/* =============================================================
   shared.css — Tüm sayfalarda ortak stiller
   Kaynak: index.html'den kopyalanan değişkenler + yeni bileşenler
   ============================================================= */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  --bg:           #030712;
  --surface:      #0f172a;
  --surface2:     #1e293b;
  --surface3:     #162032;
  --border:       rgba(100,255,218,0.1);
  --border-hover: rgba(100,255,218,0.35);
  --accent:       #64ffda;
  --accent-dim:   rgba(100,255,218,0.08);
  --accent-glow:  rgba(100,255,218,0.25);
  --purple:       #a78bfa;
  --purple-dim:   rgba(167,139,250,0.08);
  --blue:         #38bdf8;
  --text:         #e2e8f0;
  --text-muted:   #94a3b8;
  --text-dim:     #64748b;
  --font-head:    'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --radius:       12px;
  --radius-lg:    20px;
  --shadow:       0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:    0 8px 48px rgba(0,0,0,0.6);
  --transition:   all 0.35s cubic-bezier(0.4,0,0.2,1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(100,255,218,0.3); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== PAGE TRANSITIONS ===== */
.page-content {
  opacity: 0;
  transition: opacity 0.5s ease;
  padding-top: 64px; /* header yüksekliği kadar boşluk */
}
body.page-loaded .page-content {
  opacity: 1;
}

/* ===== MENU OPEN SCROLL LOCK ===== */
body.menu-open {
  overflow: hidden;
}

/* ===== SHARED HEADER ===== */
.shared-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 64px;
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(3,7,18,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  position: relative;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}
.nav-link:hover { color: var(--accent); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--accent); }
.nav-link.active::after { width: 100%; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ===== LANGUAGE SWITCHER ===== */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  transition: var(--transition);
}
.lang-switch:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 12px var(--accent-glow);
}
.lang-active {
  color: var(--accent);
}
.lang-divider {
  color: var(--text-dim);
  margin: 0 0.1rem;
}
.lang-inactive {
  color: var(--text-dim);
}

/* ===== HAMBURGER MENU ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}
.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== SHARED FOOTER ===== */
#site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 5% 1.5rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}
.footer-tagline {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-social {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.footer-social a {
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-social a:hover {
  color: var(--accent);
}
.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-dim);
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
}

/* ===== MOBILE MENU ===== */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(3,7,18,0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 999;
  }
  .nav-links.mobile-open {
    display: flex;
  }
  .nav-links .nav-link {
    font-size: 1.5rem;
    font-family: var(--font-head);
    font-weight: 600;
  }

  /* Footer responsive */
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-brand {
    flex-direction: column;
  }
}