/* ══ Landing Page Styles ══════════════════════════════════════════ */

:root {
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-out-strong: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);
}

/* Scroll animations */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 600ms var(--ease-out-strong), transform 600ms var(--ease-out-strong); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }

/* ── Section: Hero ─────────────────────────────────────── */
.landing-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 24px 40px; /* Top padding accounts for navbar */
  background: #ffffff;
}
.landing-hero-container {
  max-width: 1200px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 48px;
  justify-content: center;
}
.landing-hero-visual {
  flex: 1;
  min-width: 320px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.landing-hero-content {
  flex: 1;
  min-width: 320px;
  text-align: center;
}
.landing-hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: var(--fw-extra);
  color: var(--text-primary);
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}
.landing-hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 320px;
  margin: 0 auto;
}

/* ── Section: How it works ─────────────────────────────── */
.landing-section { padding: 80px 24px; }
.landing-section--gray { background: var(--bg-primary); }
.landing-section--white { background: #fff; }
.landing-section-header { text-align: center; max-width: 560px; margin: 0 auto 56px; }
.landing-section-header h2 { font-size: 2rem; font-weight: var(--fw-extra); letter-spacing: -0.5px; margin-bottom: 12px; }
.landing-section-header p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.6; }
.landing-section-header .landing-accent { color: var(--violet); }

.steps-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
  max-width: 960px; margin: 0 auto;
}
.step-card {
  text-align: center; padding: 40px 28px; border-radius: 20px;
  background: #fff; border: 1px solid var(--border);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.step-card:hover { transform: translateY(-6px); box-shadow: 0 12px 32px rgba(0,0,0,0.06); }
.step-number {
  width: 52px; height: 52px; border-radius: 16px; margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: var(--fw-extra); color: #fff;
}
.step-number--1 { background: linear-gradient(135deg, #8A5CFF, #6C2BFF); }
.step-number--2 { background: linear-gradient(135deg, #1A6BF4, #1A32F4); }
.step-number--3 { background: linear-gradient(135deg, #F06CD8, #F028D8); }
.step-card h3 { font-size: 1.15rem; font-weight: var(--fw-bold); margin-bottom: 8px; }
.step-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.55; }

/* ── Section: Features zig-zag ─────────────────────────── */
.feature-row {
  display: flex; align-items: center; gap: 64px;
  max-width: 1060px; margin: 0 auto 72px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row--reverse { flex-direction: row-reverse; }
.feature-text { flex: 1; }
.feature-visual { flex: 1; position: relative; }

.feature-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 100px; font-size: 0.78rem;
  font-weight: var(--fw-bold); text-transform: uppercase; letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.feature-badge--violet { background: var(--violet-light); color: var(--violet); }
.feature-badge--blue { background: var(--blue-light); color: var(--blue); }
.feature-badge--magenta { background: rgba(240,40,216,0.1); color: var(--magenta); }

.feature-text h3 { font-size: 1.6rem; font-weight: var(--fw-extra); letter-spacing: -0.3px; margin-bottom: 12px; line-height: 1.2; }
.feature-text p { color: var(--text-secondary); font-size: 1.02rem; line-height: 1.65; }

.feature-mockup {
  width: 100%; border-radius: 16px; overflow: hidden;
  background: var(--bg-secondary); border: 1px solid var(--border);
  box-shadow: 0 20px 50px -12px rgba(0,0,0,0.1);
  aspect-ratio: 16/10; display: flex; align-items: center; justify-content: center;
  position: relative;
}
#stats-mockup {
  aspect-ratio: unset; overflow: visible;
}
.feature-mockup img { width: 100%; height: 100%; object-fit: cover; }

/* ── Section: Capabilities grid ────────────────────────── */
.caps-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px; max-width: 960px; margin: 0 auto;
}
.cap-card {
  padding: 28px 24px; background: #fff; border-radius: 16px;
  border: 1px solid var(--border); transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.cap-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.05); }
.cap-icon {
  width: 44px; height: 44px; border-radius: 12px; display: flex;
  align-items: center; justify-content: center; margin-bottom: 16px;
  color: #fff; font-size: 22px;
}
.cap-card h4 { font-size: 1rem; font-weight: var(--fw-bold); margin-bottom: 6px; }
.cap-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.5; }

