:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-primary: #38bdf8;
    --accent-secondary: #818cf8;
    --success: #10b981;
    --error: #f43f5e;
    --warning: #f59e0b;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-lg: 0 10px 30px -10px rgba(0,0,0,0.5);
    --sidebar-width: 280px;

    /* Variables de compatibilidad y extension de diseno */
    --info: #38bdf8;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(56, 189, 248, 0.3);
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --bg-sidebar: rgba(15, 23, 42, 0.85);
    --bg-code: #0b1120;
    --text-primary: var(--text-main);
    --text-secondary: var(--text-muted);
    --accent-flask: var(--accent-primary);
    --accent-flask-dark: #0284c7;
    --accent-flask-glow: rgba(56, 189, 248, 0.15);
    --accent-green: var(--success);
    --accent-red: var(--error);
    --accent-yellow: var(--warning);
    --glass-blur: 20px;
    --shadow-card: var(--shadow-lg);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.background-orbs { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -1; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4; animation: float 20s infinite alternate; }
.orb-1 { top: -10%; left: -10%; width: 50vw; height: 50vw; background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%); }
.orb-2 { bottom: -10%; right: -10%; width: 40vw; height: 40vw; background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%); animation-delay: -5s; }
.orb-3 { top: 40%; left: 60%; width: 30vw; height: 30vw; background: radial-gradient(circle, var(--success) 0%, transparent 70%); opacity: 0.15; animation-delay: -10s; }
@keyframes float { 0% { transform: translate(0, 0) scale(1); } 50% { transform: translate(5%, 10%) scale(1.1); } 100% { transform: translate(-5%, -5%) scale(0.9); } }

.particles-container { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; }
.particle { position: absolute; width: 4px; height: 4px; background: var(--accent-primary); border-radius: 50%; opacity: 0.3; animation: particleRise linear infinite; }
@keyframes particleRise { 0% { transform: translateY(100vh) scale(0); opacity: 0; } 50% { opacity: 0.5; } 100% { transform: translateY(-10vh) scale(1); opacity: 0; } }

.glass-panel { background: var(--glass-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); }
.glass-panel-inner { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 1.5rem; }

/* SIDEBAR */
.sidebar { position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh; z-index: 200; display: flex; flex-direction: column; overflow-y: auto; border-right: 1px solid var(--glass-border); border-radius: 0; transition: transform 0.3s ease; }
.sidebar-header { padding: 1.5rem; border-bottom: 1px solid var(--glass-border); }
.logo { display: flex; align-items: center; gap: 0.5rem; }
.logo-icon { font-size: 1.5rem; }
.logo-text { font-family: 'Space Grotesk', sans-serif; font-size: 1.3rem; font-weight: 700; }
.logo-text .highlight { color: var(--success); }
.sidebar-version { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; }

.sidebar-user { padding: 1rem 1.5rem; border-bottom: 1px solid var(--glass-border); }
.user-level { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.user-level span:first-child { font-weight: 600; color: var(--accent-primary); }
.user-level-badge { font-size: 0.75rem; background: rgba(56, 189, 248, 0.2); padding: 0.2rem 0.5rem; border-radius: var(--radius-sm); color: var(--accent-primary); }
.user-xp { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 0.5rem; }

.sidebar-progress { padding: 0.75rem 1.5rem; border-bottom: 1px solid var(--glass-border); }
.progress-label { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.progress-bar { height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 3px; transition: width 0.5s ease; }
.xp-bar .progress-fill { background: linear-gradient(90deg, var(--warning), var(--accent-primary)); }
.course-bar .progress-fill { background: linear-gradient(90deg, var(--success), var(--accent-secondary)); }

.sidebar-search { padding: 1rem 1.5rem; }
.sidebar-search input { width: 100%; padding: 0.5rem 0.75rem; background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); color: var(--text-main); font-size: 0.875rem; outline: none; }
.sidebar-search input:focus { border-color: var(--accent-primary); }

.sidebar-nav { flex: 1; padding: 0.5rem 0; overflow-y: auto; }
.nav-section { margin-bottom: 0.5rem; }
.nav-section-title { display: block; padding: 0.5rem 1.5rem; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); font-weight: 700; }
.nav-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.6rem 1.5rem; color: var(--text-muted); text-decoration: none; transition: var(--transition); font-size: 0.875rem; border-left: 3px solid transparent; }
.nav-item:hover { background: rgba(255,255,255,0.05); color: var(--text-main); }
.nav-item.active { background: rgba(56, 189, 248, 0.1); color: var(--accent-primary); border-left-color: var(--accent-primary); }
.nav-icon { font-size: 1.1rem; }
.nav-text { flex: 1; }
.nav-badge { font-size: 0.7rem; background: rgba(255,255,255,0.1); padding: 0.15rem 0.4rem; border-radius: 10px; min-width: 20px; text-align: center; }
.nav-badge.completed { background: var(--success); color: white; }

.sidebar-toggle { display: none; position: fixed; top: 1rem; left: 1rem; z-index: 300; background: var(--glass-bg); border: 1px solid var(--glass-border); color: var(--text-main); font-size: 1.5rem; padding: 0.5rem; border-radius: var(--radius-sm); cursor: pointer; backdrop-filter: blur(10px); }

/* MAIN WRAPPER */
.main-wrapper { margin-left: var(--sidebar-width); min-height: 100vh; }
body.no-sidebar .main-wrapper,
body:not(:has(#sidebar)) .main-wrapper {
    margin-left: 0;
}

