:root {
    /* --- TEMA DARK (Por defecto) --- */
    --bg-main: #141619;
    --bg-gradient: radial-gradient(circle at 50% 0, #2c3e50, #141619);
    --text-main: #e0e0e0;
    --text-title: #ffffff;
    --text-subtitle: rgba(255, 255, 255, 0.5);
    --text-muted: rgba(255, 255, 255, 0.6);
    --text-label: rgba(255, 255, 255, 0.7);
    --card-bg: rgba(30, 35, 40, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(0, 0, 0, 0.4);
    --input-focus-bg: rgba(0, 0, 0, 0.6);
    --input-border: #444;
    --input-group-bg: #2a2d35;
    --input-group-border: rgba(255, 255, 255, 0.2);
    --input-group-text: rgba(255, 255, 255, 0.6);
    --solar-primary: #ffc107;
    --solar-glow: rgba(255, 193, 7, 0.5);
    --info-primary: #0dcaf0;
    --success-primary: #198754;
    --danger-primary: #dc3545;
    --warning-primary: #ffc107;
    --badge-secondary-bg: #6c757d;
    --badge-secondary-text: #ffffff;
    --alert-danger-bg: rgba(220, 53, 69, 0.25);
    --alert-danger-border: #dc3545;
    --alert-info-bg: rgba(13, 202, 240, 0.15);
    --alert-info-border: rgba(13, 202, 240, 0.4);
    --alert-info-text: #8dd3e0;
    --alert-warning-bg: rgba(255, 193, 7, 0.15);
    --alert-warning-border: var(--solar-primary);
    --border-secondary: rgba(255, 255, 255, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.5);
    --button-warning-bg: #ffc107;
    --button-warning-text: #000;
    --button-warning-hover-bg: #e0a800;
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f8f9fa;
    --bg-gradient: radial-gradient(circle at 50% 0, #e9ecef, #f8f9fa);
    --text-main: #212529;
    --text-title: #1a1d21;
    --text-subtitle: #495057;
    --text-muted: #6c757d;
    --text-label: #343a40;
    --card-bg: #ffffff;
    --card-border: #dee2e6;
    --input-bg: #f8f9fa;
    --input-focus-bg: #ffffff;
    --input-border: #ced4da;
    --input-group-bg: #e9ecef;
    --input-group-border: #ced4da;
    --input-group-text: #495057;
    --solar-primary: #d4a805;
    --solar-glow: rgba(212, 168, 5, 0.3);
    --info-primary: #0a6e80;
    --success-primary: #146c43;
    --danger-primary: #b02a37;
    --warning-primary: #d4a805;
    --badge-secondary-bg: #6c757d;
    --badge-secondary-text: #ffffff;
    --alert-danger-bg: #f8d7da;
    --alert-danger-border: #f1aeb5;
    --alert-info-bg: #cff4fc;
    --alert-info-border: #9eeaf9;
    --alert-info-text: #055160;
    --alert-warning-bg: #fff3cd;
    --alert-warning-border: #ffda6a;
    --border-secondary: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --button-warning-bg: #d4a805;
    --button-warning-text: #000;
    --button-warning-hover-bg: #b89204;
}

body {
    background-color: var(--bg-main);
    background-image: var(--bg-gradient);
    color: var(--text-main);
}

/* --- CONTAINER --- */
.solar-container {
    max-width: 900px;
}

/* --- CARDS --- */
.hud-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
}

/* --- INPUTS --- */
.hud-input {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
    border-radius: 8px;
}

.hud-input:focus {
    background: var(--input-focus-bg);
    border-color: var(--solar-primary);
    color: var(--text-main);
    box-shadow: 0 0 10px var(--solar-glow);
}

.hud-input::placeholder {
    color: var(--text-muted);
}

.input-group-text {
    background-color: var(--input-group-bg) !important;
    border-color: var(--input-group-border) !important;
    color: var(--input-group-text) !important;
}

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

/* --- TYPOGRAPHY --- */
.solar-title {
    color: var(--text-title);
}

.solar-subtitle {
    color: var(--text-subtitle);
}

.text-solar {
    color: var(--solar-primary);
    text-shadow: 0 0 10px var(--solar-glow);
}

.label-hud {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-label);
}

.label-solar {
    color: var(--solar-primary) !important;
}

.label-info {
    color: var(--info-primary) !important;
}

.display-number {
    font-family: 'Roboto Mono', monospace;
    font-weight: 700;
    font-size: 2.5rem;
}

/* --- ALERTS --- */
.alert-error {
    background: var(--alert-danger-bg);
    border-color: var(--alert-danger-border);
    color: var(--text-main);
}

.alert-obc {
    background: var(--alert-info-bg);
    border: 1px solid var(--alert-info-border);
    color: var(--alert-info-text);
}

.alert-wallbox {
    background: var(--alert-warning-bg);
    border: 1px solid var(--alert-warning-border);
    border-radius: 0.5rem;
}

/* --- BUTTONS --- */
.btn-solar {
    background-color: var(--button-warning-bg);
    color: var(--button-warning-text);
    font-weight: bold;
    border: none;
    transition: all 0.3s ease;
}

.btn-solar:hover {
    background-color: var(--button-warning-hover-bg);
    color: var(--button-warning-text);
}

/* --- BADGES --- */
.badge-secondary {
    background-color: var(--badge-secondary-bg) !important;
    color: var(--badge-secondary-text) !important;
}

.badge-solar {
    background-color: var(--solar-primary) !important;
    color: #000 !important;
}

.badge-info {
    background-color: var(--info-primary) !important;
    color: #fff !important;
}

/* --- RESULTS --- */
.result-border {
    border-color: var(--border-secondary) !important;
}

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

.result-title {
    color: var(--solar-primary);
}

.result-time {
    color: var(--text-main);
    font-weight: bold;
}

/* --- WAITING STATE --- */
.waiting-icon {
    color: var(--solar-primary);
}

.waiting-title {
    color: var(--text-main);
}

.waiting-message {
    color: var(--text-muted);
}

/* --- THEME TOGGLE BUTTON --- */
.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(--shadow-color);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--solar-primary);
}

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