/* =============================================
   CAMPUS GT - Estilos Principales
   ============================================= */

/* Variables CSS */
:root {
    /* PALETA PERSONALIZADA - MODO CLARO */
    --color-bg: #fefefe;
    --color-text: #515151;
    --color-primary: #4089d7;
    --color-primary-dark: #2b6ab3;
    --color-secondary: #f8c00c;
    --color-secondary-dark: #d9a900;
    --color-accent: #e2a0d3;
    --color-accent-dark: #d080bb;
    
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    
    --color-sidebar: #1F2937;
    --color-sidebar-hover: #374151;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --border-radius: 10px;
    --border-radius-lg: 16px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --transition: all 0.2s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-secondary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

.text-muted { color: var(--color-gray-500); }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

/* Layout */
.layout {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: 256px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-content {
    flex: 1;
    padding: 1.5rem;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Grid */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

/* Cards */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

.btn-secondary {
    background: var(--color-secondary);
    color: white;
}

.btn-secondary:hover {
    background: var(--color-secondary-dark);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-gray-300);
    color: var(--color-text);
}

.btn-outline:hover {
    background: var(--color-gray-100);
    border-color: var(--color-gray-400);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-600);
}

.btn-ghost:hover {
    background: var(--color-gray-100);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    background: rgb(253, 253, 253);
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(64, 137, 215, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-checkbox input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--color-primary);
}

/* Input with icon */
.input-icon-wrapper {
    position: relative;
}

.input-icon-wrapper .icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
}

.input-icon-wrapper .form-input {
    padding-left: 2.5rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
}

.badge-primary {
    background: rgba(64, 137, 215, 0.15);
    color: var(--color-primary-dark);
}

.badge-secondary {
    background: rgba(248, 192, 12, 0.15);
    color: #d9a900;
}

.badge-accent {
    background: rgba(226, 160, 211, 0.2);
    color: var(--color-accent-dark);
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}

.badge-gray {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

/* Progress Bar */
.progress {
    width: 100%;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: 9999px;
    transition: width 0.3s ease;
}

.progress-bar.secondary { background: var(--color-secondary); }
.progress-bar.accent { background: var(--color-accent); }
.progress-bar.success { background: var(--color-success); }

/* Stats Card */
.stats-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.stats-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.stats-icon.blue { background: rgba(64, 137, 215, 0.15); color: var(--color-primary); }
.stats-icon.pink { background: rgba(226, 160, 211, 0.2); color: var(--color-accent); }
.stats-icon.yellow { background: rgba(248, 192, 12, 0.15); color: var(--color-secondary); }
.stats-icon.gray { background: var(--color-gray-100); color: var(--color-gray-600); }
.stats-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--color-success); }

.stats-content h3 {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stats-content p {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

/* Course Card */
.course-card {
    overflow: hidden;
    padding: 0;
}

.course-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background: var(--color-gray-200);
}

.course-content {
    padding: 1rem;
}

.course-category {
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.course-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-instructor {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    margin-bottom: 0.75rem;
}

.course-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    margin-top: 0.75rem;
}

/* Task Item */
.task-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.task-item:hover {
    border-color: var(--color-gray-300);
    background: var(--color-gray-50);
}

.task-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-300);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
    margin-top: 2px;
}

.task-checkbox:hover {
    border-color: var(--color-primary);
}

.task-checkbox.completed {
    background: var(--color-success);
    border-color: var(--color-success);
}

.task-content {
    flex: 1;
}

.task-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

.task-priority {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.task-priority.alta { background: var(--color-danger); }
.task-priority.media { background: var(--color-warning); }
.task-priority.baja { background: var(--color-success); }

/* Tabs */
.tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 1px solid var(--color-gray-200);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-500);
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.tab:hover {
    color: var(--color-text);
}

.tab.active {
    color: var(--color-primary);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
}

.tab-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    font-size: 0.75rem;
    background: var(--color-gray-100);
    border-radius: 9999px;
    margin-left: 0.5rem;
}

.tab.active .tab-count {
    background: rgba(64, 137, 215, 0.15);
    color: var(--color-primary);
}

/* Accordion */
.accordion-item {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: white;
    border: none;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: left;
    transition: var(--transition);
}

.accordion-header:hover {
    background: var(--color-gray-50);
}

.accordion-icon {
    transition: transform 0.2s ease;
}

.accordion-item.open .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    padding: 0 1rem 1rem;
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    line-height: 1.6;
    display: none;
}

.accordion-item.open .accordion-content {
    display: block;
}

/* Avatar */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-gray-200);
}

.avatar-sm { width: 32px; height: 32px; }
.avatar-lg { width: 64px; height: 64px; }
.avatar-xl { width: 96px; height: 96px; }

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-info {
    background: rgba(64, 137, 215, 0.1);
    color: var(--color-primary);
    border: 1px solid rgba(64, 137, 215, 0.2);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
}

.empty-state-icon {
    font-size: 3rem;
    color: var(--color-gray-300);
    margin-bottom: 1rem;
}

.empty-state h3 {
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--color-gray-500);
    margin-bottom: 1.5rem;
}

/* Divider */
.divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: 1.5rem 0;
}

/* Spacing utilities */
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }

/* Responsive */
@media (max-width: 1024px) {
    .main-content {
        margin-left: 0;
    }
    
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .page-content {
        padding: 1rem;
    }
    
    .tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
    }
    
    .tab {
        white-space: nowrap;
    }
}