.top-header { position: sticky; top: 0; z-index: 100; display: flex; justify-content: space-between; align-items: center; padding: 0.75rem 2rem; border-bottom: 1px solid var(--glass-border); border-radius: 0; backdrop-filter: blur(12px); }
.breadcrumb { font-size: 0.875rem; color: var(--text-muted); }
.breadcrumb span { color: var(--text-main); font-weight: 600; }
.header-actions { display: flex; gap: 0.5rem; }

/* Dos medidas: el contenedor crece para que los listados, las tablas y los
   diagramas aprovechen la pantalla, y la prosa conserva su medida de lectura.
   Con un unico ancho estrecho el codigo quedaba con barra de desplazamiento
   lateral mientras sobraba media pantalla en blanco. */
.content { padding: 2rem; max-width: 1320px; margin: 0 auto; }
/* Medida de lectura: por encima de ~80 caracteres la vista pierde el punto de
   retorno al saltar de renglon. No aplica al codigo ni a las tablas, que se
   leen de un vistazo y no renglon a renglon. */
.content p,
.content li,
.content blockquote { max-width: 78ch; }


.page-section { display: none; animation: fadeInUp 0.4s ease; }
.page-section.active { display: block; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* HERO */
.hero-section { text-align: center; padding: 4rem 2rem; margin-bottom: 2rem; }
.badge { display: inline-block; padding: 0.5rem 1rem; background: rgba(16, 185, 129, 0.2); color: var(--success); border-radius: var(--radius-sm); font-size: 0.875rem; font-weight: 600; margin-bottom: 1.5rem; border: 1px solid rgba(16, 185, 129, 0.3); }
.title { font-family: 'Space Grotesk', sans-serif; font-size: 3rem; line-height: 1.2; margin-bottom: 1.5rem; }
.gradient-text { background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.subtitle { color: var(--text-muted); font-size: 1.15rem; max-width: 600px; margin: 0 auto 2rem; }

.hero-stats { display: flex; justify-content: center; gap: 3rem; margin-bottom: 2rem; }
.stat { text-align: center; }
.stat-number { display: block; font-family: 'Space Grotesk', sans-serif; font-size: 2rem; font-weight: 700; color: var(--accent-primary); }
.stat-label { font-size: 0.875rem; color: var(--text-muted); }

.action-buttons { display: flex; gap: 1rem; justify-content: center; }
.btn { display: inline-block; padding: 0.75rem 1.5rem; border-radius: var(--radius-sm); font-weight: 600; text-decoration: none; transition: var(--transition); cursor: pointer; border: none; font-family: 'Inter', sans-serif; font-size: 0.95rem; }
.btn-sm { padding: 0.4rem 1rem; font-size: 0.8rem; }
.btn-primary { background: var(--accent-primary); color: var(--bg-primary); }
.btn-primary:hover { background: #0ea5e9; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(56, 189, 248, 0.4); }
.btn-secondary { background: rgba(255, 255, 255, 0.1); color: var(--text-main); border: 1px solid var(--glass-border); }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.2); transform: translateY(-2px); }
.btn.completed { background: var(--success); pointer-events: none; }

/* SECTION CARDS */
.section-card { padding: 2.5rem; margin-bottom: 2rem; transition: var(--transition); }
.section-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* MODULE HERO */
.module-hero { text-align: center; margin-bottom: 2rem; padding-bottom: 2rem; border-bottom: 1px solid var(--glass-border); }
.module-badge { display: inline-block; padding: 0.3rem 0.75rem; background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); color: white; border-radius: var(--radius-sm); font-size: 0.8rem; font-weight: 700; margin-bottom: 1rem; }
.module-hero h1 { font-family: 'Space Grotesk', sans-serif; font-size: 2rem; margin-bottom: 0.5rem; }
.module-hero p { color: var(--text-muted); margin-bottom: 1rem; }
.module-meta { display: flex; gap: 0.5rem; justify-content: center; }
.meta-chip { font-size: 0.75rem; padding: 0.25rem 0.6rem; background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border); border-radius: 20px; color: var(--text-muted); }

/* TECH GRID */
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 1.5rem; }
.tech-card { text-align: center; padding: 1.5rem; transition: var(--transition); }
.tech-card:hover { transform: translateY(-4px); background: rgba(255,255,255,0.05); }
.tech-icon { font-size: 2rem; display: block; margin-bottom: 0.5rem; }
.tech-card h4 { font-family: 'Space Grotesk', sans-serif; margin-bottom: 0.25rem; }
.tech-card p { font-size: 0.8rem; color: var(--text-muted); }

/* CONCEPT GRID */
.concept-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.concept-card { transition: var(--transition); }
.concept-card:hover { transform: translateY(-4px); background: rgba(255,255,255,0.05); }
.concept-card h4 { color: var(--accent-primary); font-family: 'JetBrains Mono', monospace; font-size: 0.9rem; margin-bottom: 0.5rem; }
.concept-card p { font-size: 0.85rem; color: var(--text-muted); }

/* TYPOGRAPHY */
h1, h2, h3, h4 { font-family: 'Space Grotesk', sans-serif; margin-bottom: 1rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; }

