/* assets/css/style.css */

/* =========================================
   1. Global Settings & Variables
   ========================================= */
:root {
    --primary-color: #0F766E; /* Teal 700 */
    --primary-hover: #0d655e;
    --secondary-color: #F59E0B; /* Amber 500 */
    --text-dark: #1F2937;
    --text-muted: #6B7280;
    --bg-light: #F9FAFB;
}

body {
    font-family: 'Sarabun', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

h1, h2, h3, h4, h5, h6, .font-heading {
    font-family: 'Prompt', sans-serif;
}

/* =========================================
   2. Custom Utility Classes
   ========================================= */
.text-primary-custom {
    color: var(--primary-color) !important;
}

.bg-primary-custom {
    background-color: var(--primary-color) !important;
}

.btn-primary-custom {
    background-color: var(--primary-color);
    border: 1px solid var(--primary-color);
    color: white;
    transition: all 0.3s ease;
}

.btn-primary-custom:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: white;
    transform: translateY(-1px);
}

.btn-outline-primary-custom {
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    background: transparent;
}

.btn-outline-primary-custom:hover {
    background-color: var(--primary-color);
    color: white;
}

.hover-white:hover {
    color: white !important;
    text-decoration: underline !important;
}

/* =========================================
   3. Components
   ========================================= */

/* Course Card */
.course-card {
    border: none;
    border-radius: 12px;
    background: white;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.course-thumb {
    height: 180px;
    background-color: #e5e7eb;
    background-size: cover;
    background-position: center;
    position: relative;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f0fdfa 0%, #ffffff 100%);
    padding: 80px 0;
}

/* =========================================
   4. Learning Player (Specific Page)
   ========================================= */
body.player-mode {
    overflow: hidden;
    height: 100vh;
}

.player-navbar {
    height: 60px;
    background: #0F172A; /* Slate 900 */
    color: white;
    flex-shrink: 0;
    z-index: 1030;
}

.player-container {
    flex: 1;
    display: flex;
    overflow: hidden;
    height: calc(100vh - 60px);
}

.player-sidebar {
    width: 350px;
    background: #F8F9FA;
    border-left: 1px solid #dee2e6;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
}

.player-content {
    flex: 1;
    background: black;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow-y: auto;
}

.player-content.document-mode {
    background: #fff;
    display: block;
    padding: 2rem;
}

.lesson-item {
    cursor: pointer;
    border-left: 4px solid transparent;
    transition: background-color 0.2s;
}

.lesson-item:hover {
    background-color: #e9ecef;
}

.lesson-item.active {
    background-color: #e0f2f1;
    border-left-color: var(--primary-color);
    font-weight: 600;
    color: var(--primary-color);
}

/* Responsive Player */
@media (max-width: 992px) {
    .player-container {
        flex-direction: column;
        overflow-y: auto;
    }
    
    .player-content {
        height: 400px; /* Fixed height for video on mobile */
        flex-shrink: 0;
    }
    
    .player-content.document-mode {
        height: auto;
        min-height: 400px;
    }
    
    .player-sidebar {
        width: 100%;
        height: auto;
        border-left: none;
        border-top: 1px solid #dee2e6;
        flex: 1;
    }
    
    body.player-mode {
        overflow: auto; /* Allow scroll on mobile */
        height: auto;
    }
}