:root {
    /* --- TEMA DARK (Por defecto) --- */
    --bg-main: #0f1214;
    --bg-gradient: radial-gradient(circle at top center, #1a2a3a 0%, #0f1214 80%);
    --text-main: #e0e0e0;
    --text-title: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.6);
    --card-bg: rgba(20, 25, 30, 0.85);
    --card-border: rgba(0, 210, 255, 0.3);
    --cyan-primary: #00d2ff;
    --shadow-color: rgba(0, 210, 255, 0.1);
    --input-bg: rgba(0, 0, 0, 0.3);
    --input-border: rgba(255, 255, 255, 0.15);
    --input-text: #ffffff;
    --btn-bg: rgba(0, 85, 164, 0.6);
    --btn-hover: #00d2ff;
    --table-header-bg: rgba(0, 210, 255, 0.1);
    --table-row-hover: rgba(255, 255, 255, 0.05);
    --alert-bg: rgba(0, 0, 0, 0.4);
    --pill-active-bg: #00d2ff;
    --pill-active-text: #0b0f19;
    --select-option-bg: #14191e;
    --select-option-text: #ffffff;
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f8f9fa;
    --bg-gradient: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    --text-main: #333333;
    --text-title: #1a1d21;
    --text-muted: #555555;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --cyan-primary: #00768a;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-text: #212529;
    --btn-bg: #00768a;
    --btn-hover: #005662;
    --table-header-bg: #e9ecef;
    --table-row-hover: #f1f3f5;
    --alert-bg: #f1f3f5;
    --pill-active-bg: #00768a;
    --pill-active-text: #ffffff;
    --select-option-bg: #ffffff;
    --select-option-text: #212529;
}

body {
    background-color: var(--bg-main) !important;
    background: var(--bg-gradient) !important;
    color: var(--text-main) !important;
    min-height: 100vh;
}

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

.content-wrapper h1,
.content-wrapper h2,
.content-wrapper h3,
.content-wrapper h4,
.content-wrapper h5 {
    color: var(--text-title) !important;
}

[data-theme='dark'] .content-wrapper h1,
[data-theme='dark'] .content-wrapper h2,
[data-theme='dark'] .content-wrapper h3,
[data-theme='dark'] .content-wrapper h4,
[data-theme='dark'] .content-wrapper h5 {
    text-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
}

.theme-toggle {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1000;
    cursor: pointer;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}
.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--cyan-primary);
}

.btn-back {
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    transition: color 0.2s;
    margin-bottom: 1rem;
}
.btn-back:hover {
    color: var(--cyan-primary);
}

/* --- TARJETA HUD --- */
.tech-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    box-shadow: 0 0 20px var(--shadow-color);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.tech-card:hover {
    border-color: var(--cyan-primary);
    box-shadow: 0 0 25px rgba(0, 210, 255, 0.15);
}

/* --- FORMULARIOS --- */
.form-label {
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-main);
}
.form-control, .form-select {
    background-color: var(--input-bg) !important;
    border: 1px solid var(--input-border) !important;
    color: var(--input-text) !important;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-select option {
    background-color: var(--select-option-bg) !important;
    color: var(--select-option-text) !important;
}
.form-select option[value=""] {
    display: none;
    color: var(--text-muted) !important;
    background-color: var(--select-option-bg) !important;
}
.form-control:focus, .form-select:focus {
    border-color: var(--cyan-primary) !important;
    box-shadow: 0 0 8px rgba(0, 210, 255, 0.25) !important;
    outline: none;
}
.form-control::placeholder {
    color: rgba(255, 255, 255, 0.4);
}
[data-theme='light'] .form-control::placeholder {
    color: rgba(0, 0, 0, 0.4);
}

/* --- TABLAS --- */
.table-custom {
    color: var(--text-main) !important;
    font-size: 0.85rem;
}
.table-custom th {
    background-color: var(--table-header-bg) !important;
    color: var(--text-title) !important;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    padding: 0.75rem 0.5rem !important;
    border-bottom: 2px solid var(--card-border) !important;
}
.table-custom td {
    background-color: transparent !important;
    color: var(--text-main) !important;
    padding: 0.75rem 0.5rem !important;
    border-bottom: 1px solid rgba(255,255,255,0.05) !important;
    vertical-align: middle;
}
[data-theme='light'] .table-custom td {
    border-bottom: 1px solid rgba(0,0,0,0.05) !important;
}
.table-custom tbody tr:hover td {
    background-color: var(--table-row-hover) !important;
}

/* --- PESTAÑAS (NAVS) --- */
.nav-pills-custom {
    background: rgba(0,0,0,0.2);
    padding: 6px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    margin-bottom: 2rem;
}
[data-theme='light'] .nav-pills-custom {
    background: rgba(0,0,0,0.03);
}
.nav-pills-custom .nav-link {
    color: var(--text-main);
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}
.nav-pills-custom .nav-link.active {
    background-color: var(--pill-active-bg) !important;
    color: var(--pill-active-text) !important;
    box-shadow: 0 4px 12px rgba(0, 210, 255, 0.2);
}

/* --- BOTONES --- */
.btn-action {
    background-color: var(--btn-bg) !important;
    border: 1px solid var(--cyan-primary) !important;
    color: #ffffff !important;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}
.btn-action:hover {
    background-color: var(--btn-hover) !important;
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.4);
    transform: translateY(-2px);
}
.btn-secondary-custom {
    background: rgba(255,255,255,0.05) !important;
    border: 1px solid rgba(255,255,255,0.15) !important;
    color: var(--text-main) !important;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}
.btn-secondary-custom:hover {
    background: rgba(255,255,255,0.15) !important;
}

/* --- ANÁLISIS FINANCIERO Y LÍMITES --- */
.stat-box {
    background: rgba(0,0,0,0.25);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    height: 100%;
}
.stat-box .stat-val {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--cyan-primary);
}
.stat-box .stat-lbl {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
    margin-top: 0.5rem;
}
[data-theme='light'] .stat-box .stat-lbl {
    color: rgba(0,0,0,0.6);
}

.chart-container {
    position: relative;
    margin: auto;
    height: 250px;
    width: 100%;
}

.modal-content-custom {
    background: #14191e !important;
    border: 1px solid var(--cyan-primary) !important;
    color: #ffffff;
    border-radius: 12px;
}
[data-theme='light'] .modal-content-custom {
    background: #ffffff !important;
    border: 1px solid #ced4da !important;
    color: #212529;
}
.modal-header-custom {
    border-bottom: 1px solid rgba(0, 210, 255, 0.2) !important;
}
.modal-footer-custom {
    border-top: 1px solid rgba(0, 210, 255, 0.2) !important;
}