/* ——— RlayHub — premium dark / brand purple ——— */
  @font-face {
    font-family: "Clash Display";
    src: url("../assets/fonts/ClashDisplay-Extralight.otf") format("opentype");
    font-weight: 200;
    font-style: normal;
    font-display: swap;
  }

  @font-face {
    font-family: "Clash Display";
    src: url("../assets/fonts/ClashDisplay-Light.otf") format("opentype");
    font-weight: 300;
    font-style: normal;
    font-display: swap;
  }

  @font-face {
    font-family: "Clash Display";
    src: url("../assets/fonts/ClashDisplay-Regular.otf") format("opentype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
  }

  @font-face {
    font-family: "Clash Display";
    src: url("../assets/fonts/ClashDisplay-Medium.otf") format("opentype");
    font-weight: 500;
    font-style: normal;
    font-display: swap;
  }

  @font-face {
    font-family: "Clash Display";
    src: url("../assets/fonts/ClashDisplay-Semibold.otf") format("opentype");
    font-weight: 600;
    font-style: normal;
    font-display: swap;
  }

  @font-face {
    font-family: "Clash Display";
    src: url("../assets/fonts/ClashDisplay-Bold.otf") format("opentype");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
  }

  @font-face {
    font-family: "Clash Display";
    src: url("../assets/fonts/ClashDisplay-Bold.otf") format("opentype");
    font-weight: 800;
    font-style: normal;
    font-display: swap;
  }

  :root {
    --bg: #050505;
    --bg-elevated: #0c0c0c;
    --charcoal: #141210;
    --brand: #560bad;
    --brand-bright: #7028d9;
    --brand-dark: #430886;
    --brand-icon: #9333ea;
    --heading: #c084fc;
    --gold: var(--brand);
    --gold-bright: var(--brand-bright);
    --bronze: var(--brand-dark);
    --beige: #c4b8a5;
    --text: #f5f0e8;
    --text-muted: rgba(245, 240, 232, 0.55);
    --border: rgba(147, 51, 234, 0.22);
    --glow: rgba(112, 40, 217, 0.12);
    --radius-lg: 22px;
    --radius-md: 14px;
    --radius-pill: 999px;
    --font: "Poppins", system-ui, sans-serif;
    --font-display: "Clash Display", system-ui, sans-serif;
    --header-h: 76px;
    --hero-mask-url: url("../assets/hero-mask-alpha.png");
    --hero-mask-size: 96% 78%;
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  /* Touch cihazlarda ScrollTrigger scrub ile uyum (özellikle iOS) */
  @media (max-width: 768px) {
    html {
      scroll-behavior: auto;
    }
  }

  body {
    margin: 0;
    font-family: var(--font);
    font-size: 1.05rem;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  body.modal-open {
    overflow: hidden;
  }

  .form-honeypot {
    position: absolute !important;
    left: -9999px !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }

  .form-toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translate(-50%, 120%);
    z-index: 10001;
    padding: 0.85rem 1.25rem;
    border-radius: 999px;
    background: rgba(20, 18, 16, 0.95);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 0.95rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    transition: transform 0.35s ease, opacity 0.35s ease;
    opacity: 0;
    max-width: min(92vw, 420px);
    text-align: center;
  }

  .form-toast.is-visible {
    transform: translate(-50%, 0);
    opacity: 1;
  }

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

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

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

  .container {
    width: min(1180px, 92vw);
    margin-inline: auto;
  }

  .container--narrow {
    width: min(720px, 92vw);
  }

  /* ——— Header ——— */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1100;
    padding: 14px 20px;
    pointer-events: none;
  }

  .site-header > * {
    pointer-events: auto;
  }

  .header-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.25rem;
    min-height: 72px;
    padding: 9px 10px;
    background: rgba(8, 8, 8, 0.55);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45);
  }

  .site-header.is-scrolled .header-inner {
    background: rgba(5, 5, 5, 0.72);
    border-color: rgba(147, 51, 234, 0.32);
  }

  .logo {
    display: inline-flex;
    align-items: center;
    line-height: 0;
  }

  .logo img {
    display: block;
    width: auto;
    height: 35px;
    object-fit: contain;
  }

  .nav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.95rem;
    font-family: var(--font-display);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.03em;
  }