/* ALERTS */
.alert-box { padding: 1.5rem; border-radius: var(--radius-md); margin-bottom: 1.5rem; border-left: 4px solid; background: rgba(255, 255, 255, 0.03); }
.alert-box.note { border-left-color: var(--accent-secondary); }
.alert-box.important { border-left-color: var(--error); background: rgba(244, 63, 94, 0.05); }
.alert-box.success { border-left-color: var(--success); background: rgba(16, 185, 129, 0.05); }
/* Los datos de los modulos usan las variantes `info` y `warning`, que no
   existian aqui: los avisos salian con el borde sin color. */
.alert-box.info { border-left-color: var(--info); background: rgba(59, 130, 246, 0.05); }
.alert-box.warning { border-left-color: var(--warning); background: rgba(245, 158, 11, 0.06); }
.alert-box h4 { margin: 0 0 0.5rem; font-size: 1rem; color: var(--text-main); }
.alert-box p { margin: 0; }

/* CABECERA Y BLOQUES DE MODULO */
.module-title { margin: 0.25rem 0 0.75rem; }
.module-intro { color: var(--text-muted); margin-bottom: 1.75rem; }
.block-caption { margin: 1.5rem 0 0.5rem; font-weight: 600; color: var(--text-main); }

/* El diagrama llega como descripcion en prosa, no como figura: se rotula para
   que se lea como una explicacion y no como un parrafo suelto mas. */
.diagram-card {
    margin: 1.5rem 0;
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--glass-border);
    border-left: 4px solid var(--accent-secondary);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
}
.diagram-title { font-weight: 700; color: var(--accent-primary); margin-bottom: 0.5rem; }
.diagram-body { margin: 0; color: var(--text-muted); }

/* TABLES */
.comparison-wrapper { margin: 1.5rem 0; }
/* La tabla se desplaza dentro de su propia caja: nunca empuja la pagina. */
.table-scroll { overflow-x: auto; }
.comparison-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.comparison-table th, .comparison-table td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--glass-border); }
.comparison-table th { background: rgba(255,255,255,0.05); font-weight: 600; color: var(--accent-primary); font-size: 0.85rem; }
.comparison-table td { font-size: 0.9rem; color: var(--text-muted); }
.comparison-table tr:hover td { background: rgba(255,255,255,0.02); }

/* CODE */
pre[class*="language-"] { background: rgba(0, 0, 0, 0.3) !important; border: 1px solid var(--glass-border); border-radius: var(--radius-md) !important; margin: 1.5rem 0 !important; position: relative; }
code[class*="language-"] { background: transparent !important; text-shadow: none !important; font-family: 'JetBrains Mono', 'Consolas', monospace !important; font-size: 0.85rem !important; }
:not(pre) > code, code { background: rgba(255, 255, 255, 0.1) !important; padding: 0.2em 0.4em !important; border-radius: var(--radius-sm) !important; color: var(--accent-primary); font-family: 'JetBrains Mono', monospace !important; font-size: 0.85em !important; }
.copy-btn { position: absolute; top: 0.5rem; right: 0.5rem; background: rgba(255,255,255,0.1); border: 1px solid var(--glass-border); color: var(--text-muted); padding: 0.25rem 0.5rem; border-radius: var(--radius-sm); font-size: 0.7rem; cursor: pointer; z-index: 10; }
.copy-btn:hover { background: rgba(255,255,255,0.2); color: var(--text-main); }

/* LISTS */
ul, ol { margin-left: 1.5rem; margin-bottom: 1rem; color: var(--text-muted); }
li { margin-bottom: 0.5rem; }

/* TABS */
.tabs { margin-top: 2rem; }
.tab-header { display: flex; gap: 0.5rem; margin-bottom: 1rem; border-bottom: 1px solid var(--glass-border); padding-bottom: 0.5rem; overflow-x: auto; }
.tab-btn { background: transparent; border: none; color: var(--text-muted); padding: 0.75rem 1.5rem; border-radius: var(--radius-sm); cursor: pointer; font-weight: 600; transition: var(--transition); font-size: 0.9rem; white-space: nowrap; }
.tab-btn:hover { background: rgba(255,255,255,0.05); color: var(--text-main); }
.tab-btn.active { background: var(--accent-primary); color: var(--bg-primary); }
.tab-content { opacity: 0; transform: translateY(10px); transition: all 0.4s ease; }
.tab-content.active { opacity: 1; transform: translateY(0); }

/* GRIDS */
.grid-2-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.card { padding: 1.5rem; transition: var(--transition); }
.card:hover { background: rgba(255, 255, 255, 0.05); }
.border-error { border-color: rgba(244, 63, 94, 0.3) !important; }
.border-success { border-color: rgba(16, 185, 129, 0.3) !important; }
.border-primary { border-color: rgba(56, 189, 248, 0.3) !important; }
.text-error { color: var(--error); }
.text-success { color: var(--success); }
.mt-4 { margin-top: 1.5rem; }

