/**
 * Sistema de Gestión de Candidatos - Estilos principales
 */

:root {
    /* Colors - Base */
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-400: #818cf8;
    --secondary-500: #d946ef;
    --success-500: #10b981;
    --warning-500: #f59e0b;
    --danger-500: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Dark Theme (default) */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --bg-input: #0f172a;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
    --header-bg: rgba(15, 23, 42, 0.9);
    --scrollbar-track: #0f172a;
    --scrollbar-thumb: #4b5563;

    /* Sizing */
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --sidebar-width: 280px;
    --header-height: 70px;
}

/* Light Theme */
body.light-theme {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-input: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-glow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --header-bg: rgba(255, 255, 255, 0.95);
    --scrollbar-track: #f1f5f9;
    --scrollbar-thumb: #cbd5e1;
}

/* Light theme specific overrides */
body.light-theme .sidebar {
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
}

body.light-theme .nav-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(217, 70, 239, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.2);
}

body.light-theme .header {
    background: var(--header-bg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

body.light-theme .card {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

body.light-theme .card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

body.light-theme .table th {
    background: rgba(0, 0, 0, 0.02);
}

body.light-theme .btn-secondary {
    background: #f1f5f9;
    border-color: #e2e8f0;
}

body.light-theme .btn-secondary:hover:not(:disabled) {
    background: #e2e8f0;
}

body.light-theme .tag {
    background: var(--primary-500);
}

body.light-theme .stat-card {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

body.light-theme .login-card,
body.light-theme .public-form-card {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* Theme Toggle Button */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    transition: all var(--transition-fast);
    margin-right: var(--spacing-md);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    color: var(--warning-500);
    border-color: var(--warning-500);
}

/* Theme toggle icons - show only one at a time */
.theme-toggle .fa-sun {
    display: none !important;
}

.theme-toggle .fa-moon {
    display: inline-block !important;
}

body.light-theme .theme-toggle .fa-sun {
    display: inline-block !important;
}

body.light-theme .theme-toggle .fa-moon {
    display: none !important;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-500);
}

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

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.app-container {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin-left 0.3s ease;
}

.page-content {
    padding: var(--spacing-xl);
    padding-top: calc(var(--header-height) + var(--spacing-xl));
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
    border-right: 1px solid var(--border-color);
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.sidebar-logo {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--spacing-xl);
}

.nav-section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
    cursor: pointer;
}

.nav-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(217, 70, 239, 0.1));
    color: var(--primary-400);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.nav-item i {
    width: 24px;
    font-size: 1.125rem;
    text-align: center;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    height: var(--header-height);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-lg);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

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

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

.card-body {
    padding: var(--spacing-lg);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.primary {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-400);
}

.stat-icon.success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-500);
}

.stat-icon.warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-500);
}

.stat-icon.danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-500);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

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

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

.form-label .required {
    color: var(--danger-500);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

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

select.form-control {
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.input-with-importance {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.input-with-importance .form-control {
    flex: 1;
}

.importance-select {
    min-width: 180px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    margin-bottom: var(--spacing-sm);
}

.form-check input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-500);
    cursor: pointer;
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.form-error {
    font-size: 0.8125rem;
    color: var(--danger-500);
    margin-top: var(--spacing-xs);
}

/* Tags */
.tags-input-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    min-height: 48px;
}

.tag {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-600);
    border-radius: 4px;
    font-size: 0.8125rem;
    color: white;
}

.tag-remove {
    cursor: pointer;
    opacity: 0.7;
}

.tag-remove:hover {
    opacity: 1;
}

.tags-input {
    flex: 1;
    min-width: 100px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    outline: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-card-hover);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-500), #059669);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-500), #dc2626);
    color: white;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.8125rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
}

/* Tables */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: rgba(0, 0, 0, 0.2);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--bg-card-hover);
}

.table-actions {
    display: flex;
    gap: var(--spacing-xs);
}

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

.badge-primary {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-400);
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-500);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-500);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-500);
}

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

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success-500);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger-500);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--warning-500);
}

.alert-info {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--primary-400);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

