/* ═══════════════════════════════════════════════════════
   DESAF-IA — Playbook Web
   styles.css
═══════════════════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  --bg:          #020c1f;
  --bg-alt:      #030f25;
  --card-bg:     rgba(8, 12, 35, 0.55);
  --card-border: rgba(42, 45, 100, 0.35);
  --purple:      #7c3aed;
  --purple-lt:   #a78bfa;
  --cyan:        #00ccff;
  --cyan-dim:    rgba(0, 204, 255, 0.12);
  --text:        #f2f2ff;
  --text-muted:  #9aa8cc;
  --text-dim:    #c0caf0;
  --green:       #4ade80;
  --font:        'Inter', sans-serif;
  --mono:        'JetBrains Mono', monospace;
  --nav-h:       64px;
  --radius:      16px;
  --radius-sm:   10px;
  --glow-purple: 0 0 32px rgba(124, 58, 237, 0.25);
  --glow-cyan:   0 0 20px rgba(0, 204, 255, 0.2);
  --transition:  0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: rgba(0, 204, 255, 0.1);
  border: 1px solid rgba(0, 204, 255, 0.2);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--cyan);
}

/* ── Matrix Canvas ── */
#matrix-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.8;
}

body > * { position: relative; z-index: 1; }

/* ── Scroll Progress ── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ═══════════════════════ NAVBAR ═══════════════════════ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 900;
  backdrop-filter: blur(14px);
  background: rgba(2, 8, 25, 0.7);
  border-bottom: 1px solid rgba(42, 45, 100, 0.2);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(2, 8, 25, 0.92);
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -0.3px;
  color: var(--text);
  flex-shrink: 0;
}

.nav-logo img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2px;
  margin-left: auto;
  align-items: center;
}

.nav-links > li { position: relative; }

.nav-links a {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  padding: 6px 11px;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--purple-lt);
  background: rgba(124, 58, 237, 0.12);
}

/* ── Dropdown ── */
.nav-dropdown > a::after {
  content: '▾';
  font-size: 10px;
  opacity: 0.6;
  margin-left: 2px;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: rgba(3, 8, 25, 0.98);
  border: 1px solid rgba(42, 45, 100, 0.4);
  border-radius: 12px;
  min-width: 210px;
  padding: 6px;
  padding-top: 12px;
  z-index: 999;
  backdrop-filter: blur(20px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}

.nav-dropdown.open .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-menu a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  transition: background var(--transition), color var(--transition);
  border: none;
  background: none;
}

.nav-dropdown-menu a:hover {
  background: rgba(124, 58, 237, 0.14);
  color: var(--purple-lt);
}

.nav-dropdown-menu .menu-label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(124, 58, 237, 0.5);
  padding: 6px 12px 4px;
}

.nav-dropdown-menu hr {
  border: none;
  border-top: 1px solid rgba(42, 45, 100, 0.3);
  margin: 4px 0;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.25s;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ═══════════════════════ HERO ═══════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  padding: calc(var(--nav-h) + 60px) 40px 80px;
  max-width: 1100px;
  margin: 0 auto;
}

.hero-content {
  flex: 1;
  max-width: 560px;
}

.badge {
  display: inline-block;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.4);
  color: var(--purple-lt);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.highlight { color: var(--purple-lt); }

.hero-sub {
  font-size: clamp(17px, 2.5vw, 20px);
  color: var(--text-dim);
  margin-bottom: 36px;
  line-height: 1.5;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 48px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 28px;
  background: linear-gradient(135deg, var(--purple), #9d5cf5);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.2px;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(124, 58, 237, 0.45);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 15px 28px;
  background: transparent;
  color: var(--purple-lt);
  font-size: 16px;
  font-weight: 700;
  border: 1px solid rgba(124, 58, 237, 0.4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-secondary:hover {
  background: rgba(124, 58, 237, 0.1);
  border-color: rgba(124, 58, 237, 0.7);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--card-border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--purple-lt);
  line-height: 1;
}

.stat-lbl {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 600;
}

.stat-div {
  width: 1px;
  height: 36px;
  background: var(--card-border);
}

/* Hero Image */
.hero-img {
  flex: 0 0 420px;
  max-width: 420px;
}

.hero-img-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
}

.hero-img-frame img {
  width: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--radius);
}

