/* =====================================================
   TECNIA PREMIUM CSS - versión limpia y diferencial
   Sustituye TODO el contenido de style.css por este archivo.
   Objetivo: web clara, tecnológica, legible y con contraste real.
===================================================== */

/* =========================
   VARIABLES
========================= */
:root {
  --bg-page: #eef3fb;
  --bg-page-2: #f8fbff;
  --bg-dark: #07111f;
  --bg-dark-2: #0f1e33;
  --bg-card: #ffffff;
  --bg-soft: #f6f9fe;

  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --cyan: #06b6d4;
  --mint: #14b8a6;
  --violet: #7c3aed;

  --text: #0f172a;
  --text-soft: #334155;
  --text-muted: #64748b;
  --text-white: #ffffff;
  --text-white-soft: #dbeafe;

  --border: #d9e2ef;
  --border-soft: #e8eef7;

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 38px;

  --shadow-sm: 0 8px 20px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 18px 45px rgba(15, 23, 42, 0.10);
  --shadow-lg: 0 28px 70px rgba(15, 23, 42, 0.18);

  --font-main: "Inter", "Segoe UI", Arial, sans-serif;
  --container-width: 1180px;
}

/* =========================
   RESET Y BASE
========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-main);
  color: var(--text);
  line-height: 1.7;
  background:
    radial-gradient(circle at 5% 0%, rgba(37, 99, 235, 0.16), transparent 34%),
    radial-gradient(circle at 95% 5%, rgba(20, 184, 166, 0.16), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, #eef3fb 42%, #eaf0f8 100%);
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(92%, var(--container-width));
  margin: 0 auto;
}

/* =========================
   NAVBAR
========================= */
header {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 17, 31, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.20);
}

.navbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(92%, var(--container-width));
  margin: 0 auto;
}

.logo {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: -0.6px;
  color: var(--text-white);
}

.logo span {
  color: var(--mint);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: #cbd5e1;
  font-weight: 650;
  font-size: 0.96rem;
  transition: 0.22s ease;
}

.nav-links a:hover {
  color: #ffffff;
}

/* =========================
   BOTONES
========================= */
.btn,
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 800;
  font-size: 0.98rem;
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), var(--mint));
  box-shadow: 0 14px 32px rgba(37, 99, 235, 0.24);
  transition: 0.22s ease;
}

.btn:hover,
.btn-primary:hover {
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.30);
}

.btn-outline {
  background: #ffffff;
  color: var(--blue-dark);
  border: 1px solid #bfdbfe;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.btn-outline:hover {
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  border-color: transparent;
}

/* =========================
   HERO HOME
========================= */
.hero {
  width: min(92%, var(--container-width));
  margin: 34px auto 22px;
  padding: 92px 30px 82px;
  text-align: center;
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  color: var(--text-white);
  background:
    linear-gradient(rgba(7, 17, 31, 0.76), rgba(7, 17, 31, 0.82)),
    radial-gradient(circle at 15% 20%, rgba(37, 99, 235, 0.55), transparent 26%),
    radial-gradient(circle at 85% 18%, rgba(20, 184, 166, 0.38), transparent 28%),
    linear-gradient(135deg, #07111f, #14233b 58%, #0f172a);
  box-shadow: var(--shadow-lg);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 8% -80px;
  height: 160px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.34), transparent 64%);
  filter: blur(10px);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  margin-bottom: 22px;
  padding: 8px 16px;
  border-radius: 999px;
  color: #67e8f9;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.17);
  font-size: 0.9rem;
  font-weight: 800;
}

.hero h1 {
  max-width: 930px;
  margin: 0 auto 24px;
  font-size: clamp(2.45rem, 6vw, 5rem);
  line-height: 1.05;
  letter-spacing: -2.3px;
  color: #ffffff;
}

.hero h1 span,
.text-gradient {
  background: linear-gradient(135deg, #60a5fa, #5eead4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  max-width: 760px;
  margin: 0 auto 36px;
  color: var(--text-white-soft);
  font-size: 1.18rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* =========================
   SECCIONES
========================= */
section {
  padding: 76px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 46px;
}

