/* Yankı – Dark theme design system */
:root {
  --yanki-bg: #0f1117;
  --yanki-bg-card: #171822;
  --yanki-bg-elevated: #1e2030;
  --yanki-accent: #3b82f6;
  --yanki-accent-hover: #2563eb;
  --yanki-text: #f1f5f9;
  --yanki-text-muted: #94a3b8;
  --yanki-border: #334155;
  --yanki-footer-bg: #0d0f14;
}

html {
  font-size: 14px;
  position: relative;
  min-height: 100%;
}

@media (min-width: 768px) {
  html { font-size: 16px; }
}

body {
  background: var(--yanki-bg);
  color: var(--yanki-text);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
}

/* Header */
.yanki-header {
  background: var(--yanki-bg-card);
  border-bottom: 1px solid var(--yanki-border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.yanki-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--yanki-text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
}

.yanki-logo-icon {
  width: 28px;
  height: 28px;
  background: var(--yanki-accent);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.yanki-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.yanki-nav a {
  color: var(--yanki-text-muted);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

.yanki-nav a:hover {
  color: var(--yanki-text);
  background: rgba(255,255,255,0.05);
}

/* TR / EN language switcher – rounded dark button */
.yanki-lang {
  display: inline-flex;
  align-items: center;
  background: var(--yanki-bg-elevated);
  border: 1px solid var(--yanki-border);
  border-radius: 999px;
  padding: 0.25rem 0.5rem;
  overflow: hidden;
}

.yanki-lang form {
  display: flex;
  align-items: center;
  gap: 0;
}

.yanki-lang select {
  background: transparent;
  border: none;
  color: var(--yanki-text);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  font-size: 0.875rem;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  padding-right: 1.5rem;
}

.yanki-lang select:focus {
  outline: none;
}

.yanki-lang select option {
  background: var(--yanki-bg-card);
  color: var(--yanki-text);
}

/* Primary CTA button */
.yanki-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--yanki-accent);
  color: #fff;
  padding: 0.6rem 1.25rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.yanki-btn-primary:hover {
  background: var(--yanki-accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

/* App download buttons */
.yanki-btn-apple {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--yanki-accent);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s, transform 0.15s;
}

.yanki-btn-apple:hover {
  background: var(--yanki-accent-hover);
  color: #fff;
  transform: translateY(-2px);
}

.yanki-btn-android {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--yanki-text);
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  border: 2px solid var(--yanki-border);
  text-decoration: none;
  font-weight: 600;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
}

.yanki-btn-android:hover {
  border-color: var(--yanki-accent);
  color: var(--yanki-text);
  background: rgba(59, 130, 246, 0.08);
  transform: translateY(-2px);
}

/* Main content */
.yanki-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* Cards */
.yanki-card {
  background: var(--yanki-bg-card);
  border: 1px solid var(--yanki-border);
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2rem;
}

.yanki-card h1, .yanki-card h2 {
  color: var(--yanki-text);
  margin-top: 0;
}

.yanki-text-muted {
  color: var(--yanki-text-muted);
}

.yanki-legal-text,
.yanki-about-text,
.yanki-support-text {
  white-space: pre-wrap;
  color: var(--yanki-text-muted);
  line-height: 1.7;
}

/* Footer */
.yanki-footer {
  background: var(--yanki-footer-bg);
  border-top: 1px solid var(--yanki-border);
  padding: 3rem 2rem 1.5rem;
  margin-top: auto;
}

.yanki-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .yanki-footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.yanki-footer-brand .yanki-logo {
  margin-bottom: 0.75rem;
}

.yanki-footer-brand p {
  color: var(--yanki-text-muted);
  font-size: 0.9rem;
  max-width: 280px;
}

.yanki-footer h4 {
  color: var(--yanki-text);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.yanki-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.yanki-footer ul li {
  margin-bottom: 0.5rem;
}

.yanki-footer a {
  color: var(--yanki-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

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

.yanki-footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--yanki-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.yanki-footer-bottom p,
.yanki-footer-bottom a {
  color: var(--yanki-text-muted);
  font-size: 0.85rem;
}

/* Hero */
.yanki-hero {
  padding: 4rem 0 5rem;
  text-align: left;
}

.yanki-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--yanki-text);
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.yanki-hero .yanki-hero-highlight {
  color: var(--yanki-accent);
}

.yanki-hero .yanki-hero-lead {
  font-size: 1.2rem;
  color: var(--yanki-text-muted);
  max-width: 560px;
  margin-bottom: 2rem;
}

.yanki-hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Form in dark theme */
.yanki-form .form-control,
.yanki-form input,
.yanki-form textarea {
  background: var(--yanki-bg-elevated);
  border: 1px solid var(--yanki-border);
  color: var(--yanki-text);
  border-radius: 10px;
  padding: 0.75rem 1rem;
}

.yanki-form .form-control:focus,
.yanki-form input:focus,
.yanki-form textarea:focus {
  border-color: var(--yanki-accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  outline: none;
}

.yanki-form label {
  color: var(--yanki-text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.35rem;
}

.yanki-alert-success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #86efac;
  padding: 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
}

.yanki-alert-danger {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  padding: 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
}

/* Override Bootstrap if loaded */
.bg-light, .bg-white { background: var(--yanki-bg-card) !important; }
.text-dark { color: var(--yanki-text) !important; }
.text-muted { color: var(--yanki-text-muted) !important; }