/* LinguaFlow — Apple-inspired language courses */

:root {
  --bg: #fbfbfd;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --border: rgba(0, 0, 0, 0.08);
  --accent: #5856d6;
  --accent-hover: #4f4dc4;
  --accent-soft: rgba(88, 86, 214, 0.1);
  --gradient-start: #667eea;
  --gradient-mid: #764ba2;
  --gradient-end: #f093fb;
  --success: #34c759;
  --error: #ff3b30;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 48px rgba(88, 86, 214, 0.12);
  --max-width: 1060px;
  --nav-height: 52px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
    "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.47059;
  letter-spacing: -0.022em;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

/* Navigation */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 22px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--text);
  font-weight: 500;
}

.nav-links .contact-btn {
  padding: 8px 18px;
  font-size: 0.875rem;
}

/* Layout */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 22px 80px;
}

main.landing-main {
  max-width: none;
  padding: 0 0 80px;
}

.landing-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 22px;
}

.section {
  padding: 72px 0;
}

.section-tight {
  padding: 48px 0;
}

/* Typography */

.hero {
  text-align: center;
  padding: 88px 0 64px;
}

.hero-modern {
  position: relative;
  text-align: center;
  padding: 100px 22px 80px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  inset: -40% -20% auto;
  height: 70%;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(102, 126, 234, 0.35), transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 20%, rgba(240, 147, 251, 0.2), transparent 60%),
    radial-gradient(ellipse 35% 35% at 15% 30%, rgba(118, 75, 162, 0.2), transparent 55%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2.75rem, 7vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.02;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

h2.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  margin-bottom: 12px;
}

.section-lead {
  text-align: center;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 48px;
  font-size: 1.0625rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 500;
  font-family: inherit;
  letter-spacing: -0.01em;
  border: none;
  border-radius: 980px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-secondary:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.btn-ghost {
  background: rgba(0, 0, 0, 0.04);
  color: var(--text);
}

.btn-ghost:hover {
  background: rgba(0, 0, 0, 0.08);
  color: var(--text);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.0625rem;
}

.btn-block {
  width: 100%;
}

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

/* Hero pills */

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 40px;
}

.hero-pill {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 980px;
  box-shadow: var(--shadow);
}

/* Bento grid */

.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

.bento-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

.bento-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.bento-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.bento-span-4 { grid-column: span 4; }
.bento-span-6 { grid-column: span 6; }
.bento-span-8 { grid-column: span 8; }
.bento-span-12 { grid-column: span 12; }

.bento-accent {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border: none;
}

.bento-accent h3,
.bento-accent p {
  color: rgba(255, 255, 255, 0.95);
}

.bento-accent p {
  opacity: 0.85;
}

.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: var(--accent-soft);
}

.bento-accent .bento-icon {
  background: rgba(255, 255, 255, 0.2);
}

@media (max-width: 900px) {
  .bento-span-4,
  .bento-span-6,
  .bento-span-8 {
    grid-column: span 12;
  }
}

/* Language chips */

.lang-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.lang-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.lang-chip:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.lang-flag {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.lang-flag.es { background: linear-gradient(180deg, #c60b1e 50%, #ffc400 50%); }
.lang-flag.fr { background: linear-gradient(90deg, #002395 33%, #fff 33%, #fff 66%, #ed2939 66%); }
.lang-flag.de { background: linear-gradient(180deg, #000 33%, #dd0000 33%, #dd0000 66%, #ffce00 66%); }
.lang-flag.ja { background: #fff; border: 1px solid var(--border); color: #bc002d; font-weight: 700; font-size: 0.75rem; }
.lang-flag.it { background: linear-gradient(90deg, #009246 33%, #fff 33%, #fff 66%, #ce2b37 66%); }
.lang-flag.pt { background: linear-gradient(180deg, #006600 40%, #ff0000 40%, #ff0000 60%, #ffcc00 60%); }

/* Stats */

.stats-band {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 48px 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 32px;
  text-align: center;
  box-shadow: var(--shadow);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Testimonials */

.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.testimonial-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 28px;
  box-shadow: var(--shadow);
}

.testimonial-quote {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 20px;
}

.testimonial-author {
  font-size: 0.875rem;
  font-weight: 600;
}

.testimonial-role {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* CTA */

.cta-band {
  text-align: center;
  background: linear-gradient(180deg, #f5f5f7 0%, var(--surface) 100%);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
  border: 1px solid var(--border);
}

.cta-band h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.cta-band p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
}

.trust-row {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 48px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.trust-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
}

/* Pricing */

.pricing-header {
  text-align: center;
  padding: 64px 0 40px;
}

.pricing-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 12px;
}

.pricing-header p {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  max-width: 520px;
  margin: 0 auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: box-shadow 0.25s, transform 0.25s;
}

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

.pricing-card.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.pricing-card.featured::before {
  content: "Most popular";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  background: var(--accent);
  padding: 4px 14px;
  border-radius: 980px;
}

.pricing-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 980px;
  margin-bottom: 16px;
  align-self: flex-start;
}

.pricing-card h3 {
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 24px;
}

.pricing-price {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 4px;
}

.pricing-price span {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-tertiary);
}

.pricing-period {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
}

.pricing-features li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
}

.pricing-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 600;
}

.pricing-card .btn {
  width: 100%;
  margin-top: auto;
}

/* Checkout */

.checkout-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  padding-top: 48px;
  align-items: start;
}

@media (max-width: 768px) {
  .checkout-layout {
    grid-template-columns: 1fr;
  }
}

.checkout-header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.checkout-header p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.form-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 32px;
  box-shadow: var(--shadow);
}

.form-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 20px;
}

.form-section-title--spaced {
  margin-top: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text);
}

.label-optional {
  color: var(--text-tertiary);
  font-weight: 400;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(88, 86, 214, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 500px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.order-summary {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 28px;
  box-shadow: var(--shadow);
  position: sticky;
  top: calc(var(--nav-height) + 24px);
}

.order-summary h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.summary-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.summary-line.total {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  padding-top: 16px;
  margin-top: 16px;
  border-top: 1px solid var(--border);
  margin-bottom: 0;
}

.summary-product {
  font-size: 0.9375rem;
  margin-bottom: 8px;
  color: var(--text);
}

.summary-note {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  line-height: 1.45;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* Footer */

.footer {
  border-top: 1px solid var(--border);
  padding: 32px 22px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.8125rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer a {
  color: var(--text-secondary);
}