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

:root {
  --gold: #E8A817;
  --gold-light: #F5C842;
  --gold-dark: #C48D0F;
  --dark: #1A1A1A;
  --dark-2: #232323;
  --dark-3: #2C2C2C;
  --gray-900: #1E1E1E;
  --gray-800: #2D2D2D;
  --gray-700: #404040;
  --gray-400: #9CA3AF;
  --gray-300: #D1D5DB;
  --gray-100: #F3F4F6;
  --white: #FFFFFF;
  --warm-bg: #FDF8EF;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Playfair Display', Georgia, serif;
}

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

body {
  font-family: var(--font-body);
  color: var(--dark);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.2; }

.text-gold { color: var(--gold); }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 2px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--gold);
  color: var(--dark);
  border-color: var(--gold);
}
.btn-primary:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(232, 168, 23, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.35);
}
.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.08);
}

.btn-sm {
  padding: 10px 22px;
  font-size: 0.875rem;
  border-radius: 6px;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.3s ease;
  background: transparent;
}

.nav.scrolled {
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0,0,0,0.2);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }

.nav-links .btn {
  color: var(--dark);
  background: var(--gold);
  border-color: var(--gold);
}
.nav-links .btn:hover {
  background: var(--gold-light);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1A1A1A 0%, #2D2D2D 50%, #1A1A1A 100%);
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 70%;
  height: 70%;
  background: radial-gradient(circle, rgba(232, 168, 23, 0.12) 0%, transparent 65%);
  border-radius: 50%;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 50%;
  height: 50%;
  background: radial-gradient(circle, rgba(232, 168, 23, 0.06) 0%, transparent 65%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 140px 24px 100px;
  max-width: 800px;
}

.hero-tag {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--gold);
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  color: var(--white);
  margin-bottom: 24px;
  font-weight: 700;
}

.hero-sub {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.7);
  max-width: 620px;
  margin-bottom: 40px;
  line-height: 1.8;
}

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

/* === Sections === */
.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--dark);
  color: var(--white);
}

.section-warm {
  background: var(--warm-bg);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--gold);
  margin-bottom: 16px;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
  opacity: 0.75;
  line-height: 1.8;
}

/* === About === */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text p {
  margin-bottom: 20px;
  color: var(--gray-700);
  font-size: 1.02rem;
}

.highlight-card {
  background: var(--warm-bg);
  border-radius: 16px;
  padding: 40px;
  border-left: 4px solid var(--gold);
}

.highlight-card svg {
  margin-bottom: 20px;
}

.highlight-card p {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--dark);
  line-height: 1.7;
}

/* === Services === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--dark-2);
  border-radius: 16px;
  padding: 36px 32px;
  transition: all 0.3s ease;
  border: 1px solid rgba(255,255,255,0.06);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(232, 168, 23, 0.25);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: rgba(232, 168, 23, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--gold);
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
}

/* === Clients === */
.clients-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}

.client-tag {
  padding: 12px 28px;
  background: var(--warm-bg);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--dark);
  border: 1px solid rgba(232, 168, 23, 0.2);
  transition: all 0.2s;
}
.client-tag:hover {
  border-color: var(--gold);
  background: rgba(232, 168, 23, 0.08);
}

.clients-note {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}
.clients-note p {
  color: var(--gray-700);
  font-size: 1.02rem;
  line-height: 1.8;
}

/* === Why Helios === */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.why-card {
  padding: 36px;
  border-radius: 16px;
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.06);
  transition: all 0.3s;
}
.why-card:hover {
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.why-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.why-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.why-card p {
  color: var(--gray-700);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* === CTA / Contact === */
.section-cta {
  background: var(--dark);
  color: var(--white);
  padding: 100px 0 80px;
}

.cta-content {
  text-align: center;
}

.cta-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 20px;
}

.cta-content > p {
  max-width: 640px;
  margin: 0 auto 48px;
  opacity: 0.7;
  font-size: 1.05rem;
  line-height: 1.8;
}

.cta-form-wrap {
  max-width: 640px;
  margin: 0 auto;
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cta-form input,
.cta-form textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--dark-2);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}
.cta-form input::placeholder,
.cta-form textarea::placeholder {
  color: rgba(255,255,255,0.35);
}
.cta-form input:focus,
.cta-form textarea:focus {
  outline: none;
  border-color: var(--gold);
}

.cta-form textarea {
  resize: vertical;
  min-height: 100px;
}

.cta-form .btn {
  align-self: center;
  margin-top: 8px;
}

/* === Footer === */
.footer {
  background: var(--gray-900);
  color: rgba(255,255,255,0.6);
  padding: 60px 0 40px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
}

.footer-brand p {
  margin-top: 12px;
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-links h4 {
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--gold); }

.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
}

/* === Animations === */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--dark);
    flex-direction: column;
    padding: 80px 32px 32px;
    gap: 20px;
    transition: right 0.3s ease;
    box-shadow: -4px 0 20px rgba(0,0,0,0.3);
  }
  .nav-links.open { right: 0; }
  .nav-toggle { display: flex; }

  .hero-content { padding: 120px 24px 80px; }
  .hero h1 { font-size: 2.2rem; }

  .section { padding: 72px 0; }
  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }

  .footer-links { flex-direction: column; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}