/* ── Section: Plans preview ────────────────────────────── */
.plans-preview {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  max-width: 700px; margin: 0 auto;
}
.plan-preview-card {
  padding: 32px; border-radius: 20px; border: 2px solid var(--border);
  background: #fff; text-align: center;
}
.plan-preview-card--premium { border-color: var(--violet); box-shadow: 0 12px 40px rgba(108,43,255,0.12); position: relative; }
.plan-preview-card h3 { font-size: 1.15rem; font-weight: var(--fw-bold); margin-bottom: 4px; }
.plan-preview-price { font-size: 2.2rem; font-weight: var(--fw-extra); color: var(--violet); margin-bottom: 16px; }
.plan-preview-price small { font-size: 0.85rem; color: var(--text-secondary); font-weight: var(--fw-medium); }
.plan-preview-list { list-style: none; padding: 0; margin: 0 0 24px; text-align: left; }
.plan-preview-list li {
  display: flex; align-items: center; gap: 8px; padding: 8px 0;
  font-size: 0.9rem; border-bottom: 1px solid var(--border);
}
.plan-preview-list li:last-child { border-bottom: none; }
.plan-preview-list li .material-symbols-outlined { font-size: 18px; color: var(--green); }
.plan-preview-list li.disabled { color: var(--text-secondary); }
.plan-preview-list li.disabled .material-symbols-outlined { color: var(--text-secondary); }
.plan-popular-tag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--violet); color: #fff; font-size: 0.72rem; font-weight: var(--fw-bold);
  padding: 4px 16px; border-radius: 100px; text-transform: uppercase; letter-spacing: 0.5px;
}

/* ── Section: FAQ ──────────────────────────────────────── */
.landing-faq { max-width: 680px; margin: 0 auto; }
.landing-faq-item {
  border: 1px solid var(--border); border-radius: 14px;
  margin-bottom: 12px; background: #fff; overflow: hidden;
}
.landing-faq-item summary {
  padding: 18px 24px; font-size: 1rem; font-weight: var(--fw-semi);
  cursor: pointer; list-style: none; display: flex; align-items: center;
  justify-content: space-between;
}
.landing-faq-item summary::after { content: '+'; font-size: 1.3rem; color: var(--text-secondary); transition: transform 0.2s; }
.landing-faq-item[open] summary::after { content: '−'; }
.landing-faq-item p { padding: 0 24px 18px; margin: 0; color: var(--text-secondary); line-height: 1.6; font-size: 0.92rem; }

/* ── Section: Final CTA ───────────────────────────────── */
.landing-cta-section {
  max-width: 800px; margin: 0 auto;
  background: linear-gradient(135deg, var(--violet-dark) 0%, var(--violet) 100%);
  border-radius: 24px; padding: 64px 40px; text-align: center;
  color: #fff; position: relative; overflow: hidden;
  box-shadow: 0 20px 60px rgba(108,43,255,0.3);
}
.landing-cta-section h2 { font-size: 2.2rem; font-weight: var(--fw-extra); margin-bottom: 12px; position: relative; z-index: 1; color: #fff; }
.landing-cta-section p { font-size: 1.05rem; opacity: 0.9; margin-bottom: 28px; max-width: 480px; margin-left: auto; margin-right: auto; position: relative; z-index: 1; color: rgba(255,255,255,0.9); }
.landing-cta-btn {
  display: inline-block; background: #fff; color: var(--violet); font-weight: var(--fw-bold);
  padding: 16px 48px; border-radius: 100px; text-decoration: none;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15); transition: transform 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
  position: relative; z-index: 1; font-size: 1rem;
}
.landing-cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); }
.landing-cta-btn:active {
  transform: scale(0.97);
  box-shadow: 0 4px 15px rgba(255,255,255,0.2);
}