.hero-img-glow {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  box-shadow: inset 0 0 60px rgba(124, 58, 237, 0.2);
  pointer-events: none;
}

/* ═══════════════════════ SECTIONS ═══════════════════════ */
.section {
  padding: 100px 24px;
}

.alt-section {
  background: rgba(3, 10, 28, 0.5);
  border-top: 1px solid rgba(42, 45, 100, 0.2);
  border-bottom: 1px solid rgba(42, 45, 100, 0.2);
}

.section-inner {
  max-width: 1060px;
  margin: 0 auto;
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--purple-lt);
  margin-bottom: 12px;
}

.section h2 {
  font-size: clamp(26px, 4.5vw, 44px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.section-sub {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 680px;
  margin-bottom: 56px;
  line-height: 1.7;
}

/* ─── Welcome Text ─── */
.welcome-block {
  max-width: 760px;
  margin-bottom: 0;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 36px 40px;
  backdrop-filter: blur(6px);
}

.welcome-lead {
  font-size: 18px;
  color: var(--text);
  margin-bottom: 20px;
}

.welcome-block p {
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 16px;
}

.welcome-block p:last-child { margin-bottom: 0; }

.welcome-block strong { color: var(--text); }

/* ─── Cards Grid ─── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: rgba(124, 58, 237, 0.45);
  transform: translateY(-4px);
  box-shadow: var(--glow-purple);
}

.card-icon {
  font-size: 36px;
  margin-bottom: 16px;
  display: block;
}

.card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ─── Tools Grid ─── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

/* ─── 3D Tool Cards ─── */
.tool-scene {
  perspective: 1200px;
  cursor: pointer;
  height: 440px;   /* altura fija: ambas caras son position:absolute */
}

.tool-card {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  text-align: center;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(.2, .8, .2, 1);
}

.tool-scene:hover .tool-card,
.tool-scene.flipped .tool-card {
  transform: rotateY(180deg);
  -webkit-transform: rotateY(180deg);
}

/* Ambas caras: absolutas, misma posición, ocultan su reverso */
.card-face {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px 28px 28px;
}

.card-front {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
}

.tool-card.featured .card-front {
  border-color: rgba(124, 58, 237, 0.5);
  background: rgba(12, 8, 40, 0.7);
  box-shadow: 0 0 40px rgba(124, 58, 237, 0.15);
}

.card-back {
  transform: rotateY(180deg);
  -webkit-transform: rotateY(180deg);
  background: linear-gradient(135deg, #3b1a8f, var(--purple));
  border: 1px solid rgba(124, 58, 237, 0.6);
  gap: 14px;
}

.back-check {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-back h3 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin: 0;
}

.card-back p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.6;
  margin: 0;
}

.btn-back-cta {
  display: inline-block;
  margin-top: 4px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn-back-cta:hover {
  background: rgba(255, 255, 255, 0.28);
  border-color: rgba(255, 255, 255, 0.55);
}

.featured-ribbon {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--purple), #9d5cf5);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 4px 16px;
  border-radius: 0 0 10px 10px;
  white-space: nowrap;
}

.tool-logo {
  width: 60px;
  height: 60px;
  object-fit: contain;
  margin: 0 auto 20px;
  display: block;
}

.tool-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
}

.tool-strength {
  font-size: 14px;
  color: var(--text);
  line-height: 1.65;
  margin-bottom: 16px;
}

.tool-badge {
  display: inline-block;
  background: rgba(0, 204, 255, 0.1);
  border: 1px solid rgba(0, 204, 255, 0.25);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.tool-for {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}

.install-guide-link {
  display: inline-block;
  margin-top: 18px;
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
  border: 1px solid rgba(0, 204, 255, 0.3);
  background: rgba(0, 204, 255, 0.07);
  padding: 7px 14px;
  border-radius: 8px;
  transition: background var(--transition), border-color var(--transition);
  text-decoration: none;
}
.install-guide-link:hover {
  background: rgba(0, 204, 255, 0.16);
  border-color: rgba(0, 204, 255, 0.5);
}

