: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, 0.5);

    /* Colores Especiales */
    --cyan-primary: #00d2ff;
    --green-accent: #00ff9d;
    --orange-accent: #fd7e14;
    --color-warning: #ffc107;

    /* Text Shadows */
    --shadow-cyan: rgba(0, 210, 255, 0.3);
    --shadow-green: rgba(0, 255, 157, 0.5);

    /* Cards */
    --card-bg: rgba(20, 25, 30, 0.85);
    --card-border: rgba(0, 210, 255, 0.3);
    --card-border-orange: rgba(253, 126, 20, 0.3);
    --card-border-warning: rgba(255, 193, 7, 0.3);
    --card-shadow: rgba(0, 210, 255, 0.05);

    /* Result Box */
    --result-bg: linear-gradient(135deg, rgba(0, 210, 255, 0.15), rgba(0, 255, 157, 0.1));
    --result-border: #00d2ff;
    --result-line-grad: linear-gradient(90deg, #00d2ff, #00ff9d);

    /* Depreciation */
    --depr-bar-bg: rgba(255, 255, 255, 0.1);
    --depr-fill: linear-gradient(90deg, #00ff9d, #ffc107, #ff6b6b);

    /* Inputs */
    --input-bg: rgba(0, 0, 0, 0.3);
    --input-border: rgba(255, 255, 255, 0.15);
    --input-focus-bg: rgba(0, 0, 0, 0.4);
    --input-placeholder: rgba(255, 255, 255, 0.5);
    --input-group-text-bg: #212529;
    --input-group-text-color: #fff;

    /* Checkboxes */
    --check-bg: rgba(0, 0, 0, 0.2);
    --check-border: rgba(255, 255, 255, 0.1);
    --check-hover-bg: rgba(0, 210, 255, 0.1);

    /* Info Box */
    --info-note-bg: rgba(255, 193, 7, 0.1);
    --info-note-color: rgba(255, 255, 255, 0.8);

    /* Botones */
    --btn-tasador-grad: linear-gradient(135deg, #00d2ff, #00ff9d);
    --btn-tasador-text: #000;
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f8f9fa;
    --bg-gradient: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
    --text-main: #212529;
    --text-title: #1a1d21;
    --text-muted: #6c757d;

    /* Colores Especiales */
    --cyan-primary: #00768a;
    --green-accent: #0f8a5f;
    --orange-accent: #d85c00;
    --color-warning: #78652a;
    /* Ajustado para mejor contraste en blanco */

    /* Text Shadows - reducidos o quitados en light */
    --shadow-cyan: rgba(0, 118, 138, 0.1);
    --shadow-green: rgba(15, 138, 95, 0.1);

    /* Cards */
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --card-border-orange: rgba(216, 92, 0, 0.2);
    --card-border-warning: rgba(255, 193, 7, 0.5);
    --card-shadow: rgba(0, 0, 0, 0.05);

    /* Result Box */
    --result-bg: linear-gradient(135deg, rgba(0, 118, 138, 0.05), rgba(15, 138, 95, 0.05));
    --result-border: #00768a;
    --result-line-grad: linear-gradient(90deg, #00768a, #0f8a5f);

    /* Depreciation */
    --depr-bar-bg: rgba(0, 0, 0, 0.1);
    --depr-fill: linear-gradient(90deg, #0f8a5f, #e0a800, #dc3545);

    /* Inputs */
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-focus-bg: #ffffff;
    --input-placeholder: #6c757d;
    --input-group-text-bg: #e9ecef;
    --input-group-text-color: #495057;

    /* Checkboxes */
    --check-bg: #f8f9fa;
    --check-border: #dee2e6;
    --check-hover-bg: rgba(0, 118, 138, 0.05);

    /* Info Box */
    --info-note-bg: rgba(255, 193, 7, 0.15);
    --info-note-color: #664d03;

    /* Botones */
    --btn-tasador-grad: linear-gradient(135deg, #00768a, #0f8a5f);
    --btn-tasador-text: #fff;
}

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

/* Wrapper para proteger header */
.tasador-content {
    max-width: 900px;
    margin: 0 auto;
}

