/* Variables de diseño */
:root {
    --primary: #2c3e50;
    --secondary: #34495e;
    --accent: #3498db;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --light: #ecf0f1;
    --lighter: #f8f9fa;
    --dark: #2c3e50;
    --text: #2c3e50;
    --text-light: #7f8c8d;
    --border: #dfe6e9;
    --shadow: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-hover: 0 4px 8px rgba(0,0,0,0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset y base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1rem;
}

h1 { font-size: 2rem; letter-spacing: -0.02em; }
h2 { font-size: 1.5rem; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }

/* Header minimalista */
.header {
    background: #ffffff;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-img {
    height: 40px;
    width: auto;
}

.header h1 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--lighter);
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Botones aesthetic */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    background: var(--primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

.btn:active {
    transform: translateY(0);
}

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

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

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

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

.btn-ghost:hover {
    background: var(--lighter);
    border-color: var(--primary);
}

/* Cards sin bordes redondeados */
.card {
    background: white;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

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

/* Métricas minimalistas */
.metric-card {
    background: white;
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--accent);
}

.metric-card.success::before { background: var(--success); }
.metric-card.warning::before { background: var(--warning); }
.metric-card.danger::before { background: var(--danger); }

.metric-value {
    font-size: 2rem;
    font-weight: 300;
    color: var(--primary);
    letter-spacing: -0.02em;
}

.metric-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.metric-change {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    margin-top: 0.5rem;
    padding: 0.25rem 0.5rem;
    background: var(--lighter);
    color: var(--text-light);
}

.metric-change.positive {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success);
}

.metric-change.negative {
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger);
}

/* Tablas minimalistas */
.table-container {
    overflow-x: auto;
    background: white;
    border: 1px solid var(--border);
}

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

thead {
    background: var(--lighter);
    border-bottom: 2px solid var(--border);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

tr:hover {
    background: var(--lighter);
}

tr:last-child td {
    border-bottom: none;
}

/* Navegación inferior aesthetic */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-around;
    padding: 0;
    z-index: 1000;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 0;
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.75rem;
    transition: var(--transition);
    position: relative;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.nav-item.active::before,
.nav-item:hover::before {
    transform: scaleX(1);
}

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

.nav-item-icon {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

/* Formularios aesthetic */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border);
    font-size: 0.875rem;
    background: white;
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

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

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Badges minimalistas */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.025em;
    border: 1px solid;
}

.badge-primary {
    background: rgba(52, 152, 219, 0.1);
    color: var(--accent);
    border-color: rgba(52, 152, 219, 0.2);
}

.badge-success {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success);
    border-color: rgba(39, 174, 96, 0.2);
}

.badge-warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning);
    border-color: rgba(243, 156, 18, 0.2);
}

.badge-danger {
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger);
    border-color: rgba(231, 76, 60, 0.2);
}

/* Loading states */
.skeleton {
    background: linear-gradient(90deg, var(--lighter) 25%, var(--light) 50%, var(--lighter) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Utility classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-light); }
.text-small { font-size: 0.875rem; }
.text-tiny { font-size: 0.75rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header {
        padding: 1rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .hide-mobile {
        display: none;
    }
}