.nav-link-highlight {
  color: var(--cyan) !important;
  border: 1px solid rgba(0, 204, 255, 0.3);
  border-radius: 8px;
}
.nav-link-highlight:hover {
  background: rgba(0, 204, 255, 0.1) !important;
  color: var(--cyan) !important;
}

/* ─── Tip Box ─── */
.tip-box {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: rgba(0, 204, 255, 0.05);
  border: 1px solid rgba(0, 204, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-dim);
}

.tip-icon { font-size: 22px; flex-shrink: 0; margin-top: 2px; }

.tip-box strong { color: var(--cyan); }

/* ─── Instructions Box ─── */
.instructions-box {
  background: rgba(124, 58, 237, 0.07);
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 32px;
}

.instructions-box h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--purple-lt);
  margin-bottom: 16px;
}

.instructions-box ol {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.instructions-box li {
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}

.instructions-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-muted);
  font-style: italic;
}

/* ═══════════════════════ PROMPT BLOCKS ═══════════════════════ */
.prompt-block {
  background: rgba(4, 8, 24, 0.85);
  border: 1px solid rgba(0, 204, 255, 0.15);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(4px);
}

.prompt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(0, 204, 255, 0.1);
  background: rgba(0, 204, 255, 0.04);
  flex-wrap: wrap;
}

.prompt-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: rgba(0, 204, 255, 0.6);
  letter-spacing: 0.3px;
}

.prompt-block pre {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(230, 240, 255, 0.95);
  padding: 24px;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.big-prompt pre {
  font-size: 13.5px;
  padding: 28px 30px;
  color: rgba(235, 242, 255, 0.98);
}

/* ─── Copy Button ─── */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  background: rgba(124, 58, 237, 0.2);
  border: 1px solid rgba(124, 58, 237, 0.4);
  border-radius: 8px;
  color: var(--purple-lt);
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: rgba(124, 58, 237, 0.35);
  border-color: rgba(124, 58, 237, 0.65);
  transform: translateY(-1px);
}

.copy-btn.copied {
  background: rgba(74, 222, 128, 0.15);
  border-color: rgba(74, 222, 128, 0.4);
  color: var(--green);
}

.copy-btn svg { flex-shrink: 0; }

/* ─── Prompts Grid (10 prompts) ─── */
.prompts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.prompt-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(6px);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.prompt-card:hover {
  border-color: rgba(124, 58, 237, 0.35);
  box-shadow: 0 4px 24px rgba(124, 58, 237, 0.1);
}

.prompt-card > .prompt-block {
  border-radius: 0;
  border: none;
  border-top: 1px solid rgba(0, 204, 255, 0.1);
  background: transparent;
}

.prompt-card > .prompt-block pre {
  font-size: 12.5px;
  padding: 20px 22px;
  color: rgba(230, 238, 255, 0.95);
}

.prompt-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px 14px;
}

.prompt-num {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 900;
  color: rgba(124, 58, 237, 0.35);
  line-height: 1;
  flex-shrink: 0;
  letter-spacing: -1px;
}

.prompt-card-header h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}

/* ─── Bonus Section ─── */
.bonus-section {
  background: rgba(12, 8, 40, 0.7);
  border: 1px solid rgba(124, 58, 237, 0.4);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 0 40px rgba(124, 58, 237, 0.1);
}

.bonus-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 28px 20px;
}

.bonus-icon { font-size: 40px; flex-shrink: 0; }

.bonus-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--purple-lt);
  margin-bottom: 4px;
}

.bonus-header h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
}

.bonus-section .prompt-block {
  border-radius: 0;
  border: none;
  border-top: 1px solid rgba(124, 58, 237, 0.2);
}

.bonus-section pre {
  font-size: 13.5px !important;
  padding: 24px 28px !important;
  color: rgba(235, 242, 255, 0.98) !important;
}

/* ═══════════════════════ TABLA DESAFÍOS ═══════════════════════ */
.tabla-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
}

.tabla-desafios {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  backdrop-filter: blur(8px);
}

.tabla-desafios thead {
  background: rgba(124, 58, 237, 0.12);
}

.tabla-desafios th {
  padding: 16px 20px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--purple-lt);
  border-bottom: 1px solid rgba(124, 58, 237, 0.25);
  white-space: nowrap;
}

