/* ==========================================================================
   GLOWTASK DESIGN SYSTEM & THEME
   Premium, Responsive, Glassmorphic Dashboard Stylesheet
   ========================================================================== */

:root {
    /* Paleta de Colores (Estilo Dark Slate & Indigo) */
    --bg-base: #0b0f19;
    --bg-surface: #111827;
    --bg-card: rgba(31, 41, 55, 0.45);
    
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-rgb: 99, 102, 241;
    
    --success: #10b981;
    --success-rgb: 16, 185, 129;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(17, 24, 39, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    
    --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-round: 50%;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   ESTILOS GENERALES
   ========================================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
}

button, input, select, textarea {
    font-family: inherit;
    color: inherit;
    outline: none;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   COMPONENTES CORE DE LA APP
   ========================================================================== */

/* Loader Inicial */
.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-base);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity var(--transition-smooth);
}

.loader-content {
    text-align: center;
}

.glow-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(99, 102, 241, 0.15);
    border-radius: 50%;
    border-top-color: var(--accent);
    animation: spin 1s infinite linear;
    margin: 0 auto 20px;
    box-shadow: var(--shadow-glow);
}

.loader-content h2 {
    font-size: 2rem;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.loader-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hidden {
    display: none !important;
}

.opacity-0 {
    opacity: 0;
    pointer-events: none;
}

/* Notificaciones Toast */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
    max-width: 350px;
    width: 90%;
}

.toast {
    background: rgba(17, 24, 39, 0.85);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    padding: 16px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    pointer-events: auto;
    animation: slideInRight var(--transition-fast) forwards;
    transition: all var(--transition-fast);
}

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

.toast i {
    font-size: 1.25rem;
}
.toast-success i { color: var(--success); }
.toast-error i { color: var(--danger); }
.toast-info i { color: var(--info); }

.toast-message {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Botones Comunes */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}
.btn-secondary {
    background-color: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}
.btn-danger {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}
.btn-danger:hover {
    background-color: var(--danger);
    color: white;
}

/* ==========================================================================
   PANTALLA DE AUTENTICACIÓN
   ========================================================================== */

.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
}

.auth-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    width: 100%;
    max-width: 440px;
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: scaleUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-logo {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input, 
.form-group select, 
.form-group textarea {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    background-color: rgba(255, 255, 255, 0.07);
}

.auth-footer {
    margin-top: 25px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.auth-link {
    color: var(--accent);
    font-weight: 600;
    cursor: pointer;
}
.auth-link:hover {
    text-decoration: underline;
}

/* ==========================================================================
   ESTRUCTURA DE NAVEGACIÓN Y PANEL PRINCIPAL (DASHBOARD)
   ========================================================================== */

.app-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

/* Sidebar Estilo Glassmorphism */
.sidebar {
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 40px;
    background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.menu-item:hover {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.menu-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
    box-shadow: inset 3px 0 0 var(--accent);
}

.menu-item i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

/* Sidebar Footer (Usuario) */
.user-profile-widget {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-round);
    background: linear-gradient(135deg, var(--accent) 0%, var(--info) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: var(--shadow-sm);
}

.user-info {
    flex-grow: 1;
    min-width: 0;
}

.username-display {
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email-display {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-logout {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}
.btn-logout:hover {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
}

/* Main Content Area */
.main-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
}

.app-header {
    background-color: rgba(11, 15, 25, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 90;
}

.page-title-display h1 {
    font-size: 1.5rem;
    color: white;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.main-content {
    padding: 30px;
    flex-grow: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Bottom Nav para Móviles (Hidden by default) */
.mobile-bottom-nav {
    display: none;
}

/* ==========================================================================
   VISTA: CUADRO DE MANDO (DASHBOARD) & HOY
   ========================================================================== */

/* Estadísticas de Tareas */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: transform var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.02);
}

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

.stat-icon-pending { background-color: rgba(99, 102, 241, 0.15); color: var(--accent); }
.stat-icon-today { background-color: rgba(6, 182, 212, 0.15); color: var(--info); }
.stat-icon-completed { background-color: rgba(16, 185, 129, 0.15); color: var(--success); }

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Contenedor de Tareas y Filtro Lateral */
.tasks-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
}

.tasks-main-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Caja de Proyectos Filtros (Lateral) */
.projects-filter-panel {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.panel-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-header-row h3 {
    font-size: 1.1rem;
    color: white;
}