.section-title h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: -1.1px;
  margin-bottom: 13px;
  color: var(--text);
}

.section-title p,
.section-intro {
  color: var(--text-soft);
  max-width: 760px;
  margin: 0 auto 34px;
  text-align: center;
  line-height: 1.85;
  font-size: 1.05rem;
}

/* =========================
   GRID Y CARDS
========================= */
.grid {
  display: grid;
  gap: 24px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  display: block;
  overflow: hidden;
  position: relative;
  background: rgba(255, 255, 255, 0.96);
  color: var(--text);
  border: 1px solid rgba(217, 226, 239, 0.95);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: linear-gradient(90deg, var(--blue), var(--mint));
  opacity: 0.86;
}

.card:hover {
  transform: translateY(-7px);
  border-color: rgba(37, 99, 235, 0.38);
  box-shadow: 0 24px 55px rgba(15, 23, 42, 0.14);
}

.card h3 {
  color: var(--text);
  margin: 10px 0 10px;
  font-size: 1.32rem;
  line-height: 1.32;
}

.card p {
  color: var(--text-soft);
  line-height: 1.75;
}

.card strong {
  color: #0f172a;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  background: linear-gradient(135deg, #dbeafe, #ccfbf1);
  margin-bottom: 18px;
  font-size: 1.45rem;
}

.card-image {
  width: calc(100% + 56px);
  max-width: none;
  height: 190px;
  object-fit: cover;
  margin: -28px -28px 22px;
  border-radius: 0;
  box-shadow: none;
}

.article-card {
  padding: 0;
}

.article-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.article-content {
  padding: 24px;
}

.article-content h3 {
  margin-bottom: 10px;
}

.article-content p {
  color: var(--text-soft);
  margin-bottom: 16px;
}

.read-more {
  color: var(--blue-dark);
  font-weight: 800;
}

/* =========================
   PÁGINAS DE ARTÍCULOS
========================= */
.article-page {
  max-width: 940px;
  margin: 44px auto 60px;
  padding: 46px 42px;
  background: rgba(255, 255, 255, 0.97);
  color: var(--text);
  border: 1px solid rgba(217, 226, 239, 0.95);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.article-page h1 {
  font-size: clamp(2.15rem, 4vw, 3.25rem);
  line-height: 1.13;
  letter-spacing: -1.1px;
  color: var(--text);
  margin-bottom: 24px;
}

.article-page h2 {
  margin-top: 52px;
  margin-bottom: 18px;
  font-size: 1.72rem;
  line-height: 1.25;
  color: var(--text);
}

.article-page h3 {
  margin-top: 32px;
  margin-bottom: 12px;
  font-size: 1.25rem;
  color: #1e3a8a;
}

.article-page h4 {
  color: var(--text);
}

.article-page p {
  color: var(--text-soft);
  font-size: 1.06rem;
  line-height: 1.9;
  margin-bottom: 22px;
}

.article-page ul,
.article-page ol {
  margin: 20px 0 30px 28px;
  color: var(--text-soft);
  line-height: 1.9;
}

.article-page li {
  margin-bottom: 10px;
  color: var(--text-soft);
}

.article-tag {
  display: inline-block;
  margin-bottom: 16px;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--blue-dark);
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.article-hero-image {
  width: 100%;
  height: 375px;
  object-fit: cover;
  border-radius: 26px;
  margin: 30px 0 36px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.15);
}

.article-intro {
  font-size: 1.15rem;
  line-height: 1.9;
  color: #1e293b;
  background: linear-gradient(135deg, #eff6ff, #f8fafc);
  border-left: 6px solid var(--blue);
  padding: 22px 24px;
  border-radius: 20px;
  margin-bottom: 34px;
}

.article-page blockquote {
  margin: 24px 0;
  padding: 22px 24px;
  border-left: 6px solid var(--mint);
  background: #f0fdfa;
  color: #134e4a;
  border-radius: 18px;
  font-weight: 650;
}

