/* ── Variables ───────────────────────────────── */
:root {
  --bg:           #0A0A0F;
  --bg-card:      #15151F;
  --bg-card-2:    #1A1A28;
  --border:       rgba(255,255,255,.07);
  --border-hover: rgba(34,197,94,.3);
  --green:        #22C55E;
  --green-light:  #4ADE80;
  --yellow:       #EAB308;
  --text-main:    #F0F0F0;
  --text-muted:   #9CA3AF;
  --text-soft:    #6B7280;
  --radius-sm:    0.5rem;
  --radius:       0.75rem;
  --radius-lg:    1.25rem;
  --radius-xl:    1.75rem;
}

/* ── Reset ───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scrollbar-width: thin; scrollbar-color: #22C55E22 transparent; }
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-thumb { background: var(--green); border-radius: 4px; opacity: 0.3; }
::selection { background: rgba(34,197,94,.2); color: var(--text-main); }

/* ── Body ────────────────────────────────────── */
body {
  background-color: var(--bg);
  font-family: 'Inter', 'Segoe UI', sans-serif;
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Sticky Header ───────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(10,10,15,.8);
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
.site-header.scrolled {
  background: rgba(10,10,15,.95);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  font-weight: 800;
  font-size: .78rem;
  letter-spacing: .22em;
  color: var(--green);
  flex-shrink: 0;
  cursor: default;
}

.header-nav {
  display: flex;
  gap: 24px;
  flex: 1;
}
.header-nav a {
  font-size: .88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color .2s;
}
.header-nav a:hover { color: var(--text-main); }

.btn-header {
  flex-shrink: 0;
  font-size: .85rem;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius);
  background: transparent;
  border: 1px solid rgba(34,197,94,.4);
  color: var(--green);
  text-decoration: none;
  transition: background .25s, border-color .25s;
}
.btn-header:hover {
  background: rgba(34,197,94,.1);
  border-color: var(--green);
}

/* ── Hero ────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(34,197,94,.15) 0%, transparent 65%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(234,179,8,.06) 0%, transparent 60%),
    var(--bg);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: 999px;
  background: rgba(34,197,94,.1);
  border: 1px solid rgba(34,197,94,.25);
  font-size: .82rem;
  font-weight: 500;
  color: var(--green-light);
  letter-spacing: .04em;
}
.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(.85); }
}

.hero-title {
  font-size: clamp(2.2rem, 7vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.gradient-text {
  background: linear-gradient(135deg, var(--green-light), var(--yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 560px;
}

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

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  margin-top: 8px;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--green), var(--yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: .75rem;
  color: var(--text-muted);
  text-align: center;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* Floating nodes */
.hero-nodes { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.node {
  position: absolute;
  border-radius: 50%;
  opacity: .4;
  animation: nodeFloat 6s ease-in-out infinite;
}
.node-1 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(34,197,94,.08), transparent 70%);
  top: 10%; left: -80px;
  animation-delay: 0s;
}
.node-2 {
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(234,179,8,.06), transparent 70%);
  top: 50%; right: -60px;
  animation-delay: 2s;
}
.node-3 {
  width: 150px; height: 150px;
  background: radial-gradient(circle, rgba(34,197,94,.06), transparent 70%);
  bottom: 10%; left: 30%;
  animation-delay: 4s;
}
@keyframes nodeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* ── Buttons ─────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--green), var(--yellow));
  color: #000;
  font-weight: 800;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform .25s, box-shadow .25s, filter .25s;
  letter-spacing: .01em;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(34,197,94,.4), 0 8px 24px rgba(0,0,0,.4);
  filter: brightness(1.05);
}
.btn-primary.btn-large {
  font-size: 1.05rem;
  padding: 16px 40px;
}
.btn-primary.btn-sm {
  font-size: .9rem;
  padding: 10px 24px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  cursor: pointer;
  text-decoration: none;
  transition: color .25s, border-color .25s, transform .25s;
}
.btn-ghost:hover {
  color: var(--text-main);
  border-color: rgba(255,255,255,.2);
  transform: translateY(-2px);
}

/* ── Marquee ─────────────────────────────────── */
.marquee-wrap {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(34,197,94,.03);
  padding: 14px 0;
}
.marquee-track {
  display: flex;
  gap: 32px;
  white-space: nowrap;
  animation: marquee 28s linear infinite;
  width: max-content;
}
.marquee-track span {
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-soft);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.marquee-dot {
  color: var(--green) !important;
  opacity: .5;
  font-size: .6rem !important;
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ── Page Body ───────────────────────────────── */
.page-body {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Sections ────────────────────────────────── */
.section {
  padding: 72px 0 0;
}

.section-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 32px;
}

/* ── Pain ────────────────────────────────────── */
.pain-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.pain-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: .97rem;
  color: var(--text-main);
  line-height: 1.65;
  transition: border-color .2s, background .2s;
}
.pain-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-2);
}
.pain-icon {
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.pain-note {
  margin-top: 20px;
  font-size: .9rem;
  color: var(--text-soft);
  font-style: italic;
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(34,197,94,.04);
}