/* SIMULATORS */
.simulator-card { padding: 2rem; margin-bottom: 2rem; }

.sim-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem; }
.sim-icon { font-size: 1.5rem; }
.sim-header h3 { margin: 0; font-size: 1.1rem; }
.sim-body { margin-bottom: 1rem; }
.sim-controls { display: flex; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.sim-input-group { flex: 1; min-width: 200px; }
.sim-input-group label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.3rem; }
.sim-select, .sim-input { width: 100%; padding: 0.5rem; background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); color: var(--text-main); font-size: 0.9rem; }
.sim-textarea { width: 100%; min-height: 100px; padding: 0.75rem; background: rgba(0,0,0,0.3); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); color: var(--text-main); font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; resize: vertical; }
.sim-split { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
.sim-output, .sim-preview { min-height: 80px; }
.code-header { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.5rem; }
.browser-preview { padding: 1rem; background: rgba(0,0,0,0.2); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; color: var(--success); min-height: 60px; }
.browser-preview.validation-ok { border-color: var(--success); }
.browser-preview.validation-error { border-color: var(--error); }
.sim-footer { margin-top: 1rem; text-align: right; }
.db-results { padding: 0.75rem; background: rgba(0,0,0,0.2); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); }
.db-row { padding: 0.3rem 0; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: var(--text-muted); border-bottom: 1px solid rgba(255,255,255,0.05); }
.url-input-wrapper { display: flex; align-items: center; background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); overflow: hidden; }
.url-input-wrapper span { padding: 0.5rem; background: rgba(255,255,255,0.05); color: var(--text-muted); font-size: 0.8rem; font-family: 'JetBrains Mono', monospace; }
.url-input-wrapper input { flex: 1; padding: 0.5rem; background: transparent; border: none; color: var(--text-main); font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; outline: none; }

/* QUIZ */
.quiz-card { text-align: center; }
.quiz-question { font-size: 1.1rem; margin-bottom: 1.5rem; color: var(--text-main); }
.quiz-options { display: grid; gap: 0.75rem; }
.quiz-option-btn { padding: 0.75rem 1rem; background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); color: var(--text-main); cursor: pointer; transition: var(--transition); font-size: 0.9rem; text-align: left; }
.quiz-option-btn:hover { background: rgba(255,255,255,0.1); border-color: var(--accent-primary); }
.quiz-option-btn.correct { background: rgba(16, 185, 129, 0.2); border-color: var(--success); color: var(--success); }
.quiz-option-btn.incorrect { background: rgba(244, 63, 94, 0.2); border-color: var(--error); color: var(--error); animation: shake 0.4s; }
.quiz-feedback { margin-top: 1rem; font-weight: 600; }
@keyframes shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

/* DEBUG */
.debug-task { color: var(--warning); }
.debug-options { display: grid; gap: 0.75rem; margin-top: 1rem; }

/* EXERCISES */
.exercise-block { padding: 2rem; margin-bottom: 1.5rem; }
.exercise-badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: var(--radius-sm); font-size: 0.75rem; font-weight: 700; margin-bottom: 0.75rem; }
.exercise-badge.challenge { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.exercise-badge.project { background: rgba(129, 140, 248, 0.2); color: var(--accent-secondary); }

/* XP TOAST */
.xp-toast { position: fixed; bottom: 2rem; right: 2rem; display: flex; align-items: center; gap: 0.75rem; padding: 1rem 1.5rem; background: var(--glass-bg); backdrop-filter: blur(20px); border: 1px solid var(--glass-border); border-radius: var(--radius-md); box-shadow: var(--shadow-lg); transform: translateX(120%); transition: transform 0.4s ease; z-index: 1000; }
.xp-toast.show { transform: translateX(0); }
.xp-toast-icon { font-size: 1.5rem; }
.xp-toast-amount { font-family: 'Space Grotesk', sans-serif; font-size: 1.2rem; font-weight: 700; color: var(--warning); }
.xp-toast-reason { font-size: 0.8rem; color: var(--text-muted); }

footer { text-align: center; padding: 2rem 0; color: var(--text-muted); border-top: 1px solid var(--glass-border); margin-top: 4rem; }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .sidebar-toggle { display: block; }
    .main-wrapper { margin-left: 0; }
    .tech-grid, .concept-grid { grid-template-columns: 1fr 1fr; }
    .sim-split { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .grid-2-cols, .tech-grid, .concept-grid { grid-template-columns: 1fr; }
    .title { font-size: 2rem; }
    .section-card { padding: 1.5rem; }
    .hero-stats { flex-direction: column; gap: 1rem; }
    .content { padding: 1rem; }
    .top-header { padding: 0.75rem 1rem; }
}

/* ANIMATIONS */
.section-card, .simulator-card, .concept-card { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.section-card.animate-in, .simulator-card.animate-in, .concept-card.animate-in { opacity: 1; transform: translateY(0); }

/* ============================================
   CODE BLOCKS WITH FILE HEADER
   Patron: header con ruta + codigo formateado
   ============================================ */

.code-block-wrapper {
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.3);
}

.code-file-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1rem;
    background: rgba(30, 41, 59, 0.9);
    border-bottom: 1px solid var(--glass-border);
    font-size: 0.8rem;
}

.file-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.file-icon {
    font-size: 1rem;
    opacity: 0.8;
}

.file-path {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-primary);
    font-weight: 500;
}

.lang-badge {
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.file-header-right {
    display: flex;
    align-items: center;
}

.file-title {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-style: italic;
}

.code-block-wrapper pre {
    margin: 0 !important;
    border: none !important;
    border-radius: 0 !important;
    background: rgba(0, 0, 0, 0.4) !important;
}

.code-block-wrapper pre code {
    font-size: 0.82rem !important;
    line-height: 1.5 !important;
}

.code-block-wrapper .copy-btn {
    top: 0.4rem;
    right: 0.4rem;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
}

.code-block-wrapper .copy-btn.copied {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

/* Code container for dynamic rendering */
.code-container {
    margin-top: 1.5rem;
}

/* Inline code reference (muestra ruta sin bloque) */
.file-reference {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.6rem;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-primary);
    margin: 0.5rem 0;
}

