:root {
  --vk-bg: #0f1419;
  --vk-surface: #1a2332;
  --vk-surface-2: #243044;
  --vk-accent: #2dd4bf;
  --vk-accent-dim: #14b8a6;
  --vk-text: #f1f5f9;
  --vk-muted: #94a3b8;
  --vk-border: rgba(148, 163, 184, 0.15);
  --vk-glow: rgba(45, 212, 191, 0.25);
  --vk-radius: 14px;
  --vk-font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

html {
  font-size: 16px;
}

body.vk-landing {
  margin: 0;
  min-height: 100vh;
  font-family: var(--vk-font);
  background: radial-gradient(1200px 600px at 10% -10%, rgba(45, 212, 191, 0.12), transparent),
    radial-gradient(900px 500px at 100% 0%, rgba(59, 130, 246, 0.08), transparent),
    var(--vk-bg);
  color: var(--vk-text);
}

.vk-nav {
  backdrop-filter: blur(12px);
  background: rgba(15, 20, 25, 0.75);
  border-bottom: 1px solid var(--vk-border);
}

.vk-nav .navbar-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--vk-text) !important;
}

.vk-brand-mark .vk-brand-logo {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  object-fit: contain;
  display: block;
}

.vk-nav .vk-brand-suffix {
  color: var(--vk-accent);
}

.vk-nav .nav-link {
  color: var(--vk-muted) !important;
  font-weight: 500;
}

.vk-nav .nav-link:hover,
.vk-nav .nav-link:focus {
  color: var(--vk-accent) !important;
}

/* Bootstrap: .navbar-toggler-icon yalnızca navbar-dark/light ile bg alır; vk-nav koyu tema — SVG burada */
.vk-nav .navbar-toggler {
  color: var(--vk-text);
  border: 1px solid rgba(241, 245, 249, 0.4);
  background-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
}

.vk-nav .navbar-toggler:hover,
.vk-nav .navbar-toggler:focus {
  border-color: var(--vk-accent);
  background-color: rgba(45, 212, 191, 0.16);
}

.vk-nav .navbar-toggler:focus-visible {
  outline: 2px solid var(--vk-accent);
  outline-offset: 2px;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
}

.vk-nav .navbar-toggler-icon {
  filter: none;
  width: 1.35em;
  height: 1.35em;
  /* Beyaza yakın çizgi — koyu zeminde kontrast */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%23ffffff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.25' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

.vk-nav .navbar-toggler:hover .navbar-toggler-icon,
.vk-nav .navbar-toggler:focus .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%232dd4bf' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.25' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

/* Klinik adı: mobilde collapse dışında — hamburger kapalıyken de görünsün */
.vk-nav .vk-nav-klinik {
  min-width: 0;
  max-width: min(12rem, 42vw);
}

@media (min-width: 992px) {
  .vk-nav .vk-nav-klinik {
    max-width: 14rem;
  }
}

.vk-btn-ghost {
  border: 1px solid var(--vk-border);
  color: var(--vk-text);
  background: transparent;
  border-radius: 10px;
  padding: 0.45rem 1rem;
  font-weight: 600;
}

.vk-btn-ghost:hover {
  border-color: var(--vk-accent);
  color: var(--vk-accent);
}

.vk-btn-primary {
  background: linear-gradient(135deg, var(--vk-accent), var(--vk-accent-dim));
  border: none;
  color: #042f2e;
  font-weight: 700;
  border-radius: 10px;
  padding: 0.5rem 1.15rem;
  box-shadow: 0 8px 24px var(--vk-glow);
}

.vk-btn-primary:hover {
  filter: brightness(1.05);
  color: #042f2e;
}

.vk-hero {
  padding: 4rem 0 3rem;
}

@media (min-width: 992px) {
  .vk-hero {
    padding: 5.5rem 0 4rem;
  }
}

.vk-hero h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.vk-hero .lead {
  color: var(--vk-muted);
  font-size: 1.1rem;
  max-width: 36rem;
}

.vk-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--vk-surface);
  border: 1px solid var(--vk-border);
  color: var(--vk-accent);
  font-size: 0.8rem;
  font-weight: 600;
}

.vk-card {
  background: var(--vk-surface);
  border: 1px solid var(--vk-border);
  border-radius: var(--vk-radius);
  padding: 1.35rem;
  height: 100%;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.vk-card:hover {
  transform: translateY(-3px);
  border-color: rgba(45, 212, 191, 0.35);
}

.vk-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.vk-card p {
  color: var(--vk-muted);
  font-size: 0.92rem;
  margin: 0;
}

.vk-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--vk-surface-2);
  color: var(--vk-accent);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.vk-section-title {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.vk-footer {
  border-top: 1px solid var(--vk-border);
  padding: 2rem 0;
  margin-top: 4rem;
  color: var(--vk-muted);
  font-size: 0.9rem;
}

.vk-footer a {
  color: var(--vk-muted);
  text-decoration: none;
}

.vk-footer a:hover {
  color: var(--vk-accent);
}

/* Modals */
.modal-content.vk-modal {
  background: var(--vk-surface);
  color: var(--vk-text);
  border: 1px solid var(--vk-border);
  border-radius: var(--vk-radius);
}

.vk-modal .modal-header {
  border-bottom-color: var(--vk-border);
}

.vk-modal .modal-footer {
  border-top-color: var(--vk-border);
}

.vk-modal .btn-close {
  filter: invert(1);
  opacity: 0.6;
}

.vk-modal .form-control,
.vk-modal .form-select {
  background: var(--vk-bg);
  border: 1px solid var(--vk-border);
  color: var(--vk-text);
}

