/* ================================================
   Ubden® Components
   ================================================ */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: var(--fs-base);
  line-height: 1.2;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  will-change: transform;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-glow-cyan);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: var(--shadow-glow-purple); }

.btn-outline {
  border-color: var(--border-strong);
  color: var(--text);
  background: var(--surface);
  backdrop-filter: blur(6px);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-3px); }

.btn-sm { padding: 0.55rem 1.3rem; font-size: var(--fs-sm); }
.btn-lg { padding: 1rem 2.4rem; font-size: 1.1rem; }

/* ---------- Navbar ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
}
.navbar {
  background: var(--nav-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border);
  transition: background 0.4s ease;
}
.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 72px;
}
.logo { display: inline-flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 36px; width: auto; }
[data-theme="light"] .logo-img { filter: invert(0.85) hue-rotate(180deg); }

.nav-menu { display: flex; align-items: center; gap: 1.5rem; }
.nav-list { display: flex; align-items: center; gap: 0.25rem; }
.nav-link {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
  border-radius: 999px;
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover { color: var(--text); background: var(--surface-strong); }
.nav-link.active { color: var(--text); }
.nav-link.active::after {
  content: '';
  display: block;
  height: 2px;
  margin: 2px 10px 0;
  border-radius: 2px;
  background: var(--gradient-brand);
}

.nav-actions { display: flex; align-items: center; gap: 0.6rem; }

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); transform: rotate(15deg); }
.theme-toggle .icon-sun, .theme-toggle .icon-moon { width: 20px; height: 20px; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }

/* Language switcher */
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface);
}
.lang-switch a {
  padding: 0.35rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  transition: background var(--transition), color var(--transition);
}
.lang-switch a.active {
  background: var(--gradient-brand);
  color: #fff;
}
.lang-switch a:not(.active):hover { color: var(--text); }

/* Hamburger */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
}
.hamburger-line {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s;
}
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) { opacity: 0; }
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Glass card ---------- */
.glass-card {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.glass-card::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 55%;
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, 0.1) 50%, transparent 80%);
  transform: translateX(-180%) skewX(-18deg);
  pointer-events: none;
}
.glass-card:hover::after { animation: shimmerSweep 0.9s var(--ease-out); }
[data-theme="light"] .glass-card::after {
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, 0.7) 50%, transparent 80%);
}

/* 3D tilt cards */
.tilt-card { transform-style: preserve-3d; will-change: transform; }
.tilt-card .tilt-inner { transform: translateZ(30px); }
.service-card .tilt-inner {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.service-card .tilt-inner > .btn { margin-top: auto; align-self: flex-start; }

/* ---------- Stat cards ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.stat-card {
  padding: var(--space-4) var(--space-3);
  text-align: center;
}
.stat-card:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.stat-icon { display: flex; justify-content: center; margin-bottom: var(--space-2); }
.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 700;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label { color: var(--text-muted); font-size: var(--fs-sm); font-weight: 500; }

/* ---------- Service cards ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-3);
}
.service-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-4) var(--space-3);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--gradient-full);
  opacity: 0;
  transition: opacity var(--transition);
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-glow-cyan); }
.service-card:hover::before { opacity: 1; }
.service-icon { margin-bottom: var(--space-3); }
.service-icon img, .service-icon svg { width: 72px; height: 72px; }
.service-title { font-size: var(--fs-h3); margin-bottom: var(--space-2); }
.service-description { color: var(--text-muted); margin-bottom: var(--space-3); flex-grow: 1; }
.service-features { margin-bottom: var(--space-3); display: grid; gap: 0.5rem; }
.service-features li {
  position: relative;
  padding-left: 1.6rem;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}
.service-features li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.42em;
  width: 0.85rem; height: 0.5rem;
  border-left: 2px solid var(--brand-green);
  border-bottom: 2px solid var(--brand-green);
  transform: rotate(-45deg);
}

/* ---------- Office cards ---------- */
.offices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-3);
}
.office-card { padding: var(--space-4) var(--space-3); }
.office-card:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.office-flag {
  width: 64px; height: 42px;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: var(--space-2);
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
}
.office-region { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--accent); margin-bottom: 0.3rem; }
.office-name { font-size: var(--fs-h3); margin-bottom: var(--space-1); }
.office-description { color: var(--text-muted); font-size: var(--fs-sm); margin-bottom: var(--space-2); }
.office-contact { display: grid; gap: 0.5rem; font-size: var(--fs-sm); color: var(--text-muted); }
.office-contact strong { color: var(--text); }

