/* ============================================================
   ENGAGEMENT COLLECTIVE — Global Stylesheet
   Black & Gold | Conference & Event Management
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Outfit:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Core palette */
  --black: #0A0A0A;
  --black-soft: #141414;
  --black-card: #1A1A1A;
  --black-elevated: #222222;
  --gold: #C9A84C;
  --gold-light: #D4B96A;
  --gold-dark: #A68A3E;
  --gold-muted: rgba(201, 168, 76, 0.15);
  --gold-glow: rgba(201, 168, 76, 0.08);
  --white: #F5F2EB;
  --white-pure: #FFFFFF;
  --gray-100: #E8E4DC;
  --gray-200: #D1CCC2;
  --gray-300: #B0A99E;
  --gray-400: #8A8279;
  --gray-500: #6B6459;
  --gray-600: #4A453D;
  --gray-700: #2E2A24;

  /* Typography */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Outfit', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-med: 400ms;
  --duration-slow: 700ms;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--white);
  background-color: var(--black);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5 { font-family: var(--font-display); line-height: 1.15; }
h1 { font-size: clamp(2.8rem, 6vw, 4.5rem); font-weight: 500; letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 500; letter-spacing: -0.01em; }
h3 { font-size: clamp(1.4rem, 2.5vw, 1.8rem); font-weight: 600; }
h4 { font-size: 1.15rem; font-family: var(--font-body); font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }

p { max-width: 68ch; }

.text-gold { color: var(--gold); }
.text-muted { color: var(--gray-400); }
.text-center { text-align: center; }

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section--dark { background: var(--black-soft); }
.section--card { background: var(--black-card); }

/* ---- Gold accent line ---- */
.gold-rule {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  border: none;
  margin: var(--space-lg) 0;
}

.gold-rule--center { margin-left: auto; margin-right: auto; }

/* ---- Diamond decorator ---- */
.diamond {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--gold);
  transform: rotate(45deg);
  flex-shrink: 0;
}

/* ============================================================
   HEADER / NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.12);
  transition: background var(--duration-med) var(--ease-out);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  max-width: 1400px;
  margin: 0 auto;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo-mark {
  width: 42px;
  height: 42px;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.logo-text span {
  display: block;
  font-size: 0.6rem;
  font-family: var(--font-body);
  font-weight: 300;
  letter-spacing: 0.25em;
  color: var(--gray-400);
  text-transform: uppercase;
  margin-top: 2px;
}

/* Desktop nav */
.main-nav { display: flex; align-items: center; gap: var(--space-xl); }

.main-nav a {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-300);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width var(--duration-med) var(--ease-out);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--gold);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.nav-cta {
  font-size: 0.8rem !important;
  padding: 0.6rem 1.4rem;
  border: 1px solid var(--gold);
  color: var(--gold) !important;
  transition: all var(--duration-fast) var(--ease-out) !important;
}

.nav-cta:hover {
  background: var(--gold) !important;
  color: var(--black) !important;
}

/* Mobile hamburger */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--gold);
  transition: all var(--duration-fast) var(--ease-out);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(30px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
}

.mobile-nav.open { display: flex; }

.mobile-nav a {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--white);
  transition: color var(--duration-fast);
}

.mobile-nav a:hover { color: var(--gold); }

.mobile-close {
  position: absolute;
  top: var(--space-xl);
  right: var(--space-xl);
  background: none;
  border: none;
  color: var(--gold);
  font-size: 2rem;
  cursor: pointer;
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .mobile-toggle { display: flex; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

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

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(201, 168, 76, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(201, 168, 76, 0.04) 0%, transparent 50%),
    linear-gradient(180deg, var(--black) 0%, var(--black-soft) 100%);
  z-index: 1;
}

/* Animated geometric grid */
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(var(--gold) 1px, transparent 1px),
    linear-gradient(90deg, var(--gold) 1px, transparent 1px);
  background-size: 80px 80px;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 750px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  padding: 0.5rem 1.2rem;
  border: 1px solid rgba(201, 168, 76, 0.25);
  background: rgba(201, 168, 76, 0.06);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s var(--ease-out) both;
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s var(--ease-out) 0.15s both;
}

.hero h1 em {
  font-style: italic;
  color: var(--gold);
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--gray-300);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s var(--ease-out) 0.3s both;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s var(--ease-out) 0.45s both;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.9rem 2rem;
  border: none;
  cursor: pointer;
  transition: all var(--duration-med) var(--ease-out);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--black);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(201, 168, 76, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--gold);
  border: 1px solid rgba(201, 168, 76, 0.4);
}

.btn-outline:hover {
  border-color: var(--gold);
  background: rgba(201, 168, 76, 0.08);
  transform: translateY(-2px);
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  margin-bottom: var(--space-3xl);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-md);
}