  .nav a {
    color: var(--text-muted);
    transition: color 0.25s ease;
  }

  .nav a:hover {
    color: var(--text);
  }

  .nav__cta-mobile {
    display: none;
  }

  .btn-header {
    flex-shrink: 0;
  }

  /* Dil + Kayıt + hamburger tek blokta (mobilde TR|EN ve ☰ yan yana) */
  .header-end {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    flex-wrap: nowrap;
  }

  .lang-switch {
    display: inline-flex;
    align-items: stretch;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.04);
  }

  .lang-switch__btn {
    padding: 0.5rem 0.72rem;
    min-width: 2.5rem;
    font-family: var(--font);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease;
  }

  .lang-switch__btn + .lang-switch__btn {
    border-left: 1px solid rgba(86, 10, 173, 0.22);
  }

  .lang-switch__btn.is-active {
    color: var(--gold-bright);
    background: rgba(112, 40, 217, 0.1);
  }

  .lang-switch__btn:hover:not(.is-active) {
    color: var(--text);
  }

  .lang-switch__btn:focus-visible {
    outline: 2px solid rgba(112, 40, 217, 0.45);
    outline-offset: 2px;
    z-index: 1;
  }

  .nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
  }

  .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    margin: 0 auto;
    background: var(--gold);
    border-radius: 1px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.72rem 1.6rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.92rem;
    letter-spacing: 0.04em;
    border-radius: var(--radius-pill);
    border: none;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
  }

  .btn-header {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 4px 24px rgba(86, 10, 173, 0.35);
    padding: 0.62rem 1.25rem;
  }

  .btn-header:hover {
    transform: translateY(-1px);
    background: var(--brand-bright);
    box-shadow: 0 8px 32px rgba(112, 40, 217, 0.4);
  }

  .btn-sponsor {
    background: var(--brand);
    color: #fff;
    margin-top: 0.5rem;
    box-shadow: 0 4px 28px rgba(86, 10, 173, 0.3);
  }

  .btn-sponsor:hover {
    transform: translateY(-2px);
    background: var(--brand-bright);
    box-shadow: 0 10px 36px rgba(112, 40, 217, 0.38);
  }

  /* ——— Hero: video sabit; siyah + maske tek “perde” — kaydırınca translateY ile yukarı çekilir ——— */
  .hero-spacer {
    position: relative;
    width: 100%;
    max-width: 100%;
    height: 235vh;
    margin-top: 0;
    background: var(--bg);
    overflow: hidden;
  }

  .hero-pin {
    position: relative;
    width: 100%;
    max-width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 520px;
    overflow: hidden;
    background: #000;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background: #000;
    z-index: 0;
  }

  .hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    min-width: 100%;
    min-height: 100%;
    object-fit: cover;
    object-position: center center;
    z-index: 1;
    background: #000;
    pointer-events: none;
  }

  .hero-shutter {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    will-change: transform;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }

  .hero-top-bottom-matte {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
  }

  .hero-side-matte {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
  }

  .hero-side-matte::before,
  .hero-side-matte::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4.8%;
    background: #000;
  }

  .hero-side-matte::before {
    left: 0;
  }

  .hero-side-matte::after {
    right: 0;
  }

  .hero-top-bottom-matte::before,
  .hero-top-bottom-matte::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 11%;
    background: #000;
  }

  .hero-top-bottom-matte::before {
    top: 0;
  }

  .hero-top-bottom-matte::after {
    bottom: 0;
  }

  .hero-darkplate {
    position: absolute;
    inset: 0;
    z-index: 3;
    background: #000;
    -webkit-mask-image: var(--hero-mask-url);
    -webkit-mask-size: var(--hero-mask-size);
    -webkit-mask-position: center center;
    -webkit-mask-repeat: no-repeat;
    mask-image: var(--hero-mask-url);
    mask-size: var(--hero-mask-size);
    mask-position: center center;
    mask-repeat: no-repeat;
    mask-mode: alpha;
    /* iOS Safari: -webkit-mask-source-type bazen tüm alanı opak gösterir → siyah blok */
    pointer-events: none;
  }

  @media (max-width: 768px) {
    :root {
      --hero-mask-url: url("../assets/hero-mask-mobile.png");
      /* cover kaldırıldı — kırpma yok; masaüstü mantığı, hafif küçük */
      --hero-mask-size: 91% 74%;
    }

