/* === LANDING PAGE CSS === */

/* NAV */
.landing-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-chevron-blue {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--blue);
  line-height: 1;
  font-family: var(--font-mono);
}

.logo-circle-orange {
  width: 10px;
  height: 10px;
  border: 2px solid var(--orange);
  border-radius: 50%;
  margin: 0 3px;
  flex-shrink: 0;
}

.logo-wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-left: auto;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--text); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 1rem 2rem;
  gap: 0.75rem;
  border-top: 1px solid var(--border);
}

.nav-mobile.open { display: flex; }
.nav-mobile a { color: var(--text-muted); font-size: 0.9375rem; text-decoration: none; }
.nav-mobile a:hover { color: var(--text); }

/* HERO */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 4rem 0;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

.hero-kicker {
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 750px;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-num {
  font-size: 1.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--orange);
  line-height: 1;
}

.hero-stat-label {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.hero-bg-element {
  position: absolute;
  top: -100px;
  right: -200px;
  width: 700px;
  height: 700px;
  border: 1px solid var(--border);
  border-radius: 50%;
  opacity: 0.3;
  pointer-events: none;
}

.hero-bg-element::before {
  content: '';
  position: absolute;
  top: 80px;
  left: 80px;
  right: 80px;
  bottom: 80px;
  border: 1px solid var(--border);
  border-radius: 50%;
}

/* CONTAINER */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* SECTIONS */
.process-section, .programs-section, .testimonials-section {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.section-tag-wrap {
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
  max-width: 600px;
}

/* PROCESS STEPS */
.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 1rem;
}

.process-step {
  flex: 1;
  min-width: 180px;
}

.process-connector {
  color: var(--text-faint);
  font-size: 1.25rem;
  padding: 0 0.5rem;
  margin-top: 1.25rem;
  flex-shrink: 0;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 0.75rem;
  opacity: 0.6;
}

.step-content h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.step-content p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* MATH SECTION */
.math-section {
  padding: 5rem 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.math-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.math-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0.75rem 0 1rem;
}

.math-grid {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  grid-template-rows: auto auto;
  gap: 1.5rem 0;
}

.math-item {
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.math-item:first-child { padding-left: 0; }

.math-divider { background: var(--border); }

.math-label {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.math-value {
  font-size: 1.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text);
  line-height: 1.1;
}

.math-per {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
}

.math-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* PROGRAMS */
.programs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.program-card {
  background: var(--black);
  padding: 1.5rem;
  transition: background var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.program-card:hover { background: var(--surface); }

.program-num {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}

.program-name {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.3;
}

.program-desc {
  flex: 1;
}

.program-apply {
  color: var(--orange);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  margin-top: 0.5rem;
  transition: letter-spacing var(--transition);
}

.program-apply:hover { letter-spacing: 0.03em; color: var(--orange); }

/* TESTIMONIALS */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

.testimonial-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.testimonial-stars { font-size: 0.875rem; }

.testimonial-body {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text);
  flex: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.testimonial-avatar {
  width: 36px;
  height: 36px;
  background: var(--blue-glow);
  border: 1px solid var(--blue);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

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

/* CTA SECTION */
.cta-section {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.cta-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--orange);
  padding: 3rem;
}

.cta-left h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0.75rem 0 1rem;
}

.cta-warning {
  font-style: italic;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.75rem;
}

.cta-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  flex-shrink: 0;
}

/* FOOTER */
.landing-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-copy { margin-left: auto; }

/* RESPONSIVE */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .math-card { grid-template-columns: 1fr; gap: 2rem; }
  .math-grid { grid-template-columns: 1fr; }
  .math-divider { height: 1px; width: 100%; }
  .cta-box { grid-template-columns: 1fr; }
  .cta-right { align-items: flex-start; text-align: left; }
  .process-steps { flex-direction: column; }
  .process-connector { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .footer-copy { margin-left: 0; }
}