/* =========================
   ARTÍCULOS RELACIONADOS
========================= */
.related-articles {
  margin-top: 62px;
  padding: 34px;
  background: linear-gradient(135deg, #eef6ff, #ffffff);
  border: 1px solid #dbeafe;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.related-articles h2 {
  margin-top: 0;
  margin-bottom: 22px;
  color: var(--text);
}

.related-links {
  display: grid;
  gap: 14px;
}

.related-links a {
  display: block;
  padding: 17px 19px;
  background: #ffffff;
  color: #0f172a;
  border-radius: 16px;
  font-weight: 800;
  border: 1px solid var(--border);
  transition: 0.2s ease;
}

.related-links a:hover {
  color: var(--blue-dark);
  border-color: #93c5fd;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* =========================
   BLOQUES DESTACADOS
========================= */
.featured-test {
  margin: 62px 0;
  padding: 44px;
  border-radius: var(--radius-xl);
  text-align: center;
  color: #ffffff;
  background:
    radial-gradient(circle at top left, rgba(20, 184, 166, 0.28), transparent 35%),
    radial-gradient(circle at bottom right, rgba(124, 58, 237, 0.22), transparent 35%),
    linear-gradient(135deg, #07111f, #1e3a8a);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 24px 55px rgba(15, 23, 42, 0.24);
}

.featured-test span {
  display: inline-block;
  margin-bottom: 14px;
  font-weight: 900;
  color: #5eead4;
}

.featured-test h2 {
  color: #ffffff;
  font-size: 2rem;
  margin-bottom: 16px;
}

.featured-test p {
  color: #dbeafe;
  max-width: 740px;
  margin: 0 auto 26px;
  line-height: 1.85;
}

/* =========================
   PROMPTS Y CÓDIGO
========================= */
.prompt-box,
.prompt-box-result,
.generated-prompt {
  background: #f8fafc !important;
  color: #111827 !important;
  border: 1px solid #dbeafe !important;
  border-radius: 18px;
  padding: 20px;
  line-height: 1.75;
  font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.04);
}

/* =========================
   FORMULARIOS Y HERRAMIENTAS
========================= */
form {
  display: grid;
  gap: 16px;
}

input,
textarea,
select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: #111827;
  font-family: inherit;
  font-size: 1rem;
}

input::placeholder,
textarea::placeholder {
  color: #64748b;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

/* FORZAR LEGIBILIDAD EN HERRAMIENTAS CON CSS INTERNO */
.article-page .tool-intro,
.article-page .correction-tool,
.article-page .use-cases,
.article-page .use-case-card,
.article-page .warning-box,
.article-page .prompt-output,
.article-page .result-card,
.article-page .quiz-question,
.article-page .quiz-box,
.article-page .tool-directory,
.article-page .prompt-generator,
.article-page .prompt-card {
  background-color: #ffffff !important;
  color: #0f172a !important;
  border-color: #dbeafe !important;
}

.article-page .tool-intro h1,
.article-page .tool-intro h2,
.article-page .tool-intro h3,
.article-page .correction-tool h1,
.article-page .correction-tool h2,
.article-page .correction-tool h3,
.article-page .use-cases h1,
.article-page .use-cases h2,
.article-page .use-cases h3,
.article-page .use-case-card h1,
.article-page .use-case-card h2,
.article-page .use-case-card h3,
.article-page .warning-box h1,
.article-page .warning-box h2,
.article-page .warning-box h3,
.article-page .prompt-output h1,
.article-page .prompt-output h2,
.article-page .prompt-output h3,
.article-page .result-card h1,
.article-page .result-card h2,
.article-page .result-card h3,
.article-page .quiz-question h1,
.article-page .quiz-question h2,
.article-page .quiz-question h3,
.article-page .tool-directory h1,
.article-page .tool-directory h2,
.article-page .tool-directory h3,
.article-page .prompt-generator h1,
.article-page .prompt-generator h2,
.article-page .prompt-generator h3,
.article-page .prompt-card h1,
.article-page .prompt-card h2,
.article-page .prompt-card h3 {
  color: #0f172a !important;
}

