:root {
    --bg-primary: #0a0c10;
    --bg-secondary: #13161d;
    --bg-card: #181c25;
    --bg-card-hover: #1e2330;
    --text-primary: #e8edf5;
    --text-secondary: #a1aab8;
    --text-muted: #6b7280;
    --accent: #4da8da;
    --accent-glow: rgba(77, 168, 218, 0.25);
    --accent-2: #34d399;
    --danger: #f87171;
    --border: #252a35;
    --border-light: #2e3540;
    --radius-sm: 4px;  /* Reducido para un look más "IDE" */
    --radius: 8px;     /* Reducido de 12px a 8px */
    --radius-lg: 12px; /* Reducido de 18px a 12px */
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(77, 168, 218, 0.15);
    --transition: 0.25s ease;
    --max-width: 1200px;
    --header-height: 70px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   SISTEMA UNIFICADO DE BOTONES (CUADRADOS / ESTILO IDE)
   ========================================================================== */

/* 1. Base compartida (Alineación perfecta) */
.btn-header, .btn-header-outline, .btn-logout,
.btn-primary, .btn-outline, .btn-sm,
.btn-ide-primary, .btn-ide-secondary, 
.btn-tiny, .btn-tiny-danger, 
.btn-copy-citation, .btn-ide-danger-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-align: center;
    text-decoration: none;
    font-family: inherit;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition);
    outline: none;
    border: 2px solid transparent;
    border-radius: var(--radius-sm); /* Todos los botones cuadrados (4px) */
}

/* 2. Tamaños estandarizados por categorías */

/* Botones Grandes (Hero, Formularios principales) */
.btn-primary, .btn-outline {
    padding: 0.7rem 1.6rem; 
    font-weight: 600; 
    font-size: 0.95rem;
}

/* Botones Medianos (Header, IDE, Acciones secundarias) */
.btn-header, .btn-header-outline, .btn-logout, 
.btn-sm, .btn-ide-primary, .btn-ide-secondary {
    padding: 0.5rem 1.2rem; 
    font-weight: 600; 
    font-size: 0.85rem; 
    border-width: 1px;
}

/* Botones Pequeños (Tarjetas, Citas, Editar/Eliminar) - ¡MISMAS DIMENSIONES! */
.btn-tiny, .btn-tiny-danger, .btn-copy-citation {
    padding: 0.4rem 0.8rem; 
    font-weight: 600; 
    font-size: 0.8rem; 
    border-width: 1px;
}

/* Botones de solo ícono */
.btn-ide-danger-icon {
    padding: 0.5rem; 
    font-size: 1rem; 
    border-width: 1px;
}

/* 3. Colores y efectos (Hover) */
.btn-primary { background: var(--accent); color: #0a0c10; box-shadow: 0 4px 20px rgba(77, 168, 218, 0.2); }
.btn-primary:hover { background: transparent; color: var(--accent); border-color: var(--accent); box-shadow: var(--shadow-glow); }

.btn-outline { background: transparent; border-color: var(--border-light); color: var(--text-primary); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(77, 168, 218, 0.05); }

.btn-header { background: var(--accent); color: #0a0c10; }
.btn-header:hover { background: transparent; color: var(--accent); border-color: var(--accent); box-shadow: var(--shadow-glow); }

.btn-header-outline { background: transparent; border-color: var(--border-light); color: var(--text-secondary); }
.btn-header-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-logout { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-logout:hover { background: var(--danger); color: #0a0c10; }

.btn-sm { background: var(--accent); color: #0a0c10; border-color: var(--accent); }
.btn-sm:hover { background: transparent; color: var(--accent); border-color: var(--accent); }

.btn-ide-primary { background: var(--accent-2); color: #0a0c10; border-color: var(--accent-2); }
.btn-ide-primary:hover { background: transparent; color: var(--accent-2); }

.btn-ide-secondary { background: transparent; color: var(--text-secondary); border-color: var(--border-light); }
.btn-ide-secondary:hover { color: var(--text-primary); border-color: var(--text-secondary); }