    .hero-pin {
      min-height: 0;
      height: 100vh;
      height: 100svh;
      height: 100dvh;
    }

    /* Masaüstü ile aynı kaydırma oranı (235vh) */
    .hero-spacer {
      height: 235vh;
      height: 235svh;
      height: 235dvh;
    }

    /* Masaüstü gibi sabit % matlar; yanlar siyah, kaydırırken genişlik oynamaz */
    .hero-side-matte::before,
    .hero-side-matte::after {
      width: 6%;
    }

    /* İnce üst/alt video şeritlerini kapat; harfi kırpmayacak seviyede tut */
    .hero-top-bottom-matte::before,
    .hero-top-bottom-matte::after {
      height: 12%;
    }

    .hero-darkplate {
      -webkit-mask-position: center center;
      mask-position: center center;
    }

    /*
    * Çizgiler, viewport kenarında değil maske kutusunun üst/alt sınırında görünüyor.
    * Görsel boyutuna dokunmadan bu iki seam noktasını ince siyah bantla kapat.
    */
    .hero-shutter::before,
    .hero-shutter::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      height: 8px;
      background: #000;
      z-index: 5;
      pointer-events: none;
    }

    .hero-shutter::before {
      top: calc(50% - 37.8%);
      height: 12px;
    }

    .hero-shutter::after {
      top: calc(50% + 37%);
    }

    /* Görsel boyutuna dokunmadan sadece üst/alt ince video sızıntı çizgilerini kapat */
    .hero-pin::before,
    .hero-pin::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      height: 4px;
      background: #000;
      z-index: 4;
      pointer-events: none;
    }

    .hero-pin::before {
      top: 0;
    }

    .hero-pin::after {
      bottom: 0;
    }
  }

  /* ——— Sections ——— */
  .section {
    position: relative;
    padding: clamp(4.5rem, 10vw, 7rem) 0;
    scroll-margin-top: calc(var(--header-h) + 16px);
  }

  .section-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 4.5vw, 2.85rem);
    text-align: center;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--heading);
    margin: 0 0 0.75rem;
  }

  .section-title--left {
    text-align: left;
    margin-bottom: 1.25rem;
  }

  /* ——— Eğitmenler ——— */
  .trainers-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 1.25rem;
  }

  .section-speakers {
    padding-top: clamp(1.5rem, 4vw, 2.75rem);
  }

  .speakers-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    justify-content: stretch;
  }

  .trainer-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: rgba(12, 12, 12, 0.65);
    border: 1px solid var(--border);
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
    cursor: pointer;
    outline: none;
  }

  .trainer-card:focus-visible {
    box-shadow: 0 0 0 2px rgba(112, 40, 217, 0.28), 0 18px 60px rgba(0, 0, 0, 0.45);
  }

  .trainer-card__img {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: #0a0a0a;
    padding: 10px;
    display: grid;
    place-items: center;
  }

  .trainer-card__img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: contrast(1.05) brightness(0.96);
    transform: none;
  }

  .trainer-card__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 12px 13px;
  }

  .trainer-card__name {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.92rem;
    line-height: 1.2;
  }

  .trainer-card__links {
    display: inline-flex;
    gap: 8px;
    flex-shrink: 0;
  }

  .trainer-link {
    width: 30px;
    height: 30px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(112, 40, 217, 0.25);
    background: rgba(8, 8, 8, 0.5);
    color: var(--gold-bright);
    font-weight: 800;
    font-size: 0.92rem;
    letter-spacing: 0.02em;
  }

  .trainer-link:hover {
    border-color: rgba(112, 40, 217, 0.45);
    background: rgba(112, 40, 217, 0.08);
  }

  /* Modal */
  .trainer-modal {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    place-items: center;
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease;
  }

  .trainer-modal.is-open {
    opacity: 1;
    visibility: visible;
  }

  .trainer-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.76);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
  }

  .trainer-modal__dialog {
    position: relative;
    z-index: 1;
    width: min(1100px, calc(100vw - 24px));
    max-height: min(88vh, 900px);
    overflow: auto;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: radial-gradient(1200px 700px at 75% 20%, rgba(86, 10, 173, 0.16), rgba(12, 12, 12, 0.92) 55%);
    box-shadow: 0 28px 100px rgba(0, 0, 0, 0.65);
    padding: 0;
  }

