/* ============================================
   Indo Gulf Audit — Global Stylesheet
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  --primary: #1a3a6b;
  --primary-rgb: 26, 58, 107;
  --accent-gold: #d4a843;
  --accent-gold-rgb: 212, 168, 67;
  --accent-teal: #00a884;
  --accent-teal-rgb: 0, 168, 132;
  --bg-light: #f6f7f8;
  --bg-dark: #13181f;
  --transition-base: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Geometric Background Pattern --- */
.geometric-bg {
  background-color: var(--bg-light);
  background-image: radial-gradient(rgba(var(--primary-rgb), 0.13) 1px, transparent 1px),
                    radial-gradient(rgba(var(--primary-rgb), 0.13) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: 0 0, 20px 20px;
}

.hero-pattern {
  background-color: var(--primary);
  background-image: radial-gradient(circle at 2px 2px, rgba(var(--accent-gold-rgb), 0.15) 1px, transparent 0);
  background-size: 40px 40px;
}

.gold-gradient {
  background: linear-gradient(135deg, #d4a843 0%, #f1d592 50%, #d4a843 100%);
}

/* --- Mobile Navigation Overlay --- */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.mobile-nav-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 101;
  width: 300px;
  max-width: 85vw;
  background: #fff;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  overflow-y: auto;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
}

.mobile-nav-panel.active {
  transform: translateX(0);
}

.mobile-nav-panel .close-btn {
  align-self: flex-end;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--primary);
  padding: 0.5rem;
}

.mobile-nav-panel nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 2rem;
}

.mobile-nav-panel nav a {
  display: block;
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #334155;
  text-decoration: none;
  border-radius: 0.5rem;
  transition: background var(--transition-base), color var(--transition-base);
}

.mobile-nav-panel nav a:hover,
.mobile-nav-panel nav a.active {
  background: rgba(var(--primary-rgb), 0.08);
  color: var(--primary);
}

.mobile-nav-panel nav a.active {
  font-weight: 800;
  border-left: 3px solid var(--accent-gold);
}

.mobile-nav-panel .mobile-cta {
  margin-top: auto;
  padding-top: 1.5rem;
}

/* --- Desktop Nav Active State --- */
header nav a.active {
  color: var(--accent-gold) !important;
  position: relative;
}

header nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gold);
  border-radius: 1px;
}

/* --- Fade-In on Scroll Animation --- */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Service Card Hover Bottom Bar (used in homepage) --- */
.service-card-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--accent-teal);
  transition: width var(--transition-base);
}

.group:hover .service-card-bar {
  width: 100%;
}

/* --- Counter Animation --- */
.counter-value {
  display: inline-block;
}

/* --- FAQ Accordion --- */
.faq-item .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding-top: 0;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-top: 1rem;
}

.faq-item .faq-icon {
  transition: transform var(--transition-base);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

/* --- Form Success Message --- */
.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
}

.form-success.show {
  display: block;
}

.form-success .success-icon {
  font-size: 4rem;
  color: var(--accent-teal);
  margin-bottom: 1rem;
}

/* --- Utility: Stagger animation delays for cards --- */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* --- Button hover lift effect --- */
.btn-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.btn-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* --- Scrollbar (subtle) --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
  background: rgba(var(--primary-rgb), 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(var(--primary-rgb), 0.5);
}