/* 
  PT Optima Sarana Instrumen (PT OSI) - Modern Enterprise Design System
  Theme: Industrial Cyber Tech / Dark Mode Glassmorphism
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Color Palette */
  --bg-primary: #07090e;
  --bg-secondary: #0d111a;
  --bg-tertiary: #131926;
  --bg-surface: rgba(18, 25, 38, 0.75);
  --bg-surface-hover: rgba(28, 38, 57, 0.85);
  --bg-card: rgba(15, 22, 34, 0.8);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.3);
  
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-indigo: #6366f1;
  --accent-teal: #14b8a6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  /* Gradients */
  --grad-cyan-blue: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --grad-primary: linear-gradient(135deg, #00f2fe 0%, #6366f1 100%);
  --grad-dark: linear-gradient(180deg, rgba(7, 9, 14, 0) 0%, rgba(7, 9, 14, 0.95) 100%);
  --grad-card: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
  
  /* Shadows & Glows */
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  --glow-cyan: 0 0 25px rgba(0, 242, 254, 0.25);
  --glow-blue: 0 0 25px rgba(79, 172, 254, 0.25);
  
  /* Layout Constants */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --header-height: 80px;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.25;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 3.5vw, 3rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.4rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.25rem; }

p { color: var(--text-muted); margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition-fast);
}
a:hover { color: #ffffff; }

ul { list-style: none; }

/* Utility Classes */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-gradient {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-cyan { color: var(--accent-cyan); }
.text-muted { color: var(--text-muted); }

.bg-glass {
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.25);
}

.badge-pulse::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-ring 1.8s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.7; }
  100% { transform: scale(0.95); opacity: 1; }
}

/* Custom Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--grad-primary);
  color: #050b14;
  font-weight: 700;
  box-shadow: var(--glow-cyan);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.45);
  color: #000;
}

.btn-outline {
  background: transparent;
  color: #ffffff;
  border: 1px solid var(--border-color);
}
.btn-outline:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.08);
  color: var(--accent-cyan);
}

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 50%;
}

/* Background Effects */
.cyber-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 242, 254, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(99, 102, 241, 0.06) 0%, transparent 40%),
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 60px 60px, 60px 60px;
}

/* Navigation Header */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(7, 9, 14, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
}

.nav-logo {
  height: 48px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(0,242,254,0.3));
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-cyan);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  opacity: 0;
  visibility: hidden;
  min-width: 240px;
  padding: 0.8rem 0;
  background: rgba(13, 17, 26, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-fast);
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.dropdown-item:hover {
  background: rgba(0, 242, 254, 0.08);
  color: var(--accent-cyan);
  padding-left: 1.5rem;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: 5rem;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  z-index: 2;
}

.hero-title {
  margin: 1.2rem 0 1.5rem;
  font-size: clamp(2.6rem, 4.5vw, 4rem);
  line-height: 1.15;
}

.hero-description {
  font-size: 1.15rem;
  color: #a3aed0;
  margin-bottom: 2.5rem;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.visual-card {
  position: relative;
  width: 100%;
  max-width: 480px;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.01) 100%);
  border: 1px solid rgba(0, 242, 254, 0.2);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), var(--glow-cyan);
  overflow: hidden;
}

.visual-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-color);
}

.visual-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.meta-box {
  padding: 0.85rem;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
}

.meta-box span {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

.meta-box strong {
  font-size: 1rem;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

/* Stats Section */
.stats-bar {
  margin-top: -3rem;
  position: relative;
  z-index: 10;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: rgba(13, 17, 26, 0.85);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -0.75rem;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border-color);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Section Header */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 4rem;
}

.section-title {
  margin: 0.8rem 0 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* Products Showcase Section */
.product-tabs {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.7rem 1.4rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.tab-btn:hover, .tab-btn.active {
  background: var(--grad-primary);
  color: #050b14;
  border-color: transparent;
  box-shadow: var(--glow-cyan);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.product-card {
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), var(--glow-cyan);
}

.product-img-wrapper {
  position: relative;
  height: 220px;
  width: 100%;
  overflow: hidden;
  background: #0a0d14;
}

.product-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-img-wrapper img {
  transform: scale(1.06);
}

.product-category-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-sm);
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(8px);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
  border: 1px solid rgba(0,242,254,0.3);
}

.product-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-title {
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
  color: #fff;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

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

.service-card {
  padding: 2.2rem;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--grad-primary);
  opacity: 0;
  transition: var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 242, 254, 0.3);
}

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

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: 0.8rem;
}

.service-list {
  margin-top: 1rem;
}

.service-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.service-list li i {
  color: var(--accent-cyan);
  margin-top: 0.25rem;
}

/* Company Profile & Vision */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.vision-box {
  padding: 2rem;
  border-radius: var(--radius-md);
  background: rgba(13, 17, 26, 0.7);
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  position: relative;
}

.vision-box h4 {
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

/* Certificates / Legality Section */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.cert-card {
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.cert-card:hover {
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
  transform: scale(1.02);
}

.cert-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 0.8rem;
}

.cert-card h4 {
  font-size: 0.95rem;
  color: var(--text-main);
}

/* Modal Popup */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(5, 7, 12, 0.85);
  backdrop-filter: blur(16px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  box-shadow: 0 25px 60px rgba(0,0,0,0.8), var(--glow-cyan);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border-color: #ef4444;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  padding: 1.2rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}

.info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-form {
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 1.4rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-sm);
  background: rgba(7, 9, 14, 0.7);
  border: 1px solid var(--border-color);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
}

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

/* Map Frame */
.map-container {
  width: 100%;
  height: 320px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-top: 1.5rem;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
  filter: invert(90%) hue-rotate(180deg) contrast(1.2);
}

/* Footer */
.footer {
  background: #04060a;
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin: 1rem 0;
  font-size: 0.9rem;
}

.footer-title {
  font-size: 1.1rem;
  margin-bottom: 1.2rem;
  color: #fff;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-cyan);
  padding-left: 0.3rem;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-description { margin: 0 auto 2.5rem; }
  .hero-actions { justify-content: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
  .stat-item:nth-child(2)::after { display: none; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    right: -100%;
    width: 280px;
    height: calc(100vh - var(--header-height));
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    gap: 1.5rem;
    transition: var(--transition-normal);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: transparent;
    border: none;
    box-shadow: none;
    padding-left: 1rem;
  }
  
  .mobile-toggle { display: block; }
  .services-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item::after { display: none !important; }
}