/* ---------- Certification cards ---------- */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-3);
}
.certification-card {
  padding: var(--space-3);
  position: relative;
  overflow: hidden;
}
.certification-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-glow-purple); }
.certification-year {
  position: absolute;
  top: var(--space-2); right: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--accent);
}
.certification-title { font-size: 1.05rem; margin-bottom: 0.4rem; padding-right: 3.5rem; }
.certification-org { color: var(--text-muted); font-size: var(--fs-sm); }

/* ---------- Testimonials carousel ---------- */
.testimonials-carousel-wrapper { position: relative; max-width: 860px; margin-inline: auto; }
.testimonials-carousel { position: relative; overflow: hidden; }
.testimonial-slide { display: none; }
.testimonial-slide.active { display: block; animation: slideFadeIn 0.55s var(--ease-out); perspective: 1100px; }
.testimonial-card-3d {
  padding: clamp(1.5rem, 4vw, 3rem);
  transform-style: preserve-3d;
  animation: cardSwingSoft 9s ease-in-out infinite;
  animation-delay: 0.55s;
}
.testimonial-card-3d:hover {
  animation-play-state: paused;
  border-color: var(--accent);
  box-shadow: var(--shadow-glow-cyan);
}
.testimonial-header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: var(--space-3); flex-wrap: wrap; }
.testimonial-rating .star { color: var(--brand-orange); font-size: 1.1rem; }
.testimonial-category {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--accent);
}
.testimonial-quote { font-size: var(--fs-lead); line-height: 1.7; margin-bottom: var(--space-3); color: var(--text); }
.testimonial-author strong { display: block; font-family: var(--font-heading); }
.testimonial-author span { color: var(--text-muted); font-size: var(--fs-sm); }
.testimonial-stats { display: flex; gap: var(--space-4); margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px solid var(--border); }
.testimonial-stats .stat-value {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.testimonial-stats .stat-description { color: var(--text-muted); font-size: var(--fs-sm); }

.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  color: var(--text);
  transition: border-color var(--transition), color var(--transition);
  z-index: 2;
}
.carousel-nav:hover { border-color: var(--accent); color: var(--accent); }
.carousel-prev { left: -23px; }
.carousel-next { right: -23px; }
.carousel-dots { display: flex; justify-content: center; gap: 0.5rem; margin-top: var(--space-3); }
.carousel-dot {
  width: 10px; height: 10px;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  transition: width var(--transition), background var(--transition);
}
.carousel-dot.active { width: 28px; background: var(--gradient-brand); border-color: transparent; }

/* ---------- Forms ---------- */
.form-group { margin-bottom: var(--space-3); }
.form-label { display: block; font-weight: 600; font-size: var(--fs-sm); margin-bottom: 0.5rem; }
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}
.form-textarea { min-height: 150px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.form-select option {
  background: var(--bg-raised);
  color: var(--text);
}
.form-hint { display: block; color: var(--text-muted); font-size: var(--fs-sm); margin-bottom: 0.6rem; }
.captcha-row { display: flex; align-items: center; gap: var(--space-2); }
.captcha-question {
  flex-shrink: 0;
  min-width: 110px;
  padding: 0.85rem 1.1rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--surface-strong);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  text-align: center;
  user-select: none;
}
.captcha-input { max-width: 160px; }

/* ---------- Footer ---------- */
.footer {
  position: relative;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-top: var(--space-5);
  overflow: hidden;
}
.footer-glow {
  position: absolute;
  top: -120px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 240px;
  background: radial-gradient(ellipse, var(--hero-glow-2), transparent 70%);
  pointer-events: none;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
}
.footer-title { font-size: 1rem; margin-bottom: var(--space-2); }
.footer-description { color: var(--text-muted); font-size: var(--fs-sm); max-width: 340px; margin-bottom: var(--space-3); }
.footer-links { display: grid; gap: 0.6rem; }
.footer-links a { color: var(--text-muted); font-size: var(--fs-sm); transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-social { display: flex; gap: 0.6rem; }
.social-link {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.social-link:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-3px); }
.social-link svg { width: 18px; height: 18px; }

.footer-bottom { border-top: 1px solid var(--border); padding-block: var(--space-3); }
.footer-bottom-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.legal-links { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.legal-links a { color: var(--text-faint); font-size: 0.8rem; }
.legal-links a:hover { color: var(--accent); }
.footer-copyright { color: var(--text-faint); font-size: 0.8rem; text-align: center; }

