/* Signalist — Tema: AMOLED Black, Amber #FFB100, SOS Red. Mobil öncelikli. */
:root {
  --bg: #000000;
  --surface: #1A1A1A;
  --accent: #FFB100;
  --accent-dim: rgba(255, 177, 0, 0.4);
  --amber-morse: #b36b00;
  --sos-red: #ff0000;
  --text: #FFFFFF;
  --text-dim: rgba(255, 255, 255, 0.6);
  --primary20: rgba(255, 177, 0, 0.2);
  --primary10: rgba(255, 177, 0, 0.1);
  --radius: 4px;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Tipografi */
h1, h2, h3, .font-mono {
  font-family: var(--font-mono);
}

h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); font-weight: 700; letter-spacing: 0.05em; }
h2 { font-size: clamp(1.25rem, 3vw, 1.5rem); font-weight: 600; color: var(--accent); }
h3 { font-size: 1.125rem; font-weight: 600; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s, opacity 0.2s;
}
a:hover { color: #ffc233; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 768px) {
  .container { padding: 0 2rem; }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.92);
  border-bottom: 1px solid var(--primary20);
  backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 1rem;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
}

.logo-wrap:hover { color: var(--text); opacity: 0.9; }

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
}

.site-title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0;
}

/* Nav */
.nav-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  color: var(--text-dim);
  border-radius: var(--radius);
}
.nav-list a:hover { color: var(--accent); background: var(--primary10); }

/* Dil seçici */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.lang-switcher button {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.5rem;
  background: var(--surface);
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}
.lang-switcher button:hover { color: var(--text); background: var(--primary10); }
.lang-switcher button[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--primary10);
}

/* Hero */
.hero {
  padding: 3rem 0 4rem;
  text-align: center;
}

.hero-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto 1.5rem;
  border-radius: 20px;
}

.hero .morse-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-dim);
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.hero h1 { margin: 0 0 0.5rem; }
.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-dim);
  max-width: 480px;
  margin: 0 auto 2rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover { background: #ffc233; }

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
}
.btn-outline:hover { background: var(--primary10); }

.btn-sos {
  background: transparent;
  color: var(--sos-red);
  border: 1px solid var(--sos-red);
}
.btn-sos:hover { background: rgba(255, 0, 0, 0.1); }

/* Bölümler */
.section {
  padding: 3rem 0;
  border-top: 1px solid var(--primary10);
}

.section-title {
  margin: 0 0 1.5rem;
  text-align: center;
}

.feature-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 640px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--primary10);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}
.feature-card:hover { border-color: var(--accent-dim); }

.feature-card h3 { margin: 0 0 0.5rem; }
.feature-card p { margin: 0; color: var(--text-dim); font-size: 0.95rem; }

/* Sayfa başlığı (iç sayfalar) */
.page-hero {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--primary10);
}
.page-hero h1 { margin: 0 0 0.25rem; }
.page-hero p { margin: 0; color: var(--text-dim); }

/* İçerik blokları */
.content-block {
  padding: 2rem 0 3rem;
}
.content-block h2 { margin: 1.5rem 0 0.75rem; }
.content-block h3 { margin: 1.25rem 0 0.5rem; }
.content-block p { margin: 0 0 1rem; color: var(--text-dim); }
.content-block ul, .content-block ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
  color: var(--text-dim);
}

/* Footer */
.site-footer {
  margin-top: auto;
  padding: 2rem 0;
  border-top: 1px solid var(--primary10);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.site-footer a { color: var(--accent); }
.footer-links { margin: 0.5rem 0; }
.footer-links a { margin: 0 0.5rem; }

/* Mobil menü (opsiyonel) */
@media (max-width: 599px) {
  .nav-list { gap: 0.25rem; }
  .nav-list a { padding: 0.4rem 0.5rem; font-size: 0.85rem; }
  .lang-switcher button { padding: 0.3rem 0.4rem; font-size: 0.7rem; }
  .hero { padding: 2rem 0 3rem; }
  .section { padding: 2rem 0; }
}

/* Utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* CRT hafif efekt (opsiyonel) */
.terminal-line {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-dim);
}