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

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius);
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* Dropzone */
.dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--primary-500);
    background: rgba(99, 102, 241, 0.05);
}

.dropzone-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.dropzone-text {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* Progress */
.progress {
    height: 8px;
    background: var(--bg-input);
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
    border-radius: 9999px;
    transition: width 0.3s ease;
}

/* Tabs */
.tabs {
    display: flex;
    gap: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.tab {
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    font-weight: 500;
}

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

.tab.active {
    color: var(--primary-400);
    border-bottom-color: var(--primary-500);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Ranking */
.ranking-grid {
    display: grid;
    gap: var(--spacing-md);
}

.ranking-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.ranking-card:hover {
    border-color: var(--primary-500);
    box-shadow: var(--shadow-glow);
}

.ranking-position {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.ranking-position.gold {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: white;
}

.ranking-position.silver {
    background: linear-gradient(135deg, #9ca3af, #6b7280);
    color: white;
}

.ranking-position.bronze {
    background: linear-gradient(135deg, #d97706, #b45309);
    color: white;
}

.ranking-info {
    flex: 1;
}

.ranking-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.ranking-percentage {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-400);
}

/* Login */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    padding: var(--spacing-xl);
}

.login-container {
    width: 100%;
    max-width: 440px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-glow);
}

.login-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 2rem;
    color: white;
}

.login-form .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

/* Public Form */
.public-form-page {
    min-height: 100vh;
    background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
    padding: var(--spacing-xl) var(--spacing-md);
}

.public-form-header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    max-width: 800px;
    margin: 0 auto;
}

.public-form-logo {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 2.5rem;
    color: white;
}

.public-form-container {
    max-width: 900px;
    margin: 0 auto;
}

.public-form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
}

.public-form-section {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-400);
}

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

/* Tablet landscape and smaller (1024px and below) */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 260px;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        z-index: 1001;
        transition: transform 0.3s ease;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .header {
        left: 0;
    }

    /* Overlay when sidebar is open */
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1000;
    }

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

    /* Show hamburger menu */
    .sidebar-toggle {
        display: flex !important;
    }

    /* Table responsive */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .table th,
    .table td {
        white-space: nowrap;
        min-width: 100px;
    }

    /* Modal adjustments */
    .modal {
        max-width: 95%;
        margin: var(--spacing-md);
    }
}

/* Tablet portrait (768px and below) */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
    }

    .page-content {
        padding: var(--spacing-md);
        padding-top: calc(var(--header-height) + var(--spacing-md));
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    /* Header adjustments */
    .header {
        padding: 0 var(--spacing-md);
    }

    .page-title {
        font-size: 1rem;
        max-width: 200px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .header-right {
        gap: var(--spacing-sm);
    }

    .user-info {
        display: none;
    }

    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }

    /* Cards */
    .card-header {
        padding: var(--spacing-md);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

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

    .card-body {
        padding: var(--spacing-md);
    }

    /* Stat cards */
    .stat-card {
        padding: var(--spacing-md);
    }

    .stat-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    /* Buttons */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }

    .btn-lg {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    /* Table actions */
    .table-actions {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .table-actions .btn {
        width: 100%;
    }

    /* Tabs */
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 0;
    }

    .tab {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
        flex-shrink: 0;
    }

    /* Ranking cards */
    .ranking-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .ranking-info {
        width: 100%;
    }

    /* Headings */
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    h4 {
        font-size: 1.125rem;
    }

    /* Login adjustments */
    .login-card {
        padding: var(--spacing-lg);
    }

    .login-logo-icon {
        width: 64px;
        height: 64px;
        font-size: 1.5rem;
    }

    /* Public form */
    .public-form-section {
        padding: var(--spacing-md);
    }

    .section-title {
        font-size: 1rem;
    }

    .public-form-logo {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .public-form-header h1 {
        font-size: 1.5rem;
    }

    /* Dropzone */
    .dropzone {
        padding: var(--spacing-lg);
    }

    .dropzone-icon {
        font-size: 2rem;
    }

    /* Modal */
    .modal-overlay {
        padding: var(--spacing-sm);
        align-items: flex-end;
    }