.btn-tiny { background: var(--bg-secondary); color: var(--text-secondary); border-color: var(--border-light); }
.btn-tiny:hover { color: var(--accent); border-color: var(--accent); background: rgba(77, 168, 218, 0.05); }

.btn-tiny-danger { background: var(--bg-secondary); color: var(--text-secondary); border-color: var(--border-light); }
.btn-tiny-danger:hover { color: var(--danger); border-color: var(--danger); background: rgba(248, 113, 113, 0.08); }

.btn-copy-citation { background: transparent; color: var(--text-secondary); border-color: var(--border-light); }
.btn-copy-citation:hover { color: var(--text-primary); border-color: var(--accent); background: rgba(77, 168, 218, 0.05); }

.btn-ide-danger-icon { background: transparent; color: var(--text-muted); border-color: transparent; }
.btn-ide-danger-icon:hover { color: var(--danger); background: rgba(248, 113, 113, 0.1); border-color: rgba(248, 113, 113, 0.3); }

/* 4. EL PARCHE MÁGICO PARA RAILS */
form.button_to,
.admin-actions form,
.ide-actions-bar form,
.media-list-actions form,
.tree-post form {
    display: contents;
}

.admin-actions { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 0.6rem; margin-top: 0.8rem; }
.ide-actions-bar { display: flex; gap: 0.8rem; padding-bottom: 0.5rem; align-items: center; flex-wrap: wrap; }


/* ==========================================================================
   ESTRUCTURA GENERAL (HEADER, HERO, ETC)
   ========================================================================== */

/* HEADER */
header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(10, 12, 16, 0.82);
    backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
    display: flex; align-items: center;
}
.header-inner {
    width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 1.8rem;
    display: flex; align-items: center; justify-content: space-between;
}
.logo {
    font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 1.3rem;
    color: var(--text-primary); text-decoration: none; letter-spacing: -0.5px;
    display: flex; align-items: center; gap: 0.45rem;
}
.logo i { color: var(--accent); font-size: 1.35rem; }
.logo span { color: var(--accent); }
nav { display: flex; gap: 2rem; align-items: center; }
nav a {
    text-decoration: none; color: var(--text-secondary); font-weight: 500; font-size: 0.95rem;
    transition: color var(--transition); position: relative; padding: 0.3rem 0;
}
nav a::after {
    content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
    background: var(--accent); border-radius: 2px; transition: width var(--transition);
}
nav a:hover, nav a.active { color: var(--text-primary); }
nav a:hover::after, nav a.active::after { width: 100%; }
.admin-menu { display: flex; align-items: center; gap: 0.6rem; }

/* FLASH */
.flash {
    max-width: var(--max-width); margin: 1rem auto 0; padding: 0.8rem 1.4rem; border-radius: var(--radius-sm);
    font-size: 0.9rem; display: flex; align-items: center; gap: 0.6rem;
}
.flash-notice { background: rgba(52, 211, 153, 0.1); color: var(--accent-2); border: 1px solid rgba(52, 211, 153, 0.3); }
.flash-alert { background: rgba(248, 113, 113, 0.1); color: var(--danger); border: 1px solid rgba(248, 113, 113, 0.3); }

/* HERO */
.hero { max-width: var(--max-width); margin: 0 auto; padding: 5rem 1.8rem 4rem; text-align: center; }
.hero-badge {
    display: inline-block; background: rgba(77, 168, 218, 0.1); border: 1px solid rgba(77, 168, 218, 0.3);
    color: var(--accent); padding: 0.4rem 1.2rem; border-radius: 50px; font-size: 0.85rem; font-weight: 500; margin-bottom: 1.8rem;
}
.hero h1 { font-size: clamp(2.4rem, 6vw, 3.6rem); font-weight: 700; line-height: 1.2; margin-bottom: 1rem; letter-spacing: -1px; }
.hero h1 .highlight {
    background: linear-gradient(135deg, var(--accent), #60c0f0);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-subtitle { font-size: 1.2rem; color: var(--text-secondary); max-width: 620px; margin: 0 auto 2.2rem; }
.hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.7rem; margin-bottom: 2.8rem; }
.hero-tags span {
    background: var(--bg-card); border: 1px solid var(--border-light); padding: 0.45rem 1.1rem; border-radius: 50px;
    font-size: 0.85rem; color: var(--text-secondary); font-weight: 500; transition: all var(--transition);
}
.hero-tags span i { margin-right: 0.35rem; color: var(--accent); font-size: 0.75rem; }
.hero-tags span:hover { border-color: var(--accent); color: var(--text-primary); background: var(--bg-card-hover); }

