/* ==========================================================================
   1. VARIABLES CSS — MODO CLARO Y OSCURO
   ========================================================================== */
:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #334155;
    --text-heading: #0f172a;
    --border-color: #e2e8f0;

    --primary: #10b981;
    --blue-accent: #3b82f6;
    --indigo-accent: #6366f1;

    --max-width: 1140px;
    --font-stack: 'Inter', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --text-main: #94a3b8;
    --text-heading: #f1f5f9;
    --border-color: #334155;
}

/* ==========================================================================
   2. RESET Y BASE
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-stack);
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 0 1.5rem;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
}

/* ==========================================================================
   3. CABECERA Y BOTÓN DE TEMA
   ========================================================================== */
header.container {
    padding-top: 2.5rem;
    padding-bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header-top {
    width: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-bottom: 1.5rem;
}

#theme-toggle {
    cursor: pointer;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1.1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, border-color 0.2s, transform 0.2s;
    line-height: 1;
}

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

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2.5rem;
    width: 100%;
}

.logo-container a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem 2.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: 0 4px 24px -4px rgba(15, 23, 42, 0.06);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s ease,
                border-color 0.3s ease;
}

.logo-container a:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px -6px rgba(16, 185, 129, 0.18);
    border-color: var(--primary);
}

[data-theme="dark"] .logo-container a {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-color: #334155;
    box-shadow: 0 4px 24px -4px rgba(0, 0, 0, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

[data-theme="dark"] .logo-container a:hover {
    border-color: var(--primary);
    box-shadow: 0 12px 32px -6px rgba(16, 185, 129, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.logo-container img.site-logo {
    width: 100%;
    max-width: 240px;
    height: auto;
    object-fit: contain;
    display: block;
    user-select: none;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] .logo-container img.site-logo {
    filter: brightness(1.1);
}

/* ==========================================================================
   4. HERO SECTION
   ========================================================================== */
.hero-section {
    text-align: center;
    margin-bottom: 4rem;
}

.badge {
    display: inline-block;
    background-color: #dcfce7;
    color: #166534;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.3rem 0.9rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1.25rem;
}

[data-theme="dark"] .badge {
    background-color: #14532d;
    color: #86efac;
}

.hero-section h1 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--text-heading);
    letter-spacing: -0.04em;
    line-height: 1.15;
    margin-bottom: 1rem;
}

.hero-section p {
    color: var(--text-main);
    font-size: 1.1rem;
    max-width: 720px;
    margin: 0 auto;
    opacity: 0.85;
}

/* ==========================================================================
   5. BUSCADOR DE HERRAMIENTAS
   ========================================================================== */
.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 560px;
    margin: 0 auto 2.5rem auto;
}

.search-icon {
    position: absolute;
    left: 1.1rem;
    font-size: 1rem;
    pointer-events: none;
    opacity: 0.5;
}

.search-input {
    width: 100%;
    padding: 0.85rem 3rem 0.85rem 2.75rem;
    font-size: 1rem;
    font-family: var(--font-stack);
    color: var(--text-heading);
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 2px 12px -4px rgba(15, 23, 42, 0.06);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.search-input::placeholder { color: var(--text-muted, #94a3b8); }

.search-clear {
    position: absolute;
    right: 0.75rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted, #94a3b8);
    font-size: 0.9rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s, color 0.2s;
}

.search-clear:hover {
    background: var(--border-color);
    color: var(--text-heading);
}

.search-empty {
    text-align: center;
    color: var(--text-muted, #94a3b8);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .search-input {
    background: var(--bg-card);
    border-color: var(--border-color);
}

/* ==========================================================================
   6. GRID DE HERRAMIENTAS (Portal principal)
   ========================================================================== */
.tools-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 5rem;
}

@media (min-width: 640px) {
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .tools-grid { grid-template-columns: repeat(3, 1fr); }
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.25s ease;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px -8px rgba(15, 23, 42, 0.08);
    border-color: #94a3b8;
}

[data-theme="dark"] .tool-card:hover {
    border-color: #475569;
    box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.4);
}

.card-header-icon {
    font-size: 2rem;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    margin-bottom: 1.25rem;
    flex-shrink: 0;
}

.color-blue    { background-color: #eff6ff; }
.color-emerald { background-color: #ecfdf5; }
.color-indigo  { background-color: #e0e7ff; }
.color-cyan    { background-color: #ecfeff; color: #0891b2; }
.color-orange  { background-color: #fff7ed; color: #ea580c; }
.color-purple  { background-color: #f5f3ff; color: #4f46e5; }
.color-rose    { background-color: #fff1f2; color: #f43f5e; }
.color-amber   { background-color: #fffbeb; color: #d97706; }
.color-violet  { background-color: #faf5ff; color: #7c3aed; }

[data-theme="dark"] .color-blue    { background-color: #1e3a5f; }
[data-theme="dark"] .color-emerald { background-color: #14532d; }
[data-theme="dark"] .color-indigo  { background-color: #312e81; }
[data-theme="dark"] .color-cyan    { background-color: #164e63; }
[data-theme="dark"] .color-orange  { background-color: #7c2d12; }
[data-theme="dark"] .color-purple  { background-color: #2e1065; }
[data-theme="dark"] .color-rose    { background-color: #881337; }
[data-theme="dark"] .color-amber   { background-color: #78350f; }
[data-theme="dark"] .color-violet  { background-color: #4c1d95; }