.section-header h2 {
  color: var(--white);
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--gray-400);
  max-width: 600px;
}

.section-header--center {
  text-align: center;
}

.section-header--center p {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   CAPABILITY CARDS
   ============================================================ */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.cap-card {
  background: var(--black-card);
  border: 1px solid rgba(201, 168, 76, 0.08);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: all var(--duration-med) var(--ease-out);
}

.cap-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0;
  transition: opacity var(--duration-med);
}

.cap-card:hover {
  border-color: rgba(201, 168, 76, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.cap-card:hover::before { opacity: 1; }

.cap-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gold-muted);
  margin-bottom: var(--space-lg);
}

.cap-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--gold);
  fill: none;
  stroke-width: 1.5;
}

.cap-card h3 {
  color: var(--white);
  margin-bottom: var(--space-sm);
  font-size: 1.3rem;
}

.cap-card p {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ============================================================
   STATS BAR
   ============================================================ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-3xl) 0;
  border-top: 1px solid rgba(201, 168, 76, 0.1);
  border-bottom: 1px solid rgba(201, 168, 76, 0.1);
}

.stat-item { text-align: center; }

.stat-number {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 500;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}

/* ============================================================
   KEY DATA / FEDERAL REGISTRATION
   ============================================================ */
.key-data {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

@media (max-width: 768px) {
  .key-data { grid-template-columns: 1fr; }
}

.data-list { list-style: none; }

.data-list li {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid rgba(201, 168, 76, 0.08);
}

.data-list .label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  min-width: 90px;
}

.data-list .value {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--gray-200);
}

.capability-list { list-style: none; }

.capability-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  color: var(--gray-300);
  font-size: 0.95rem;
  line-height: 1.6;
}

.capability-list .diamond {
  margin-top: 7px;
}

/* ============================================================
   PLATFORM / SERVICES FEATURE SECTION
   ============================================================ */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  margin-bottom: var(--space-4xl);
}

.feature-row:nth-child(even) { direction: rtl; }
.feature-row:nth-child(even) > * { direction: ltr; }

@media (max-width: 768px) {
  .feature-row,
  .feature-row:nth-child(even) {
    grid-template-columns: 1fr;
    direction: ltr;
  }
}

.feature-visual {
  background: var(--black-card);
  border: 1px solid rgba(201, 168, 76, 0.1);
  padding: var(--space-2xl);
  position: relative;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.feature-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(201, 168, 76, 0.05);
  margin: 12px;
  pointer-events: none;
}

.feature-content h3 {
  color: var(--white);
  margin-bottom: var(--space-md);
}

.feature-content p {
  color: var(--gray-400);
  margin-bottom: var(--space-lg);
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.feature-tag {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gold);
  padding: 0.35rem 0.8rem;
  border: 1px solid rgba(201, 168, 76, 0.2);
  background: rgba(201, 168, 76, 0.05);
}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

.contact-info-block {
  margin-bottom: var(--space-2xl);
}

.contact-info-block h4 {
  font-size: 0.72rem;
  color: var(--gold);
  margin-bottom: var(--space-sm);
}

.contact-info-block p,
.contact-info-block a {
  color: var(--gray-300);
  font-size: 0.95rem;
  line-height: 1.7;
}

.contact-info-block a:hover { color: var(--gold); }

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--white);
  background: var(--black-card);
  border: 1px solid rgba(201, 168, 76, 0.15);
  outline: none;
  transition: border-color var(--duration-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--gold);
}

.form-group textarea { resize: vertical; min-height: 140px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--black);
  border-top: 1px solid rgba(201, 168, 76, 0.1);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand p {
  color: var(--gray-500);
  font-size: 0.88rem;
  margin-top: var(--space-md);
  max-width: 360px;
}

.footer-links h4 {
  color: var(--gold);
  font-size: 0.72rem;
  margin-bottom: var(--space-lg);
}

.footer-links ul { list-style: none; }

.footer-links li { margin-bottom: var(--space-sm); }

.footer-links a {
  font-size: 0.88rem;
  color: var(--gray-400);
  transition: color var(--duration-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(201, 168, 76, 0.08);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom p {
  font-size: 0.78rem;
  color: var(--gray-500);
}

.footer-reg {
  display: flex;
  gap: var(--space-lg);
  font-size: 0.72rem;
  color: var(--gray-500);
  letter-spacing: 0.05em;
}

.footer-reg span { color: var(--gold); font-weight: 600; }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 600px) {
  .container { padding: 0 var(--space-md); }
  .section { padding: var(--space-3xl) 0; }
  .hero { min-height: auto; padding-top: 100px; padding-bottom: var(--space-3xl); }
  .stats-bar { grid-template-columns: 1fr 1fr; }
}