:root {
    /* Colors - White Label Ready */
    --bg-deep: #070A12;
    --bg-card: rgba(13, 20, 36, 0.7);
    --blue-deep: #0A1F44;
    --blue-accent: #0066FF;
    --blue-glow: #22D3EE;
    --success: #00FFB2;
    --danger: #FF3366;
    --warning: #FACC15;
    --text-primary: #F8FAFC;
    --text-secondary: rgba(248, 250, 252, 0.4);
    --border-color: rgba(255, 255, 255, 0.05);
    --border-accent: rgba(255, 255, 255, 0.1);

    /* Brand Tokens (Inherited/Dynamic) */
    --brand-primary: var(--blue-accent);
    --brand-accent: var(--success);
    --brand-glow: var(--blue-glow);

    /* Layout */
    --sidebar-width: 280px;
    --header-height: 80px;
    --radius-lg: 24px;
    --radius-md: 16px;

    /* Effects */
    --glass: blur(12px);
    --shadow-glow: 0 0 20px var(--brand-glow);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background HUD */
.tech-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 102, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

.noise-overlay {
    position: fixed;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.02;
    pointer-events: none;
    z-index: -1;
}

/* Layout Structure */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-card);
    backdrop-filter: var(--glass);
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    transition: transform 0.3s ease;
    z-index: 100;
}

.logo-area {
    margin-bottom: 3rem;
}

.logo-text {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-dot {
    width: 6px;
    height: 6px;
    background: var(--blue-accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--blue-accent);
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.nav-link.active {
    color: var(--blue-accent);
    background: rgba(0, 102, 255, 0.05);
    border: 1px solid var(--border-accent);
}

.nav-link i,
.nav-link svg {
    width: 20px;
    height: 20px;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    max-width: 1400px;
}

/* Header */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.page-title h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* Page Transitions */
main {
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.logout-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
}

/* Cards & Components */
.card {
    background: var(--bg-card);
    backdrop-filter: var(--glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all 0.3s ease;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card .value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

.stat-card .label {
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    font-weight: 800;
    color: var(--text-secondary);
}

/* Forms & Buttons */
.btn-primary {
    background: var(--brand-primary);
    color: white;
    border: none;
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.4);
}

/* Tables */
.table-container {
    overflow-x: auto;
}

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

th {
    text-align: left;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-prospecto {
    background: rgba(250, 204, 21, 0.1);
    color: var(--warning);
}

.badge-negociacion {
    background: rgba(0, 102, 255, 0.1);
    color: var(--brand-primary);
}

.badge-activo {
    background: rgba(0, 255, 178, 0.1);
    color: var(--brand-accent);
}

/* Footer Admin */
.admin-footer {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.4em;
    margin-top: 4rem;
}

.status-dot {
    width: 6px;
    height: 6px;
    background: var(--brand-accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.4;
        transform: scale(1);
    }

    50% {
        opacity: 1;
        transform: scale(1.2);
        box-shadow: 0 0 10px var(--brand-accent);
    }

    100% {
        opacity: 0.4;
        transform: scale(1);
    }
}

/* Modal System */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(7, 10, 18, 0.9);
    backdrop-filter: blur(8px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 540px;
    padding: 2.5rem;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), var(--shadow-glow);
    animation: modalIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-modal {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.2s;
}

.close-modal:hover {
    color: white;
}

/* Grid Layouts */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.full-width {
    grid-column: span 2;
}

.form-group label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.form-group input,
.form-group select,
.form-group textarea {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.85rem 1rem;
    color: white;
    outline: none;
    transition: all 0.2s;
}

.form-group input:focus {
    border-color: var(--blue-accent);
}

/* List Actions */
.action-btn {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.action-btn:hover {
    color: var(--blue-accent);
    border-color: var(--border-accent);
    background: rgba(0, 102, 255, 0.05);
}

.action-btn.delete:hover {
    color: var(--danger);
    border-color: rgba(255, 51, 102, 0.2);
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        width: 0;
        padding: 0;
        overflow: hidden;
    }

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

    .form-grid {
        grid-template-columns: 1fr;
    }

    .full-width {
        grid-column: 1;
    }
}