/* SECTIONS */
section { max-width: var(--max-width); margin: 0 auto; padding: 3rem 1.8rem 4rem; }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2.2rem; flex-wrap: wrap; gap: 1rem; }
.section-header h2 { font-size: 1.8rem; font-weight: 700; letter-spacing: -0.5px; display: flex; align-items: center; gap: 0.6rem; }
.section-header h2 i { color: var(--accent); font-size: 1.5rem; }
.link-more { color: var(--accent); text-decoration: none; font-weight: 500; font-size: 0.95rem; display: flex; align-items: center; gap: 0.35rem; }
.link-more:hover { color: #60c0f0; }
.link-more i { font-size: 0.8rem; transition: transform var(--transition); }
.link-more:hover i { transform: translateX(3px); }
.empty-state { color: var(--text-muted); font-style: italic; }

/* ABOUT */
.about-home, .about-full .about-home {
    display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center;
    background: var(--bg-secondary); border-radius: var(--radius-lg); padding: 2.5rem 2.8rem;
    border: 1px solid var(--border); box-shadow: var(--shadow-card);
}
.about-img-wrapper {
    position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5); border: 1px solid var(--border-light);
}
.about-img-wrapper img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.5s ease; }
.about-img-wrapper:hover img { transform: scale(1.03); }
.about-img-overlay {
    position: absolute; bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(10, 12, 16, 0.85));
    padding: 1.5rem 1.2rem 1rem; font-size: 0.8rem; color: var(--text-muted);
}
.about-content h3 { font-size: 1.6rem; font-weight: 700; margin-bottom: 0.8rem; letter-spacing: -0.4px; }
.about-content .role { color: var(--accent); font-weight: 600; font-size: 0.95rem; display: block; margin-bottom: 1rem; }
.about-content p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 0.98rem; }

/* BLOG CARDS */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.blog-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.6rem;
    transition: all var(--transition); box-shadow: var(--shadow-card); display: flex; flex-direction: column;
}
.blog-card:hover { border-color: var(--accent); background: var(--bg-card-hover); transform: translateY(-3px); }
.blog-card .date { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.6rem; font-family: 'JetBrains Mono', monospace; }
.draft-badge { color: var(--danger); font-style: normal; margin-left: 0.4rem; }
.blog-card h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; line-height: 1.4; }
.blog-card h4 a { color: var(--text-primary); text-decoration: none; }
.blog-card h4 a:hover { color: var(--accent); }
.blog-card p { color: var(--text-secondary); font-size: 0.9rem; flex-grow: 1; margin-bottom: 1rem; }
.blog-card .tag {
    display: inline-block; background: rgba(77, 168, 218, 0.1); color: var(--accent); padding: 0.25rem 0.7rem;
    border-radius: var(--radius-sm); font-size: 0.75rem; font-weight: 500; align-self: flex-start;
}

/* PROJECTS */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.project-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
    transition: all var(--transition); box-shadow: var(--shadow-card); display: flex; flex-direction: column;
}
.project-card:hover { border-color: var(--accent-2); transform: translateY(-3px); }
.project-img {
    width: 100%; aspect-ratio: 16/10; background: var(--bg-secondary); display: flex; align-items: center;
    justify-content: center; font-size: 2.5rem; color: var(--text-muted); border-bottom: 1px solid var(--border); overflow: hidden;
}
.project-img img { width: 100%; height: 100%; object-fit: cover; }
.project-info { padding: 1.3rem 1.4rem 1.5rem; flex-grow: 1; display: flex; flex-direction: column; }
.project-info h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.4rem; }
.project-info h4 a { color: var(--text-primary); text-decoration: none; }
.project-info h4 a:hover { color: var(--accent); }
.project-info p { font-size: 0.85rem; color: var(--text-secondary); flex-grow: 1; margin-bottom: 0.8rem; }
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.project-tech span {
    background: var(--bg-secondary); color: var(--text-secondary); padding: 0.2rem 0.6rem; border-radius: var(--radius-sm);
    font-size: 0.72rem; font-family: 'JetBrains Mono', monospace; border: 1px solid var(--border-light);
}