.file-reference .file-ref-icon {
    font-size: 0.9rem;
}

/* ============================================
   LIFECYCLE SIMULATOR
   ============================================ */

.lifecycle-step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.lifecycle-step.active {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--accent-primary);
    transform: translateX(10px);
}

.step-number {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
}

.step-content strong {
    display: block;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.step-content p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
}

/* ============================================
   ARCHITECTURE SIMULATOR (Drag & Drop)
   ============================================ */

.drop-zone {
    min-height: 80px;
    padding: 1rem;
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.drop-zone:hover {
    border-color: var(--accent-primary);
    background: rgba(56, 189, 248, 0.05);
}

.zone-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.zone-content {
    min-height: 40px;
}

.arch-item {
    padding: 0.6rem 1rem;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: var(--radius-sm);
    cursor: grab;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-primary);
    transition: all 0.3s ease;
    user-select: none;
}

.arch-item:active {
    cursor: grabbing;
}

.arch-item[draggable="false"] {
    cursor: default;
    opacity: 0.7;
}

/* ============================================
   CRUD SIMULATOR
   ============================================ */

.crud-form input {
    width: 100%;
}

.crud-table {
    overflow-x: auto;
}

.crud-console {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.crud-console div {
    padding: 0.2rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* ============================================
   SECURITY SIMULATOR
   ============================================ */

#security-raw,
#security-pydantic {
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.8rem;
}

/* ============================================
   VICTORY MODAL
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    max-width: 500px;
    width: 90%;
    padding: 2.5rem;
    text-align: center;
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    margin-bottom: 1.5rem;
}

.modal-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
    animation: bounce 1s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.modal-header h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--success));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-body {
    margin-bottom: 2rem;
}

.modal-stats {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.modal-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.modal-stat {
    text-align: center;
}

.modal-stat-number {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.modal-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.modal-message {
    color: var(--text-main);
    font-size: 1rem;
    line-height: 1.6;
}

.modal-footer {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* ============================================
   NEXT BUTTON (Sequential Navigation)
   ============================================ */

.next-button-container {
    display: flex;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.btn-next {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.btn-next:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.4);
}

.btn-next::after {
    content: '→';
    font-size: 1.2rem;
}


/* ============================================================
   🎨 ESTILOS PARA SIMULADORES INTERACTIVOS
   ============================================================ */

.sim-body {
  padding: 24px;
}

.sim-preview {
  margin-top: 15px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.sim-result {
  padding: 15px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 15px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 11px;
  border-radius: var(--radius-sm);
}

.quiz-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.debug-card {
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.debug-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 15px;
}

.debug-task {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.debug-task:hover {
  background: var(--accent-flask-glow);
  border-color: var(--accent-flask);
  color: var(--text-primary);
}

.lifecycle-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 15px 0;
}

.lifecycle-step {
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
}

.lifecycle-step.active {
  background: var(--accent-flask-glow);
  border-color: var(--accent-flask);
  color: #fff;
  box-shadow: 0 0 15px rgba(0, 212, 170, 0.2);
}

.arch-card {
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.arch-items {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.arch-item {
  padding: 8px 16px;
  background: var(--bg-code);
  border: 1px solid var(--border-accent);
  color: var(--accent-flask);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  cursor: grab;
  transition: var(--transition);
}

.arch-item:active {
  cursor: grabbing;
}

.arch-drop-zones {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.drop-zone {
  min-height: 55px;
  padding: 10px;
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  background: rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
}

.drop-zone::before {
  content: attr(data-layer);
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.15);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.crud-form {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.01);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.crud-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
  font-size: 13px;
}

.crud-table th, .crud-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.crud-table th {
  color: var(--text-primary);
  font-weight: 600;
  background: rgba(255,255,255,0.02);
}

.crud-table td {
  color: var(--text-secondary);
}

.crud-console {
  background: #030712;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent-flask);
  min-height: 80px;
  margin-top: 15px;
}

.tx-step {
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  font-size: 12px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.tx-step.completed {
  border-color: var(--accent-green);
  background: rgba(34, 197, 94, 0.05);
  color: var(--text-primary);
}

.tx-step.failed {
  border-color: var(--accent-red);
  background: rgba(239, 68, 68, 0.05);
  color: var(--text-primary);
}

.validation-error {
  color: var(--accent-red);
  font-weight: 600;
  font-size: 12px;
}

.validation-ok {
  color: var(--accent-green);
  font-weight: 600;
  font-size: 12px;
}

.stat-success {
  color: var(--accent-green);
  font-weight: 700;
}

.sim-editor-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 15px;
}

/* === CONTROLES AVANZADOS DE SIMULADORES (SELECTS, CHECKBOXES Y LABELS) === */

.sim-select {
  appearance: none !important;
  -webkit-appearance: none !important;
  background: rgba(0, 0, 0, 0.45) url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300d4aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") no-repeat right 16px center !important;
  background-size: 16px !important;
  padding: 12px 40px 12px 16px !important;
  border: 1px solid var(--border-accent) !important;
  color: #fff !important;
  border-radius: var(--radius-md) !important;
  font-family: 'Space Grotesk', sans-serif !important;
  font-size: 13px !important;
  font-weight: 600 !important;
  cursor: pointer !important;
  outline: none !important;
  transition: var(--transition) !important;
}

.sim-select:hover {
  border-color: var(--accent-flask) !important;
  box-shadow: 0 0 10px rgba(0, 212, 170, 0.2) !important;
}

