;
    height: 100px;
    border-radius: 24px;
    background: rgba(124, 58, 237, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.placeholder-icon i {
    font-size: 48px;
    color: var(--accent);
}

.pdf-placeholder h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.pdf-placeholder p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto 32px;
}

.coming-soon-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid var(--accent);
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
}

.coming-soon-badge i {
    animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.pdf-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: 24px;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.pdf-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 40px;
    background: rgba(124, 58, 237, 0.15);
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 12px;
    font-size: 17px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 220px;
}

.pdf-actions .btn i {
    font-size: 18px;
}

.pdf-actions .btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(124, 58, 237, 0.3);
}

/* Resources Section */
.resources-section {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
}

.resources-section h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.resources-section h3 i {
    color: var(--accent);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.resource-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.resource-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
    transform: translateX(4px);
}

.resource-card i {
    font-size: 28px;
    color: var(--accent);
    flex-shrink: 0;
}

.resource-card span {
    font-size: 15px;
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    .study-hero {
        min-height: 40vh;
        padding: 120px 24px 60px;
    }

    .study-meta {
        gap: 16px;
    }

    .meta-item {
        font-size: 14px;
    }

    .study-content {
        padding: 60px 24px 80px;
    }

    .study-section,
    .key-points,
    .pdf-viewer-section,
    .resources-section {
        padding: 28px 20px;
    }

    .pdf-frame {
        height: 600px;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }

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

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