.tool-card h2 {
    font-size: 1.15rem;
    color: var(--text-heading);
    font-weight: 700;
    margin-bottom: 0.65rem;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.tool-card p {
    color: var(--text-main);
    font-size: 0.9rem;
    margin-bottom: 1.75rem;
    flex-grow: 1;
    line-height: 1.65;
    opacity: 0.85;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-heading);
    border-top: 1px solid var(--border-color);
    padding-top: 1.1rem;
    transition: color 0.2s ease;
}

.card-footer .arrow {
    font-size: 1rem;
    transition: transform 0.2s ease;
}

.tool-card:hover .card-footer {
    color: var(--indigo-accent);
}

.tool-card:hover .card-footer .arrow {
    transform: translateX(5px);
}

/* ==========================================================================
   6. BLOQUE DE TRANSPARENCIA
   ========================================================================== */
.transparency-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin: 3rem 0 2rem 0;
    padding: 2rem;
    background-color: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: 16px;
}

@media (min-width: 768px) {
    .transparency-container { grid-template-columns: 1fr 1fr; }
}

.transparency-card {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.transparency-icon {
    font-size: 1.5rem;
    line-height: 1;
    padding: 0.5rem;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    flex-shrink: 0;
}

.transparency-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0.35rem;
}

.transparency-card p {
    font-size: 0.85rem;
    color: var(--text-main);
    line-height: 1.55;
    opacity: 0.85;
}

.transparency-card strong { color: var(--text-heading); }

.bmc-wrapper { margin-top: 1.25rem; }
.bmc-wrapper a {
    display: inline-block;
    transition: transform 0.2s ease, filter 0.2s ease;
}
.bmc-wrapper a:hover {
    transform: scale(1.04);
    filter: brightness(1.05);
}
.bmc-wrapper img {
    height: 38px;
    width: auto;
    display: block;
}

/* ==========================================================================
   7. SECCIÓN SEO
   ========================================================================== */
.seo-section {
    border-top: 1px solid var(--border-color);
    padding-top: 4rem;
    padding-bottom: 4rem;
    max-width: 860px;
    margin: 0 auto;
}

.seo-section h2 {
    font-size: 1.5rem;
    color: var(--text-heading);
    margin-bottom: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.seo-section h3 {
    font-size: 1.1rem;
    color: var(--text-heading);
    margin-top: 2.25rem;
    margin-bottom: 0.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.seo-section p {
    font-size: 0.96rem;
    color: var(--text-main);
    margin-bottom: 1.4rem;
    opacity: 0.85;
}

.seo-section ul {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    font-size: 0.96rem;
    opacity: 0.85;
}

.seo-section li { margin-bottom: 0.6rem; }
.seo-section strong { color: var(--text-heading); opacity: 1; }

/* ==========================================================================
   8. FOOTER
   ========================================================================== */
footer {
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-main);
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 1.5rem;
    margin-top: auto;
    width: 100%;
    opacity: 0.7;
}

footer p { margin-bottom: 0.35rem; }

/* ==========================================================================
   BLOQUES DE ANUNCIO ADSENSE
   ========================================================================== */
.ad-wrapper {
    width: 100%;
    text-align: center;
    margin: 1.5rem 0;
}

.ad-wrapper.ad-hero {
    max-width: 728px;
    margin: 0 auto 1.5rem;
    min-height: 90px;
}

.ad-wrapper.ad-resultados {
    max-width: 336px;
    margin: 1.5rem auto 0;
    min-height: 280px;
}

.ad-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 4px;
    opacity: 0.6;
}

@media (max-width: 768px) {
    .ad-wrapper.ad-hero { min-height: 50px; }
    .ad-wrapper.ad-resultados { max-width: 100%; min-height: 250px; }
}

@media print {
    .ad-wrapper { display: none !important; }
}

/* ==========================================================================
   TOOLTIPS DE AYUDA
   ========================================================================== */
.tooltip-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-muted, #64748b);
    font-size: 0.65rem;
    font-weight: 800;
    cursor: help;
    flex-shrink: 0;
    transition: background 0.2s, color 0.2s;
    user-select: none;
    font-style: normal;
}

.tooltip-icon:hover,
.tooltip-icon:focus {
    background: var(--primary, #10b981);
    color: #fff;
    outline: none;
}

.tooltip-bubble {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: #1e293b;
    color: #f1f5f9;
    font-size: 0.78rem;
    font-weight: 400;
    line-height: 1.5;
    padding: 0.55rem 0.85rem;
    border-radius: 8px;
    width: 220px;
    box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.3);
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.18s ease, visibility 0.18s ease;
    z-index: 100;
    white-space: normal;
    text-align: left;
}

.tooltip-bubble::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: #1e293b;
}

.tooltip-icon:hover + .tooltip-bubble,
.tooltip-icon:focus + .tooltip-bubble,
.tooltip-wrapper:hover .tooltip-bubble {
    opacity: 1;
    visibility: visible;
}

[data-theme="dark"] .tooltip-bubble {
    background: #334155;
    box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .tooltip-bubble::after {
    border-top-color: #334155;
}