:root {
    --bg-color: #0b0c10;
    --card-bg: #15171e;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --border-color: #272a35;
    --accent-blue: #3b82f6;
    --positive: #10b981;
    --negative: #ef4444;
    --warning: #f59e0b;
    --hover-bg: #1e212b;
    --active-bg: rgba(59, 130, 246, 0.15);
    --danger-bg: rgba(239, 68, 68, 0.15);
    --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    display: flex;
    min-height: 100vh;
    font-size: 14px;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 40px;
    letter-spacing: -0.5px;
}

.nav-links {
    list-style: none;
}

.nav-links li {
    padding: 10px 15px;
    margin-bottom: 8px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.nav-links li.active {
    background-color: var(--active-bg);
    color: var(--accent-blue);
}

/* Main Content */
.content {
    flex: 1;
    padding: 30px 40px;
    position: relative;
    overflow-y: auto;
}

.page {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--hover-bg);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.status-badge .dot {
    width: 8px;
    height: 8px;
    background-color: var(--positive);
    border-radius: 50%;
}

/* Grid Layouts */
.top-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.card h3 {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card .value {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.card .value.positive { color: var(--positive); }
.card .value.negative { color: var(--negative); }

/* Control Panel */
.control-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    grid-column: 1 / -1;
}

.btn {
    padding: 10px 15px;
    border-radius: 8px;
    border: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: background 0.2s;
}

.btn.danger {
    background-color: var(--danger-bg);
    color: var(--negative);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn.danger:hover { background-color: rgba(239, 68, 68, 0.25); }

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

.btn.outline:hover { background-color: var(--hover-bg); }

/* Radar / Indicators */
.radar-list {
    list-style: none;
    margin-top: 10px;
}

.radar-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.radar-list li:last-child { border-bottom: none; }

.indicator {
    display: flex;
    align-items: center;
    gap: 6px;
}

.led {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
}

.led.green { background-color: var(--positive); box-shadow: 0 0 5px rgba(52, 199, 89, 0.5); }
.led.red { background-color: var(--negative); box-shadow: 0 0 5px rgba(255, 59, 48, 0.5); }
.led.yellow { background-color: var(--warning); box-shadow: 0 0 5px rgba(255, 204, 0, 0.5); }

/* Table */
.table-container {
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    color: var(--text-primary);
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.05);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

th:first-child, td:first-child {
    background-color: rgba(255, 255, 255, 0.05);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    font-family: monospace;
    color: var(--text-secondary);
}
th:first-child {
    color: var(--text-primary);
    font-family: inherit;
}

td.positive { color: var(--positive); font-weight: 500; }
td.negative { color: var(--negative); font-weight: 500; }

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

/* Inputs */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.form-group input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
    outline: none;
}

.form-group input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
}

/* Login */
.login-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(11, 12, 16, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-overlay.hidden { display: none; }

.login-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    width: 320px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.login-box h2 {
    font-size: 18px;
    margin-bottom: 5px;
}

.login-box p {
    font-size: 12px;
    color: var(--text-secondary);
}

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

.btn.primary:hover { background-color: #005bb5; }

/* Segmented Controls (Apple Style) */
.segment-group {
    display: flex;
    background-color: var(--bg-color);
    border-radius: 8px;
    padding: 2px;
    border: 1px solid var(--border-color);
}

.segment-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.segment-btn.active {
    background-color: var(--card-bg);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* =========================================================================
   NUEVAS CLASES RESPONSIVAS Y MEDIA QUERIES (ADAPTACIÓN A MÓVIL/TABLET)
   ========================================================================= */

/* Estilos de Grid para Probador */
.asset-cards-grid {
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 20px; 
    margin-bottom: 30px;
}

.probador-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
    align-items: stretch;
}

.probador-left {
    grid-column: span 4;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 15px;
}

.probador-right {
    grid-column: span 2;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-row {
    display: flex;
    gap: 15px;
    align-items: end;
}

/* --- Tablets / Pantallas Medianas (< 1024px) --- */
@media (max-width: 1024px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        padding: 15px 20px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
    }
    
    .logo {
        width: 100%;
        display: flex;
        justify-content: space-between;
        margin-bottom: 0;
    }
    
    .menu-toggle {
        display: block !important;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        margin-top: 15px;
    }
    
    .nav-links.show {
        display: flex;
    }

    .stats-row {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .top-grid {
        grid-template-columns: 1fr;
    }
    
    .probador-grid {
        grid-template-columns: 1fr;
    }
    
    .probador-left {
        grid-column: span 1;
    }
    
    .probador-right {
        grid-column: span 1;
    }
}

/* --- Móviles (< 768px) --- */
@media (max-width: 768px) {
    .content {
        padding: 20px 15px;
    }

    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .form-row > div {
        width: 100%;
    }

    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin-bottom: 20px;
        border: 1px solid var(--border-color);
        border-radius: 8px;
    }

    .control-panel {
        grid-template-columns: 1fr;
    }

    /* Ocultamos las fechas largas en móvil si es necesario, o las dejamos con scroll */
    th, td {
        white-space: nowrap;
    }
}

/* --- Teléfonos Pequeños (< 480px) --- */
@media (max-width: 480px) {
    .stats-row {
        grid-template-columns: 1fr;
    }
    
    .asset-cards-grid {
        grid-template-columns: 1fr;
    }
}