.social-section {
    text-align: center;
    padding: 80px 0 60px;
    border-top: 1px solid #22304f;
    margin-top: 40px;
}

.social-section p {
    color: #9fb0d1;
    margin-top: 8px;
    font-size: 16px;
}

.social-icons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 25px;
}

.social-icons a {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid #22304f;
    transition: 0.3s;
}

.social-icons a:hover {
    background: #3aa0ff;
    color: #0b1220;
    transform: translateY(-3px);
}

:root {

    --bg: #1a2238;
    /* açık lacivert arka plan */
    --card: #222b45;
    /* biraz daha koyu kart rengi */
    --muted: #b0bdd5;
    /* ikincil metin */
    --text: #ffffff;
    /* beyaz yazı */
    --accent: #3aa0ff;
    /* mavi vurgu */
    --border: #2e3a5b;
    /* sınır çizgisi */

    --radius: 16px;
    --shadow: 0 8px 30px rgba(0, 0, 0, .25);
}

* {
    box-sizing: border-box
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    scroll-behavior: smooth
}

a {
    color: inherit;
    text-decoration: none
}

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

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 16px;
}

/* NAV */
.nav {
    position: sticky;
    top: 0;
    z-index: 101;
    background: rgba(11, 18, 32, .8);
    backdrop-filter: saturate(140%) blur(10px);
    border-bottom: 1px solid var(--border)
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700
}

.brand img {
    height: 40px;
    width: auto;
    border-radius: 8px;
    display: block
}

.menu {
    display: flex;
    gap: 18px
}

.menu a {
    opacity: .9
}

.menu a:hover {
    opacity: 1
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02));
    box-shadow: var(--shadow);
    font-weight: 600
}

.btn:hover {
    transform: translateY(-1px)
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent), #6c7cff);
    border: none;
    color: #0b1220
}

/* MOBILE MENU */
.hamburger {
    background: linear-gradient(150deg, var(--accent), #6c7cff);
    border: none;
    color: #0b1220;
    display: none;
    flex-direction: column;
    gap: 4px;
    position: relative;
    z-index: 101 !important;
    padding: 10px;
    align-items: center;
    justify-content: center;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s ease-in-out;
}
/* Son çizginin altındaki boşluğu kaldır */
.hamburger span:last-child {
  margin-bottom: 0;
}

/* --- Mobil Menü (Başlangıçta Gizli) --- */
.mobile-menu {
  display: none; 
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color:#2e3a5b;
  z-index: 100;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.mobile-menu a {
  display: block;
  padding: 15px;
  font-size: 24px;
  text-decoration: none;
  color: #ffffff;
}
/* --- JavaScript ile Eklenecek "Aktif" Durumları --- */
/* Menü açıldığında (JavaScript bu class'ı ekleyecek) */
.mobile-menu.is-active {
  display: flex; /* Gizli olan menüyü görünür yap */
}

/* Buton 'X'e dönüşsün (JavaScript bu class'ı ekleyecek) */
.hamburger.is-active span:nth-child(1) {
  /* Üst çizgiyi 45 derece döndür ve aşağı kaydır */
  transform: translateY(6px) rotate(45deg);
}
.hamburger.is-active span:nth-child(2) {
  /* Orta çizgiyi gizle */
  opacity: 0;
}
.hamburger.is-active span:nth-child(3) {
  /* Alt çizgiyi -45 derece döndür ve yukarı kaydır */
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width:860px) {
    .menu {
        display: none
    }

    .hamburger {
        display: flex;
    }
}

/* HERO */
.hero {
    padding: 64px 0 32px
}

.hero .wrap {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 28px
}

.hero h1 {
    font-size: 40px;
    line-height: 1.1;
    margin: 12px 0
}

.hero p {
    color: var(--muted);
    font-size: 18px
}

.card {
    background: linear-gradient(180deg, rgba(255, 255, 255, .04), rgba(255, 255, 255, .02));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px
}

.hero .stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 16px
}

.stat {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px;
    text-align: center
}

.stat .n {
    font-size: 22px;
    font-weight: 700
}

.hero-cta {
    display: flex;
    gap: 12px;
    margin-top: 18px;
    flex-wrap: wrap
}

@media (max-width:860px) {
    .hero .wrap {
        grid-template-columns: 1fr
    }
}

/* SECTION */
section {
    padding: 48px 0;
    border-top: 1px solid var(--border)
}

.section-header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    margin-bottom: 20px
}

.section-header h2 {
    margin: 0;
    font-size: 26px
}

.section-header p {
    margin: 6px 0 0;
    color: var(--muted)
}

/* GRID */
.grid {
    display: grid;
    gap: 16px
}

.grid.cols-3 {
    grid-template-columns: repeat(3, 1fr)
}

.grid.cols-2 {
    grid-template-columns: repeat(2, 1fr)
}

@media (max-width:860px) {
    .grid.cols-3 {
        grid-template-columns: 1fr
    }

    .grid.cols-2 {
        grid-template-columns: 1fr
    }
}

.event,
.team-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px
}

.event h3 {
    margin: 0 0 8px
}

.event .meta {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 8px
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, .04);
    font-size: 12px
}

.about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px
}

.about .card ul {
    margin: 0 0 0 18px
}

@media (max-width:860px) {
    .about {
        grid-template-columns: 1fr
    }
}

/* FOOTER */
footer {
    padding: 28px 0;
    border-top: 1px solid var(--border);
    color: var(--muted)
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 16px
}

.footer-grid a {
    color: var(--muted)
}

@media (max-width:860px) {
    .footer-grid {
        grid-template-columns: 1fr
    }
}

/* UTIL */
.mt-0 {
    margin-top: 0
}

.mt-8 {
    margin-top: 8px
}

.mt-12 {
    margin-top: 12px
}

.mt-16 {
    margin-top: 16px
}

.mb-0 {
    margin-bottom: 0
}

.center {
    display: flex;
    align-items: center;
    justify-content: center
}

.dim {
    color: var(--muted)
}

body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 5% 20%, rgba(255, 200, 0, 0.15) 0%, transparent 60%),
        radial-gradient(circle at 95% 80%, rgba(255, 200, 0, 0.1) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}


body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 5% 20%, rgba(255, 200, 0, 0.12) 0%, transparent 60%),
        radial-gradient(circle at 95% 80%, rgba(255, 200, 0, 0.08) 0%, transparent 60%);
    background-size: 200% 200%;
    animation: wireGlowMove 12s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
    filter: blur(25px);
}

body {
    background-color: #0b1220;
    position: relative;
    z-index: 0;
}

/* ARKADA TEK BÜYÜK ŞEFFAF LOGO */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("assets/arkaplan.png");
    background-repeat: no-repeat;
    background-position: center center;
    background-size: 60%;
    /* gerekirse 50% veya 70% dene */
    opacity: 0.05;
    /* logonun saydamlığı */
    z-index: -1;
    pointer-events: none;
}





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