/* Typewriter cursor */
.tw-cursor {
  font-weight: var(--fw-extra);
  color: var(--violet);
  margin-left: 2px;
}
.tw-cursor.blinking {
  animation: tw-blink 1s step-start infinite;
}
@keyframes tw-blink {
  50% { opacity: 0; }
}
.landing-cta-orb {
  position: absolute; border-radius: 50%; border: 2px solid rgba(255,255,255,0.08);
}
.landing-cta-orb--1 { width: 350px; height: 350px; top: -40%; right: -12%; }
.landing-cta-orb--2 { width: 260px; height: 260px; bottom: -35%; left: -8%; }

/* ── Interactive Quiz Carousel ─────────────────────────── */
.quiz-carousel {
  width: 100%; border-radius: 16px; overflow: hidden;
  background: linear-gradient(135deg, #f0f4ff 0%, #e1e8ff 100%);
  border: 1px solid var(--border);
  box-shadow: 0 20px 50px -12px rgba(0,0,0,0.1);
  position: relative; min-height: 420px;
  transition: min-height 0.4s ease;
}
.quiz-slide {
  position: absolute; top: 0; left: 0; width: 100%; padding: 24px;
  display: flex; flex-direction: column; gap: 12px;
  opacity: 0; transform: translateX(60px);
  transition: opacity 300ms var(--ease-in-out), transform 300ms var(--ease-in-out);
  pointer-events: none;
}
.quiz-slide.active {
  opacity: 1; transform: translateX(0); pointer-events: auto;
  position: relative;
}
.quiz-slide.exit-left {
  opacity: 0; transform: translateX(-60px); pointer-events: none;
}
.quiz-header {
  display: flex; justify-content: space-between; align-items: center; width: 100%;
}
.quiz-area-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: 100px; font-size: 0.72rem;
  font-weight: 700; letter-spacing: 0.3px;
}
.quiz-area-pill--lc   { background: rgba(26,107,244,0.1); color: var(--blue); }
.quiz-area-pill--mat  { background: rgba(108,43,255,0.1); color: var(--violet); }
.quiz-area-pill--cn   { background: rgba(16,185,129,0.1); color: var(--green); }
.quiz-area-pill--sc   { background: rgba(245,158,11,0.1); color: #D97706; }
.quiz-q-number {
  font-size: 0.72rem; color: var(--text-secondary); font-weight: 600;
  display: flex; align-items: center; gap: 4px;
}
.quiz-card {
  background: #fff; border-radius: 14px; padding: 20px;
  border: 1px solid var(--border); width: 100%; text-align: left;
}
.quiz-stem {
  font-size: 0.88rem; line-height: 1.6; margin-bottom: 16px; color: var(--text-primary);
}
.quiz-stem .quiz-formula {
  display: block; text-align: center; padding: 10px; margin: 10px 0;
  background: var(--bg-primary); border-radius: 8px; font-size: 1rem;
  font-weight: 600; font-family: 'KaTeX_Math', 'Times New Roman', serif;
  letter-spacing: 0.5px;
}
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-option {
  padding: 11px 14px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 0.82rem; display: flex; align-items: center; gap: 10px;
  cursor: pointer; transition: transform 150ms var(--ease-out), border-color 150ms ease, background 150ms ease; background: #fff;
  user-select: none;
}
.quiz-option:hover:not(.disabled) {
  border-color: var(--violet); background: rgba(108,43,255,0.03);
  transform: translateX(4px);
}
.quiz-option:active:not(.disabled) {
  transform: scale(0.98) translateX(4px);
}
.quiz-option.disabled { cursor: default; }
.quiz-option-badge {
  width: 26px; height: 26px; border-radius: 50%; border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem; font-weight: 700; flex-shrink: 0;
  transition: all 0.3s ease;
}
.quiz-option.correct {
  border-color: var(--green); background: rgba(16,185,129,0.06);
  animation: quiz-pulse-correct 0.4s ease;
}
.quiz-option.correct .quiz-option-badge {
  background: var(--green); color: #fff; border-color: var(--green);
}
.quiz-option.wrong {
  border-color: #f87171; background: rgba(248,113,113,0.06);
  animation: quiz-shake 0.4s ease;
}
.quiz-option.wrong .quiz-option-badge {