.btn-add-mini {
    background: transparent;
    border: none;
    color: var(--accent);
    cursor: pointer;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}
.btn-add-mini:hover {
    transform: scale(1.1);
}

.projects-list-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 350px;
    overflow-y: auto;
}

.project-filter-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.project-filter-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.project-filter-item.active {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
    font-weight: 600;
}

.project-label-box {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.color-indicator {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-round);
    flex-shrink: 0;
}

.project-name-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-task-badge {
    background-color: rgba(255, 255, 255, 0.06);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Controles de CRUD en Proyectos */
.project-actions {
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    gap: 6px;
}
.project-filter-item:hover .project-actions {
    opacity: 1;
}

.project-actions button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.75rem;
}
.project-actions button:hover {
    color: var(--text-primary);
}
.project-actions button.btn-del-proj:hover {
    color: var(--danger);
}

/* ==========================================================================
   VISTA: TAREAS (LISTA DE TAREAS)
   ========================================================================== */

.tasks-list-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.no-tasks-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
}

.no-tasks-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--text-muted);
}

.no-tasks-state h4 {
    font-size: 1.2rem;
    color: white;
    margin-bottom: 6px;
}

/* Tarjeta de Tarea */
.task-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    transition: all var(--transition-fast);
    animation: fadeIn var(--transition-fast) forwards;
}

.task-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateX(2px);
    background: rgba(31, 41, 55, 0.55);
}

.task-card-left {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    flex-grow: 1;
    min-width: 0;
}

/* Custom Checkbox Redondo */
.custom-checkbox-wrapper {
    margin-top: 3px;
    flex-shrink: 0;
}

.custom-checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border: 2px solid var(--text-muted);
    border-radius: var(--radius-round);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.custom-checkbox:hover {
    border-color: var(--accent);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.2);
}

.custom-checkbox:checked {
    background-color: var(--success);
    border-color: var(--success);
}

.custom-checkbox:checked::after {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: white;
    font-size: 0.75rem;
}

.task-details {
    min-width: 0;
}

.task-title {
    font-size: 1rem;
    font-weight: 600;
    color: white;
    margin-bottom: 4px;
    transition: all var(--transition-fast);
    word-break: break-word;
}

.task-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    word-break: break-word;
}

/* Tarea Completada Visual */
.task-card.completed {
    opacity: 0.6;
}

.task-card.completed .task-title {
    text-decoration: line-through;
    color: var(--text-muted);
}

/* Badges e Info de la Tarea */
.task-meta-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 6px;
}

.task-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge-project {
    background-color: rgba(255, 255, 255, 0.08);
}

.badge-due-date {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}
.badge-due-date.overdue {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}
.badge-due-date.today {
    background-color: rgba(6, 182, 212, 0.15);
    color: var(--info);
}

/* Niveles de Prioridad (Matriz) */
.badge-priority-high { background-color: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-priority-medium { background-color: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-priority-low { background-color: rgba(99, 102, 241, 0.15); color: var(--accent); }

/* Acciones en Tareas (Derecha) */
.task-card-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.btn-task-action {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.95rem;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-task-action:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-task-action.btn-del-task:hover {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
}

/* ==========================================================================
   VISTA: MATRIZ DE EISENHOWER (VISTA EN CUADRANTE)
   ========================================================================== */

.eisenhower-section {
    margin-top: 40px;
}

.eisenhower-section h2 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.eisenhower-matrix {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 20px;
}

.matrix-quadrant {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    min-height: 250px;
    display: flex;
    flex-direction: column;
}

.quadrant-q1 { border-top: 4px solid var(--danger); }
.quadrant-q2 { border-top: 4px solid var(--warning); }
.quadrant-q3 { border-top: 4px solid var(--accent); }
.quadrant-q4 { border-top: 4px solid var(--text-muted); }

.quadrant-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.quadrant-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
}
.quadrant-q1 .quadrant-title { color: var(--danger); }
.quadrant-q2 .quadrant-title { color: var(--warning); }
.quadrant-q3 .quadrant-title { color: var(--accent); }
.quadrant-q4 .quadrant-title { color: var(--text-secondary); }

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

.quadrant-tasks-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    max-height: 300px;
    flex-grow: 1;
}

/* Tarea Mini dentro de un cuadrante */
.mini-task-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mini-task-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