  .trainer-modal__close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
  }

  .trainer-modal__top {
    display: grid;
    grid-template-columns: minmax(340px, 44%) 1fr;
    gap: 0;
    align-items: start;
  }

  .trainer-modal__photo {
    border-radius: 18px 0 0 18px;
    overflow: hidden;
    border-right: 1px solid rgba(86, 10, 173, 0.18);
    background: #0a0a0a;
    min-height: 520px;
  }

  .trainer-modal__photo img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
  }

  .trainer-modal__head {
    padding: 22px 22px 12px;
    min-width: 0;
  }

  .trainer-modal__name {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.65rem;
    letter-spacing: 0.02em;
  }

  .trainer-modal__role {
    margin: 0.35rem 0 0.75rem;
    color: var(--text-muted);
  }

  .trainer-modal__links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
  }

  .trainer-modal__bio {
    margin: 12px 0 0;
    padding: 0;
    color: rgba(245, 240, 232, 0.85);
    line-height: 1.7;
    white-space: pre-wrap;
  }

  @media (max-width: 900px) {
    .trainers-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .speakers-grid {
      grid-template-columns: repeat(5, minmax(0, 1fr));
    }
  }

  @media (max-width: 640px) {
    .speakers-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }

  @media (max-width: 768px) {
    .trainer-modal__top {
      grid-template-columns: 1fr;
    }

    .trainer-modal__photo {
      border-radius: 18px 18px 0 0;
      border-right: none;
      border-bottom: 1px solid rgba(86, 10, 173, 0.18);
      min-height: 280px;
      max-height: 44vh;
    }

    .trainer-modal__head {
      padding: 18px 16px 10px;
    }

    .trainer-modal__bio {
      padding: 0 16px 16px;
    }
  }

  .section-sub {
    text-align: center;
    color: var(--text-muted);
    max-width: 520px;
    margin: 0 auto 2.5rem;
    font-size: 1rem;
  }

  .section-eyebrow {
    text-align: center;
    font-size: 0.75rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 0 0 1.25rem;
  }

  /* Countdown */
  .section-countdown {
    background: linear-gradient(180deg, #000 0%, var(--bg) 40%);
  }

  .countdown {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(0.75rem, 3vw, 1.5rem);
  }

  .countdown__item {
    min-width: 100px;
    padding: 1.35rem 1.5rem;
    text-align: center;
    border-radius: var(--radius-md);
    background: rgba(20, 18, 16, 0.85);
    border: 1px solid var(--border);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4), 0 12px 40px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .countdown__num {
    display: block;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.75rem, 4vw, 2.35rem);
    line-height: 1;
    color: #fff;
  }

  .countdown__label {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #fff;
    opacity: 0.9;
  }

  .countdown-date {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--heading);
    letter-spacing: 0.06em;
    text-transform: none;
  }

  .countdown-eyebrow {
    font-family: var(--font-display);
    margin-top: 0.5rem;
    margin-bottom: 2.5rem;
    color: var(--brand-icon);
    letter-spacing: 0.2em;
  }

  /* About */
  .about-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 3.5rem);
    align-items: center;
    padding: clamp(2rem, 4vw, 3rem);
    border-radius: var(--radius-lg);
    background: rgba(12, 12, 12, 0.65);
    border: 1px solid var(--border);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }

  .about-card__text {
    color: var(--text-muted);
    margin: 0 0 1.1rem;
  }

  .about-card__media {
    border-radius: calc(var(--radius-lg) - 6px);
    overflow: hidden;
    border: 1px solid rgba(86, 10, 173, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
  }

  .about-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 5 / 6;
  }

  /* Campus */
  .section-campus {
    padding-top: clamp(3.5rem, 8vw, 5.5rem);
  }

  .campus-copy {
    max-width: 980px;
    margin: 0 auto 2rem;
    color: var(--text-muted);
  }

  .campus-copy p {
    margin: 0 0 1rem;
  }

  .campus-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 14px;
  }

  .campus-card {
    margin: 0;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: #0a0a0a;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
  }

  .campus-card img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    cursor: zoom-in;
  }