/* SINGLE PAGE (post/proyecto) */
.single-page { max-width: 800px; width: 100%; }
.single-header { text-align: center; margin-bottom: 2rem; }
.single-header .date { font-family: 'JetBrains Mono', monospace; color: var(--text-muted); font-size: 0.85rem; }
.single-header h1 { font-size: 2.2rem; margin: 0.8rem 0; letter-spacing: -0.5px; }
.single-desc { color: var(--text-secondary); font-size: 1.05rem; }
.single-image { border-radius: var(--radius); overflow: hidden; margin-bottom: 2rem; border: 1px solid var(--border-light); }
.single-image img { width: 100%; display: block; }
.single-admin-actions { margin-top: 2.5rem; display: flex; gap: 0.8rem; justify-content: center; }

/* MARKDOWN CONTENT */
.markdown-body { font-size: 1.02rem; color: var(--text-primary); }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin-top: 2rem; margin-bottom: 0.8rem; letter-spacing: -0.3px; }
.markdown-body h1 { font-size: 1.8rem; } .markdown-body h2 { font-size: 1.5rem; } .markdown-body h3 { font-size: 1.25rem; }
.markdown-body p { margin-bottom: 1.2rem; color: var(--text-secondary); line-height: 1.8; }
.markdown-body a { color: var(--accent); }
.markdown-body ul, .markdown-body ol { margin: 0 0 1.2rem 1.4rem; color: var(--text-secondary); }
.markdown-body blockquote {
    border-left: 3px solid var(--accent); padding: 0.4rem 1.2rem; color: var(--text-secondary);
    background: var(--bg-secondary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-bottom: 1.2rem;
}
.markdown-body code {
    background: var(--bg-card); border: 1px solid var(--border-light); padding: 0.15rem 0.4rem;
    border-radius: var(--radius-sm); font-family: 'JetBrains Mono', monospace; font-size: 0.88em; color: var(--accent-2);
}
.markdown-body pre {
    background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 1.2rem; overflow-x: auto; margin-bottom: 1.2rem;
}
.markdown-body pre code { background: none; border: none; padding: 0; color: var(--text-primary); }

/* Para móviles: Hacer que las tablas hagan scroll horizontal si son muy anchas */
.markdown-body table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; display: block; overflow-x: auto; white-space: nowrap; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border-light); padding: 0.5rem 0.8rem; text-align: left; }
.markdown-body th { background: var(--bg-card); }
.markdown-body img { max-width: 100%; border-radius: var(--radius-sm); }

/* ADMIN FORMS */
.form-page { max-width: 760px; }
.admin-form { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem 2.2rem; }
.field { margin-bottom: 1.4rem; display: flex; flex-direction: column; gap: 0.5rem; }
.field label { font-weight: 600; font-size: 0.9rem; color: var(--text-secondary); }
.field input[type="text"], .field input[type="email"], .field input[type="password"],
.field input[type="number"], .field textarea, .field input[type="file"] {
    background: var(--bg-card); border: 1px solid var(--border-light); border-radius: var(--radius-sm);
    padding: 0.65rem 0.9rem; color: var(--text-primary); font-family: inherit; font-size: 0.95rem;
}
.field textarea { font-family: 'JetBrains Mono', monospace; font-size: 0.9rem; resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.field .hint { font-size: 0.8rem; color: var(--text-muted); margin: 0; }
.field.markdown-editor { gap: 0.3rem; }
.field.markdown-editor label { margin-bottom: 0.2rem; }
.current-image img, .current-image { max-width: 220px; border-radius: var(--radius-sm); margin-top: 0.5rem; border: 1px solid var(--border-light); }
.form-actions { display: flex; gap: 1rem; margin-top: 1.5rem; flex-wrap: wrap; }
.form-errors {
    background: rgba(248, 113, 113, 0.08); border: 1px solid rgba(248, 113, 113, 0.3); color: var(--danger);
    padding: 1rem 1.2rem; border-radius: var(--radius-sm); margin-bottom: 1.4rem; font-size: 0.9rem;
}
.form-errors ul { margin-left: 1.2rem; }

