:root {
    --primary-color: #008cff;
    --primary-dark: #020814;
    --accent-color: #00eaff;
    --accent-hover: #00b7ff;
    --secondary-accent: #00f5d4;
    --bg-color: #03070f;
    --card-bg: #071426;
    --card-bg-soft: #0b1d35;
    --text-color: #f4f8ff;
    --text-muted: #8fb7d8;
    --border-color: #12385f;
    --danger-color: #ff4d6d;
    --success-color: #00f5d4;
    --white-metal: #f8fbff;
    --shadow-blue: rgba(0, 140, 255, 0.35);
    --shadow-cyan: rgba(0, 234, 255, 0.45);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background:
        radial-gradient(circle at top, rgba(0, 234, 255, 0.12), transparent 35%),
        radial-gradient(circle at bottom left, rgba(0, 140, 255, 0.12), transparent 40%),
        var(--bg-color);
    color: var(--text-color);
}

.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background:
        radial-gradient(circle at center top, rgba(0, 234, 255, 0.18), transparent 35%),
        linear-gradient(135deg, #020814 0%, #06152a 50%, #020814 100%);
}

.login-card {
    background: linear-gradient(180deg, rgba(11, 29, 53, 0.96), rgba(7, 20, 38, 0.98));
    padding: 40px;
    border-radius: 16px;
    border: 1px solid rgba(0, 234, 255, 0.25);
    box-shadow:
        0 0 25px rgba(0, 140, 255, 0.25),
        0 0 45px rgba(0, 234, 255, 0.12),
        0 18px 40px rgba(0, 0, 0, 0.45);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h2 {
    color: var(--white-metal);
    margin-bottom: 10px;
    letter-spacing: 1px;
    text-shadow: 0 0 12px rgba(0, 234, 255, 0.55);
}

.login-card p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
    text-align: left;
    margin-bottom: 20px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--accent-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    background-color: #050d1a;
    color: var(--text-color);
    transition: border-color 0.3s, box-shadow 0.3s, background-color 0.3s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #5f82a6;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 234, 255, 0.14), 0 0 14px rgba(0, 234, 255, 0.22);
    background-color: #071426;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

button,
.btn-link {
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s, box-shadow 0.3s;
}

button:active {
    transform: scale(0.98);
}

#btnLogin {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: #020814;
    width: 100%;
    box-shadow: 0 0 18px rgba(0, 234, 255, 0.4);
}

#btnLogin:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--secondary-accent));
    box-shadow: 0 0 25px rgba(0, 234, 255, 0.65);
}

.btn-success {
    background: linear-gradient(135deg, #00d6b8, var(--success-color));
    color: #020814;
    box-shadow: 0 0 14px rgba(0, 245, 212, 0.28);
}

.btn-success:hover {
    background: linear-gradient(135deg, #00bfa6, #00eacb);
    box-shadow: 0 0 22px rgba(0, 245, 212, 0.45);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #005cff);
    color: white;
    box-shadow: 0 0 14px rgba(0, 140, 255, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0077ff, #0048d9);
    box-shadow: 0 0 22px rgba(0, 140, 255, 0.55);
}

.mensaje-error,
.alert-error {
    background-color: rgba(255, 77, 109, 0.12);
    border: 1px solid var(--danger-color);
    color: #ff8fa3;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 14px;
    display: none;
}

.mensaje-success {
    background-color: rgba(0, 245, 212, 0.12);
    border: 1px solid var(--success-color);
    color: var(--success-color);
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 14px;
}

.navbar {
    background: linear-gradient(90deg, #020814, #071426, #020814);
    color: var(--white-metal);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 234, 255, 0.22);
    box-shadow: 0 3px 20px rgba(0, 140, 255, 0.16);
}

.nav-brand {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--white-metal);
    text-shadow: 0 0 12px rgba(0, 234, 255, 0.55);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 14px;
    color: var(--text-muted);
}

.btn-logout {
    color: #ff8fa3;
    text-decoration: none;
    font-weight: 700;
    border: 1px solid #ff4d6d;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background 0.3s, color 0.3s, box-shadow 0.3s;
}