  .campus-card--top {
    grid-column: span 3;
    aspect-ratio: 16 / 9;
  }

  .campus-card--bottom {
    grid-column: span 4;
    aspect-ratio: 16 / 9;
  }

  /* Kampüs: tıklanınca atlıkarınca (lightbox) */
  .campus-lightbox {
    position: fixed;
    inset: 0;
    z-index: 1250;
    display: grid;
    place-items: center;
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease;
  }

  .campus-lightbox.is-open {
    opacity: 1;
    visibility: visible;
  }

  .campus-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }

  .campus-lightbox__panel {
    position: relative;
    z-index: 1;
    width: min(1100px, 100%);
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }

  .campus-lightbox__close {
    position: absolute;
    top: -6px;
    right: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    display: grid;
    place-items: center;
    z-index: 2;
  }

  .campus-lightbox__close:hover {
    background: rgba(255, 255, 255, 0.12);
  }

  .campus-lightbox__row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(0.35rem, 2vw, 1rem);
    width: 100%;
    min-height: 0;
  }

  .campus-lightbox__figure {
    margin: 0;
    flex: 1;
    min-width: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    max-height: min(78vh, 720px);
  }

  .campus-lightbox__img {
    max-width: 100%;
    max-height: min(78vh, 720px);
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
  }

  .campus-lightbox__nav {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid rgba(112, 40, 217, 0.35);
    background: rgba(12, 12, 12, 0.85);
    color: var(--gold-bright);
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: background 0.2s ease, border-color 0.2s ease;
  }

  .campus-lightbox__nav:hover {
    background: rgba(112, 40, 217, 0.12);
    border-color: rgba(112, 40, 217, 0.55);
  }

  .campus-lightbox__counter {
    margin: 0;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
  }

  @media (max-width: 768px) {
    .campus-lightbox__nav {
      width: 42px;
      height: 42px;
    }

    .campus-lightbox__row {
      gap: 0.25rem;
    }
  }

  /* Sponsorluk Formu */
  .section-sponsorship-form {
    padding-top: 0;
  }

  .sponsor-form-card {
    padding: clamp(1.25rem, 3vw, 2rem);
    border-radius: var(--radius-lg);
    background: rgba(12, 12, 12, 0.65);
    border: 1px solid var(--border);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }

  .sponsor-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 16px;
  }

  .form-field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
  }

  .form-field label {
    font-size: 0.86rem;
    letter-spacing: 0.02em;
    color: var(--text-muted);
  }

  .form-field input,
  .form-field select,
  .form-field textarea {
    width: 100%;
    border: 1px solid rgba(86, 10, 173, 0.25);
    border-radius: 12px;
    background: rgba(8, 8, 8, 0.72);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.95rem;
    padding: 0.72rem 0.85rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .form-field input:focus,
  .form-field select:focus,
  .form-field textarea:focus {
    border-color: rgba(112, 40, 217, 0.55);
    box-shadow: 0 0 0 2px rgba(112, 40, 217, 0.12);
  }

  .form-field textarea {
    min-height: 132px;
    resize: vertical;
  }

  .form-field--full {
    grid-column: 1 / -1;
  }

  .sponsor-form .btn-sponsor {
    margin-top: 1rem;
  }

  .form-consent {
    margin-top: 0.85rem;
    display: grid;
    grid-template-columns: 18px 1fr;
    gap: 0.65rem;
    align-items: start;
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.45;
  }

  .form-consent input[type="checkbox"] {
    margin-top: 0.12rem;
    accent-color: var(--gold);
  }

  /* Iletisim Page */
  .section-contact-page {
    padding-top: clamp(4.5rem, 10vw, 7rem);
  }

  .contact-card {
    display: grid;
    grid-template-columns: 1.06fr 0.94fr;
    gap: clamp(1.4rem, 3vw, 2rem);
    align-items: start;
    padding: clamp(1.2rem, 2.8vw, 1.8rem);
    border-radius: var(--radius-lg);
    background: rgba(12, 12, 12, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  }

  .contact-card__media {
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid rgba(86, 10, 173, 0.24);
  }

  .contact-card__media img {
    width: 100%;
    height: 100%;
    min-height: 420px;
    object-fit: cover;
  }