/* FOOTER */
footer { background: var(--bg-secondary); border-top: 1px solid var(--border); padding: 2.5rem 1.8rem; margin-top: 2rem; }
.footer-inner { max-width: var(--max-width); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem; }
.footer-links { display: flex; gap: 1.8rem; align-items: center; }
.footer-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; font-weight: 500; display: flex; align-items: center; gap: 0.4rem; }
.footer-links a:hover { color: var(--accent); }
.copyright { color: var(--text-muted); font-size: 0.85rem; }
.copyright span { color: var(--accent); }

/* ==========================================================================
   OVERLEAF IDE STYLE EDITOR (ADMIN FORMS)
   ========================================================================== */

.ide-fullscreen-wrapper {
    width: 100vw; position: relative; left: 50%; right: 50%; margin-left: -50vw; margin-right: -50vw; padding: 0;
}
.overleaf-ide-container {
    display: flex; flex-direction: column; width: 100%;
    height: calc(100vh - var(--header-height)); 
    background: var(--bg-primary); border-top: 1px solid var(--border); margin: 0; overflow: hidden;
}
.form-errors-banner {
    background: rgba(248, 113, 113, 0.1); border-bottom: 1px solid var(--danger); color: var(--danger);
    padding: 0.8rem 1.5rem; font-size: 0.85rem; flex-shrink: 0;
}
.ide-workspace {
    display: flex; width: 100%; flex: 1; overflow: hidden; border-bottom: 1px solid var(--border);
}
.overleaf-sidebar {
    width: 320px; background: var(--bg-secondary); border-right: 1px solid var(--border);
    padding: 1.5rem; display: flex; flex-direction: column; gap: 1.5rem; flex-shrink: 0; overflow-y: auto;
}
.sidebar-section-title {
    font-family: 'JetBrains Mono', monospace; font-size: 0.75rem; color: var(--accent);
    text-transform: uppercase; letter-spacing: 1px; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-light);
}
.sidebar-field { display: flex; flex-direction: column; gap: 0.5rem; }
.sidebar-field label { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); }
.sidebar-field input[type="text"], .sidebar-field textarea, .sidebar-field input[type="file"] {
    background: var(--bg-primary); border: 1px solid var(--border-light); border-radius: var(--radius-sm);
    padding: 0.6rem 0.8rem; color: var(--text-primary); font-size: 0.85rem; width: 100%; transition: all var(--transition);
}
.sidebar-field textarea { font-family: inherit; resize: vertical; }
.sidebar-field input:focus, .sidebar-field textarea:focus { outline: none; border-color: var(--accent); }
.sidebar-thumb-preview { margin-top: 0.4rem; border: 1px solid var(--border-light); border-radius: var(--radius-sm); overflow: hidden; max-width: 100px; }
.sidebar-thumb-preview img { width: 100%; display: block; }
.checkbox-field { flex-direction: row; align-items: center; gap: 0.6rem; background: var(--bg-primary); padding: 0.6rem 0.8rem; border-radius: var(--radius-sm); border: 1px solid var(--border-light); }
.checkbox-field input { accent-color: var(--accent); cursor: pointer; }

