/* === YTR Connect — Professional Design System === */

:root {
  --color-primary: #0B1622;
  --color-secondary: #1B3148;
  --color-accent-gold: #C8963E;
  --color-accent-blue: #3182CE;
  --color-bg-page: #F2F4F7;
  --color-bg-white: #FFFFFF;
  --color-text: #1A1D23;
  --color-text-secondary: #4A4E58;
  --color-text-on-dark: #DFE2E8;
  --color-border: #D5D9E0;
  --color-border-light: #E8EBF0;
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', monospace;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 14px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent-blue);
  text-decoration: none;
  transition: color 200ms ease;
}

a:hover {
  color: var(--color-accent-gold);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-primary);
}

h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.35rem; }

p {
  margin-bottom: 1.1rem;
}

ul, ol {
  padding-left: 1.6rem;
  margin-bottom: 1.2rem;
}

li {
  margin-bottom: 0.45rem;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: #EEF0F4;
  padding: 2px 7px;
  border-radius: 4px;
  color: var(--color-secondary);
}

hr {
  border: none;
  border-top: 2px solid var(--color-border-light);
  margin: 2.5rem 0;
}

/* ---- Container ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 820px;
}

/* ---- Navigation ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-primary);
  border-bottom: 2px solid var(--color-secondary);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-on-dark);
  letter-spacing: -0.01em;
}

.navbar__brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent-gold), #E0A84C);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.navbar__links {
  display: flex;
  list-style: none;
  gap: 6px;
  padding: 0;
  margin: 0;
}

.navbar__links a {
  display: block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--color-text-on-dark);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 200ms ease, color 200ms ease;
}

.navbar__links a:hover,
.navbar__links a.active {
  background: var(--color-secondary);
  color: #FFFFFF;
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.navbar__toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--color-text-on-dark);
  border-radius: 2px;
  transition: transform 250ms ease, opacity 250ms ease;
}

.navbar__toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.navbar__toggle.active span:nth-child(2) {
  opacity: 0;
}
.navbar__toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ---- Hero ---- */
.hero {
  background: linear-gradient(170deg, var(--color-primary) 0%, var(--color-secondary) 60%, #24455F 100%);
  color: var(--color-text-on-dark);
  padding: 100px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -15%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200,150,62,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(49,130,206,0.10) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero__title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: #FFFFFF;
  margin-bottom: 20px;
}

.hero__title span {
  color: var(--color-accent-gold);
}

.hero__subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: #BCC3CE;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 200ms ease;
  text-align: center;
  font-family: inherit;
}

.btn--primary {
  background: var(--color-accent-gold);
  color: var(--color-primary);
  border-color: var(--color-accent-gold);
}

.btn--primary:hover {
  background: #D4A54E;
  border-color: #D4A54E;
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(200,150,62,0.35);
}

.btn--outline {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255,255,255,0.35);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.6);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent-blue);
  border-color: transparent;
  padding-left: 0;
}

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

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}

.hero__card-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: #E2E6ED;
  font-weight: 500;
}

.hero__card-item:last-child {
  border-bottom: none;
}

.hero__card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.hero__card-icon--blue  { background: rgba(49,130,206,0.25); }
.hero__card-icon--gold  { background: rgba(200,150,62,0.25); }
.hero__card-icon--green { background: rgba(5,150,105,0.25); }

/* ---- Section ---- */
.section {
  padding: 88px 0;
}

.section--alt {
  background: var(--color-bg-page);
}

.section--dark {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
}

.section__header {
  text-align: center;
  margin-bottom: 56px;
}

.section__label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-gold);
  margin-bottom: 10px;
}

.section__title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section--dark .section__title {
  color: #FFFFFF;
}

.section__desc {
  font-size: 1.08rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.section--dark .section__desc {
  color: #AEB6C2;
}

/* ---- Services Grid ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-gold);
}

.service-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: #EFF6FF;
  color: var(--color-accent-blue);
}

.service-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.service-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ---- Features ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px 60px;
}

.feature-item {
  display: flex;
  gap: 18px;
}

.feature-item__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(200,150,62,0.18), rgba(200,150,62,0.06));
}

.feature-item__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.feature-item__text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---- Stats ---- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--color-secondary);
  border-radius: var(--radius-lg);
}

.stat-card__number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--color-accent-gold);
  letter-spacing: -0.02em;
}

.stat-card__label {
  font-size: 0.92rem;
  color: var(--color-text-on-dark);
  margin-top: 6px;
}

/* ---- Industries ---- */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.industry-tag {
  display: block;
  padding: 14px 16px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius);
  text-align: center;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.industry-tag:hover {
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
}

/* ---- CTA Section ---- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-secondary), #24455F);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
}

.cta-banner__title {
  font-size: 2rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 14px;
}

.cta-banner__text {
  font-size: 1.05rem;
  color: #C5CDD8;
  margin-bottom: 30px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Footer ---- */
.footer {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  padding: 64px 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer__brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #FFFFFF;
}

.footer__brand-desc {
  font-size: 0.9rem;
  color: #A0AAB6;
  line-height: 1.65;
  margin-bottom: 16px;
}

.footer__heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-gold);
  margin-bottom: 18px;
}

.footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__links li {
  margin-bottom: 10px;
}

.footer__links a {
  color: #A0AAB6;
  font-size: 0.92rem;
  transition: color 200ms ease;
}

.footer__links a:hover {
  color: var(--color-accent-gold);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #788290;
}

.footer__bottom-links {
  display: flex;
  gap: 24px;
}

.footer__bottom-links a {
  color: #788290;
}

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

/* ---- Legal Pages (Privacy & Terms) ---- */
.legal-hero {
  background: linear-gradient(170deg, var(--color-primary), var(--color-secondary));
  color: #FFFFFF;
  padding: 64px 0;
  text-align: center;
}

.legal-hero__title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 10px;
}

.legal-hero__subtitle {
  font-size: 1rem;
  color: #AEB6C2;
}

.legal-content {
  background: var(--color-bg-white);
  padding: 64px 0;
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 44px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border-light);
}

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

.legal-content p {
  line-height: 1.75;
  color: var(--color-text);
}

.legal-content ul {
  margin-bottom: 1.4rem;
}

.legal-content li {
  margin-bottom: 8px;
  line-height: 1.65;
}

.legal-content strong {
  color: var(--color-primary);
}

/* ---- Back to Top ---- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent-gold);
  color: var(--color-primary);
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 250ms ease;
  z-index: 999;
  box-shadow: var(--shadow-md);
}

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

.back-to-top:hover {
  background: #D4A54E;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.65rem; }

  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__title { font-size: 2.4rem; }
  .hero__subtitle { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .hero__visual { display: none; }

  .navbar__links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-primary);
    flex-direction: column;
    padding: 12px 24px;
    border-top: 1px solid var(--color-secondary);
  }

  .navbar__links.open {
    display: flex;
  }

  .navbar__toggle {
    display: flex;
  }

  .services-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .cta-banner {
    padding: 40px 24px;
  }
}

@media (max-width: 480px) {
  .industries-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; align-items: center; }
}