:root {
    /* --- TEMA DARK (Por defecto) --- */
    --bg-main: radial-gradient(circle at top center, #1a2a3a 0%, #0f1214 80%);
    --text-main: #e0e0e0;
    --text-title: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --cyan-primary: #0dcaf0;
    --accent-glow: rgba(0, 210, 255, 0.3);
    --progress-bg: rgba(255, 255, 255, 0.1);
    --progress-bar-bg: #00d2ff;
    --progress-bar-text: #000;
    --progress-complete-bg: #00ff9d;
    --progress-complete-glow: rgba(0, 255, 157, 0.6);
    --hud-bg: rgba(15, 20, 25, 0.85);
    --hud-border: rgba(0, 210, 255, 0.2);
    --accordion-bg: rgba(20, 25, 30, 0.6);
    --accordion-active-bg: rgba(0, 210, 255, 0.1);
    --accordion-border: rgba(0, 210, 255, 0.3);
    --check-checked-bg: rgba(0, 255, 157, 0.05);
    --check-checked-border: #00ff9d;
    --check-checked-text: #00ff9d;
    --check-checked-note: #a3cfbb;
    --check-critical-border: #ffc107;
    --check-critical-text: #ffda6a;
    --input-bg: rgba(0, 0, 0, 0.5);
    --input-border: #6c757d;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f8f9fa;
    --text-main: #212529;
    --text-title: #1a1d21;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --cyan-primary: #00768a;
    --accent-glow: none;
    --progress-bg: rgba(0, 0, 0, 0.1);
    --progress-bar-bg: #00768a;
    --progress-bar-text: #fff;
    --progress-complete-bg: #198754;
    --progress-complete-glow: none;
    --hud-bg: rgba(255, 255, 255, 0.9);
    --hud-border: rgba(0, 0, 0, 0.1);
    --accordion-bg: #ffffff;
    --accordion-active-bg: #e9ecef;
    --accordion-border: #dee2e6;
    --check-checked-bg: #f8fff9;
    --check-checked-border: #198754;
    --check-checked-text: #198754;
    --check-checked-note: #495057;
    --check-critical-border: #f59e0b;
    --check-critical-text: #b45309;
    --input-bg: #fff;
    --input-border: #adb5bd;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

h1,
h2,
h3 {
    color: var(--text-title);
    text-shadow: 0 0 10px var(--accent-glow);
}

.content-wrapper .lead {
    color: var(--text-main) !important;
}

/* --- BARRA DE PROGRESO STICKY (HUD STYLE) --- */
.progress-container {
    position: sticky;
    top: 56px;
    z-index: 1020;
    background: var(--hud-bg);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    border-bottom: 1px solid var(--hud-border);
    box-shadow: 0 4px 20px var(--shadow-color);
}

.progress {
    background-color: var(--progress-bg);
    border-radius: 4px;
    height: 25px;
    overflow: visible;
}

.progress-bar {
    background-color: var(--progress-bar-bg);
    color: var(--progress-bar-text);
    font-weight: 700;
    box-shadow: 0 0 10px var(--accent-glow);
    transition: width 0.4s ease;
}

.progress-bar.bg-success {
    background-color: var(--progress-complete-bg) !important;
    box-shadow: 0 0 15px var(--progress-complete-glow);
    color: #fff;
}

[data-theme='light'] .progress-bar {
    box-shadow: none;
}

/* --- ACORDEÓN --- */
.accordion-item {
    background-color: transparent;
    border: 1px solid var(--accordion-border);
    margin-bottom: 1rem;
    border-radius: 8px !important;
    overflow: hidden;
}

.accordion-button {
    background-color: var(--accordion-bg);
    color: var(--cyan-primary);
    font-weight: 700;
    box-shadow: none !important;
}

.accordion-button:not(.collapsed) {
    background-color: var(--accordion-active-bg);
    color: var(--text-title);
    text-shadow: 0 0 5px var(--accent-glow);
}

.accordion-button::after {
    filter: var(--theme-icon-filter, invert(1) grayscale(100%) brightness(200%));
}

[data-theme='light'] .accordion-button::after {
    filter: none;
}

.accordion-body {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 1rem;
}

[data-theme='light'] .accordion-body {
    background-color: #fff;
}

/* --- TARJETAS CHECKLIST --- */
.check-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    display: flex;
    align-items: flex-start;
}

.check-card:hover {
    background-color: rgba(0, 210, 255, 0.05);
    border-color: var(--cyan-primary);
}

.check-card.is-checked {
    background-color: var(--check-checked-bg);
    border: 1px solid var(--check-checked-border);
    box-shadow: 0 0 10px rgba(0, 255, 157, 0.1) inset;
}

/* CHECKBOX CUSTOM */
.form-check-input {
    width: 1.6em;
    height: 1.6em;
    margin-right: 15px;
    flex-shrink: 0;
    background-color: var(--input-bg);
    border: 2px solid var(--input-border);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--check-checked-border);
    border-color: var(--check-checked-border);
    box-shadow: 0 0 10px var(--progress-complete-glow);
}

.form-check-input:checked[type=checkbox] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10l3 3l6-6'/%3e%3c/svg%3e");
}

/* TEXTOS */
.check-label {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--text-title);
    display: block;
    cursor: pointer;
}

.check-card.is-checked .check-label {
    color: var(--check-checked-text);
    text-shadow: 0 0 5px var(--progress-complete-glow);
}

[data-theme='light'] .check-card.is-checked .check-label {
    text-shadow: none;
}

.text-note {
    font-size: 0.9rem;
    color: var(--text-main);
    display: block;
    margin-top: 4px;
    line-height: 1.4;
}

.check-card.is-checked .text-note {
    color: var(--check-checked-note);
}

/* ITEMS CRÍTICOS */
.check-card.critical {
    border-left: 4px solid var(--check-critical-border);
}

.check-card.critical .check-label {
    color: var(--check-critical-text);
}

/* Botón Imprimir */
.btn-outline-primary {
    color: var(--cyan-primary);
    border-color: var(--cyan-primary);
}

.btn-outline-primary:hover {
    background-color: var(--cyan-primary);
    color: #fff;
    box-shadow: 0 0 15px var(--accent-glow);
}

.container-custom {
    max-width: 1600px;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    margin: 0 auto;
}

/* SELECTOR DE TEMA */
.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: 1030;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

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

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

@media print {

    .progress-container,
    .btn-outline-primary,
    footer,
    .navbar,
    .theme-toggle {
        display: none !important;
    }

    body {
        background: #fff !important;
        color: #000 !important;
    }

    .accordion-item {
        border: 1px solid #ddd !important;
    }

    .check-card {
        border: 1px solid #ddd !important;
        background: #fff !important;
    }

    .check-label,
    .text-note {
        color: #000 !important;
    }

    h1,
    h2 {
        color: #000 !important;
        text-shadow: none !important;
    }
}