.btn-logout:hover {
    background: #ff4d6d;
    color: white;
    box-shadow: 0 0 15px rgba(255, 77, 109, 0.45);
}

.dashboard-layout {
    display: flex;
    margin-top: 60px;
    min-height: calc(100vh - 60px);
}

.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #020814, #06152a 55%, #020814);
    position: fixed;
    top: 60px;
    left: 0;
    height: calc(100vh - 60px);
    padding-top: 20px;
    border-right: 1px solid rgba(0, 234, 255, 0.16);
    box-shadow: 6px 0 25px rgba(0, 0, 0, 0.25);
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    display: block;
    color: #8fb7d8;
    padding: 15px 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border-left: 4px solid transparent;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    color: var(--white-metal);
    background: linear-gradient(90deg, rgba(0, 234, 255, 0.16), rgba(0, 140, 255, 0.06));
    border-left-color: var(--accent-color);
    text-shadow: 0 0 10px rgba(0, 234, 255, 0.45);
}

.content-wrapper {
    flex-grow: 1;
    margin-left: 260px;
    padding: 40px;
    background:
        radial-gradient(circle at top right, rgba(0, 234, 255, 0.08), transparent 35%),
        radial-gradient(circle at bottom left, rgba(0, 140, 255, 0.08), transparent 35%),
        var(--bg-color);
}

.module-header {
    margin-bottom: 30px;
}

.module-header h2 {
    color: var(--white-metal);
    margin-bottom: 5px;
    text-shadow: 0 0 10px rgba(0, 234, 255, 0.35);
}

.module-header p {
    color: var(--text-muted);
    font-size: 15px;
}

.module-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    align-items: start;
}

.wide-grid {
    grid-template-columns: 2fr 1fr;
}

.card {
    background: linear-gradient(180deg, rgba(11, 29, 53, 0.96), rgba(7, 20, 38, 0.98));
    padding: 25px;
    border-radius: 14px;
    border: 1px solid rgba(0, 234, 255, 0.18);
    box-shadow:
        0 0 20px rgba(0, 140, 255, 0.12),
        0 12px 28px rgba(0, 0, 0, 0.28);
    margin-bottom: 25px;
}

.card h3 {
    margin-bottom: 20px;
    color: var(--white-metal);
    font-size: 18px;
    border-bottom: 1px solid rgba(0, 234, 255, 0.18);
    padding-bottom: 10px;
    text-shadow: 0 0 8px rgba(0, 234, 255, 0.32);
}

.table-card {
    padding: 20px;
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
    color: var(--text-color);
}

.table th,
.table td {
    padding: 12px 15px;
    border-bottom: 1px solid rgba(0, 234, 255, 0.14);
}

.table th {
    background: linear-gradient(90deg, rgba(0, 140, 255, 0.18), rgba(0, 234, 255, 0.08));
    color: var(--accent-color);
    font-weight: 700;
}

.table tbody tr:hover {
    background-color: rgba(0, 234, 255, 0.07);
}

.chart-canvas-wrapper {
    position: relative;
    width: 100%;
    height: 350px;
}

.stats-summary-box {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mini-card {
    text-align: center;
    padding: 30px 20px;
    background: linear-gradient(180deg, rgba(8, 25, 48, 0.98), rgba(5, 13, 26, 0.98));
    border: 1px solid rgba(0, 234, 255, 0.2);
    box-shadow: 0 0 20px rgba(0, 140, 255, 0.12);
}

.mini-card h4 {
    color: var(--text-muted);
    font-size: 14px;
    text-transform: uppercase;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

.kpi-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--white-metal);
    text-shadow:
        0 0 10px rgba(0, 234, 255, 0.6),
        0 0 20px rgba(0, 140, 255, 0.35);
}

@media (max-width: 900px) {
    .dashboard-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
        top: 0;
    }

    .content-wrapper {
        margin-left: 0;
        padding: 20px;
    }

    .module-grid,
    .wide-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}