/* ===== Design Tokens — Kortezh (dark, authoritative, tech-consulting) ===== */
:root {
  color-scheme: light;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'General Sans', 'Inter', sans-serif;
  --font-body: 'General Sans', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Type scale — fluid clamp */
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.15vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.06rem + 0.3vw, 1.25rem);
  --text-xl: clamp(1.375rem, 1.25rem + 0.5vw, 1.625rem);
  --text-2xl: clamp(1.75rem, 1.55rem + 0.9vw, 2.25rem);
  --text-3xl: clamp(2.25rem, 1.9rem + 1.6vw, 3.25rem);
  --text-hero: clamp(2.75rem, 2.1rem + 2.8vw, 4.75rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  --transition-interactive: 180ms cubic-bezier(0.22, 1, 0.36, 1);

  /* ==== Light mode palette — authoritative navy/graphite + brass accent ==== */
  --color-bg: oklch(97.5% 0.004 90);
  --color-surface: oklch(99% 0.002 90);
  --color-surface-2: oklch(95.5% 0.006 90);
  --color-border: oklch(85% 0.01 90);
  --color-text: oklch(20% 0.015 260);
  --color-text-muted: oklch(45% 0.015 260);
  --color-text-faint: oklch(65% 0.01 260);
  --color-primary: oklch(38% 0.09 250);
  --color-primary-hover: oklch(28% 0.09 250);
  --color-accent: oklch(62% 0.13 65);
  --color-accent-hover: oklch(54% 0.14 65);
  --color-error: oklch(52% 0.16 20);
  --color-warning: oklch(58% 0.14 55);
  --color-success: oklch(48% 0.1 145);

  --shadow-sm: 0 1px 2px oklch(20% 0.02 260 / 0.06), 0 2px 8px oklch(20% 0.02 260 / 0.04);
  --shadow-md: 0 2px 6px oklch(20% 0.02 260 / 0.08), 0 8px 24px oklch(20% 0.02 260 / 0.06);
  --shadow-lg: 0 8px 16px oklch(20% 0.02 260 / 0.1), 0 24px 48px oklch(20% 0.02 260 / 0.08);
}

[data-theme='dark'] {
  color-scheme: dark;
  --color-bg: oklch(17% 0.014 260);
  --color-surface: oklch(20.5% 0.015 260);
  --color-surface-2: oklch(24% 0.016 260);
  --color-border: oklch(32% 0.02 260);
  --color-text: oklch(93% 0.005 90);
  --color-text-muted: oklch(70% 0.012 260);
  --color-text-faint: oklch(50% 0.012 260);
  --color-primary: oklch(78% 0.06 235);
  --color-primary-hover: oklch(86% 0.05 235);
  --color-accent: oklch(74% 0.13 65);
  --color-accent-hover: oklch(80% 0.12 65);
  --color-error: oklch(68% 0.15 20);
  --color-warning: oklch(72% 0.13 55);
  --color-success: oklch(70% 0.11 145);

  --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.3), 0 2px 8px oklch(0% 0 0 / 0.2);
  --shadow-md: 0 2px 6px oklch(0% 0 0 / 0.35), 0 8px 24px oklch(0% 0 0 / 0.25);
  --shadow-lg: 0 8px 20px oklch(0% 0 0 / 0.4), 0 24px 56px oklch(0% 0 0 / 0.3);
}

/* ===== Base typography ===== */
body {
  background:
    radial-gradient(ellipse 900px 500px at 15% -5%, oklch(from var(--color-primary) l c h / 0.06), transparent),
    var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  flex-shrink: 0;
}

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--narrow {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(140%);
  background: oklch(from var(--color-bg) l c h / 0.72);
  border-bottom: 1px solid oklch(from var(--color-border) l c h / 0.6);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
}
.nav__logo svg { color: var(--color-primary); }
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
}
.nav__links a:hover { color: var(--color-text); }
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.nav__toggle {
  display: none;
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-surface);
}
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-text-faint); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme='dark'] .theme-toggle .icon-moon { display: none; }
[data-theme='dark'] .theme-toggle .icon-sun { display: block; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--color-primary);
  color: oklch(99% 0.002 90);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover { background: var(--color-primary-hover); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--ghost:hover { border-color: var(--color-text-faint); background: var(--color-surface); }
.btn--accent {
  background: var(--color-accent);
  color: oklch(15% 0.02 65);
}
.btn--accent:hover { background: var(--color-accent-hover); transform: translateY(-1px); }

/* ===== Hero ===== */
.hero {
  padding-top: clamp(7rem, 14vw, 10rem);
  padding-bottom: clamp(var(--space-16), 8vw, var(--space-24));
  position: relative;
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-16);
  align-items: center;
}
.hero__eyebrow { margin-bottom: var(--space-5); }
.hero h1 {
  font-size: var(--text-hero);
  margin-bottom: var(--space-6);
}
.hero h1 .accent { color: var(--color-primary); }
.hero__lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-bottom: var(--space-8);
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}
.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: var(--space-8);
}
.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.hero__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero__visual {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}
.hero__visual img { width: 100%; height: 100%; object-fit: cover; }
.hero__visual-tag {
  position: absolute;
  bottom: var(--space-5);
  left: var(--space-5);
  right: var(--space-5);
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.hero__visual-tag svg { color: var(--color-accent); flex-shrink: 0; width: 22px; height: 22px; }
.hero__visual-tag strong { font-size: var(--text-sm); display: block; }
.hero__visual-tag span { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ===== Logo strip ===== */
.logo-strip { padding-block: var(--space-10); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.logo-strip__label { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-faint); margin-bottom: var(--space-6); text-align: center; }
.logo-strip__row { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-10); align-items: center; }
.logo-strip__row span { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-text-muted); }