.mini-task-item.completed {
    opacity: 0.5;
}
.mini-task-item.completed span {
    text-decoration: line-through;
    color: var(--text-muted);
}

.mini-task-item span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
}

/* ==========================================================================
   VISTA: DIAGRAMA DE GANTT RESPONSIVO
   ========================================================================== */

.gantt-container {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    overflow-x: auto;
}

.gantt-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    min-width: 600px;
}

.gantt-nav-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.gantt-chart-table {
    display: grid;
    grid-template-columns: 200px 1fr;
    min-width: 800px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.gantt-projects-column {
    background-color: rgba(255, 255, 255, 0.01);
    border-right: 1px solid var(--border-color);
}

.gantt-timeline-column {
    position: relative;
    overflow-x: auto;
}

/* Encabezados */
.gantt-corner-header {
    height: 50px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.gantt-timeline-header {
    height: 50px;
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: repeat(7, 1fr); /* 7 días de la semana */
    text-align: center;
}

.gantt-day-header {
    border-right: 1px solid rgba(255, 255, 255, 0.03);
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-size: 0.75rem;
    padding: 4px;
}

.gantt-day-header.today-col {
    background-color: rgba(99, 102, 241, 0.06);
    border-bottom: 2px solid var(--accent);
}

.gantt-day-number {
    font-weight: 700;
    font-size: 0.95rem;
}

/* Filas */
.gantt-project-row-label {
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gantt-timeline-row {
    height: 60px;
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    position: relative;
    background-image: linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: calc(100% / 7) 100%;
}

.gantt-timeline-row.today-col-bg {
    background-color: rgba(99, 102, 241, 0.02);
}

/* Bloques de Tarea Spanning */
.gantt-task-bar {
    position: absolute;
    height: 32px;
    top: 14px;
    border-radius: var(--radius-sm);
    color: white;
    padding: 0 12px;
    display: flex;
    align-items: center;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gantt-task-bar:hover {
    transform: scale(1.02);
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.gantt-task-bar.completed {
    opacity: 0.5;
    text-decoration: line-through;
}

/* ==========================================================================
   VISTA: CALENDARIO INTERACTIVO (VISTA MENSUAL)
   ========================================================================== */

.calendar-wrapper {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.calendar-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.calendar-month-year {
    font-size: 1.3rem;
    font-weight: 700;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

/* Encabezados de días de la semana */
.calendar-weekday {
    text-align: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 8px 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Días */
.calendar-day-box {
    background-color: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    min-height: 100px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: all var(--transition-fast);
}

.calendar-day-box:hover {
    background-color: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.15);
}

.calendar-day-box.outside-month {
    opacity: 0.25;
}

.calendar-day-box.today-box {
    border-color: var(--accent);
    box-shadow: inset 0 0 0 1px var(--accent), 0 0 12px rgba(99, 102, 241, 0.1);
}

.calendar-day-number {
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-round);
}

.today-box .calendar-day-number {
    background-color: var(--accent);
    color: white;
}

.calendar-day-tasks {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
    overflow-y: auto;
}

/* Chip de tarea en calendario */
.calendar-task-chip {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    color: white;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 2px;
}

.calendar-task-chip.completed {
    text-decoration: line-through;
    opacity: 0.5;
}

/* ==========================================================================
   VISTA: CONFIGURACIÓN E INTEGRACIONES
   ========================================================================== */

.settings-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.settings-card h3 {
    font-size: 1.2rem;
    color: white;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.integration-status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.integration-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.integration-info i {
    font-size: 1.5rem;
}
.i-google-cal { color: #ea4335; }
.i-ai-bot { color: var(--success); }

.status-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
}

.status-connected { background-color: rgba(16, 185, 129, 0.15); color: var(--success); }
.status-disconnected { background-color: rgba(107, 114, 128, 0.15); color: var(--text-secondary); }

/* Clave API de IA */
.api-key-box {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.api-key-input-wrapper {
    position: relative;
    flex-grow: 1;
}

.api-key-input-wrapper input {
    width: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 12px 40px 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.875rem;
}

.btn-toggle-visibility {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
}

.api-guide-box {
    background-color: rgba(6, 182, 212, 0.04);
    border: 1px solid rgba(6, 182, 212, 0.15);
    padding: 16px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.api-guide-box h4 {
    color: var(--info);
    margin-bottom: 6px;
}

