/* ==========================================================================
   Reusable Components
   ========================================================================== */

/* ---- Glass panel base ---- */
.glass {
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

/* ---- Buttons ---- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.9rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  isolation: isolate;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  color: #05060a;
  background: var(--gradient-primary);
  background-size: 180% 180%;
  background-position: 0% 50%;
  box-shadow: 0 10px 30px -8px rgba(79, 125, 255, 0.55);
}

.btn-primary:hover {
  background-position: 100% 50%;
  box-shadow: 0 14px 40px -6px rgba(155, 92, 246, 0.6);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text-0);
  background: var(--surface-1);
  border: 1px solid var(--border-2);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

.btn-ghost:hover {
  background: var(--surface-2);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.btn-icon {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

.btn-sm {
  padding: 0.65rem 1.3rem;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* Glass contact buttons (large, iconic) */
.btn-glass-contact {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  overflow: hidden;
  transition: transform var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out), box-shadow var(--dur-mid) var(--ease-out);
}

.btn-glass-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease-out);
  z-index: -1;
}

.btn-glass-contact:hover {
  transform: translateY(-4px);
  border-color: transparent;
  box-shadow: var(--shadow-lg);
}

.btn-glass-contact:hover::before {
  opacity: 0.16;
}

.btn-glass-contact .contact-icon {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--surface-2);
  color: var(--text-0);
}

.btn-glass-contact .contact-icon svg {
  width: 22px;
  height: 22px;
}

.btn-glass-contact .contact-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  text-align: left;
}

.btn-glass-contact .contact-label {
  font-size: var(--fs-xs);
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.btn-glass-contact .contact-value {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-0);
  font-size: 1.02rem;
}

.btn-glass-contact--icon-only {
  justify-content: center;
  padding-block: 1.4rem;
}

.btn-glass-contact--icon-only .contact-icon {
  width: 52px;
  height: 52px;
}

.btn-glass-contact--icon-only .contact-icon svg {
  width: 24px;
  height: 24px;
}

.btn-glass-contact .contact-icon--telegram {
  background: #26a5e4;
  color: #fff;
}

.btn-glass-contact .contact-icon--whatsapp {
  background: #25d366;
  color: #fff;
}

.btn-glass-contact .contact-icon--viber {
  background: #7360f2;
  color: #fff;
}

.btn-glass-contact .contact-icon--phone {
  background: var(--gradient-primary);
  color: #fff;
}

/* ---- Badge / pill ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-1);
  background: var(--surface-1);
  border: 1px solid var(--border-1);
}

/* ---- Card base ---- */
.card {
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  transition: transform var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out), box-shadow var(--dur-mid) var(--ease-out);
  overflow: hidden;
}

.card-glow {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease-out);
  pointer-events: none;
  z-index: 0;
  background: var(--gradient-primary);
}

.card:hover .card-glow {
  opacity: 0.35;
}

.card > *:not(.card-glow) {
  position: relative;
  z-index: 1;
}

/* ---- Header / Nav ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out), height var(--dur-mid) var(--ease-out), backdrop-filter var(--dur-mid) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  height: 68px;
  background: rgba(6, 8, 16, 0.72);
  border-bottom: 1px solid var(--border-1);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-0);
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--gradient-primary);
  color: #05060a;
  font-weight: 800;
  font-family: var(--font-display);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2.4rem;
}

.nav-desktop a {
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--dur-fast) var(--ease-out);
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--dur-mid) var(--ease-out);
}

.nav-desktop a:hover {
  color: var(--text-0);
}

.nav-desktop a:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ---- Language switch ---- */
.lang-switch {
  display: inline-flex;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  overflow: hidden;
}

.lang-switch button {
  padding: 0.5rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text-2);
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}

.lang-switch button:hover {
  color: var(--text-0);
}

.lang-switch button.active {
  color: #05060a;
  background: var(--gradient-primary);
}

.nav-mobile .lang-switch {
  margin-top: -0.5rem;
}

.nav-mobile .lang-switch button {
  padding: 0.6rem 1.1rem;
  font-size: 0.85rem;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-1);
  background: var(--surface-1);
  place-items: center;
  position: relative;
  z-index: 210;
}

.nav-toggle span {
  position: absolute;
  width: 18px;
  height: 1.5px;
  background: var(--text-0);
  transition: transform var(--dur-mid) var(--ease-out), opacity var(--dur-mid) var(--ease-out);
}

.nav-toggle span:nth-child(1) { transform: translateY(-5px); }
.nav-toggle span:nth-child(3) { transform: translateY(5px); }

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg); }

.nav-mobile {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(5, 6, 10, 0.97);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  transform: translateY(-100%);
  opacity: 0;
  transition: transform var(--dur-slow) var(--ease-out), opacity var(--dur-slow) var(--ease-out);
  pointer-events: none;
}

.nav-mobile.active {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

#navMobileLinks {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.nav-mobile a {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-0);
}

.nav-mobile .header-actions {
  margin-top: 1rem;
}

/* ---- Scroll progress ---- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--gradient-primary);
  z-index: 300;
  transition: width 0.1s linear;
}

/* ---- Back to top ---- */
.back-to-top {
  position: fixed;
  right: clamp(1.25rem, 4vw, 2.5rem);
  bottom: clamp(1.25rem, 4vw, 2.5rem);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  backdrop-filter: var(--blur-glass);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--dur-mid) var(--ease-out), transform var(--dur-mid) var(--ease-out), border-color var(--dur-fast);
}

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

.back-to-top:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  color: var(--text-0);
}

/* ---- Custom cursor glow (desktop) ---- */
.cursor-glow {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 125, 255, 0.12), transparent 70%);
  pointer-events: none;
  z-index: 5;
  transform: translate(-50%, -50%);
  will-change: transform;
}

/* ---- Preloader ---- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: var(--bg-0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  transition: opacity 0.7s var(--ease-out), visibility 0.7s var(--ease-out);
}

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

.preloader-mark {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--gradient-primary);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: #05060a;
  animation: preloaderPulse 1.4s var(--ease-in-out) infinite;
}

.preloader-bar {
  width: 160px;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--surface-2);
  overflow: hidden;
}

.preloader-bar::after {
  content: "";
  display: block;
  height: 100%;
  width: 40%;
  background: var(--gradient-primary);
  animation: preloaderBar 1.1s var(--ease-in-out) infinite;
}

/* ---- Divider ---- */
.divider {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--border-2), transparent);
  border: none;
}

/* ---- Avatar / photo placeholder ---- */
.photo-frame {
  position: relative;
  width: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-1);
  aspect-ratio: 4 / 5;
  background: linear-gradient(160deg, #12162a, #0a0c18 60%);
}