.vk-modal .form-control:focus {
  border-color: var(--vk-accent);
  box-shadow: 0 0 0 0.2rem var(--vk-glow);
  background: var(--vk-bg);
  color: var(--vk-text);
}

.vk-modal .form-label {
  color: var(--vk-muted);
  font-size: 0.875rem;
}

.vk-otp-hint {
  background: rgba(45, 212, 191, 0.1);
  border: 1px dashed rgba(45, 212, 191, 0.4);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: var(--vk-accent);
}

.vk-timer {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--vk-accent);
}

.vk-alert-error {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fecaca;
  border-radius: 10px;
  padding: 0.6rem 0.85rem;
  font-size: 0.875rem;
}

/* Landing home — hero splash & sections */
.vk-hero--splash {
  position: relative;
  overflow: hidden;
}

.vk-hero__glow {
  pointer-events: none;
  position: absolute;
  inset: -40% -20% auto -30%;
  height: min(70vw, 520px);
  background: radial-gradient(closest-side, rgba(45, 212, 191, 0.22), transparent 72%),
    radial-gradient(closest-side at 80% 40%, rgba(59, 130, 246, 0.14), transparent 65%);
  filter: blur(2px);
}

.vk-hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.vk-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--vk-muted);
  background: rgba(26, 35, 50, 0.65);
  border: 1px solid var(--vk-border);
}

.vk-pill i {
  color: var(--vk-accent);
  font-size: 0.95rem;
}

.vk-card--hero-panel {
  background: linear-gradient(155deg, rgba(26, 35, 50, 0.92), rgba(36, 48, 68, 0.88));
  border-color: rgba(45, 212, 191, 0.22);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.vk-checklist {
  list-style: none;
  padding: 0;
  margin: 0;
}

.vk-checklist li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.35rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  font-size: 0.88rem;
  color: var(--vk-muted);
  line-height: 1.45;
}

.vk-checklist li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.vk-checklist li:first-child {
  padding-top: 0;
}

.vk-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--vk-accent);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.15);
}

.vk-checklist li:first-child::before {
  top: 0.2rem;
}

.vk-checklist strong {
  color: var(--vk-text);
  font-weight: 600;
}

.vk-section-alt {
  background: rgba(26, 35, 50, 0.35);
  border-block: 1px solid var(--vk-border);
}

.vk-section-lead {
  color: var(--vk-muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

.vk-card--feature {
  height: 100%;
}

.vk-feature-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--vk-surface-2);
  color: var(--vk-accent);
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.vk-mini-card {
  height: 100%;
  padding: 1.15rem 1.2rem;
  border-radius: var(--vk-radius);
  background: rgba(26, 35, 50, 0.55);
  border: 1px solid var(--vk-border);
  transition: border-color 0.2s ease;
}

.vk-mini-card:hover {
  border-color: rgba(45, 212, 191, 0.28);
}

.vk-mini-card__ico {
  color: var(--vk-accent);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  display: block;
}

.vk-steps .vk-step {
  padding: 1.25rem 1.35rem;
  border-radius: var(--vk-radius);
  border: 1px solid var(--vk-border);
  background: rgba(15, 20, 25, 0.45);
  height: 100%;
}

.vk-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.95rem;
  color: #042f2e;
  background: linear-gradient(135deg, var(--vk-accent), var(--vk-accent-dim));
  margin-bottom: 0.85rem;
}

.vk-faq .accordion-item {
  background: rgba(26, 35, 50, 0.5);
  border: 1px solid var(--vk-border);
  color: var(--vk-text);
}

.vk-faq .accordion-item + .accordion-item {
  margin-top: 0.5rem;
}

.vk-faq .accordion-button {
  background: transparent;
  color: var(--vk-text);
  font-weight: 600;
  box-shadow: none;
}

.vk-faq .accordion-button:not(.collapsed) {
  color: var(--vk-accent);
  background: rgba(45, 212, 191, 0.06);
}

.vk-faq .accordion-button::after {
  filter: invert(1) brightness(1.15);
  opacity: 0.65;
}

.vk-faq .accordion-button:not(.collapsed)::after {
  opacity: 0.95;
}

.vk-faq .accordion-body {
  color: var(--vk-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  padding-top: 0;
}

.vk-cta-band {
  background: linear-gradient(120deg, rgba(45, 212, 191, 0.12), rgba(59, 130, 246, 0.08));
  border-top: 1px solid var(--vk-border);
}

.vk-cta-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: stretch;
  padding: 1.75rem 1.5rem;
  border-radius: var(--vk-radius);
  border: 1px solid rgba(45, 212, 191, 0.22);
  background: rgba(15, 20, 25, 0.55);
}

@media (min-width: 992px) {
  .vk-cta-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.vk-cta-inner__muted {
  color: var(--vk-muted);
}

/* Inner content pages */
body.vk-page {
  margin: 0;
  min-height: 100vh;
  font-family: var(--vk-font);
  background: var(--vk-bg);
  color: var(--vk-text);
}

.vk-page-main {
  padding: 2.5rem 0 4rem;
}

.vk-page-main h1 {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.vk-page-main .vk-prose {
  color: var(--vk-muted);
  line-height: 1.7;
  max-width: 720px;
}

.vk-page-main .vk-prose h2 {
  color: var(--vk-text);
  font-size: 1.25rem;
  margin-top: 2rem;
}

.vk-page-main .vk-prose a {
  color: var(--vk-accent);
}