/* ---------- Page loader ---------- */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.6rem;
  background: var(--bg);
  transition: opacity 0.55s ease, visibility 0.55s;
}
.page-loader.hidden { opacity: 0; visibility: hidden; }
.loader-mark { position: relative; display: flex; align-items: center; justify-content: center; width: 118px; height: 118px; }
.loader-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid var(--surface-strong);
  border-top-color: var(--brand-cyan);
  border-right-color: var(--brand-purple);
  animation: spin 0.9s linear infinite;
}
.loader-ring-2 {
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-bottom-color: var(--brand-green);
  border-left-color: var(--brand-orange);
  animation: spin 1.4s linear infinite reverse;
}
.loader-icon { height: 46px; width: auto; animation: loaderPulse 1.2s ease-in-out infinite alternate; }
.loader-logo { height: 30px; width: auto; opacity: 0.9; }
[data-theme="light"] .loader-icon, [data-theme="light"] .loader-logo { filter: invert(0.85) hue-rotate(180deg); }
.loader-bar { width: 150px; height: 3px; border-radius: 999px; background: var(--surface-strong); overflow: hidden; }
.loader-bar::before {
  content: '';
  display: block;
  width: 45%; height: 100%;
  border-radius: 999px;
  background: var(--gradient-brand);
  animation: loaderBar 1.1s ease-in-out infinite;
}

/* ---------- WhatsApp sticky button ---------- */
.whatsapp-fab {
  position: fixed;
  right: calc(1.2rem + env(safe-area-inset-right, 0px));
  bottom: calc(1.2rem + env(safe-area-inset-bottom, 0px));
  z-index: calc(var(--z-nav) - 1);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 10px 30px rgba(37, 211, 102, 0.35), var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-fab:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 14px 38px rgba(37, 211, 102, 0.5);
}
.whatsapp-fab svg { width: 30px; height: 30px; }
.whatsapp-fab .wa-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid #25d366;
  animation: waPulse 2.4s ease-out infinite;
  pointer-events: none;
}
[data-theme="light"] .whatsapp-fab { box-shadow: 0 10px 26px rgba(37, 211, 102, 0.4); }
@media (max-width: 640px) {
  .whatsapp-fab { width: 52px; height: 52px; right: calc(1rem + env(safe-area-inset-right, 0px)); bottom: calc(1rem + env(safe-area-inset-bottom, 0px)); }
  .whatsapp-fab svg { width: 26px; height: 26px; }
}

/* Scroll progress */
.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  height: 3px;
  width: 0;
  background: var(--gradient-full);
  z-index: calc(var(--z-nav) + 1);
}

/* ---------- Breadcrumb hero (inner pages) ---------- */
.page-hero {
  position: relative;
  padding: calc(72px + var(--space-5)) 0 var(--space-5);
  overflow: hidden;
  background:
    radial-gradient(600px 300px at 15% 20%, var(--hero-glow-1), transparent 70%),
    radial-gradient(600px 300px at 85% 10%, var(--hero-glow-2), transparent 70%),
    var(--bg-alt);
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 75% 80% at 50% 20%, #000 25%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 75% 80% at 50% 20%, #000 25%, transparent 72%);
  pointer-events: none;
}
.page-hero::after {
  content: '';
  position: absolute;
  top: -40%; right: -10%;
  width: 55vw; height: 55vw;
  max-width: 700px; max-height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--hero-glow-2), transparent 65%);
  filter: blur(80px);
  animation: auroraDrift 28s ease-in-out infinite;
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero canvas.page-hero-particles {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}
.page-hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 5.5vw, 3.9rem);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
  max-width: 800px;
}
.page-hero-title .char { display: inline-block; will-change: transform, opacity; }
.page-hero-subtitle { color: var(--text-muted); font-size: var(--fs-lead); max-width: 640px; }

/* ---------- Responsive ---------- */
@media (max-width: 1280px) {
  .carousel-prev { left: 8px; }
  .carousel-next { right: 8px; }
}

@media (max-width: 900px) {
  .mobile-menu-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) clamp(1.25rem, 4vw, 2.5rem) var(--space-3);
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.4s var(--ease-out), opacity 0.3s, visibility 0.4s;
    z-index: -1;
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0.2rem; margin-bottom: var(--space-2); }
  .nav-link { display: block; padding: 0.8rem 1rem; font-size: 1.05rem; }
  .nav-link.active::after { margin: 2px 0 0; width: 40px; }
  .nav-actions { justify-content: flex-start; }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-bottom-content { justify-content: center; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .testimonial-stats { gap: var(--space-3); flex-wrap: wrap; }
  .carousel-nav { display: none; }
}