/* ==========================================================================
   ASHNEL INC. — Enterprise Design System Stylesheet
   Aesthetic: Linear meets Stripe with Institutional Warmth
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400;1,6..72,500&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- CSS Reset & Global Tokens --- */
:root {
  /* Obsidian Dark Palette */
  --obsidian-950: #080C15;
  --obsidian-900: #0F172A;
  --obsidian-850: #131D31;
  --obsidian-800: #1E293B;
  --obsidian-700: #334155;
  
  /* Slate Grays */
  --slate-600: #475569;
  --slate-500: #64748B;
  --slate-400: #94A3B8;
  --slate-300: #CBD5E1;
  --slate-200: #E2E8F0;
  --slate-100: #F1F5F9;
  --slate-50: #F8FAFC;
  --white: #FFFFFF;

  /* Official AshNel Logo Warm Vermilion-Amber Accent */
  --amber-600: #D95A1E;
  --amber-500: #E46824;
  --amber-700: #B84411;
  --amber-800: #93330B;
  --amber-900: #782706;
  --amber-950: #451503;
  --amber-100: #FFEDD5;
  --amber-50: #FFF7ED;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', var(--font-sans);
  --font-serif: 'Newsreader', 'Cormorant Garamond', Georgia, "Times New Roman", serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--slate-50);
  color: var(--obsidian-900);
  line-height: 1.5;
}

/* --- Sticky Header Persistence --- */
#main-header,
header.sticky {
  position: -webkit-sticky !important;
  position: sticky !important;
  top: 0 !important;
  z-index: 50 !important;
}

/* --- Font Utility Classes --- */
.font-sans { font-family: var(--font-sans); }
.font-heading { font-family: var(--font-heading); }
.font-serif { font-family: var(--font-serif); }
.font-mono { font-family: var(--font-mono); }

/* --- Obsidian & Amber Color Utilities --- */
.bg-obsidian-950 { background-color: var(--obsidian-950); }
.bg-obsidian-900 { background-color: var(--obsidian-900); }
.bg-obsidian-850 { background-color: var(--obsidian-850); }
.bg-obsidian-800 { background-color: var(--obsidian-800); }
.border-obsidian-800 { border-color: var(--obsidian-800); }
.border-obsidian-700 { border-color: var(--obsidian-700); }
.text-obsidian-950 { color: var(--obsidian-950); }

/* --- Grid & Geometric Background Patterns (Removed) --- */
.bg-grid-pattern {
  display: none !important;
}

.bg-dark-grid {
  background-size: 32px 32px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
}

/* --- Buttons & Interactive Elements --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--amber-600);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.625rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(217, 119, 6, 0.4);
  transition: all 0.15s ease-in-out;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary:hover {
  background-color: var(--amber-700);
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.25);
  transform: translateY(-1px);
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--white);
  color: var(--obsidian-900);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.625rem;
  border: 1px solid var(--slate-300);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  transition: all 0.15s ease-in-out;
  cursor: pointer;
  text-decoration: none;
}

.btn-secondary:hover {
  background-color: var(--slate-50);
  border-color: var(--slate-400);
  color: var(--obsidian-950);
  transform: translateY(-1px);
}

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

/* Mobile Nav Link */
.mobile-nav-link {
  display: block;
  padding: 0.625rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-600);
  text-decoration: none;
  transition: background-color 0.15s, color 0.15s;
}

.mobile-nav-link:hover {
  background-color: var(--slate-100);
  color: var(--obsidian-950);
}

/* --- Estimator Step Indicator --- */
.step-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--slate-400);
  font-weight: 600;
}

.step-badge .step-num {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 9999px;
  background-color: var(--slate-200);
  color: var(--slate-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

.step-badge.active {
  color: var(--obsidian-950);
}

.step-badge.active .step-num {
  background-color: var(--amber-600);
  color: var(--white);
}

.step-badge.completed {
  color: var(--obsidian-900);
}

.step-badge.completed .step-num {
  background-color: var(--obsidian-900);
  color: var(--white);
}

/* Track / Option Radio Cards */
.track-option.selected,
.timeline-option.selected {
  border-color: var(--amber-600) !important;
  background-color: var(--amber-50) !important;
  box-shadow: 0 0 0 1px var(--amber-600);
}

/* --- Modal Backdrop & Animation --- */
.modal-backdrop {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
  display: flex !important;
}

/* --- Custom Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--slate-100);
}

::-webkit-scrollbar-thumb {
  background: var(--slate-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--slate-400);
}

/* Utility transitions */
.transition-all {
  transition-property: all;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

/* --- Typewriter Cursor Styling --- */
.typewriter-cursor {
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background-color: var(--amber-600);
  margin-left: 6px;
  vertical-align: middle;
  border-radius: 1px;
  animation: cursorBlink 0.8s infinite;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* --- Portfolio Filter Tabs --- */
.portfolio-filter-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
  background-color: var(--slate-100);
  color: var(--slate-600);
  border: 1px solid var(--slate-200);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
}

.portfolio-filter-btn:hover {
  background-color: var(--slate-200);
  color: var(--obsidian-950);
}

.portfolio-filter-btn.active {
  background-color: var(--obsidian-900);
  color: #FFFFFF;
  border-color: var(--obsidian-900);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.portfolio-card.hidden-card {
  display: none !important;
}

/* --- Animated Arrow Bounce --- */
@keyframes arrowBounceX {
  0%, 100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(6px);
  }
}

.animate-arrow-bounce-x {
  animation: arrowBounceX 1.5s ease-in-out infinite;
}

/* --- Ambient Architectural Watermark (Concept 1: Curtain Reveal) --- */
#ambient-watermark {
  opacity: 0.50;
}