.article-page .tool-intro p,
.article-page .tool-intro li,
.article-page .correction-tool p,
.article-page .correction-tool li,
.article-page .use-cases p,
.article-page .use-cases li,
.article-page .use-case-card p,
.article-page .use-case-card li,
.article-page .warning-box p,
.article-page .warning-box li,
.article-page .prompt-output p,
.article-page .prompt-output li,
.article-page .result-card p,
.article-page .result-card li,
.article-page .quiz-question p,
.article-page .quiz-question li,
.article-page .tool-directory p,
.article-page .tool-directory li,
.article-page .prompt-generator p,
.article-page .prompt-generator li,
.article-page .prompt-card p,
.article-page .prompt-card li {
  color: #334155 !important;
}

/* Mantener los bloques oscuros realmente oscuros */
.article-page .result-highlight,
.article-page .result-main,
.article-page .featured-test {
  background:
    radial-gradient(circle at top left, rgba(20, 184, 166, 0.22), transparent 35%),
    linear-gradient(135deg, #07111f, #1e3a8a) !important;
  color: #ffffff !important;
  border-color: rgba(255, 255, 255, 0.16) !important;
}

.article-page .result-highlight h1,
.article-page .result-highlight h2,
.article-page .result-highlight h3,
.article-page .result-main h1,
.article-page .result-main h2,
.article-page .result-main h3,
.article-page .featured-test h1,
.article-page .featured-test h2,
.article-page .featured-test h3 {
  color: #ffffff !important;
}

.article-page .result-highlight p,
.article-page .result-highlight li,
.article-page .result-main p,
.article-page .result-main li,
.article-page .featured-test p,
.article-page .featured-test li {
  color: #dbeafe !important;
}

/* Quiz buttons */
.quiz-question button,
.quiz-options button {
  color: #0f172a !important;
  background: #f8fafc !important;
  border: 1px solid #cbd5e1 !important;
}

.quiz-question button:hover,
.quiz-options button:hover {
  color: #1d4ed8 !important;
  background: #eff6ff !important;
  border-color: #93c5fd !important;
}

.quiz-question button.selected,
.quiz-options button.selected {
  color: #ffffff !important;
  background: linear-gradient(135deg, var(--blue), var(--violet)) !important;
  border-color: transparent !important;
}

/* =========================
   TABLAS
========================= */
.article-page table {
  width: 100%;
  background: #ffffff;
  color: #111827;
  border-collapse: collapse;
  border-radius: 18px;
  overflow: hidden;
  margin: 30px 0;
}

.article-page th,
.article-page td {
  border: 1px solid #e5e7eb;
  padding: 14px;
  text-align: left;
  vertical-align: top;
}

.article-page th {
  background: #eff6ff;
  color: #0f172a;
}

.article-page td {
  color: #334155;
}

/* =========================
   FOOTER
========================= */
footer {
  padding: 44px 20px;
  text-align: center;
  background: #07111f;
  color: #cbd5e1;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
}

footer a {
  color: #e0f2fe;
  font-weight: 650;
}

footer a:hover {
  color: #5eead4;
}

/* =========================
   UTILIDADES
========================= */
.text-center {
  text-align: center;
}

.mt-2 {
  margin-top: 20px;
}

.mt-4 {
  margin-top: 40px;
}

.mb-2 {
  margin-bottom: 20px;
}

.mb-4 {
  margin-bottom: 40px;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }

  .nav-links {
    gap: 14px;
  }
}

@media (max-width: 760px) {
  .navbar {
    padding: 18px 0;
    flex-direction: column;
    gap: 14px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 62px 22px 56px;
    border-radius: 28px;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 22px;
  }

  .card-image {
    width: calc(100% + 44px);
    margin: -22px -22px 20px;
  }

  .article-page {
    padding: 30px 20px;
    border-radius: 26px;
    margin-top: 28px;
  }

  .article-page h1 {
    font-size: 2rem;
  }

  .article-hero-image {
    height: 240px;
    border-radius: 20px;
  }

  .featured-test {
    padding: 30px 22px;
  }
}