/* ─── Base reset & custom properties ─── */
:root {
  --bg: #09090F;
  --bg-surface: #111118;
  --bg-elevated: #191924;
  --amber: #F5A623;
  --amber-dim: rgba(245, 166, 35, 0.15);
  --teal: #00C2B8;
  --teal-dim: rgba(0, 194, 184, 0.1);
  --text: #E8E8F0;
  --text-muted: rgba(232, 232, 240, 0.5);
  --text-dim: rgba(232, 232, 240, 0.3);
  --border: rgba(255, 255, 255, 0.07);
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Instrument Sans', system-ui, sans-serif;
  --max-w: 1160px;
  --section-pad: 120px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--amber-dim); border-radius: 3px; }

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
  background: rgba(9, 9, 15, 0.8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.nav-tag {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--teal);
  background: var(--teal-dim);
  border: 1px solid rgba(0, 194, 184, 0.2);
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ─── Hero ─── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 140px 48px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(245, 166, 35, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-waves {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--amber);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 32px;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 28px;
}

.hero-lede {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 40px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.badge {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--amber);
  background: var(--amber-dim);
  border: 1px solid rgba(245, 166, 35, 0.2);
  padding: 6px 16px;
  border-radius: 100px;
  letter-spacing: 0.04em;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

/* ─── Problem Section ─── */
.problem {
  padding: var(--section-pad) 48px;
  border-top: 1px solid var(--border);
}

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

.problem-label {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--amber);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.problem-statement {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.2;
  margin-bottom: 72px;
}

.problem-statement p { margin-bottom: 12px; }

.problem-contrast {
  color: var(--amber);
  font-style: italic;
}

.problem-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding-top: 56px;
  border-top: 1px solid var(--border);
}

.fact-item {}

.fact-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--text);
  line-height: 1;
  margin-bottom: 8px;
}

.fact-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ─── Section commons ─── */
.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--amber);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

/* ─── How It Works ─── */
.howitworks {
  padding: var(--section-pad) 48px;
  border-top: 1px solid var(--border);
}

.steps-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
}

.step-card {
  background: var(--bg);
  padding: 56px 48px;
  position: relative;
}

.step-number {
  font-family: var(--font-serif);
  font-size: 4rem;
  color: var(--amber-dim);
  line-height: 1;
  margin-bottom: 32px;
  font-weight: 400;
}

.step-icon {
  margin-bottom: 24px;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 16px;
  color: var(--text);
}

.step-body {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ─── Features ─── */
.features {
  padding: var(--section-pad) 48px;
  border-top: 1px solid var(--border);
}

.features-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
}

.feature-card {
  background: var(--bg);
  padding: 48px 40px;
}

.feature-main {
  grid-column: span 2;
  background: var(--bg-surface);
}

.feature-icon-wrap {
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--text);
}

.feature-body {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ─── Listening Section ─── */
.listening {
  padding: var(--section-pad) 48px;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}

.listening-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.listening-visual svg {
  width: 100%;
  height: auto;
}

.listening-headline {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 24px;
}

.listening-body {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 48px;
}

.listening-stat {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 4rem;
  font-weight: 400;
  line-height: 1;
  color: var(--amber);
}

.stat-unit {
  font-size: 1.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ─── Closing ─── */
.closing {
  padding: var(--section-pad) 48px;
  border-top: 1px solid var(--border);
}

.closing-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.closing-headline {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin-bottom: 28px;
}

.closing-body {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 64px;
}

.closing-quote {
  position: relative;
  padding: 40px 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--amber);
  text-align: left;
}

.quote-mark {
  font-family: var(--font-serif);
  font-size: 6rem;
  color: var(--amber-dim);
  line-height: 0.5;
  position: absolute;
  top: 32px;
  left: 40px;
  pointer-events: none;
}

.closing-quote p {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--text-muted);
  line-height: 1.6;
  padding-left: 16px;
}

.quote-attr {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 16px;
  padding-left: 16px;
}

/* ─── Footer ─── */
.footer {
  border-top: 1px solid var(--border);
  padding: 80px 48px 40px;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--border);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--text);
}

.footer-desc {
  font-size: 0.8rem;
  color: var(--text-dim);
  max-width: 300px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 80px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-col-title {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.footer-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s;
}

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

.footer-bottom {
  max-width: var(--max-w);
  margin: 32px auto 0;
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.footer-polisa {
  color: var(--teal);
  opacity: 0.6;
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 120px 24px 80px; }
  .hero-headline { font-size: 2.5rem; }
  .problem, .howitworks, .features, .listening, .closing { padding-left: 24px; padding-right: 24px; }
  .problem-facts { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-main { grid-column: span 1; }
  .listening-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-links { gap: 40px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}

@media (max-width: 480px) {
  .nav { padding: 14px 20px; }
  .hero { padding: 100px 20px 60px; }
  .hero-headline { font-size: 2rem; }
  .hero-lede { font-size: 1rem; }
  .hero-badges { flex-direction: column; align-items: center; }
  .problem-statement { font-size: 1.5rem; }
  .fact-number { font-size: 2rem; }
  .problem-facts { grid-template-columns: 1fr 1fr; gap: 24px; }
  .step-card, .feature-card { padding: 40px 28px; }
  .closing-quote { padding: 32px 32px; }
}