/* =====================================================
   SIGA - Sistema Integral de Gestión Académica
   Estilos Globales v2.0 - Modern Design System
   ===================================================== */

/* =====================================================
   VARIABLES CSS - LIGHT & DARK MODE
   ===================================================== */

:root[data-theme="light"] {
    /* Colores principales - Gradiente atractivo */
    --color-primary: #667eea;
    --color-primary-dark: #5568d3;
    --color-primary-light: #e8ebf9;
    --color-secondary: #764ba2;
    
    --color-success: #34C759;
    --color-success-light: #e8f7ec;
    
    --color-warning: #ff9500;
    --color-warning-light: #fff4e5;
    
    --color-danger: #ff3b30;
    --color-danger-light: #ffe5e3;
    
    /* Fondos */
    --color-background: #f5f5f7;
    --color-surface: #ffffff;
    --color-surface-secondary: #fafafa;
    --color-border: #e5e5e7;
    
    /* Textos */
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    
    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
}

:root[data-theme="dark"] {
    --color-primary: #7c8aed;
    --color-primary-dark: #667eea;
    --color-primary-light: #2d2f4e;
    --color-secondary: #9966cc;
    
    --color-success: #32d74b;
    --color-success-light: #1e3a24;
    
    --color-warning: #ff9f0a;
    --color-warning-light: #3a2e1a;
    
    --color-danger: #ff453a;
    --color-danger-light: #3a1e1c;
    
    --color-background: #1c1c1e;
    --color-surface: #2c2c2e;
    --color-surface-secondary: #3a3a3c;
    --color-border: #48484a;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #aeaeb2;
    --color-text-tertiary: #8e8e93;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.5);
}

:root {
    /* Tipografía */
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Helvetica Neue', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 21px;
    --font-size-2xl: 28px;
    --font-size-3xl: 40px;
    
    /* Espaciado */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transiciones */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Default a light mode */
:root {
    --color-primary: #667eea;
    --color-primary-dark: #5568d3;
    --color-primary-light: #e8ebf9;
    --color-secondary: #764ba2;
    
    --color-success: #34C759;
    --color-success-light: #e8f7ec;
    
    --color-warning: #ff9500;
    --color-warning-light: #fff4e5;
    
    --color-danger: #ff3b30;
    --color-danger-light: #ffe5e3;
    
    --color-background: #f5f5f7;
    --color-surface: #ffffff;
    --color-surface-secondary: #fafafa;
    --color-border: #e5e5e7;
    
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
}

/* =====================================================
   RESET Y BASE
   ===================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-system);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

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

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

/* =====================================================
   LAYOUT
   ===================================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* =====================================================
   BOTONES
   ===================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-system);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
}

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

.btn-success:hover {
    background: #2db64d;
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background: #e5342a;
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover {
    background: var(--color-surface-secondary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =====================================================
   FORMULARIOS
   ===================================================== */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--font-size-base);
    font-family: var(--font-system);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-control::placeholder {
    color: var(--color-text-tertiary);
}

select.form-control {
    cursor: pointer;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.text-muted {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* =====================================================
   CARDS
   ===================================================== */

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

/* =====================================================
   ALERTS
   ===================================================== */

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.alert-success {
    background: var(--color-success-light);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.alert-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

.alert-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

/* =====================================================
   MODALES PERSONALIZADOS
   ===================================================== */

.siga-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity var(--transition-base);
    padding: var(--spacing-lg);
}

.siga-modal-overlay.active {
    opacity: 1;
}

.siga-modal-container {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 450px;
    width: 100%;
    text-align: center;
    transform: scale(0.9);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.siga-modal-overlay.active .siga-modal-container {
    transform: scale(1);
}

.siga-modal-icon {
    margin-bottom: var(--spacing-lg);
}

.siga-modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.siga-modal-message {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.siga-modal-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.siga-btn {
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-system);
}

.siga-btn-cancel {
    background: var(--color-surface-secondary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.siga-btn-cancel:hover {
    background: var(--color-border);
}

.siga-btn-confirm {
    color: white;
}

.siga-btn-warning {
    background: var(--color-warning);
}

.siga-btn-danger {
    background: var(--color-danger);
}

.siga-btn-success {
    background: var(--color-success);
}

.siga-btn-info {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.siga-btn-confirm:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* =====================================================
   TOAST NOTIFICATIONS
   ===================================================== */

.siga-toast {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--color-surface);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    z-index: 10000;
    transform: translateX(400px);
    transition: transform var(--transition-base);
    min-width: 300px;
    max-width: 500px;
}

.siga-toast.active {
    transform: translateX(0);
}

.siga-toast-icon {
    font-size: 24px;
}

.siga-toast-message {
    flex: 1;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.siga-toast-success {
    border-left: 4px solid var(--color-success);
}

.siga-toast-error {
    border-left: 4px solid var(--color-danger);
}

.siga-toast-warning {
    border-left: 4px solid var(--color-warning);
}

.siga-toast-info {
    border-left: 4px solid var(--color-primary);
}

/* =====================================================
   BOTÓN FLOTANTE SIDEBAR
   ===================================================== */

.sidebar-toggle-btn {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-toggle-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.sidebar-toggle-btn:active {
    transform: scale(0.95);
}

/* =====================================================
   SIDEBAR OVERLAY (Mobile)
   ===================================================== */

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* =====================================================
   TABLAS RESPONSIVAS
   ===================================================== */

@media (max-width: 768px) {
    .table-wrapper {
        overflow-x: auto;
    }
    
    table {
        min-width: 600px;
    }
}

/* =====================================================
   UTILIDADES
   ===================================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* =====================================================
   ANIMACIONES
   ===================================================== */

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-slide-up {
    animation: slideInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-fade-in {
    animation: fadeIn 0.4s ease;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }
    h3 { font-size: var(--font-size-lg); }
}