.sim-select:focus {
  border-color: var(--accent-flask) !important;
  box-shadow: 0 0 15px rgba(0, 212, 170, 0.3) !important;
}

/* Checkboxes personalizados en simuladores */
.sim-controls input[type="checkbox"] {
  appearance: none !important;
  -webkit-appearance: none !important;
  width: 18px !important;
  height: 18px !important;
  border: 1px solid var(--border-accent) !important;
  border-radius: 4px !important;
  background: rgba(0, 0, 0, 0.45) !important;
  cursor: pointer !important;
  position: relative !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  transition: var(--transition) !important;
  margin: 0 !important;
  vertical-align: middle !important;
}

.sim-controls input[type="checkbox"]:checked {
  background: var(--accent-flask) !important;
  border-color: var(--accent-flask) !important;
  box-shadow: 0 0 8px rgba(0, 212, 170, 0.4) !important;
}

.sim-controls input[type="checkbox"]:checked::after {
  content: '✓' !important;
  color: var(--bg-primary) !important;
  font-size: 12px !important;
  font-weight: 900 !important;
  position: absolute !important;
}

.sim-controls input[type="checkbox"]:disabled {
  opacity: 0.4 !important;
  cursor: not-allowed !important;
}

/* Tarjetas para dependencias en simuladores */
.sim-controls label:has(input[type="checkbox"]) {
  display: flex !important;
  align-items: center !important;
  gap: 12px !important;
  cursor: pointer !important;
  padding: 10px 14px !important;
  background: rgba(255, 255, 255, 0.02) !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  border-radius: var(--radius-md) !important;
  transition: var(--transition) !important;
  font-size: 13px !important;
  color: var(--text-secondary) !important;
  user-select: none !important;
}

.sim-controls label:has(input[type="checkbox"]):hover {
  background: rgba(0, 212, 170, 0.04) !important;
  border-color: rgba(0, 212, 170, 0.2) !important;
  color: var(--text-primary) !important;
  transform: translateX(4px) !important;
}

.sim-controls label:has(input[type="checkbox"]:checked) {
  border-color: rgba(0, 212, 170, 0.3) !important;
  background: rgba(0, 212, 170, 0.02) !important;
  color: var(--text-primary) !important;
}

/* Títulos de controles */
.sim-controls > label:not(:has(input)) {
  font-family: 'Outfit', sans-serif !important;
  font-size: 11px !important;
  font-weight: 700 !important;
  color: var(--accent-flask) !important;
  text-transform: uppercase !important;
  letter-spacing: 1px !important;
  margin-top: 15px !important;
  margin-bottom: 5px !important;
  display: block !important;
}

.sim-controls > label:not(:has(input)):first-of-type {
  margin-top: 0 !important;
}

/* === PRESENTACIÓN Y RESETEO DE CÓDIGO (PRE & PRISM) === */

.sim-output pre.hljs-pre code {
  display: block !important;
  background: transparent !important;
  padding: 0 !important;
  margin: 0 !important;
  max-height: none !important;
  overflow: visible !important;
  width: 100% !important;
}

/* Reseteo preventivo de tokens de Prism para evitar colisiones con clases CSS de la UI */
.token.tag,
.token.keyword,
.token.builtin,
.token.string,
.token.number,
.token.comment,
.token.function,
.token.class-name,
.token.decorator,
.token.attr-name,
.token.parameter,
.token.boolean,
.token.variable,
.token.attr-value,
.token.punctuation,
.token.operator,
.token.selector {
  background: transparent !important;
  padding: 0 !important;
  border-radius: 0 !important;
  border: none !important;
  box-shadow: none !important;
}

/* === RE-ESTILIZACIÓN DE TARJETAS DE CONCEPTOS (GENERAL) === */
.concept-card {
  background: rgba(13, 17, 23, 0.45) !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  border-radius: var(--radius-lg) !important;
  padding: 24px !important;
  transition: var(--transition) !important;
  cursor: default !important;
  backdrop-filter: blur(var(--glass-blur)) !important;
  -webkit-backdrop-filter: blur(var(--glass-blur)) !important;
  box-shadow: var(--shadow-card) !important;
  position: relative !important;
  overflow: hidden !important;
}

.concept-card:hover {
  transform: translateY(-4px) !important;
  border-color: rgba(255, 255, 255, 0.1) !important;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5) !important;
  background: rgba(13, 17, 23, 0.65) !important;
}

/* === TARJETAS METODOS HTTP PREMIUM === */
.concept-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
}

.concept-verb {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* GET */
.concept-card.get {
  border-left: 4px solid var(--accent-green) !important;
}
.concept-card.get:hover {
  border-color: rgba(34, 197, 94, 0.3) !important;
  border-left-color: var(--accent-green) !important;
  box-shadow: 0 8px 30px rgba(34, 197, 94, 0.12) !important;
}
.concept-card.get .concept-verb {
  color: var(--accent-green);
}

/* POST */
.concept-card.post {
  border-left: 4px solid var(--accent-flask) !important;
}
.concept-card.post:hover {
  border-color: rgba(0, 212, 170, 0.3) !important;
  border-left-color: var(--accent-flask) !important;
  box-shadow: 0 8px 30px rgba(0, 212, 170, 0.12) !important;
}
.concept-card.post .concept-verb {
  color: var(--accent-flask);
}