.tabla-desafios td {
  padding: 20px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.65;
  border-bottom: 1px solid var(--card-border);
  vertical-align: top;
}

.tabla-desafios tbody tr:last-child td { border-bottom: none; }

.tabla-desafios tbody tr:hover td {
  background: rgba(124, 58, 237, 0.05);
}

.tabla-desafios td strong { color: var(--text); }

/* ═══════════════════════ CIERRE ═══════════════════════ */
.cierre-section {
  text-align: center;
}

.cierre-section h2 { margin-bottom: 32px; }

.cierre-text {
  max-width: 680px;
  margin: 0 auto;
  font-size: 16px;
  color: var(--text-dim);
  line-height: 1.8;
  text-align: center;
}

.cierre-text strong { color: var(--text); }

.pasos-cierre {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin: 56px 0 40px;
}

.paso-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  max-width: 300px;
  text-align: left;
  backdrop-filter: blur(6px);
  transition: border-color var(--transition), transform var(--transition);
}

.paso-item:hover {
  border-color: rgba(124, 58, 237, 0.4);
  transform: translateY(-3px);
}

.paso-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--purple), #9d5cf5);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 900;
  color: #fff;
}

.paso-item p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
  margin-top: 8px;
}

.cierre-final {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 40px;
  font-style: italic;
}

.cta-final {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* ═══════════════════════ FOOTER ═══════════════════════ */
.footer {
  text-align: center;
  padding: 60px 20px 40px;
  border-top: 1px solid rgba(30, 30, 60, 0.6);
}

.footer-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  margin: 0 auto 12px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--purple-lt);
  margin-bottom: 8px;
}

.footer p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-copy {
  margin-top: 16px;
  font-size: 12px;
  color: rgba(80, 90, 130, 0.6);
}

/* ═══════════════════════ BACK TO TOP ═══════════════════════ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: rgba(124, 58, 237, 0.2);
  border: 1px solid rgba(124, 58, 237, 0.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--purple-lt);
  cursor: pointer;
  z-index: 800;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: rgba(124, 58, 237, 0.4);
}

/* ═══════════════════════ SCROLL REVEAL ═══════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════ RESPONSIVE ═══════════════════════ */
@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    gap: 40px;
    text-align: center;
    padding-top: calc(var(--nav-h) + 40px);
  }

  .hero-img {
    flex: 0 0 auto;
    max-width: 320px;
    width: 100%;
  }

  .hero-cta { justify-content: center; }
  .hero-stats { justify-content: center; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 2px;
    padding: 12px 16px 20px;
    background: rgba(2, 8, 25, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
  }

  .nav-links.open { display: flex; }
  .nav-links > li { position: static; width: 100%; }
  .nav-links a { display: block; padding: 10px 14px; font-size: 14px; }
  .nav-links a::after { display: none !important; }
  .hamburger { display: flex; }

  /* Mobile: dropdowns always visible as flat list */
  .nav-dropdown-menu {
    display: block !important;
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0 0 0 12px;
    min-width: unset;
    backdrop-filter: none;
  }
  .nav-dropdown-menu a { font-size: 13px; padding: 8px 12px; color: var(--text-muted); }
  .nav-dropdown-menu .menu-label { padding: 8px 12px 2px; }
  .nav-dropdown-menu hr { margin: 2px 0; }
}

@media (max-width: 680px) {
  .section { padding: 70px 16px; }

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

  .welcome-block { padding: 24px 20px; }
  .instructions-box { padding: 22px 20px; }
  .bonus-header { padding: 20px 20px 16px; }
  .prompt-block pre { padding: 18px !important; font-size: 12px !important; }
  .big-prompt pre { padding: 18px 20px !important; }

  .pasos-cierre { flex-direction: column; align-items: center; }
  .paso-item { max-width: 100%; }

  .tabla-desafios th,
  .tabla-desafios td { padding: 14px 16px; font-size: 13px; }

  .hero h1 { font-size: 36px; }
  .section h2 { font-size: 28px; }
}

@media (max-width: 400px) {
  .hero h1 { font-size: 30px; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
}