/* =======================================================
   BrightSun Network Technology - Warm Sunset/Copper Theme
   Colors: #120d08 (deep charcoal), #e07c3c (copper/amber)
   ======================================================= */

:root {
  --bg-deep: #120d08;
  --bg-primary: #1a130e;
  --bg-secondary: #241c15;
  --bg-card: #2c221a;
  --text-primary: #fdf6f0;
  --text-secondary: #b8957a;
  --accent: #e07c3c;
  --accent-light: #f0a56a;
  --border-color: rgba(224, 124, 60, 0.2);
  --font-sans: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --max-width: 1200px;
  --nav-height: 70px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-primary);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

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

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(18, 13, 8, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background 0.3s ease;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.logo-icon {
  color: var(--accent);
  font-size: 1.8rem;
  line-height: 1;
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

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

/* Mobile Nav */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--nav-height) 24px 60px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(224, 124, 60, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(240, 165, 106, 0.05) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-title .accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-subtitle strong {
  color: var(--accent);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #c96a2e);
  color: #120d08;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(224, 124, 60, 0.35);
  color: #120d08;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #120d08;
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg);
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.6; }
  50% { transform: rotate(45deg) translate(4px, 4px); opacity: 1; }
}

/* ===== Page Hero ===== */
.page-hero {
  padding: calc(var(--nav-height) + 60px) 24px 60px;
  text-align: center;
  background: linear-gradient(180deg, rgba(224, 124, 60, 0.06) 0%, transparent 100%);
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.page-hero-sm {
  padding: calc(var(--nav-height) + 40px) 24px 40px;
}

/* ===== Section Common ===== */
.section {
  padding: 80px 0;
}

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

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(224, 124, 60, 0.1);
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px 28px;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(224, 124, 60, 0.4);
  box-shadow: 0 12px 40px rgba(224, 124, 60, 0.1);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(224, 124, 60, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
}

.feature-icon svg {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== Stats ===== */
.stats {
  background: var(--bg-secondary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

/* ===== Approach Steps ===== */
.approach-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px 28px;
  position: relative;
  transition: all 0.4s ease;
}

.step:hover {
  transform: translateY(-4px);
  border-color: rgba(224, 124, 60, 0.3);
}

.step-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(224, 124, 60, 0.15);
  margin-bottom: 16px;
  line-height: 1;
}

.step h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta {
  text-align: center;
  background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary), var(--bg-primary));
}

.cta h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.cta p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

/* ===== Services Detail ===== */
.service-block {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px;
  transition: all 0.4s ease;
}

.service-block:hover {
  border-color: rgba(224, 124, 60, 0.3);
  box-shadow: 0 8px 32px rgba(224, 124, 60, 0.08);
}

.service-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: rgba(224, 124, 60, 0.12);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.service-icon svg {
  width: 28px;
  height: 28px;
}

.service-content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.service-content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.service-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
  list-style: none;
}

.service-list li {
  color: var(--text-primary);
  font-size: 0.9rem;
  padding-left: 20px;
  position: relative;
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* ===== About Page ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.about-text .section-tag {
  margin-bottom: 12px;
}

.about-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  transition: all 0.3s ease;
}

.value-card:hover {
  border-color: rgba(224, 124, 60, 0.3);
}

.value-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--accent);
}

.value-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ===== Team ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px 28px;
  text-align: center;
  transition: all 0.4s ease;
}

.team-card:hover {
  border-color: rgba(224, 124, 60, 0.3);
  transform: translateY(-4px);
}

.team-avatar svg {
  width: 80px;
  height: 80px;
  margin-bottom: 16px;
}

.team-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.team-role {
  display: block;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.team-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== Contact Page ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact-info > p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.contact-detail {
  margin-bottom: 24px;
}

.contact-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.contact-detail p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.contact-detail a {
  color: var(--text-primary);
}

.contact-detail a:hover {
  color: var(--accent);
}

/* ===== Form ===== */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: all 0.3s ease;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(224, 124, 60, 0.15);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23b8957a' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== Legal Content ===== */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.content-block {
  margin-bottom: 36px;
}

.content-block h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--accent);
}

.content-block p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.8;
}

.content-block ul {
  list-style: none;
  margin: 12px 0;
}

.content-block ul li {
  color: var(--text-secondary);
  padding: 6px 0 6px 20px;
  position: relative;
  line-height: 1.7;
}

.content-block ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.6;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: 700;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

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

.footer-contact p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 6px;
  line-height: 1.6;
}

.footer-contact a {
  color: var(--text-secondary);
}

.footer-contact a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===== Animations ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(18, 13, 8, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    padding: 24px;
    gap: 20px;
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .service-block {
    flex-direction: column;
    padding: 28px;
  }
  .service-list {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section {
    padding: 60px 0;
  }
  .hero-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  .approach-steps {
    grid-template-columns: 1fr;
  }
  .team-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
}