/* ===== Section headers ===== */
.section-head { max-width: 640px; margin-bottom: var(--space-12); }
.section-head h2 { font-size: var(--text-3xl); margin-block: var(--space-4); }
.section-head p { color: var(--color-text-muted); font-size: var(--text-lg); }

/* ===== Tracks (services) ===== */
.tracks { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.track-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.track-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: oklch(from var(--color-primary) l c h / 0.1);
  color: var(--color-primary);
}
.track-card--accent .track-card__icon { background: oklch(from var(--color-accent) l c h / 0.15); color: var(--color-accent); }
.track-card__icon svg { width: 26px; height: 26px; }
.track-card h3 { font-size: var(--text-xl); }
.track-card__desc { color: var(--color-text-muted); font-size: var(--text-base); }
.track-card__list { display: flex; flex-direction: column; gap: var(--space-3); margin-top: var(--space-2); }
.track-card__list li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--text-sm);
  padding-block: var(--space-3);
  border-top: 1px solid var(--color-border);
  max-width: none;
}
.track-card__list li:first-child { border-top: none; padding-top: 0; }
.track-card__list b { color: var(--color-text); font-weight: 600; }
.track-card__list .price { color: var(--color-text-muted); font-variant-numeric: tabular-nums; white-space: nowrap; text-align: right; }
.track-card__foot { display: flex; flex-direction: column; align-items: stretch; gap: var(--space-3); margin-top: auto; padding-top: var(--space-4); border-top: 1px dashed var(--color-border); }
.track-card__cycle { font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.05em; }
.track-card__foot .btn { width: 100%; justify-content: center; }

/* ===== Process ===== */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); counter-reset: step; }
.process-step {
  position: relative;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}
.process-step__num {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  opacity: 0.35;
  margin-bottom: var(--space-3);
}
.process-step h3 { font-size: var(--text-base); margin-bottom: var(--space-2); }
.process-step p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ===== About / expertise ===== */
.about { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--space-16); align-items: start; }
.about__portrait {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 3/4;
  box-shadow: var(--shadow-md);
}
.about__portrait img { width: 100%; height: 100%; object-fit: cover; }
.about__credentials { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); margin-top: var(--space-8); }
.credential { padding: var(--space-4); border-radius: var(--radius-md); background: var(--color-surface); border: 1px solid var(--color-border); }
.credential strong { display: block; font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-text); }
.credential span { font-size: var(--text-xs); color: var(--color-text-muted); }
.about__body p { color: var(--color-text-muted); margin-bottom: var(--space-5); font-size: var(--text-base); }
.about__body p:last-child { margin-bottom: 0; }
.about__quote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-block: var(--space-6);
  font-style: normal;
}

/* ===== Trust / why ===== */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.why-card { padding: var(--space-6); }
.why-card__icon { width: 44px; height: 44px; color: var(--color-primary); margin-bottom: var(--space-4); }
.why-card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.why-card p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ===== CTA ===== */
.cta {
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary), oklch(from var(--color-primary) calc(l - 0.1) c h));
  padding: clamp(var(--space-10), 6vw, var(--space-16));
  text-align: center;
  color: oklch(98% 0.005 90);
  position: relative;
  overflow: hidden;
}
[data-theme='dark'] .cta { background: linear-gradient(135deg, oklch(30% 0.06 250), oklch(20% 0.04 250)); }
.cta::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 0%, oklch(from var(--color-accent) l c h / 0.35), transparent 60%);
  pointer-events: none;
}
.cta h2 { color: oklch(99% 0.002 90); font-size: var(--text-3xl); margin-bottom: var(--space-4); position: relative; }
.cta p { color: oklch(92% 0.01 90); font-size: var(--text-lg); max-width: 56ch; margin-inline: auto; margin-bottom: var(--space-8); position: relative; }
.cta__actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; position: relative; }
.cta .btn--ghost { border-color: oklch(90% 0.005 90 / 0.35); color: oklch(98% 0.002 90); }
.cta .btn--ghost:hover { background: oklch(100% 0 0 / 0.08); }

/* ===== Contact ===== */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); }
.contact-list { display: flex; flex-direction: column; gap: var(--space-5); }
.contact-item { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-5); border-radius: var(--radius-md); background: var(--color-surface); border: 1px solid var(--color-border); text-decoration: none; color: inherit; }
.contact-item:hover { border-color: var(--color-primary); }
.contact-item__icon { width: 44px; height: 44px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; background: oklch(from var(--color-primary) l c h / 0.1); color: var(--color-primary); flex-shrink: 0; }
.contact-item__icon svg { width: 20px; height: 20px; }
.contact-item strong { display: block; font-size: var(--text-sm); }
.contact-item span { font-size: var(--text-sm); color: var(--color-text-muted); }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--color-border); padding-block: var(--space-8); }
.footer__inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-4); }
.footer__logo { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-display); font-weight: 700; color: var(--color-text-muted); text-decoration: none; font-size: var(--text-sm); }
.footer p { color: var(--color-text-faint); font-size: var(--text-xs); max-width: none; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 700ms cubic-bezier(0.22,1,0.36,1), transform 700ms cubic-bezier(0.22,1,0.36,1); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .tracks { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 960px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { max-width: 480px; margin-inline: auto; }
  .about { grid-template-columns: 1fr; }
  .about__portrait { max-width: 360px; margin-inline: auto; }
  .tracks { grid-template-columns: 1fr; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav__links { display: none; }
  .hero__stats { grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
  .process { grid-template-columns: 1fr; }
  .hero__actions .btn { flex: 1 1 auto; }
}