  .contact-form {
    margin-top: 0.65rem;
    max-width: 560px;
  }

  .contact-form .form-field {
    margin-bottom: 0.8rem;
  }

  .contact-form .form-field label {
    margin-bottom: 0.2rem;
    color: var(--text);
    font-weight: 600;
  }

  .contact-form input {
    border-radius: 999px;
    background: #f2f2f2;
    color: #111;
    border: 1px solid #dedede;
  }

  .contact-form textarea {
    width: 100%;
    margin: 0;
    padding: 0.75rem 1rem;
    border-radius: 14px;
    background: #f2f2f2;
    color: #111;
    border: 1px solid #dedede;
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.5;
    resize: vertical;
    min-height: 120px;
  }

  .contact-form textarea:focus {
    outline: 2px solid rgba(86, 10, 173, 0.45);
    outline-offset: 1px;
  }

  .contact-form .btn-header {
    margin-top: 0.5rem;
  }

  /* Register Modal */
  .register-modal {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    place-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
  }

  .register-modal.is-open {
    opacity: 1;
    visibility: visible;
  }

  .register-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.74);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
  }

  .register-modal__dialog {
    position: relative;
    width: min(520px, calc(100vw - 24px));
    border-radius: 18px;
    border: 1px solid var(--border);
    background: #0c0c0c;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.6);
    padding: 1.15rem 1.15rem 1.3rem;
  }

  .register-modal__title {
    margin: 0 0 0.75rem;
    font-family: var(--font-display);
    color: var(--gold-bright);
    font-size: 1.5rem;
  }

  .register-modal__close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    cursor: pointer;
  }

  .register-form {
    display: grid;
    gap: 0.72rem;
  }

  /* Classes */
  .class-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(1.25rem, 3vw, 2rem);
  }

  .class-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--charcoal);
    border: 1px solid var(--border);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.45s ease, border-color 0.35s ease;
  }

  .class-card:hover {
    transform: translateY(-6px) scale(1.02);
    border-color: rgba(112, 40, 217, 0.45);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), 0 0 40px var(--glow);
  }

  .class-card__img {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
  }

  .class-card__img::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(5, 5, 5, 0.85) 100%);
    pointer-events: none;
  }

  .class-card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .class-card:hover .class-card__img img {
    transform: scale(1.06);
  }

  .class-card__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    margin: 0 1.25rem 0.5rem;
    padding-top: 0.25rem;
    color: var(--gold-bright);
  }

  .class-card__desc {
    flex-grow: 1;
    margin: 0 1.25rem 1rem;
    font-size: 0.95rem;
    color: var(--text-muted);
  }

  .class-card__cta {
    margin: 0 1.25rem 1.25rem;
    text-align: center;
    align-self: stretch;
  }

  /* Stratejik Partnerler */
  .partners-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
    margin-top: 1.25rem;
  }

  .partner-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000000;
    border: 1px solid var(--border);
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
    display: grid;
    place-items: center;
    padding: 18px 20px;
    min-height: 136px;
    transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease, background 0.35s ease;
  }

  a.partner-card {
    color: inherit;
    text-decoration: none;
  }

  a.partner-card:hover {
    transform: translateY(-3px);
    border-color: rgba(112, 40, 217, 0.45);
    background: #000000;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55), 0 0 36px var(--glow);
  }

  a.partner-card:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px rgba(112, 40, 217, 0.28), 0 24px 70px rgba(0, 0, 0, 0.55);
  }

  .partner-card__logo {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
  }

  .partner-card__logo img {
    width: auto;
    max-width: 100%;
    height: auto;
    max-height: 128px;
    object-fit: contain;
    filter: contrast(1.05) brightness(0.98);
  }

  @media (max-width: 1024px) {
    .partners-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }
  }

  @media (max-width: 768px) {
    .partners-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }

  .section-sponsors .partners-grid,
  .section-media-partners .partners-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 220px));
    justify-content: center;
  }

  @media (max-width: 1024px) {
    .section-sponsors .partners-grid,
    .section-media-partners .partners-grid {
      grid-template-columns: repeat(auto-fit, minmax(180px, 200px));
    }
  }

  @media (max-width: 768px) {
    .section-sponsors .partners-grid,
    .section-media-partners .partners-grid {
      grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }
  }

  /* Team */
  .team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(1.5rem, 3vw, 2.25rem);
  }

