/*
 * Kelu Multiple Services — Design System
 * Navy / gold trust palette for an immigration & naturalization services brand.
 */

:root {
  --navy: #0c2340;
  --navy-light: #163a5e;
  --navy-deep: #071527;
  --gold: #c89b3c;
  --gold-light: #e0c179;
  --gold-dark: #9c7622;
  --red-accent: #9c2b2b;
  --ivory: #faf7f0;
  --cream: #f3efe4;
  --text-dark: #2d2a24;
  --text-muted: #6b6558;
  --border-color: #e3ddc9;
  --radius-sm: 10px;
  --radius-md: 20px;
  --shadow-sm: 0 4px 14px -4px rgba(12, 35, 64, 0.12);
  --shadow-md: 0 14px 34px -10px rgba(12, 35, 64, 0.18);
  --shadow-lg: 0 26px 60px -16px rgba(12, 35, 64, 0.28);
  --font-display: 'Fraunces', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--ivory);
  color: var(--text-dark);
  overflow-x: hidden;
}

/* ---------- Preloader ---------- */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--navy-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

#preloader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-mark {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--gold-light);
  letter-spacing: 4px;
  animation: pulseFade 1.4s ease-in-out infinite;
}

@keyframes pulseFade {
  0%, 100% { opacity: 0.4; transform: scale(0.97); }
  50% { opacity: 1; transform: scale(1); }
}

/* ---------- Scroll progress + back to top ---------- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--gold-dark), var(--gold-light));
  z-index: 1000;
  transition: width 0.1s linear;
}

#back-to-top {
  position: fixed;
  bottom: 26px;
  right: 26px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--gold-light);
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.35s ease;
  z-index: 500;
  box-shadow: var(--shadow-md);
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  background: var(--gold-dark);
  color: white;
}

/* ---------- Scroll reveal (opacity-safe: no permanent will-change) ---------- */
.reveal-fade {
  opacity: 0;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: calc(var(--d, 0) * 90ms);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: calc(var(--d, 0) * 90ms);
}

.reveal.is-animating,
.reveal-fade.is-animating {
  will-change: opacity, transform;
}

.reveal.is-visible,
.reveal-fade.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Animated hero mesh background ---------- */
.hero-mesh {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-mesh::before,
.hero-mesh::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: meshDrift 18s ease-in-out infinite alternate;
}

.hero-mesh::before {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
  top: -120px;
  right: -80px;
}

.hero-mesh::after {
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, #8fa8c9 0%, transparent 70%);
  bottom: -140px;
  left: -100px;
  animation-delay: -9s;
}

@keyframes meshDrift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -30px) scale(1.12); }
}

/* ---------- Sticky nav ---------- */
#site-nav {
  transition: background-color 0.35s ease, box-shadow 0.35s ease, padding 0.35s ease;
}

#site-nav.nav-scrolled {
  background-color: rgba(12, 35, 64, 0.96);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

/* ---------- Language toggle ---------- */
[data-i18n], [data-i18n-placeholder] {
  transition: opacity 0.25s ease;
}

body.lang-switching [data-i18n] {
  opacity: 0;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 30px;
  overflow: hidden;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.lang-toggle button {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.6);
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lang-toggle button.active {
  background: var(--gold);
  color: var(--navy-deep);
}

/* ---------- Service cards ---------- */
.service-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s ease;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-dark), var(--gold-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  color: var(--gold-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 20px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover .service-icon {
  transform: scale(1.08) rotate(-4deg);
}

/* ---------- Trust badges ---------- */
.trust-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
}

.trust-badge i {
  color: var(--gold-dark);
}

/* ---------- Process steps ---------- */
.process-step {
  position: relative;
}

.process-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--gold);
  font-weight: 600;
  line-height: 1;
}

/* ---------- Buttons ---------- */
.btn-gold {
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--navy-deep);
  font-weight: 700;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 26px -10px rgba(200, 155, 60, 0.55);
}

.btn-outline-light {
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  color: white;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: white;
}

.ripple-span {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: scale(0);
  animation: rippleAnim 0.7s ease-out;
  pointer-events: none;
}

@keyframes rippleAnim {
  to { transform: scale(2.6); opacity: 0; }
}

/* ---------- Contact form ---------- */
.kelu-input,
.kelu-select,
.kelu-textarea {
  width: 100%;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-dark);
  background: white;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.kelu-input:focus,
.kelu-select:focus,
.kelu-textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 155, 60, 0.15);
}

/* ---------- FAQ accordion ---------- */
.accordion-item {
  border-bottom: 1px solid var(--border-color);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 4px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--navy);
}

.accordion-trigger i {
  transition: transform 0.35s ease;
  color: var(--gold-dark);
}

.accordion-item.open .accordion-trigger i {
  transform: rotate(45deg);
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.accordion-item.open .accordion-panel {
  max-height: 240px;
}

.accordion-panel-inner {
  padding: 0 4px 22px;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ---------- Mobile drawer ---------- */
#mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(320px, 85vw);
  background: var(--navy-deep);
  z-index: 1100;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 32px 28px;
}

#mobile-drawer.open {
  transform: translateX(0);
}

#mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 21, 39, 0.6);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

#mobile-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ---------- Scrollbar (subtle brand touch) ---------- */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--gold-dark);
  border-radius: 10px;
}