/* ============================================
   CO4 Consulting — Landing Page Styles
   ============================================ */

:root {
  --navy-950: #060b16;
  --navy-900: #0a1224;
  --navy-800: #101c33;
  --navy-700: #182a46;
  --navy-600: #23395c;
  --gold-400: #ffd257;
  --gold-500: #f5b942;
  --gold-600: #d99a1f;
  --ink-100: #f5f7fb;
  --ink-300: #c7d0e0;
  --ink-500: #8b96ac;

  --font-display: "Sora", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;

  --container-width: 1160px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html, body {
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--navy-950);
  color: var(--ink-100);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.6em;
  color: var(--ink-100);
}

p {
  margin: 0 0 1em;
  color: var(--ink-300);
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-600));
  color: var(--navy-950);
}

.btn-primary:hover {
  box-shadow: 0 12px 24px -8px rgba(245, 185, 66, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-100);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-ghost:hover {
  border-color: var(--gold-400);
  color: var(--gold-400);
}

.btn-small {
  padding: 10px 20px;
  font-size: 0.85rem;
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  background: transparent;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  background: rgba(6, 11, 22, 0.85);
  backdrop-filter: blur(10px);
  padding: 12px 0;
  box-shadow: 0 8px 24px -12px rgba(0, 0, 0, 0.6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-logo {
  width: 91px;
  height: auto;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--ink-100);
}

.brand-name span {
  font-weight: 400;
  color: var(--ink-300);
  margin-left: 4px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a:not(.btn) {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-300);
  position: relative;
  transition: color var(--transition);
}

.site-nav a:not(.btn):hover {
  color: var(--ink-100);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink-100);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-color: var(--navy-950);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 34% center;
  transform: scale(1.05);
  -webkit-mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent),
    linear-gradient(to bottom, transparent, black 12%, black 85%, transparent);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent),
    linear-gradient(to bottom, transparent, black 12%, black 85%, transparent);
  mask-composite: intersect;
}

/* Native image is 1920px wide — beyond that, "cover" would upscale it
   past its real resolution and it starts looking soft/blurry. Lock it
   to native size once the viewport exceeds that so it stays sharp on
   wide/4K screens; the navy fallback colour blends with the overlay
   gradient to hide the exposed edges. */
@media (min-width: 1920px) {
  .hero-bg {
    background-size: 1920px auto;
    transform: scale(1);
  }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(6, 11, 22, 0.35), rgba(6, 11, 22, 0.85) 60%),
    linear-gradient(180deg, rgba(6, 11, 22, 0.55) 0%, rgba(6, 11, 22, 0.75) 55%, var(--navy-950) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 720px;
  max-width: calc(100vw - 48px);
  margin: 0;
  padding-top: 120px;
  margin-left: max(24px, calc((100vw - var(--container-width)) / 2 + 24px));
}

.eyebrow,
.section-eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-400);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(1.47rem, 3.33vw, 2.27rem);
  margin-bottom: 0.5em;
}

.hero-lede {
  font-size: 1.1rem;
  color: var(--ink-300);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.scroll-cue {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-radius: 20px;
  z-index: 1;
}

.scroll-cue span {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  background: var(--gold-400);
  border-radius: 2px;
  animation: scroll-cue-move 1.8s ease-in-out infinite;
}

@keyframes scroll-cue-move {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(14px); }
  100% { opacity: 0; transform: translateY(0); }
}

/* ---------- Section basics ---------- */

section {
  padding: 120px 0;
}

.section-lede {
  max-width: 620px;
  font-size: 1.05rem;
}

/* ---------- Services ---------- */

.services {
  background: var(--navy-950);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 56px;
}

.service-card {
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--navy-700);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold-600);
  box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.6);
}

.service-index {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--gold-400);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.service-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5em;
}

.service-points {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--navy-700);
}

.service-points li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  color: var(--ink-300);
  font-size: 0.92rem;
}

.service-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold-400);
}

/* ---------- About ---------- */

.about {
  background: var(--navy-900);
  border-top: 1px solid var(--navy-700);
  border-bottom: 1px solid var(--navy-700);
}

.about-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-stats {
  display: grid;
  gap: 24px;
}

.stat {
  background: var(--navy-800);
  border: 1px solid var(--navy-700);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.2rem;
  color: var(--gold-400);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--ink-500);
}

/* ---------- Contact ---------- */

.contact {
  background: var(--navy-950);
  text-align: center;
}

.contact-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact h2 {
  font-size: clamp(1.2rem, 2.67vw, 1.6rem);
}

.contact-details {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 32px;
}

.contact-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px 40px;
  background: var(--navy-800);
  border: 1px solid var(--navy-700);
  border-radius: var(--radius-md);
  min-width: 220px;
  transition: transform var(--transition), border-color var(--transition);
}

.contact-link:hover {
  transform: translateY(-4px);
  border-color: var(--gold-500);
}

.contact-label {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.contact-value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink-100);
}

/* ---------- Legal / policy pages ---------- */

.legal-hero {
  padding-top: calc(120px + 64px);
  padding-bottom: 64px;
  background: var(--navy-900);
  border-bottom: 1px solid var(--navy-700);
}

.legal-hero h1 {
  font-size: clamp(1.33rem, 2.67vw, 1.87rem);
}

.legal-hero .section-lede {
  max-width: none;
}

.legal-content {
  padding-top: 80px;
  padding-bottom: 100px;
  background: var(--navy-950);
}


.legal-content h2 {
  font-size: 1.3rem;
  margin-top: 2.2em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--navy-700);
}

.legal-content h2:first-of-type {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  color: var(--ink-300);
}

.legal-content ul {
  margin: 0 0 1em;
  padding-left: 4px;
}

.legal-content li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
}

.legal-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-400);
}

.legal-content a {
  color: var(--gold-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.legal-content a:hover {
  color: var(--gold-500);
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--navy-700);
  background: var(--navy-950);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  text-align: center;
}

.footer-copy {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-500);
}

.footer-sep {
  font-size: 0.85rem;
  color: var(--ink-500);
}

.footer-link {
  font-size: 0.85rem;
  color: var(--ink-500);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--gold-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Back to top ---------- */

.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--navy-700);
  background: var(--navy-800);
  color: var(--gold-400);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 90;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--gold-500);
  color: var(--gold-500);
}

/* ---------- Reveal-on-scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .about-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    height: 100svh;
    width: min(78vw, 320px);
    background: var(--navy-900);
    border-left: 1px solid var(--navy-700);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    padding: 40px;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 99;
  }

  .site-nav.open {
    transform: translateX(0);
  }

  .site-nav a:not(.btn) {
    padding: 14px 4px;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--navy-700);
  }

  .site-nav a.btn {
    margin-top: 16px;
  }

  .nav-toggle {
    display: flex;
    z-index: 101;
  }

  .nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  section {
    padding: 88px 0;
  }

  .hero-content {
    padding-top: 100px;
  }

  .contact-link {
    min-width: 0;
    width: 100%;
    max-width: 320px;
  }
}