/* PUT */
.concept-card.put {
  border-left: 4px solid var(--accent-yellow) !important;
}
.concept-card.put:hover {
  border-color: rgba(245, 158, 11, 0.3) !important;
  border-left-color: var(--accent-yellow) !important;
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.12) !important;
}
.concept-card.put .concept-verb {
  color: var(--accent-yellow);
}

/* DELETE */
.concept-card.delete {
  border-left: 4px solid var(--accent-red) !important;
}
.concept-card.delete:hover {
  border-color: rgba(239, 68, 68, 0.3) !important;
  border-left-color: var(--accent-red) !important;
  box-shadow: 0 8px 30px rgba(239, 68, 68, 0.12) !important;
}
.concept-card.delete .concept-verb {
  color: var(--accent-red);
}


/* === ESTILIZACIÓN DE TARJETAS DE DEPENDENCIAS CON COLORES (PREMIUM) === */

.dep-card {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 12px !important;
  cursor: pointer !important;
  padding: 10px 14px !important;
  background: rgba(255, 255, 255, 0.02) !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  border-radius: var(--radius-md) !important;
  transition: var(--transition) !important;
  font-size: 13px !important;
  color: var(--text-secondary) !important;
  user-select: none !important;
  position: relative !important;
}

.dep-card:hover {
  background: rgba(255, 255, 255, 0.04) !important;
  transform: translateX(4px) !important;
}

.dep-badge {
  font-family: 'Space Grotesk', sans-serif !important;
  font-size: 9px !important;
  font-weight: 700 !important;
  padding: 2px 6px !important;
  border-radius: 4px !important;
  letter-spacing: 0.5px !important;
}

/* WEB - Azul */
.dep-card.dep-web {
  border-left: 3px solid #3b82f6 !important;
}
.dep-card.dep-web:hover,
.dep-card.dep-web:has(input[type="checkbox"]:checked) {
  border-color: #3b82f6 !important;
  background: rgba(59, 130, 246, 0.03) !important;
  color: var(--text-primary) !important;
}
.dep-card.dep-web .dep-badge {
  background: rgba(59, 130, 246, 0.1) !important;
  color: #3b82f6 !important;
}
.dep-card.dep-web input[type="checkbox"]:checked {
  background: #3b82f6 !important;
  border-color: #3b82f6 !important;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.4) !important;
}

/* DATA - Verde */
.dep-card.dep-data {
  border-left: 3px solid #22c55e !important;
}
.dep-card.dep-data:hover,
.dep-card.dep-data:has(input[type="checkbox"]:checked) {
  border-color: #22c55e !important;
  background: rgba(34, 197, 94, 0.03) !important;
  color: var(--text-primary) !important;
}
.dep-card.dep-data .dep-badge {
  background: rgba(34, 197, 94, 0.1) !important;
  color: #22c55e !important;
}
.dep-card.dep-data input[type="checkbox"]:checked {
  background: #22c55e !important;
  border-color: #22c55e !important;
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.4) !important;
}

/* DB - Naranja */
.dep-card.dep-db {
  border-left: 3px solid #f59e0b !important;
}
.dep-card.dep-db:hover,
.dep-card.dep-db:has(input[type="checkbox"]:checked) {
  border-color: #f59e0b !important;
  background: rgba(245, 158, 11, 0.03) !important;
  color: var(--text-primary) !important;
}
.dep-card.dep-db .dep-badge {
  background: rgba(245, 158, 11, 0.1) !important;
  color: #f59e0b !important;
}
.dep-card.dep-db input[type="checkbox"]:checked {
  background: #f59e0b !important;
  border-color: #f59e0b !important;
  box-shadow: 0 0 8px rgba(245, 158, 11, 0.4) !important;
}

/* VALIDATION - Amarillo */
.dep-card.dep-val {
  border-left: 3px solid #eab308 !important;
}
.dep-card.dep-val:hover,
.dep-card.dep-val:has(input[type="checkbox"]:checked) {
  border-color: #eab308 !important;
  background: rgba(234, 179, 8, 0.03) !important;
  color: var(--text-primary) !important;
}
.dep-card.dep-val .dep-badge {
  background: rgba(234, 179, 8, 0.1) !important;
  color: #eab308 !important;
}
.dep-card.dep-val input[type="checkbox"]:checked {
  background: #eab308 !important;
  border-color: #eab308 !important;
  box-shadow: 0 0 8px rgba(234, 179, 8, 0.4) !important;
}

/* DEVTOOLS - Morado */
.dep-card.dep-dev {
  border-left: 3px solid #a855f7 !important;
}
.dep-card.dep-dev:hover,
.dep-card.dep-dev:has(input[type="checkbox"]:checked) {
  border-color: #a855f7 !important;
  background: rgba(168, 85, 247, 0.03) !important;
  color: var(--text-primary) !important;
}
.dep-card.dep-dev .dep-badge {
  background: rgba(168, 85, 247, 0.1) !important;
  color: #a855f7 !important;
}
.dep-card.dep-dev input[type="checkbox"]:checked {
  background: #a855f7 !important;
  border-color: #a855f7 !important;
  box-shadow: 0 0 8px rgba(168, 85, 247, 0.4) !important;
}


/* === VENTANA DE CÓDIGO PREMIUM (CODE-WINDOW) === */
.code-window {
  display: flex;
  flex-direction: column;
  background: var(--bg-code);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  height: 100%;
  flex-grow: 1;
}

.code-window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--glass-border);
}

.window-controls {
  display: flex;
  gap: 8px;
}

.control-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.control-dot.close { background-color: #ff5f56; }
.control-dot.minimize { background-color: #ffbd2e; }
.control-dot.maximize { background-color: #27c93f; }

