/* ==========================================================================
   GENERAL MACHMUDY TECHNINDO (GMT) - INDUSTRIAL EPC DESIGN SYSTEM
   ========================================================================== */

:root {
  /* Core Industrial Palette */
  --gmt-navy-900: #070e1c;
  --gmt-navy-800: #0b1528;
  --gmt-navy-700: #10213d;
  --gmt-navy-600: #162d53;
  --gmt-navy-500: #1e3a6a;
  
  /* High-Vis Safety Accent */
  --gmt-orange-500: #ff5e00;
  --gmt-orange-600: #e65400;
  --gmt-orange-700: #cc4900;
  --gmt-orange-light: #fff3ec;
  --gmt-orange-glow: rgba(255, 94, 0, 0.25);
  
  /* Neutrals & Surfaces */
  --gmt-steel-900: #0f172a;
  --gmt-steel-700: #334155;
  --gmt-steel-500: #64748b;
  --gmt-steel-400: #94a3b8;
  --gmt-steel-200: #e2e8f0;
  --gmt-steel-100: #f1f5f9;
  --gmt-steel-50:  #f8fafc;
  --gmt-white:     #ffffff;
  
  /* Status */
  --gmt-success:   #10b981;
  --gmt-warning:   #f59e0b;
  
  /* Shadows */
  --gmt-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --gmt-shadow-md: 0 4px 6px -1px rgba(11, 21, 40, 0.1), 0 2px 4px -2px rgba(11, 21, 40, 0.1);
  --gmt-shadow-lg: 0 10px 15px -3px rgba(11, 21, 40, 0.12), 0 4px 6px -4px rgba(11, 21, 40, 0.1);
  --gmt-shadow-xl: 0 20px 25px -5px rgba(11, 21, 40, 0.18), 0 8px 10px -6px rgba(11, 21, 40, 0.12);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Base Reset & Core Standards */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  color: var(--gmt-steel-900);
  background-color: var(--gmt-steel-50);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Accessibility Focus Ring (WCAG AA Compliance) */
:focus-visible {
  outline: 3px solid var(--gmt-orange-500) !important;
  outline-offset: 3px !important;
}

/* Industrial Utility Header & Badges */
.gmt-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 4px;
}

.gmt-tag-orange {
  background-color: var(--gmt-orange-light);
  color: var(--gmt-orange-700);
  border: 1px solid rgba(255, 94, 0, 0.2);
}

.gmt-tag-navy {
  background-color: rgba(16, 33, 61, 0.08);
  color: var(--gmt-navy-700);
  border: 1px solid rgba(16, 33, 61, 0.15);
}

.gmt-tag-dark {
  background-color: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
}

/* Solid Industrial Buttons */
.gmt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  min-width: 48px;
  padding: 0.75rem 1.6rem;
  font-size: 0.925rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

.gmt-btn-primary {
  background-color: var(--gmt-orange-500);
  color: #ffffff;
  border-color: var(--gmt-orange-600);
  box-shadow: 0 4px 12px var(--gmt-orange-glow);
}

.gmt-btn-primary:hover {
  background-color: var(--gmt-orange-600);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--gmt-orange-glow);
  color: #ffffff;
}

.gmt-btn-primary:active {
  transform: translateY(0);
}

.gmt-btn-secondary {
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
}

.gmt-btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
  color: #ffffff;
}

.gmt-btn-outline {
  background-color: transparent;
  color: var(--gmt-navy-700);
  border: 2px solid var(--gmt-navy-700);
}

.gmt-btn-outline:hover {
  background-color: var(--gmt-navy-700);
  color: #ffffff;
}

/* Industrial Card Structure */
.gmt-card {
  background-color: var(--gmt-white);
  border: 1px solid var(--gmt-steel-200);
  border-radius: 10px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.gmt-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--gmt-shadow-lg);
  border-color: rgba(255, 94, 0, 0.3);
}

/* Service Card Industrial Accent */
.gmt-service-card {
  position: relative;
  background-color: var(--gmt-white);
  border: 1px solid var(--gmt-steel-200);
  border-radius: 8px;
  padding: 2rem;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.gmt-service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background-color: var(--gmt-orange-500);
  transition: height 0.3s ease;
}

.gmt-service-card:hover {
  transform: translateY(-4px);
  border-color: #cbd5e1;
  box-shadow: var(--gmt-shadow-lg);
}

.gmt-service-card:hover::before {
  height: 100%;
}

.gmt-service-icon {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background-color: var(--gmt-steel-100);
  color: var(--gmt-navy-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  transition: all 0.25s ease;
}

.gmt-service-card:hover .gmt-service-icon {
  background-color: var(--gmt-orange-500);
  color: #ffffff;
}

/* Modal Styling */
.gmt-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background-color: rgba(7, 14, 28, 0.82);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

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

.gmt-modal-dialog {
  background: #ffffff;
  border-radius: 12px;
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
  transform: scale(0.96);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.gmt-modal.active .gmt-modal-dialog {
  transform: scale(1);
}

/* Toast Notification */
.gmt-toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  background-color: var(--gmt-navy-800);
  color: #ffffff;
  box-shadow: var(--gmt-shadow-xl);
  border-left: 4px solid var(--gmt-orange-500);
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.gmt-toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
  background: #94a3b8;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #64748b;
}