/* === SINO OCEAN TECHNOLOGIES — SHARED STYLESHEET === */
/* Design System: Deep Navy + Warm Gold + Clean White */
/* Absolute hex colors only — no rgba anywhere */

:root {
  --clr-navy-deep: #0a1628;
  --clr-navy-mid: #132442;
  --clr-navy-light: #1e3a5f;
  --clr-gold: #c8963e;
  --clr-gold-hover: #d4a853;
  --clr-gold-light: #f0d78c;
  --clr-white: #ffffff;
  --clr-off-white: #f4f6f9;
  --clr-gray-light: #e8ecf1;
  --clr-gray-mid: #8892a4;
  --clr-gray-dark: #4a5568;
  --clr-text-dark: #1a1a2e;
  --clr-text-body: #2d3748;
  --clr-gradient-start: #0a1628;
  --clr-gradient-end: #1e3a5f;
  --clr-success: #2f855a;
  --clr-error: #c53030;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', 'Consolas', monospace;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 8px #0000001a;
  --shadow-md: 0 4px 20px #0000001f;
  --shadow-lg: 0 8px 40px #0000002e;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

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

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  color: var(--clr-text-dark);
  font-weight: 700;
  line-height: 1.3;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

p { margin-bottom: 1rem; }

a {
  color: var(--clr-gold);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--clr-gold-hover); }

ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.4rem; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* === NAVIGATION === */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--clr-navy-deep);
  box-shadow: 0 2px 16px #00000033;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: 0.02em;
}
.nav-brand svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  padding: 0;
  margin: 0;
}
.nav-links a {
  color: var(--clr-gray-light);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--clr-gold);
  transition: width var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--clr-gold);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--clr-white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--clr-navy-deep);
  flex-direction: column;
  padding: 2rem 1.5rem;
  gap: 1.5rem;
  z-index: 999;
  overflow-y: auto;
}
.nav-mobile.open {
  display: flex;
}
.nav-mobile a {
  color: var(--clr-white);
  font-size: 1.2rem;
  font-weight: 500;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--clr-navy-light);
}

/* === HERO === */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--clr-gradient-start) 0%, var(--clr-gradient-end) 50%, var(--clr-navy-deep) 100%);
  color: var(--clr-white);
  padding: 120px 0 100px;
  overflow: hidden;
  text-align: center;
}

/* Visual effect: floating geometric shapes */
.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -120px;
  width: 500px;
  height: 500px;
  border: 2px solid var(--clr-gold);
  opacity: 0.15;
  border-radius: 50%;
  animation: heroFloat 8s ease-in-out infinite;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -80px;
  width: 400px;
  height: 400px;
  border: 2px solid var(--clr-gold-light);
  opacity: 0.1;
  border-radius: 40% 60% 30% 70%;
  animation: heroFloat 10s ease-in-out infinite reverse;
}
@keyframes heroFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(5deg); }
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--clr-white);
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.hero-title span {
  color: var(--clr-gold);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--clr-gray-mid);
  max-width: 700px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
  letter-spacing: 0.02em;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--clr-gold);
  color: var(--clr-navy-deep);
}
.btn-primary:hover {
  background: var(--clr-gold-hover);
  color: var(--clr-navy-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--clr-white);
  border: 2px solid var(--clr-gold);
}
.btn-outline:hover {
  background: var(--clr-gold);
  color: var(--clr-navy-deep);
  transform: translateY(-2px);
}

/* === SECTIONS === */
.section {
  padding: 90px 0;
}

.section-alt {
  background: var(--clr-off-white);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--clr-gold);
  margin-bottom: 0.8rem;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--clr-text-dark);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--clr-gray-dark);
  max-width: 600px;
  margin: 0 auto;
}

/* === SERVICES GRID === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-card {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--clr-gray-light);
  text-align: center;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-gold);
}

.service-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  background: var(--clr-navy-deep);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.service-icon svg {
  width: 36px;
  height: 36px;
  fill: var(--clr-gold);
}

.service-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  color: var(--clr-text-dark);
}

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

/* === ABOUT === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-visual {
  position: relative;
  background: linear-gradient(135deg, var(--clr-navy-mid), var(--clr-navy-light));
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-visual-inner {
  color: var(--clr-white);
}
.about-visual-number {
  font-size: 5rem;
  font-weight: 800;
  color: var(--clr-gold);
  line-height: 1;
}
.about-visual-label {
  font-size: 1.1rem;
  color: var(--clr-gray-light);
  margin-top: 0.5rem;
}

.about-text h2 {
  margin-bottom: 1.2rem;
}
.about-text p {
  color: var(--clr-gray-dark);
  margin-bottom: 1.2rem;
}