.overleaf-editor-zone { flex: 1; display: flex; flex-direction: column; background: var(--bg-primary); min-width: 0; }
.editor-top-toolbar {
    height: 40px; background: var(--bg-secondary); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between; padding: 0; flex-shrink: 0;
}
.file-tab {
    background: var(--bg-primary); color: var(--text-primary); padding: 0 1.5rem; height: 40px;
    display: flex; align-items: center; font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
    border-right: 1px solid var(--border); border-top: 2px solid var(--accent);
}
.toolbar-right { padding-right: 1.5rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.toolbar-right .hint-text { font-size: 0.75rem; color: var(--text-muted); }
.editor-textarea-wrapper { flex: 1; position: relative; width: 100%; }
.ide-textarea {
    position: absolute; top: 0; left: 0; right: 0; bottom: 0; width: 100%; height: 100%;
    background: transparent; border: none; resize: none; padding: 2rem; color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace; font-size: 0.95rem; line-height: 1.7; outline: none; overflow-y: auto;
}
.overleaf-bottom-tray {
    background: var(--bg-secondary); padding: 1rem 1.5rem; display: flex; justify-content: space-between;
    align-items: flex-end; gap: 2rem; flex-shrink: 0;
}

/* ==========================================================================
   BLOG TREE EXPLORER
   ========================================================================== */

.blog-tree-page .tree-search-wrapper { position: relative; margin-bottom: 1.6rem; }
.blog-tree-page .tree-search-icon { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.85rem; }
.blog-tree-page .tree-search-input {
  width: 100%; background: var(--bg-secondary); border: 1px solid var(--border-light); border-radius: var(--radius-sm);
  padding: 0.75rem 1rem 0.75rem 2.6rem; color: var(--text-primary); font-family: 'Inter', sans-serif; font-size: 0.95rem; transition: border-color var(--transition), box-shadow var(--transition);
}
.blog-tree-page .tree-search-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.blog-tree-page .tree-search-input::placeholder { color: var(--text-muted); }

.tree-explorer {
  background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.4rem 1.6rem; box-shadow: var(--shadow-card); font-family: 'JetBrains Mono', monospace; font-size: 0.92rem;
}
.tree-explorer .tree-list { list-style: none; margin: 0; padding-left: 1.35rem; border-left: 1px dashed var(--border-light); }
.tree-explorer > .tree-list { padding-left: 0; border-left: none; }
.tree-explorer .tree-list li { position: relative; margin: 0.15rem 0; padding: 0.15rem 0 0.15rem 0.4rem; }

.tree-explorer .tree-list > li > strong {
  display: inline-flex; align-items: center; gap: 0.5rem; font-family: 'Inter', sans-serif; font-weight: 600;
  font-size: 0.95rem; color: var(--text-primary); padding: 0.3rem 0.4rem; margin-left: -0.4rem; border-radius: var(--radius-sm);
  cursor: pointer; user-select: none; transition: background var(--transition);
}
.tree-explorer .tree-list > li > strong:hover { background: var(--bg-card-hover); }
.tree-explorer .tree-list > li > strong::before {
  content: "\f07c"; font-family: "Font Awesome 6 Free"; font-weight: 900; color: var(--accent); font-size: 0.85rem; flex-shrink: 0; transition: transform var(--transition);
}
.tree-explorer .tree-list > li > strong::after {
  content: "\f078"; font-family: "Font Awesome 6 Free"; font-weight: 900; font-size: 0.65rem; color: var(--text-muted); margin-left: 0.15rem; transition: transform var(--transition);
}
.tree-explorer .tree-list > li.is-collapsed > strong::before { content: "\f07b"; }
.tree-explorer .tree-list > li.is-collapsed > strong::after { transform: rotate(-90deg); }
.tree-explorer .tree-list > li.is-collapsed > .tree-list, .tree-explorer .tree-list > li.is-collapsed > .tree-post { display: none; }

.tree-explorer .tree-post {
  display: flex; align-items: center; gap: 0.55rem; padding: 0.4rem 0.6rem;
  margin: 0.1rem 0 0.1rem 1.35rem; border-radius: var(--radius-sm); transition: background var(--transition);
}
.tree-explorer .tree-post:hover { background: var(--bg-card-hover); }
.tree-explorer .tree-post::before {
  content: "\f15c"; font-family: "Font Awesome 6 Free"; font-weight: 900; color: var(--text-muted); font-size: 0.8rem; flex-shrink: 0;
}
.tree-explorer .tree-post a { color: var(--text-secondary); text-decoration: none; font-weight: 500; }
.tree-explorer .tree-post a:hover { color: var(--accent); }

