:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --success: #2ecc71;
    --warning: #f1c40f;
    --danger: #e74c3c;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;

    /* Tema Oscuro (Defecto) */
    --bg-app: #121212;
    --card-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #e0e0e0;
    --text-muted: #b0b0b0;
    --nav-bg: rgba(18, 18, 18, 0.8);
    --btn-text: #ffffff;
    --modal-overlay: rgba(0, 0, 0, 0.85);
    --modal-bg: #1e1e1e;
    --input-bg: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] {
    --bg-app: #f8f9fa;
    --card-bg: rgba(0, 0, 0, 0.03);
    --glass-border: rgba(0, 0, 0, 0.08);
    --text-main: #2c3e50;
    --text-muted: #6c757d;
    --nav-bg: rgba(248, 249, 250, 0.8);
    --btn-text: #121212;
    --modal-overlay: rgba(0, 0, 0, 0.4);
    --modal-bg: #ffffff;
    --input-bg: #f1f3f5;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

h1,
h2,
h3,
h4 {
    color: var(--text-main);
    transition: color 0.3s;
}

.glass-container {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 2rem;
    transition: background 0.3s, border 0.3s;
}

/* Formularios Globales */
input,
select,
textarea {
    background: var(--input-bg);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    width: 100%;
    margin-bottom: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

select option {
    background: var(--bg-app);
    color: var(--text-main);
}

/* Estilos de botones premium */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
    color: var(--text-main);
}

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

.btn-secondary:hover {
    background: var(--card-bg);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--btn-text) !important;
}

.btn-primary:hover {
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.4rem 0.8rem !important;
    font-size: 0.8rem !important;
}

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

.btn-success {
    background: #27ae60 !important;
    color: white !important;
}

.btn-warning {
    background: var(--warning) !important;
    color: #121212 !important;
}

.btn-warning:hover {
    box-shadow: 0 4px 15px rgba(241, 196, 15, 0.4);
}

.btn-ghost {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

.p-2 {
    padding: 2rem !important;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.8rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s, border 0.3s;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #3498db, #2ecc71);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.task-item {
    display: flex;
    align-items: center;
    background: var(--card-bg);
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: transform 0.2s ease, background 0.3s;
    position: relative;
}

.task-item:hover {
    transform: scale(1.01);
    border-color: var(--primary);
}

.task-checkbox {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    margin-right: 1rem;
    cursor: pointer;
}

.task-checkbox.checked {
    background: var(--primary);
}

.task-content {
    flex-grow: 1;
}

.badge {
    padding: 0.3rem 0.6rem;
    border-radius: 5px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: bold;
}

/* Chips de fecha estilo Google */
.date-chip {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.date-chip:hover,
.date-chip.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Switch de Temas */
.theme-switch {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 4px;
    display: flex;
    gap: 4px;
}

.theme-btn {
    padding: 4px 8px;
    border-radius: 15px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.3s;
    border: none;
    background: transparent;
    color: var(--text-muted);
}

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

.edit-trigger {
    opacity: 0.7;
    transition: all 0.3s;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 5px;
}

.task-item:hover .edit-trigger {
    opacity: 1 !important;
    background: rgba(255, 255, 255, 0.1);
}

.max-w-800 {
    max-width: 800px;
    margin: 0 auto;
}

.m-0 {
    margin: 0;
}

.tool-card {
    padding: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
}

.label-text {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Modales */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-overlay);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--modal-bg);
    width: 90%;
    max-width: 500px;
    position: relative;
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Clases de Utilidad */
.flex {
    display: flex;
}

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

.flex-column {
    display: flex;
    flex-direction: column;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-end {
    display: flex;
    justify-content: flex-end;
}

.flex-gap-1 {
    gap: 1rem;
}

.flex-gap-2 {
    gap: 2rem;
}

.flex-gap-0-5 {
    gap: 0.5rem;
}

.align-center {
    align-items: center;
}

.grid-1 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.grid-sidebar {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

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

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

.w-100 {
    width: 100%;
}

.mb-1 {
    margin-bottom: 1rem;
}

.mb-1-5 {
    margin-bottom: 1.5rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.mb-3 {
    margin-bottom: 3rem;
}

.mt-1 {
    margin-top: 1rem;
}

.mt-2 {
    margin-top: 2rem;
}

.mr-1 {
    margin-right: 1rem;
}

.ml-auto {
    margin-left: auto;
}

.bold {
    font-weight: bold;
}

.text-capitalize {
    text-transform: capitalize;
}

.w-80 {
    width: 80px;
}

.w-100-px {
    width: 100px;
}

.w-120 {
    width: 120px;
}

.w-150 {
    width: 150px;
}

.primary-text {
    color: var(--primary) !important;
}

.warning-text {
    color: var(--warning) !important;
}

.danger-text {
    color: var(--danger) !important;
}

.success-text {
    color: var(--success) !important;
}

/* Tablas Administrativas */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.admin-table thead tr {
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-muted);
}

.admin-table th,
.admin-table td {
    padding: 1rem;
}

.admin-table tbody tr {
    border-bottom: 1px solid var(--glass-border);
    transition: background 0.2s;
}

.admin-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.report-container {
    padding: 2rem;
}

.audit-item {
    padding: 1rem;
    border-left: 2px solid var(--primary);
    background: var(--card-bg);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.audit-item strong {
    color: var(--primary);
    display: block;
    margin-bottom: 0.3rem;
}

.audit-item small {
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
    color: var(--primary);
}

.nav-link-warning {
    color: var(--warning) !important;
}

.main-content {
    margin-top: 100px;
    padding: 0 5%;
}

.app-logo-img {
    max-height: 40px;
    width: auto;
    display: block;
}

.main-footer {
    margin-top: 5rem;
    padding: 2rem 5%;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
}

@media print {

    nav,
    .btn,
    .glass-container:not(.report-container),
    .theme-switch {
        display: none !important;
    }

    body,
    html {
        background: white !important;
        color: black !important;
    }

    .report-container {
        background: white !important;
        border: 1px solid #ddd !important;
        color: black !important;
        box-shadow: none !important;
        backdrop-filter: none !important;
        padding: 0 !important;
        margin-bottom: 2rem !important;
    }

    h1,
    h2,
    h3,
    h4,
    strong,
    p,
    span,
    td,
    th {
        color: black !important;
    }
}