.api-guide-box code {
    background-color: rgba(0, 0, 0, 0.2);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    color: white;
}

/* ==========================================================================
   MODALES DIALOGS (Estructuras de Popup)
   ========================================================================== */

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    animation: fadeIn var(--transition-fast) forwards;
}

.modal-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-fast) forwards;
}

.modal-card-small {
    max-width: 450px;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.2rem;
    color: white;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}
.btn-close:hover {
    color: white;
}

.modal-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Segmented Control de Prioridades */
.priority-selector-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.priority-selector-col {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.selector-title {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.segmented-control {
    display: flex;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 4px;
}

.segment {
    flex-grow: 1;
    cursor: pointer;
    text-align: center;
}

.segment input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.segment-btn {
    display: block;
    padding: 8px 10px;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.segment input:checked + .segment-btn {
    background-color: var(--accent);
    color: white;
}

.segment input[value="high"]:checked + .segment-btn {
    background-color: var(--danger);
}

.segment input[value="medium"]:checked + .segment-btn {
    background-color: var(--warning);
    color: black;
}

/* Selector de Color de Proyecto */
.color-picker-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 6px;
}

.color-option {
    cursor: pointer;
    position: relative;
    display: block;
    width: 32px;
    height: 32px;
}

.color-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.color-dot {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-round);
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.color-option input:checked + .color-dot {
    border-color: white;
    transform: scale(1.15);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
}

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

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes scaleUp {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

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

/* ==========================================================================
   DISEÑO DE ADAPTACIÓN (RESPONSIVO)
   ========================================================================== */

/* Tabletas y Pantallas Medianas (max-width: 1024px) */
@media (max-width: 1024px) {
    .app-layout {
        grid-template-columns: 240px 1fr;
    }
    
    .tasks-layout {
        grid-template-columns: 1fr;
    }

    .projects-filter-panel {
        position: static;
        width: 100%;
        margin-top: 20px;
    }

    .settings-section {
        grid-template-columns: 1fr;
    }
}

/* Dispositivos Móviles (max-width: 768px) */
@media (max-width: 768px) {
    body {
        padding-bottom: 70px; /* Espacio para barra de navegación inferior */
    }

    .app-layout {
        grid-template-columns: 1fr; /* Sin barra lateral */
    }

    .sidebar {
        display: none; /* Ocultar sidebar principal */
    }

    .app-header {
        padding: 12px 20px;
    }

    .page-title-display h1 {
        font-size: 1.25rem;
    }

    .main-content {
        padding: 20px 16px;
    }

    /* Mostrar barra inferior de navegación */
    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 64px;
        background-color: rgba(17, 24, 39, 0.9);
        backdrop-filter: blur(15px);
        border-top: 1px solid var(--border-color);
        z-index: 999;
        justify-content: space-around;
        align-items: center;
        padding: 0 10px;
    }

    .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 4px;
        color: var(--text-secondary);
        font-size: 0.7rem;
        font-weight: 500;
        cursor: pointer;
        width: 60px;
        height: 100%;
        transition: all var(--transition-fast);
    }

    .mobile-nav-item i {
        font-size: 1.2rem;
    }

    .mobile-nav-item.active {
        color: var(--accent);
    }

    /* Eisenhower Grid en móvil a una columna */
    .eisenhower-matrix {
        grid-template-columns: 1fr;
    }

    /* Gantt scrollable en móviles */
    .gantt-chart-table {
        grid-template-columns: 140px 1fr;
    }

    .gantt-corner-header {
        padding: 0 8px;
    }

    /* Ajustes en Calendario */
    .calendar-weekday {
        font-size: 0.65rem;
    }

    .calendar-day-box {
        min-height: 75px;
        padding: 4px;
    }

    .calendar-day-number {
        font-size: 0.8rem;
        width: 20px;
        height: 20px;
    }

    .calendar-task-chip {
        font-size: 0.6rem;
        padding: 1px 4px;
    }

    .modal-card {
        border-radius: var(--radius-md) var(--radius-md) 0 0;
        max-height: 90vh;
        margin-top: auto;
        animation: slideUp var(--transition-fast) forwards;
    }

    .modal-backdrop {
        align-items: flex-end;
        padding: 0;
    }

    .modal-body {
        overflow-y: auto;
        padding: 20px;
    }
}