  .team-member {
    text-align: center;
    transition: transform 0.35s ease;
  }

  .team-member:hover {
    transform: translateY(-4px);
  }

  .team-member__photo {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    margin-bottom: 0.85rem;
    aspect-ratio: 1;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
    transition: box-shadow 0.35s ease, border-color 0.35s ease;
  }

  .team-member:hover .team-member__photo {
    border-color: rgba(112, 40, 217, 0.35);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 28px var(--glow);
  }

  .team-member__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .team-member:hover .team-member__photo img {
    transform: scale(1.04);
  }

  .team-member__name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1rem;
    margin: 0 0 0.25rem;
    color: var(--text);
  }

  .team-member__role {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
  }

  /* FAQ */
  .section-faq {
    background: linear-gradient(180deg, var(--bg) 0%, #080706 100%);
  }

  .faq__item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .faq__q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.35rem 0;
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 500;
    text-align: left;
    color: var(--text);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.25s ease;
  }

  .faq__q::after {
    content: "";
    flex-shrink: 0;
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--gold);
    border-bottom: 2px solid var(--gold);
    transform: rotate(45deg);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    opacity: 0.7;
  }

  .faq__item.is-open .faq__q::after {
    transform: rotate(-135deg);
  }

  .faq__q:hover {
    color: var(--gold-bright);
  }

  .faq__a {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .faq__item.is-open .faq__a {
    grid-template-rows: 1fr;
  }

  .faq__a > * {
    min-height: 0;
    overflow: hidden;
  }

  .faq__a p {
    margin: 0 0 1.25rem;
    padding-right: 2rem;
    color: var(--text-muted);
    font-size: 0.98rem;
  }

  /* Events */
  .events-toggle {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
  }

  .events-toggle__btn {
    padding: 0.65rem 1.85rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .events-toggle__btn:hover {
    border-color: rgba(112, 40, 217, 0.4);
    color: var(--text);
  }

  .events-toggle__btn.is-active {
    background: var(--brand);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 6px 28px rgba(86, 10, 173, 0.35);
  }

  .events-panel__text {
    max-width: 720px;
    margin: 0 auto 2rem;
    text-align: center;
    color: var(--text-muted);
    line-height: 1.75;
  }

  .events-panel__text.is-hidden {
    display: none;
  }

  .events-slider-wrap {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
  }

  .events-slider {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: #0a0a0a;
    touch-action: pan-y;
    -webkit-user-select: none;
    user-select: none;
  }

  .events-slider.is-hidden {
    display: none;
  }

  .events-slider__track {
    display: flex;
    width: 100%;
    transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
  }

  .events-slider__slide {
    flex: 0 0 100%;
    aspect-ratio: 16 / 9;
  }

  .events-slider__slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
  }

  @media (hover: hover) {
    .events-slider:hover .events-slider__slide img {
      transform: scale(1.03);
    }
  }

  .events-slider__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: rgba(5, 5, 5, 0.65);
    backdrop-filter: blur(8px);
    cursor: pointer;
    z-index: 2;
    transition: background 0.25s ease, border-color 0.25s ease;
  }

  .events-slider__nav:hover {
    border-color: var(--gold);
    background: rgba(20, 18, 16, 0.9);
  }

  .events-slider__nav--prev {
    left: 14px;
  }

  .events-slider__nav--prev::after {
    content: "";
    display: block;
    width: 10px;
    height: 10px;
    margin: 0 auto;
    border-left: 2px solid var(--gold);
    border-bottom: 2px solid var(--gold);
    transform: rotate(45deg);
  }

  .events-slider__nav--next {
    right: 14px;
  }

  .events-slider__nav--next::after {
    content: "";
    display: block;
    width: 10px;
    height: 10px;
    margin: 0 auto;
    border-right: 2px solid var(--gold);
    border-top: 2px solid var(--gold);
    transform: rotate(45deg);
  }

  /* CTA */
  .section-cta {
    text-align: center;
    padding-bottom: 5rem;
  }

  .cta-text {
    color: var(--text-muted);
    margin: 0 0 1.5rem;
  }

  /* Footer */
  .site-footer {
    padding: 3rem 0 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .social-row {
    display: flex;
    justify-content: center;
    gap: 1.75rem;
    margin-bottom: 1.25rem;
  }

