/* ========================================
   Variables y reset
   ======================================== */
:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #555;
  --color-primary: #6c5ce7;
  --color-primary-hover: #5a4bd1;
  --color-accent: #00cec9;
  --color-border: #e0e0e0;
  --color-badge-gratis: #00b894;
  --color-badge-freemium: #6c5ce7;
  --color-badge-opensource: #e17055;
  --color-highlight: #fdcb6e;
  --color-nav-bg: #ffffff;
  --color-footer-bg: #1a1a2e;
  --color-footer-text: #ccc;
  --shadow-card: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 6px;
  --max-width: 1200px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --color-bg: #0f0f23;
  --color-surface: #1a1a2e;
  --color-text: #e0e0e0;
  --color-text-secondary: #aaa;
  --color-border: #2d2d44;
  --color-nav-bg: #16162b;
  --color-footer-bg: #0a0a1a;
  --shadow-card: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.4);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  height: auto;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* ========================================
   Header
   ======================================== */
.header {
  background: linear-gradient(135deg, var(--color-primary) 0%, #a29bfe 100%);
  color: #fff;
  text-align: center;
  padding: 2.5rem 1rem 2rem;
  position: relative;
}

.header__title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.header__subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  opacity: 0.9;
  margin-bottom: 0.8rem;
}

.header__counter {
  font-size: 0.9rem;
  opacity: 0.85;
  margin-bottom: 1.2rem;
}

/* Buscador */
.search-wrapper {
  max-width: 540px;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 1rem;
  transition: border-color var(--transition), background var(--transition);
}

.search-input::placeholder {
  color: rgba(255,255,255,0.7);
}

.search-input:focus {
  background: rgba(255,255,255,0.25);
  border-color: #fff;
  outline: none;
}

/* Tema toggle */
.theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255,255,255,0.2);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.theme-toggle:hover {
  background: rgba(255,255,255,0.35);
}

/* ========================================
   Navegación de categorías
   ======================================== */
.category-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.category-nav__list {
  display: flex;
  list-style: none;
  gap: 0;
  min-width: max-content;
  padding: 0;
  margin: 0;
}

.category-nav__item {
  flex-shrink: 0;
}

.category-nav__link {
  display: block;
  padding: 0.65rem 1rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition);
  text-decoration: none;
}

.category-nav__link:hover,
.category-nav__link:focus-visible {
  color: var(--color-primary);
  text-decoration: none;
}

.category-nav__link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

/* ========================================
   Main / Secciones
   ======================================== */
.main {
  padding: 2rem 0 3rem;
}

.category-section {
  margin-bottom: 3rem;
}

.category-section__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.category-section__emoji {
  font-size: 1.5rem;
}

.category-section__title {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--color-text);
}

.category-section__count {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-left: auto;
}

/* ========================================
   Grid de tarjetas
   ======================================== */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

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

@media (min-width: 960px) {
  .tools-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   Tarjeta de herramienta
   ======================================== */
.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.2rem;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tool-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.tool-card--destacado {
  border-color: var(--color-highlight);
  box-shadow: 0 0 0 2px var(--color-highlight), var(--shadow-card);
}

.tool-card__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tool-card__name {
  font-size: 1.05rem;
  font-weight: 700;
}

.tool-card__name a {
  color: var(--color-text);
  transition: color var(--transition);
}

.tool-card__name a:hover {
  color: var(--color-primary);
}

.tool-card__badge-destacado {
  font-size: 0.7rem;
  background: var(--color-highlight);
  color: #333;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-transform: uppercase;
}

.tool-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.tool-card__caso {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

.tool-card__badges {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: auto;
}

.badge {
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-transform: uppercase;
}

.badge--gratis {
  background: var(--color-badge-gratis);
  color: #fff;
}

.badge--freemium {
  background: var(--color-badge-freemium);
  color: #fff;
}

.badge--open-source {
  background: var(--color-badge-opensource);
  color: #fff;
}

.badge--idioma {
  background: var(--color-border);
  color: var(--color-text);
}

/* ========================================
   Estado vacío y error
   ======================================== */
.empty-state,
.error-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-secondary);
  font-size: 1.1rem;
}

/* ========================================
   Botón volver arriba
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 50;
}

.back-to-top:hover {
  transform: scale(1.1);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 2rem 1rem;
  text-align: center;
}

.footer__update {
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
}

.footer__links a {
  color: var(--color-footer-text);
  font-size: 0.85rem;
}

.footer__links a:hover {
  color: #fff;
}

.footer__link-btn {
  background: none;
  border: none;
  color: var(--color-footer-text);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: underline;
  font-family: inherit;
}

.footer__link-btn:hover {
  color: #fff;
}

.footer__suggest {
  font-size: 0.85rem;
}

.footer__suggest a {
  color: var(--color-accent);
}

/* ========================================
   Cookie banner
   ======================================== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-top: 2px solid var(--color-primary);
  padding: 1.2rem;
  z-index: 1000;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
}

.cookie-banner__content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  align-items: center;
  text-align: center;
}

.cookie-banner__content p {
  font-size: 0.9rem;
  color: var(--color-text);
}

.cookie-banner__actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.cookie-banner__link {
  font-size: 0.82rem;
}

/* Botones */
.btn {
  padding: 0.55rem 1.2rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  font-family: inherit;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--secondary {
  background: var(--color-border);
  color: var(--color-text);
}

.btn--secondary:hover {
  background: #ccc;
}

/* ========================================
   Ad slots
   ======================================== */
.ad-slot {
  text-align: center;
  min-height: 0;
  overflow: hidden;
}

/* ========================================
   Páginas legales
   ======================================== */
.legal-page {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem 1rem;
}

.legal-page h1 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.legal-page h2 {
  font-size: 1.3rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.legal-page p,
.legal-page li {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0.6rem;
}

.legal-page ul {
  padding-left: 1.5rem;
}

.legal-page a {
  color: var(--color-primary);
}

.legal-page table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.legal-page th,
.legal-page td {
  border: 1px solid var(--color-border);
  padding: 0.6rem;
  font-size: 0.9rem;
  text-align: left;
}

.legal-page th {
  background: var(--color-surface);
  font-weight: 600;
}

.legal-back {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

/* ========================================
   Responsive ajustes
   ======================================== */
@media (min-width: 640px) {
  .cookie-banner__content {
    flex-direction: row;
    text-align: left;
  }

  .cookie-banner__content p {
    flex: 1;
  }
}

@media (max-width: 639px) {
  .header {
    padding: 2rem 0.5rem 1.5rem;
  }

  .category-nav__link {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
  }

  .tool-card {
    padding: 1rem;
  }
}