.window-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.5px;
}

.window-actions {
  display: flex;
}

.btn-copy-code {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.btn-copy-code:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.code-window-body {
  flex-grow: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
}

.code-window-body pre.hljs-pre {
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
  background: transparent !important;
  padding: 16px 20px !important;
  height: auto !important;
  max-height: none !important;
  min-height: 0 !important;
  overflow: visible !important;
}

/* ============================================
   TARJETAS DE HERRAMIENTAS (utilidad y contexto)
   ============================================ */

.tool-section {
    margin: 2.5rem 0;
}

.tool-section-title,
.timeline-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent-primary);
    margin: 2rem 0 1.25rem;
}

.tool-section-title::before,
.timeline-title::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.6);
    flex-shrink: 0;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 1rem;
}

.tool-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.tool-card::after {
    content: '';
    position: absolute;
    inset: 0 0 auto 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
    opacity: 0.35;
}

.tool-card:hover {
    transform: translateY(-4px);
    border-color: rgba(56, 189, 248, 0.4);
}

.tool-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    font-size: 1.45rem;
    line-height: 1;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(129, 140, 248, 0.15));
    border: 1px solid rgba(56, 189, 248, 0.25);
    flex-shrink: 0;
    user-select: none;
}

.tool-card-name {
    margin: 0 0 0.25rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
}

.tool-card-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--accent-secondary);
    border: 1px solid rgba(129, 140, 248, 0.35);
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
}

.tool-card-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent-primary);
    margin: 0.65rem 0 0.3rem;
}

.tool-card-label.when {
    color: var(--warning);
}

.tool-card-text {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.55;
}

/* ============================================
   LINEA DE TIEMPO (historia de los temas)
   ============================================ */

.timeline-section {
    margin: 2.5rem 0;
}

.timeline {
    position: relative;
    padding-left: 1.75rem;
    margin: 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-primary), rgba(129, 140, 248, 0.25));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding: 0 0 1.5rem 1rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -1.75rem;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 2px solid var(--accent-primary);
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
}

.timeline-year {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: #0f172a;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    margin-bottom: 0.35rem;
}

.timeline-item-title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
}

.timeline-item-desc {
    margin: 0.25rem 0 0;
    font-size: 0.87rem;
    color: var(--text-muted);
    line-height: 1.55;
}

.timeline-body {
    flex: 1;
    min-width: 0;
}

/* ============================================
   PIE DE MODULO (completar + siguiente)
   ============================================ */

.module-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
    flex-wrap: wrap;
}

.mark-complete-btn {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(56, 189, 248, 0.15));
    border: 1px solid rgba(16, 185, 129, 0.35);
    color: #34d399;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.mark-complete-btn:hover:not(:disabled) {
    background: rgba(16, 185, 129, 0.3);
    border-color: #10b981;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
}

.mark-complete-btn.completed,
.mark-complete-btn:disabled {
    background: rgba(16, 185, 129, 0.12) !important;
    border-color: rgba(16, 185, 129, 0.25) !important;
    color: #6ee7b7 !important;
    opacity: 0.85;
    cursor: default;
    pointer-events: none;
    box-shadow: none !important;
    transform: none !important;
}

.btn-next {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #0b1120;
    padding: 0.65rem 1.35rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-next:hover {
    transform: translateX(3px) translateY(-1px);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.35);
}

.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.72rem;
    font-family: 'Inter', sans-serif;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.copy-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
}

/* ============================================
   PASO A PASO DIDACTICO (steps-section)
   ============================================ */

.steps-section {
    margin: 2.5rem 0;
}

.steps-section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.steps-section-intro {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.step-card {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.35rem;
    position: relative;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.step-card:hover {
    border-color: rgba(56, 189, 248, 0.35);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.85rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #0b1120;
    font-weight: 800;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: 0 2px 10px rgba(56, 189, 248, 0.3);
}

.step-header-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.step-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
}

.step-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.step-desc {
    margin: 0 0 0.85rem;
    font-size: 0.89rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.step-command-box {
    margin: 0.75rem 0;
    background: rgba(15, 23, 42, 0.75);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
}

.step-command-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
}

.step-command-code {
    margin: 0;
    padding: 0;
    background: transparent;
    border: none;
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 0.88rem;
    color: #38bdf8;
    white-space: pre-wrap;
    word-break: break-all;
}

.step-tip {
    margin-top: 0.75rem;
    padding: 0.6rem 0.85rem;
    background: rgba(34, 197, 94, 0.08);
    border-left: 3px solid #22c55e;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.84rem;
    color: #86efac;
    line-height: 1.5;
}

.step-tip strong {
    color: #4ade80;
}

.step-pitfall {
    margin-top: 0.65rem;
    padding: 0.6rem 0.85rem;
    background: rgba(239, 68, 68, 0.08);
    border-left: 3px solid #ef4444;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.84rem;
    color: #fca5a5;
    line-height: 1.5;
}

.step-pitfall strong {
    color: #f87171;
}

/* === SECUENCIADOR DE FASES SIMULATOR === */
.sim-phase-card:hover {
    background: rgba(56, 189, 248, 0.08) !important;
    border-color: rgba(56, 189, 248, 0.4) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.sim-slot:hover {
    border-color: rgba(56, 189, 248, 0.6) !important;
}

.sim-sequencer-wrapper {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
}