/* Tipografía */
.tasador-content h1,
.tasador-content h2,
.tasador-content h3,
.tasador-content h4,
.tasador-content h5,
.tasador-content h6 {
    color: var(--text-title);
    text-shadow: 0 0 10px var(--shadow-cyan);
}

[data-theme='light'] .tasador-content h1,
[data-theme='light'] .tasador-content h2,
[data-theme='light'] .tasador-content h3,
[data-theme='light'] .tasador-content h4,
[data-theme='light'] .tasador-content h5,
[data-theme='light'] .tasador-content h6 {
    text-shadow: none;
}

/* Colores de texto custom */
.tasador-content .text-cyan {
    color: var(--cyan-primary) !important;
}

.tasador-content .text-green {
    color: var(--green-accent) !important;
}

.tasador-content .text-orange {
    color: var(--orange-accent) !important;
}

.tasador-content .text-warning-custom {
    color: var(--color-warning) !important;
}

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

/* Cards */
.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(--card-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.tech-card.border-orange {
    border-color: var(--card-border-orange) !important;
}

.tech-card.border-warning {
    border-color: var(--card-border-warning) !important;
}

/* Result Box */
.result-box {
    background: var(--result-bg);
    border: 2px solid var(--result-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.result-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--result-line-grad);
}

.result-value {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--green-accent);
    text-shadow: 0 0 30px var(--shadow-green);
    font-family: 'Roboto Mono', monospace;
}

[data-theme='light'] .result-value {
    text-shadow: none;
}

.result-range {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Desglose */
.desglose-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--card-border);
}

.desglose-item:last-child {
    border: none;
}

.desglose-base {
    color: var(--text-main);
    font-weight: 600;
}

.desglose-suma {
    color: var(--green-accent);
}

.desglose-resta {
    color: #ff6b6b;
}

[data-theme='light'] .desglose-resta {
    color: #dc3545;
}

/* Form Elements */
.form-control,
.form-select {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
}

.form-control:focus,
.form-select:focus {
    background: var(--input-focus-bg);
    border-color: var(--cyan-primary);
    box-shadow: 0 0 10px var(--shadow-cyan);
    color: var(--text-main);
}

[data-theme='light'] .form-control:focus,
[data-theme='light'] .form-select:focus {
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-control::placeholder {
    color: var(--input-placeholder);
}

.form-select option {
    background: var(--bg-main);
    color: var(--text-main);
}

.form-label {
    color: var(--cyan-primary);
    font-weight: 600;
}

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

/* Input Group Text */
.input-group-text-custom {
    background-color: var(--input-group-text-bg) !important;
    color: var(--input-group-text-color) !important;
    border-color: var(--input-border) !important;
}

/* Checkboxes */
.extra-check {
    background: var(--check-bg);
    border: 1px solid var(--check-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.extra-check:hover {
    border-color: var(--cyan-primary);
    background: var(--check-hover-bg);
}

.extra-check .form-check-label {
    color: var(--text-main);
    cursor: pointer;
    opacity: 0.8;
}

.extra-check input:checked+label {
    color: var(--green-accent);
    opacity: 1;
}

/* Depreciacion */
.depreciation-bar {
    height: 8px;
    background: var(--depr-bar-bg);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.depreciation-fill {
    height: 100%;
    background: var(--depr-fill);
    transition: width 0.5s ease;
}

/* Buttons */
.btn-tasador {
    background: var(--btn-tasador-grad);
    border: none;
    color: var(--btn-tasador-text);
    font-weight: 700;
    padding: 0.75rem 2rem;
    border-radius: 30px;
    transition: all 0.3s;
}

.btn-tasador:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--shadow-cyan);
    color: var(--btn-tasador-text);
}

[data-theme='light'] .btn-tasador:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Info Box */
.info-note {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--info-note-bg);
    border-radius: 8px;
    color: var(--info-note-color);
}

.info-list {
    color: var(--text-muted);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 45px;
    height: 45px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    box-shadow: 0 4px 15px var(--card-shadow);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle i {
    font-size: 1.2rem;
    color: var(--cyan-primary);
}