  background: #f87171; color: #fff; border-color: #f87171;
}
.quiz-option.reveal-correct {
  border-color: var(--green); background: rgba(16,185,129,0.04);
}
.quiz-option.reveal-correct .quiz-option-badge {
  border-color: var(--green); color: var(--green);
}
@keyframes quiz-pulse-correct {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}
@keyframes quiz-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.quiz-feedback {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  border-radius: 10px; font-size: 0.8rem; font-weight: 600;
  margin-top: 12px; opacity: 0; transform: translateY(-8px);
  transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out);
}
.quiz-feedback.show { opacity: 1; transform: translateY(0); }
.quiz-feedback.correct {
  background: rgba(16,185,129,0.08); color: #059669; border: 1px solid rgba(16,185,129,0.2);
}
.quiz-feedback.wrong {
  background: rgba(248,113,113,0.08); color: #dc2626; border: 1px solid rgba(248,113,113,0.2);
}
.quiz-explanation {
  margin-top: 12px; padding: 0 16px; border-radius: 10px;
  background: rgba(108,43,255,0.04); border: 1px solid rgba(108,43,255,0.12);
  max-height: 0; overflow: hidden; opacity: 0;
  transition: max-height 400ms var(--ease-drawer), opacity 300ms var(--ease-out), padding 300ms var(--ease-out);
}
.quiz-explanation.show {
  max-height: 200px; opacity: 1; padding: 14px 16px;
}
.quiz-explanation-label {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.7rem; font-weight: 700; color: var(--violet);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px;
}
.quiz-explanation p {
  font-size: 0.82rem; color: var(--text-secondary); line-height: 1.55; margin: 0;
}
.quiz-next-btn {
  margin-top: 14px; display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 22px; border: none; border-radius: 10px;
  background: var(--violet); color: #fff; font-size: 0.82rem;
  font-weight: 700; cursor: pointer; transition: all 0.2s ease;
  opacity: 0; transform: translateY(8px);
}
.quiz-next-btn.show { opacity: 1; transform: translateY(0); }
.quiz-next-btn:hover { background: var(--violet-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(108,43,255,0.25); }
.quiz-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border); cursor: pointer;
  transition: all 0.3s ease;
}
.quiz-dot.active { background: var(--violet); transform: scale(1.25); }
.quiz-dot.done { background: var(--green); }
.quiz-slide--result {
  min-height: inherit;
  justify-content: center;
}
.quiz-result {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; text-align: center; height: 100%; flex: 1;
}
.quiz-result-score {
  font-size: 3.5rem; font-weight: 900; letter-spacing: -2px;
  background: linear-gradient(135deg, var(--violet), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.quiz-result h3 { font-size: 1.2rem; font-weight: 800; margin: 0; }
.quiz-result p { font-size: 0.9rem; color: var(--text-secondary); max-width: 300px; margin: 0; line-height: 1.5; }
.quiz-result-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border: none; border-radius: 100px;
  background: var(--violet); color: #fff; font-weight: 700;
  font-size: 0.92rem; cursor: pointer; text-decoration: none;
  transition: all 0.2s ease; box-shadow: 0 8px 24px rgba(108,43,255,0.2);
}
.quiz-result-cta:hover { background: var(--violet-dark); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(108,43,255,0.3); }
.quiz-result-retry {
  background: none; border: 1.5px solid var(--border); color: var(--text-secondary);
  padding: 10px 24px; border-radius: 100px; font-size: 0.82rem; font-weight: 600;
  cursor: pointer; transition: all 0.2s ease; margin-top: 4px;
}
.quiz-result-retry:hover { border-color: var(--violet); color: var(--violet); }

