/* Variables */
:root {
    /* Colors */
    --color-primary: #00416B;
    --color-primary-dark: #003152;
    --color-primary-darker: #002a44;
    --color-secondary: #6c757d;
    --color-success: #198754;
    --color-info: #0dcaf0;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-light: #f8f9fa;
    --color-dark: #212529;
    --color-white: #ffffff;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;

    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 1rem;
    --spacing-4: 1.5rem;
    --spacing-5: 2rem;
    --spacing-6: 2.5rem;
    --spacing-8: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

/* Base Styles */
body {
    min-height: 100vh;
    overflow-x: hidden;
    background-color: var(--color-white);
}

/* Layout */
.container {
    padding-bottom: var(--spacing-8);
    min-height: 100vh;
}

/* Logo */
.logo-header {
    width: 120px;
    height: auto;
    margin-bottom: var(--spacing-4);
}

/* Typography */
.card-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2);
    color: var(--color-gray-900);
}

.card-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-3);
}

/* Buttons */
.btn {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1), inset 0 1px 0 rgba(255,255,255,0.2);
    transition: all 0.2s ease;
    border: 1px solid rgba(0,0,0,0.1);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-sm);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn:active {
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0,0,0,0.1), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-primary {
    background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-dark));
    border-color: var(--color-primary-darker);
    color: var(--color-white);
}

.btn-primary:hover {
    background: linear-gradient(to bottom, var(--color-primary-dark), var(--color-primary-darker));
    border-color: var(--color-primary-darker);
}

.btn-outline-primary {
    background: linear-gradient(to bottom, var(--color-white), var(--color-gray-100));
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline-primary:hover {
    background: linear-gradient(to bottom, var(--color-gray-100), var(--color-gray-200));
    border-color: var(--color-primary-dark);
    color: var(--color-primary-dark);
}

.btn-sm {
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-sm);
}

/* Teacher Section */
.teacher-section {
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    padding: var(--spacing-3);
    margin-left: var(--spacing-4);
    min-width: 250px;
}

.teacher-image {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.teacher-title {
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-1);
}

.teacher-name {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-2);
    color: var(--color-primary);
}

/* Sequence Items */
.sequence-item {
    padding: var(--spacing-3);
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: var(--spacing-2);
}

.sequence-item:hover {
    background: var(--color-gray-100);
}

/* Badges and Labels */
.difficulty-badge {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    margin-left: var(--spacing-2);
    font-weight: 500;
}

.pose-category {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-2);
    background-color: var(--color-gray-100);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--color-gray-700);
}

/* Benefits List */
.benefits-list {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-top: var(--spacing-2);
    padding-top: var(--spacing-2);
    border-top: 1px solid var(--color-gray-200);
}

.benefits-list div {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-1);
}

.benefits-list div::before {
    content: '✨';
    font-size: var(--font-size-base);
}

/* Print Styles */
@media print {
    .qr-code-container {
        display: block !important;
        position: absolute !important;
        top: var(--spacing-4) !important;
        right: var(--spacing-4) !important;
        width: 150px !important;
        margin: 0 !important;
        padding: var(--spacing-3) !important;
        background: var(--color-white) !important;
        z-index: 1000 !important;
        page-break-inside: avoid !important;
    }

    .card-body {
        padding-top: 160px !important;
        padding-right: 180px !important;
    }

    .sequence-details {
        page-break-before: always !important;
        border-top: 2px solid var(--color-primary) !important;
    }

    .hidden-print {
        display: none !important;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .d-flex.justify-content-between {
        flex-direction: column;
    }

    .teacher-section {
        margin-left: 0;
        margin-top: var(--spacing-4);
        width: 100%;
    }
}