.tree-explorer .draft-badge {
  font-family: 'Inter', sans-serif; font-size: 0.7rem; font-weight: 600; color: var(--danger);
  background: rgba(248, 113, 113, 0.1); border: 1px solid rgba(248, 113, 113, 0.3); padding: 0.1rem 0.5rem; border-radius: var(--radius-sm);
}

.tree-explorer .tree-post .admin-actions {
  margin-left: auto; opacity: 0; transition: opacity var(--transition);
}
.tree-explorer .tree-post:hover .admin-actions { opacity: 1; }
.tree-explorer .empty-state { font-family: 'Inter', sans-serif; padding: 0.5rem 0.2rem; }

/* ==========================================================================
   BLOQUE DE CITACIÓN BIBLIOGRÁFICA
   ========================================================================== */

.post-citation-card {
    position: relative; background: var(--bg-secondary); border: 1px solid var(--border-light);
    border-radius: var(--radius-sm); padding: 1.8rem 2rem; margin-top: 4rem; margin-bottom: 2rem;
    overflow: hidden; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.citation-content { position: relative; z-index: 2; }
.citation-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 0.8rem; }
.citation-title { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); margin: 0; line-height: 1.3; }
.citation-url { margin-bottom: 1.5rem; }
.citation-url .url-link {
    color: var(--accent); font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
    text-decoration: underline; text-decoration-color: transparent; transition: text-decoration-color var(--transition); word-break: break-all;
}
.citation-url .url-link:hover { text-decoration-color: var(--accent); }
.citation-metadata { display: flex; flex-wrap: wrap; gap: 2.5rem; border-top: 1px solid rgba(255, 255, 255, 0.05); padding-top: 1.2rem; }
.meta-group { display: flex; flex-direction: column; gap: 0.3rem; }
.meta-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.meta-value { font-size: 0.95rem; color: var(--text-primary); font-weight: 500; }
.license-link { color: var(--accent); text-decoration: none; }
.license-link:hover { text-decoration: underline; }
.bg-cc-icon {
    position: absolute; right: -20px; top: 50%; transform: translateY(-50%);
    font-size: 14rem; color: rgba(255, 255, 255, 0.02); z-index: 1; pointer-events: none;
}

/* ==========================================================================
   MEDIA LIST VIEW (ESTILO DRIVE/MEGA)
   ========================================================================== */
.media-list { display: flex; flex-direction: column; gap: 0.75rem; }
.media-list-row {
  display: flex; align-items: center; background-color: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: 8px; padding: 0.75rem 1rem; gap: 1.5rem; transition: border-color 0.2s, background-color 0.2s;
}
.media-list-row:hover { border-color: #8b949e; background-color: var(--bg-card-hover); }

.media-list-thumb {
  width: 140px; height: 90px; background-color: #010409; border-radius: 6px; overflow: hidden;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; border: 1px solid var(--border-light);
}
.media-list-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }

.media-list-info { flex-grow: 1; display: flex; flex-direction: column; gap: 0.4rem; min-width: 0; }
.media-filename { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.media-meta { font-size: 0.8rem; color: var(--text-muted); }

.media-list-snippet-container { flex-shrink: 0; width: 220px; }
.media-snippet {
  background-color: #0d1117; border: 1px solid var(--border-light); padding: 0.5rem 0.8rem; border-radius: var(--radius-sm);
  font-size: 0.8rem; display: flex; justify-content: space-between; align-items: center; cursor: pointer; transition: border-color 0.2s;
}
.media-snippet:hover { border-color: var(--accent); }
.media-snippet code { color: var(--accent); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-right: 10px; }

/* ==========================================================================
   RESPONSIVIDAD (MÓVILES Y TABLETS)
   ========================================================================== */