/* ── Dynamic Stats ("Tu Rendimiento") ──────────────────── */
.stats-live-banner {
  display: none; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 100px;
  background: linear-gradient(135deg, var(--violet), var(--magenta));
  color: #fff; font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
  animation: stats-banner-pulse 2s ease infinite;
  align-self: flex-start;
}
.stats-live-banner.show { display: inline-flex; }
@keyframes stats-banner-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
.stats-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 100px;
  background: rgba(108,43,255,0.08); color: var(--violet);
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.03em;
  transition: all 0.4s ease;
}
.stats-badge.live {
  background: rgba(16,185,129,0.1); color: var(--green);
}
.stat-area-result {
  font-weight: 700; font-size: 0.75rem; color: var(--text-secondary);
  display: inline-flex; align-items: center; gap: 4px;
  transition: all 0.3s ease;
}
.stat-area-result.correct { color: var(--green); }
.stat-area-result.wrong { color: #f87171; }
.stat-area-row {
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}
.stat-area-row.highlight-correct {
  border-color: rgba(16,185,129,0.3) !important;
  box-shadow: 0 0 0 3px rgba(16,185,129,0.08);
}
.stat-area-row.highlight-wrong {
  border-color: rgba(248,113,113,0.3) !important;
  box-shadow: 0 0 0 3px rgba(248,113,113,0.08);
}
#stats-mockup.quiz-done {
  animation: stats-glow 0.6s ease;
}
@keyframes stats-glow {
  0% { box-shadow: 0 0 0 0 rgba(108,43,255,0.2); }
  50% { box-shadow: 0 0 30px 8px rgba(108,43,255,0.15); }
  100% { box-shadow: none; }
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Hero Section */
  .landing-hero {
    padding-top: 100px;
    padding-bottom: 60px;
    min-height: auto;
  }
  .landing-hero-container {
    flex-direction: column-reverse; /* Visual on bottom, text on top */
    gap: 32px;
  }
  .landing-hero-visual, .landing-hero-content {
    min-width: 100%;
  }
  .landing-hero-title {
    font-size: 2.2rem;
    margin-bottom: 20px;
  }
  
  /* Sections */
  .landing-section { padding: 60px 20px; }
  .landing-section-header { margin-bottom: 40px; }
  .landing-section-header h2 { font-size: 1.8rem; }
  .steps-grid { grid-template-columns: 1fr; max-width: 400px; gap: 24px; }
  
  /* Features */
  .feature-row, .feature-row--reverse { flex-direction: column; gap: 32px; margin-bottom: 56px; }
  .feature-text h3 { font-size: 1.5rem; }
  .feature-mockup { aspect-ratio: auto; min-height: 250px; }
  
  /* Quiz Carousel Demo */
  .quiz-carousel { min-height: auto; border-radius: 12px; }
  .quiz-slide { padding: 20px; }
  .quiz-carousel { padding-bottom: 20px; }
  .quiz-stem { font-size: 0.85rem; }
  .quiz-option { padding: 10px 12px; }
  
  /* Grid & Plans */
  .caps-grid { grid-template-columns: 1fr; max-width: 400px; gap: 16px; }
  .plans-preview { grid-template-columns: 1fr; max-width: 400px; }
  .plan-preview-card { padding: 24px; }
  
  /* Stats Mockup */
  .stat-counter { font-size: 1.6rem !important; }
  .stat-area-row { padding: 10px 12px !important; }
  
  /* CTA */
  .landing-cta-section { padding: 48px 20px; margin: 0 16px; border-radius: 20px; }
  .landing-cta-section h2 { font-size: 1.8rem; }
  
  /* Footer */
  .landing-footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  
  /* Mobile general */
  body { font-size: 15px; }
}

@media (max-width: 480px) {
  .landing-hero-title {
    font-size: 2rem;
  }
  .quiz-carousel {
    border-radius: 0;
    border-left: none;
    border-right: none;
    margin-left: -20px;
    margin-right: -20px;
    width: calc(100% + 40px);
  }
  .feature-mockup {
    border-radius: 12px;
  }
}