/* ── Solution ────────────────────────────────── */
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.solution-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: .97rem;
  color: var(--text-muted);
  line-height: 1.8;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
}
.solution-text strong { color: var(--text-main); }
.highlight-card {
  padding: 28px;
  background: linear-gradient(135deg, rgba(34,197,94,.08), rgba(234,179,8,.04));
  border: 1px solid rgba(34,197,94,.2);
  border-radius: var(--radius-xl);
  font-size: .97rem;
  color: var(--text-muted);
  line-height: 1.8;
  font-style: italic;
  position: relative;
}
.highlight-card-icon {
  font-size: 1.4rem;
  color: var(--green);
  margin-bottom: 12px;
}

/* ── Semesters ───────────────────────────────── */
.semesters {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.semester-card {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: border-color .3s, transform .3s;
}
.semester-card:hover {
  border-color: rgba(34,197,94,.25);
  transform: translateX(4px);
}
.semester-num-wrap {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(34,197,94,.15), rgba(234,179,8,.1));
  border: 1px solid rgba(34,197,94,.2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.semester-num {
  font-size: 1rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--green), var(--yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.semester-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.3;
}
.semester-text {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.75;
}
.program-note {
  margin-top: 24px;
  font-size: .88rem;
  color: var(--text-soft);
  font-style: italic;
  line-height: 1.7;
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ── Results ─────────────────────────────────── */
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.result-card {
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color .25s, transform .25s;
}
.result-card:hover {
  border-color: rgba(34,197,94,.3);
  transform: translateY(-3px);
}
.result-icon {
  font-size: 1.1rem;
  color: var(--green);
  margin-bottom: 10px;
}
.result-title {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.3;
}
.result-text {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Principles ──────────────────────────────── */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.principle-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  transition: border-color .3s;
}
.principle-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--yellow));
  opacity: 0;
  transition: opacity .3s;
}
.principle-card:hover { border-color: rgba(34,197,94,.3); }
.principle-card:hover::before { opacity: 1; }
.principle-num {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: rgba(34,197,94,.15);
  margin-bottom: 12px;
  line-height: 1;
}
.principle-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}
.principle-text {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ── FAQ ─────────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color .3s;
}
.faq-item:hover { border-color: rgba(34,197,94,.2); }
.faq-item.open { border-color: rgba(34,197,94,.35); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  cursor: pointer;
  font-size: .97rem;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
  transition: color .2s;
}
.faq-q:hover { color: var(--green-light); }
.faq-arrow {
  color: var(--green);
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform .3s;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a {
  display: none;
  padding: 0 22px 20px;
  padding-top: 16px;
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px solid var(--border);
}
.faq-item.open .faq-a { display: block; }

/* ── CTA Section ─────────────────────────────── */
.cta-section {
  position: relative;
  text-align: center;
  padding: 72px 48px;
  margin-top: 72px;
  background: var(--bg-card);
  border: 1px solid rgba(34,197,94,.2);
  border-radius: 2rem;
  overflow: hidden;
}
.cta-glow {
  position: absolute;
  top: -80px; left: 50%;
  transform: translateX(-50%);
  width: 500px; height: 300px;
  background: radial-gradient(ellipse, rgba(34,197,94,.12) 0%, transparent 70%);
  pointer-events: none;
}
.cta-title {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 24px;
}
.cta-sub {
  font-size: .97rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 580px;
  margin: 0 auto 16px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}

/* ── Footer ──────────────────────────────────── */
.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
  margin-top: 64px;
}
.footer-brand {
  font-weight: 800;
  font-size: .78rem;
  letter-spacing: .22em;
  color: var(--green);
  cursor: default;
}
.footer-links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-soft);
  text-decoration: none;
  transition: color .25s;
}
.footer-links a:hover { color: var(--green); }
.footer-copy {
  font-size: .75rem;
  color: rgba(156,163,175,.3);
  text-align: center;
}

/* ── Sticky Bar ──────────────────────────────── */
.sticky-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: rgba(21,21,31,.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(34,197,94,.2);
  border-radius: 999px;
  box-shadow: 0 8px 40px rgba(0,0,0,.5), 0 0 20px rgba(34,197,94,.1);
  transition: transform .5s cubic-bezier(.34,1.56,.64,1);
  white-space: nowrap;
}
.sticky-bar.visible { transform: translateX(-50%) translateY(0); }
.sticky-text {
  font-size: .9rem;
  color: var(--text-muted);
}

/* ── Reveal ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── Mobile ──────────────────────────────────── */
@media (max-width: 900px) {
  .results-grid { grid-template-columns: 1fr 1fr; }
  .principles-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .header-nav { display: none; }
  .hero-stats { flex-direction: column; gap: 16px; padding: 20px; }
  .stat-divider { width: 40px; height: 1px; }
  .cta-section { padding: 48px 24px; }
}

@media (max-width: 600px) {
  .page-body { padding: 0 16px 60px; }
  .results-grid { grid-template-columns: 1fr; }
  .semester-card { flex-direction: column; gap: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { width: 100%; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .sticky-bar { width: calc(100% - 32px); justify-content: space-between; }
}