/* Tablets (iPad) */
@media (max-width: 992px) {
    .about-home, .about-full .about-home { gap: 2rem; padding: 2rem; }
}

/* Teléfonos Móviles (Galaxy S20, iPhone, etc) */
@media (max-width: 768px) {
    /* Ajustes generales de la página (El problema de la captura) */
    section { padding: 1.5rem 1rem 3rem; width: 100%; }
    .hero { padding: 3rem 1rem 2.5rem; width: 100%; }
    
    /* Header & Navbar */
    .header-inner { flex-direction: column; gap: 1rem; padding: 1rem; }
    header { height: auto; padding: 0.5rem 0; }
    nav { gap: 1.2rem; flex-wrap: wrap; justify-content: center; width: 100%; }

    /* ¡LA SOLUCIÓN DE LA SECCIÓN ABOUT! */
    .about-home, .about-full .about-home { 
        display: flex; /* Quitamos el grid que rompía el ancho */
        flex-direction: column; /* Apilamos imagen y texto */
        gap: 1.5rem; 
        padding: 1.5rem 1rem; /* Reducimos el padding interno para que respire */
        text-align: center; 
        width: 100%; 
    }
    .about-img-wrapper { 
        width: 100%;
        max-width: 320px; /* Evita que tu foto ocupe tooooda la pantalla verticalmente */
        margin: 0 auto; 
    }
    .about-content .role { display: inline-block; } 

    /* Hero & Sections */
    .hero h1 { font-size: 2.2rem; }
    .section-header { flex-direction: column; align-items: flex-start; gap: 0.8rem; }

    /* Post & Project Headers */
    .single-header h1 { font-size: 1.8rem; }
    .single-admin-actions { flex-direction: column; width: 100%; }
    
    /* Formularios Admin */
    .admin-form { padding: 1.5rem 1.2rem; }
    .form-actions { flex-direction: column; width: 100%; gap: 0.8rem; }
    .btn-outline { margin-left: 0; }
    
    /* Botones amigables para pulgares (Ocupan el ancho de la pantalla) */
    .btn-primary, .btn-outline, .btn-ide-primary, .btn-ide-secondary, .btn-sm, .btn-tiny, .btn-tiny-danger { 
        width: 100%; justify-content: center; 
    }
    .single-admin-actions .btn-sm, .single-admin-actions .btn-tiny-danger { width: 100%; }
    .admin-actions { flex-direction: column; width: 100%; align-items: stretch; }
    
    /* Footer */
    .footer-inner { flex-direction: column; text-align: center; gap: 1.2rem; }
    .footer-links { flex-direction: column; gap: 0.8rem; }
    
    /* IDE Mobile */
    .ide-workspace { flex-direction: column; }
    .overleaf-sidebar { width: 100%; height: 250px; border-right: none; border-bottom: 1px solid var(--border); }
    .overleaf-bottom-tray { flex-direction: column; align-items: stretch; }
    .ide-actions-bar { width: 100%; flex-direction: column; gap: 0.8rem; }
    
    /* Mostrar acciones admin de árbol siempre en móvil */
    .tree-explorer .tree-post .admin-actions { opacity: 1; flex-direction: row; margin-top: 0.5rem; }
    .tree-explorer .tree-post { flex-wrap: wrap; }
    
    /* Tabla de medios responsiva */
    .media-list-row { flex-direction: column; align-items: flex-start; gap: 1rem; position: relative; }
    .media-list-thumb { width: 100%; height: 160px; }
    .media-list-snippet-container { width: 100%; }
    .media-list-actions { position: absolute; top: 1rem; right: 1rem; background: var(--bg-card); border-radius: var(--radius-sm); }
}

@media (max-width: 600px) {
    .citation-metadata { flex-direction: column; gap: 1.2rem; }
    .bg-cc-icon { font-size: 10rem; right: -30px; }
}

@media (max-width: 480px) {
    .blog-grid, .projects-grid { grid-template-columns: 1fr; }
    .hero-tags span { font-size: 0.75rem; padding: 0.35rem 0.8rem; }
    .flash { flex-direction: column; text-align: center; }
}