    .modal {
        max-width: 100%;
        max-height: 85vh;
        border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }

    /* Alerts */
    .alert {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
    :root {
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
    }

    .container {
        padding: 0;
    }

    /* Forms */
    .form-control {
        font-size: 16px;
        /* Prevent iOS zoom */
        padding: var(--spacing-sm) var(--spacing-md);
    }

    select.form-control {
        padding-right: var(--spacing-xl);
    }

    /* Buttons full width on mobile */
    .form-actions {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .form-actions .btn {
        width: 100%;
    }

    /* Header */
    .page-title {
        max-width: 150px;
        font-size: 0.9rem;
    }

    .sidebar-toggle {
        width: 36px;
        height: 36px;
    }

    /* Cards more compact */
    .card {
        border-radius: var(--border-radius);
    }

    .card-header,
    .card-body {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    /* Stats even more compact */
    .stat-card {
        padding: var(--spacing-sm) var(--spacing-md);
        gap: var(--spacing-md);
    }

    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    /* Table: card view for very small screens */
    .table thead {
        display: none;
    }

    .table tbody tr {
        display: block;
        margin-bottom: var(--spacing-md);
        background: var(--bg-card);
        border-radius: var(--border-radius);
        padding: var(--spacing-sm);
        border: 1px solid var(--border-color);
    }

    .table tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-xs) var(--spacing-sm);
        border-bottom: 1px solid var(--border-color);
        text-align: right;
    }

    .table tbody td:last-child {
        border-bottom: none;
    }

    .table tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-muted);
        text-align: left;
        margin-right: var(--spacing-md);
    }

    .table-actions {
        width: 100%;
        justify-content: flex-end;
    }

    /* Badges */
    .badge {
        font-size: 0.6875rem;
        padding: 0.2em 0.5em;
    }

    /* Tags */
    .tags-input-container {
        min-height: 42px;
    }

    .tag {
        font-size: 0.75rem;
        padding: 0.2rem 0.5rem;
    }

    /* Login */
    .login-page {
        padding: var(--spacing-md);
    }

    .login-card {
        padding: var(--spacing-md);
    }

    .login-logo h1 {
        font-size: 1.25rem;
    }

    /* Public form */
    .public-form-page {
        padding: var(--spacing-sm);
    }

    .public-form-header {
        padding: var(--spacing-lg) 0;
    }

    .public-form-header h1 {
        font-size: 1.25rem;
    }

    .public-form-header p {
        font-size: 0.875rem;
    }

    /* Sidebar */
    .sidebar {
        width: 85vw;
        max-width: 300px;
    }

    .sidebar-header {
        padding: var(--spacing-md);
    }

    .sidebar-logo {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .nav-item {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }

    /* Ranking */
    .ranking-position {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .ranking-name {
        font-size: 1rem;
    }

    .ranking-percentage {
        font-size: 1.25rem;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {

    /* Larger touch targets */
    .btn {
        min-height: 44px;
    }

    .nav-item {
        min-height: 48px;
    }

    .form-check input {
        width: 22px;
        height: 22px;
    }

    .form-check {
        gap: var(--spacing-md);
    }

    /* Remove hover effects that don't work well on touch */
    .card:hover {
        transform: none;
    }

    .stat-card:hover {
        transform: none;
    }

    .nav-item:hover {
        background: transparent;
    }

    .nav-item:active,
    .nav-item.active {
        background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(217, 70, 239, 0.1));
    }
}

/* Print styles */
@media print {

    .sidebar,
    .header,
    .sidebar-toggle,
    .btn,
    .modal-overlay {
        display: none !important;
    }

    .main-content {
        margin: 0 !important;
    }

    .page-content {
        padding: 0 !important;
    }

    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ============================================
   END RESPONSIVE STYLES
   ============================================ */

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track, var(--bg-primary));
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb, var(--gray-600));
    border-radius: 9999px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

/* Sidebar Toggle Button */
.sidebar-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-md);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--bg-card-hover);
}

@media (max-width: 1024px) {
    .sidebar-toggle {
        display: flex;
    }
}