/* === STATS COUNTERS === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat-item {
  text-align: center;
  padding: 2rem 1rem;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--clr-gold);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-text-dark);
}

/* === PROCESS STEPS === */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step-number {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.2rem;
  background: var(--clr-navy-deep);
  color: var(--clr-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  position: relative;
  z-index: 2;
}

.process-step h4 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--clr-gray-dark);
}

/* Connector line between steps */
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: var(--clr-gray-light);
  z-index: 1;
}

/* === TESTIMONIALS === */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.testimonial-card {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--clr-gray-light);
  position: relative;
}

.testimonial-card::before {
  content: '\201C';
  font-size: 5rem;
  color: var(--clr-gold);
  opacity: 0.3;
  position: absolute;
  top: 0.5rem;
  left: 1.5rem;
  line-height: 1;
  font-family: Georgia, serif;
}

.testimonial-text {
  font-style: italic;
  color: var(--clr-gray-dark);
  margin-bottom: 1.5rem;
  padding-top: 1rem;
}

.testimonial-author {
  font-weight: 700;
  color: var(--clr-text-dark);
}

.testimonial-role {
  font-size: 0.85rem;
  color: var(--clr-gray-mid);
}

/* === CONTACT FORM === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info h2 {
  margin-bottom: 1.2rem;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  background: var(--clr-navy-deep);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-info-icon svg {
  width: 22px;
  height: 22px;
  fill: var(--clr-gold);
}

.contact-info-item h4 {
  margin-bottom: 0.2rem;
  font-size: 1.05rem;
}
.contact-info-item p {
  color: var(--clr-gray-dark);
  margin: 0;
}

.contact-form-wrapper {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-gray-light);
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--clr-text-dark);
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--clr-gray-light);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--clr-text-dark);
  background: var(--clr-white);
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--clr-gold);
}

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

.form-status {
  margin-top: 1rem;
  padding: 0.8rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
  display: none;
}
.form-status.success {
  display: block;
  background: #c6f6d5;
  color: var(--clr-success);
  border: 1px solid var(--clr-success);
}
.form-status.error {
  display: block;
  background: #fed7d7;
  color: var(--clr-error);
  border: 1px solid var(--clr-error);
}

/* === CTA BANNER === */
.cta-banner {
  background: linear-gradient(135deg, var(--clr-gradient-start), var(--clr-gradient-end));
  color: var(--clr-white);
  text-align: center;
  padding: 80px 0;
}

.cta-banner h2 {
  color: var(--clr-white);
  font-size: 2.4rem;
  margin-bottom: 1rem;
}

.cta-banner p {
  color: var(--clr-gray-mid);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* === FOOTER === */
.site-footer {
  background: var(--clr-navy-deep);
  color: var(--clr-gray-mid);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--clr-white);
  font-size: 1.1rem;
  margin-bottom: 1.2rem;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 0.6rem;
}
.footer-links a {
  color: var(--clr-gray-mid);
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--clr-gold);
}

.footer-bottom {
  border-top: 1px solid var(--clr-navy-light);
  padding-top: 25px;
  text-align: center;
  font-size: 0.85rem;
}

/* === PAGE HEADER (for privacy/terms) === */
.page-header {
  background: linear-gradient(135deg, var(--clr-gradient-start), var(--clr-gradient-end));
  color: var(--clr-white);
  padding: 80px 0 60px;
  text-align: center;
}

.page-header h1 {
  color: var(--clr-white);
  font-size: 2.6rem;
}

.page-header p {
  color: var(--clr-gray-mid);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0.8rem auto 0;
}

/* === LEGAL CONTENT (privacy & terms) === */
.legal-content {
  padding: 70px 0;
  background: var(--clr-white);
}

.legal-content .container {
  max-width: 860px;
}

.legal-content h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--clr-text-dark);
  padding-top: 1rem;
  border-top: 1px solid var(--clr-gray-light);
}

.legal-content h2:first-of-type {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

.legal-content p {
  color: var(--clr-gray-dark);
  line-height: 1.8;
  margin-bottom: 1.2rem;
}

.legal-content ul, .legal-content ol {
  color: var(--clr-gray-dark);
  line-height: 1.8;
}

.legal-content .last-updated {
  font-size: 0.9rem;
  color: var(--clr-gray-mid);
  margin-bottom: 2rem;
  font-style: italic;
}

/* === ANIMATIONS === */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .process-steps::before { display: none; }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }

  .hero-title { font-size: 2.4rem; }
  .hero { padding: 90px 0 70px; }

  .nav-links { display: none; }
  .hamburger { display: flex; }

  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }

  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }

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

@media (max-width: 480px) {
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; }
  .stat-number { font-size: 2.2rem; }
  .contact-form-wrapper { padding: 1.5rem; }
}