  .social-link {
    color: var(--text-muted);
    transition: color 0.25s ease, transform 0.25s ease;
  }

  .social-link:hover {
    color: var(--gold-bright);
    transform: translateY(-2px);
  }

  .footer-copy {
    text-align: center;
    font-size: 0.8rem;
    color: rgba(245, 240, 232, 0.35);
    margin: 0;
  }

  /* Back to top */
  .back-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 900;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: rgba(8, 8, 8, 0.75);
    backdrop-filter: blur(10px);
    color: var(--gold);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.35s ease, visibility 0.35s ease, transform 0.35s ease, border-color 0.25s ease;
  }

  .back-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .back-top:hover {
    border-color: var(--gold-bright);
    color: var(--gold-bright);
  }

  /* Reveal on scroll */
  .reveal {
    opacity: 0;
    transform: translateY(28px);
  }

  .reveal.is-inview {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  }

  /* Responsive */
  @media (max-width: 980px) {
    .nav {
      position: fixed;
      inset: 82px 14px auto;
      flex-direction: column;
      padding: 1.05rem;
      background: rgba(8, 8, 8, 0.95);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      opacity: 0;
      visibility: hidden;
      transform: translateY(-8px);
      transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    }

    body.nav-open .nav {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .nav-toggle {
      display: flex;
    }

    .btn-header {
      display: none;
    }

    .header-end {
      gap: 8px;
    }

    .lang-switch__btn {
      padding: 0.42rem 0.58rem;
      min-width: 2.2rem;
      font-size: 0.68rem;
    }

    .nav__cta-mobile {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-top: 0.35rem;
      padding: 0.7rem 1.35rem;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 0.9rem;
      letter-spacing: 0.04em;
      background: var(--brand);
      color: #fff;
    }
  }

  @media (max-width: 1024px) {
    .about-card {
      grid-template-columns: 1fr;
    }

    .about-card__media img {
      aspect-ratio: 16 / 10;
    }

    .class-grid {
      grid-template-columns: 1fr;
    }

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

    .campus-card--top {
      grid-column: span 6;
    }

    .campus-card--bottom {
      grid-column: span 6;
    }

    .sponsor-form-grid {
      grid-template-columns: 1fr;
    }

    .contact-card {
      grid-template-columns: 1fr;
    }

    .contact-card__media img {
      min-height: 300px;
    }
  }

  @media (max-width: 768px) {
    .site-header {
      padding: 10px 10px;
      padding-top: max(10px, env(safe-area-inset-top, 0px));
      /* Sadece .header-inner’da blur vardı; padding şeridi şeffaf → video üstten görünüyordu */
      background: var(--bg);
    }

    .header-inner {
      max-width: calc(100vw - 20px);
      min-height: 64px;
      padding: 9px 10px;
    }

    .logo img {
      height: 30px;
    }

    .nav {
      inset: 78px 10px auto;
      width: auto;
    }

    .countdown__item {
      min-width: calc(50% - 0.75rem);
    }

    .events-slider__nav {
      width: 44px;
      height: 44px;
      min-width: 44px;
      min-height: 44px;
    }

    .events-slider__nav--prev {
      left: 8px;
    }

    .events-slider__nav--next {
      right: 8px;
    }

    .campus-grid {
      grid-template-columns: 1fr;
      gap: 12px;
    }

    .campus-card--top,
    .campus-card--bottom {
      grid-column: span 1;
      aspect-ratio: 16 / 10;
    }

    .contact-form input,
    .contact-form select,
    .contact-form textarea,
    .sponsor-form input,
    .sponsor-form select,
    .sponsor-form textarea {
      font-size: 16px;
    }
  }

  @media (max-width: 480px) {
    .section {
      padding: 3.7rem 0;
    }

    .countdown {
      gap: 0.6rem;
    }

    .countdown__item {
      min-width: calc(50% - 0.6rem);
      padding: 1.1rem 1rem;
    }

    .contact-card,
    .sponsor-form-card,
    .about-card {
      padding: 1rem;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }

    .class-card,
    .team-member,
    .class-card__img img,
    .team-member__photo img {
      transition: none;
    }

    .reveal {
      opacity: 1;
      transform: none;
    }
  }