/* ============================================================
   Renk paleti — logodan alınmıştır
   ============================================================ */
:root {
  --red: #c42136;
  --red-dark: #8c1524;
  --black: #000000;
  --dark: #111111;
  --gray: #f5f5f5;
  --white: #ffffff;
  --muted: #9a9a9a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  color: var(--dark);
  background: var(--white);
}

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

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============ POPUP ============ */
.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.popup-overlay.show {
  opacity: 1;
  visibility: visible;
}

.popup {
  position: relative;
  max-width: 520px;
  max-height: calc(100vh - 40px);
  max-height: calc(100svh - 40px);
  width: 100%;
  border-radius: 10px;
  overflow: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  border: 3px solid var(--red);
}

.popup img { width: 100%; }

.popup-close {
  position: absolute;
  top: 8px;
  right: 12px;
  background: var(--red);
  color: var(--white);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
  transition: background 0.2s ease;
}

.popup-close:hover { background: var(--red-dark); }

/* ============ HEADER ============ */
.header {
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}

.logo {
  height: 64px;
  width: auto;
}

.nav a {
  color: var(--dark);
  text-decoration: none;
  margin-left: 28px;
  font-size: 15px;
  letter-spacing: 0.5px;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* ============ SLIDER ============ */
.slider {
  position: relative;
  height: calc(100vh - 84px);
  height: calc(100svh - 84px); /* mobil tarayıcı çubuğu için doğru yükseklik */
  overflow: hidden;
  background: var(--black);
}

.slides, .slide { width: 100%; height: 100%; }

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.slide.active { opacity: 1; }

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.45);
  color: var(--white);
  border: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  z-index: 10;
  transition: background 0.2s ease;
}

.slider-arrow:hover { background: var(--red); }
.slider-arrow.prev { left: 18px; }
.slider-arrow.next { right: 18px; }

@media (hover: none) {
  .slider-arrow:hover { background: rgba(0, 0, 0, 0.45); } /* dokunmatikte yapışan hover olmasın */
}

.slider-dots {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.dot.active {
  background: var(--red);
  transform: scale(1.2);
}

/* ============ GERİ SAYIM ============ */
.countdown {
  background:
    radial-gradient(ellipse 80% 120% at 50% -20%, rgba(196, 33, 54, 0.22), transparent 60%),
    var(--black);
  color: var(--white);
  padding: 72px 0 76px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.countdown-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--red);
  border: 1px solid rgba(196, 33, 54, 0.5);
  border-radius: 100px;
  padding: 7px 18px;
  margin-bottom: 22px;
}

.countdown-title {
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.15;
}

.countdown-sub {
  margin-top: 10px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.5px;
}

.countdown-timer {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: clamp(8px, 2.5vw, 28px);
  margin-top: 44px;
  flex-wrap: nowrap;
}

.time-unit {
  min-width: clamp(64px, 14vw, 130px);
}

.time-num {
  display: block;
  font-size: clamp(40px, 7.5vw, 76px);
  font-weight: 800;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, #ffffff 40%, rgba(255, 255, 255, 0.55));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.time-label {
  display: block;
  margin-top: 12px;
  font-size: clamp(10px, 1.4vw, 13px);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: rgba(255, 255, 255, 0.5);
}

.time-sep {
  font-size: clamp(28px, 5.5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  color: var(--red);
  font-variant-numeric: tabular-nums;
  animation: sep-blink 1s step-end infinite;
}

@keyframes sep-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

@media (prefers-reduced-motion: reduce) {
  .time-sep { animation: none; }
}

/* ============ SPONSORLAR ============ */
.sponsors {
  padding: 64px 0;
  background: var(--gray);
}

.section-title {
  text-align: center;
  font-size: 26px;
  margin-bottom: 40px;
}

.section-title::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  background: var(--red);
  margin: 14px auto 0;
  border-radius: 2px;
}

.sponsors { scroll-margin-top: 100px; }
.sponsor-tier + .sponsor-tier { margin-top: 48px; }

.sponsor-grid {
  --columns: 4;
  --card-height: 138px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  list-style: none;
}

.sponsor-item {
  flex: 0 0 calc((100% - (var(--columns) - 1) * 20px) / var(--columns));
  min-width: 0;
  height: var(--card-height);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 1px solid #e6e6e6;
  border-radius: 12px;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.04);
}

.sponsor-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.tier-badge {
  display: table;
  max-width: 100%;
  margin: 0 auto 24px;
  padding: 10px 24px;
  border-radius: 100px;
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.tier-badge.gold { color: #775516; background: #f5e9c8; }
.tier-badge.silver { color: #505963; background: #e3e6ea; }
.tier-badge.bronze { color: #7f4925; background: #f0dfd1; }
.tier-badge.product { color: #555; background: #fff; border: 1px solid #ddd; }
.sponsor-grid.gold { --columns: 3; --card-height: 170px; }
.sponsor-grid.gold .sponsor-item { border-color: #dfcc96; padding: 24px; }
.sponsor-grid.silver { --columns: 3; --card-height: 148px; }
.sponsor-grid.product { --columns: 3; max-width: 820px; margin: 0 auto; }

/* ============ FOOTER ============ */
.footer {
  background: var(--white);
  color: var(--muted);
  padding: 48px 0;
  border-top: 1px solid #e5e5e5;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

.footer-logo {
  height: 96px;
  width: auto;
}

.footer p { font-size: 13px; letter-spacing: 0.5px; }

/* ============ HAMBURGER MENÜ ============ */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  cursor: pointer;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--dark);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ RESPONSIVE ============ */
/* Tablet ve altı: hamburger menü */
@media (max-width: 820px) {
  .nav-toggle { display: flex; }

  .sponsor-grid { --columns: 3; gap: 14px; }
  .sponsor-grid.gold, .sponsor-grid.product { --columns: 2; }
  .sponsor-item { flex-basis: calc((100% - (var(--columns) - 1) * 14px) / var(--columns)); padding: 16px; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
    display: flex;
    flex-direction: column;
    padding: 8px 0;
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s ease;
  }

  .nav.open {
    transform: scaleY(1);
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    margin: 0;
    padding: 15px 24px;
    font-size: 15px;
    border-top: 1px solid #f0f0f0;
  }

  .nav a:first-child { border-top: none; }

  .logo { height: 54px; }

  .tier-badge { font-size: 11px; padding: 7px 16px; letter-spacing: 2px; }

  .countdown { padding: 48px 0 52px; }
  .countdown-timer { margin-top: 32px; }
  .section-title { font-size: 22px; }
  .sponsors { padding: 48px 0; }
}

/* Mobil: slider poster oranıyla (1920:900) birebir uyumlu olsun —
   tam görsel görünür, ne kırpılır ne siyah boşluk kalır */
@media (max-width: 820px) {
  .slider {
    height: auto;
    aspect-ratio: 1920 / 900;
  }

  .slide img {
    /* posterin tamamı görünsün, kenarlar kırpılmasın */
    object-fit: contain;
    background: var(--black);
  }

  .slider-arrow { width: 40px; height: 40px; }
  .slider-dots { bottom: 10px; }
  .dot { width: 10px; height: 10px; }
}

/* Küçük mobil */
@media (max-width: 480px) {
  .logo { height: 46px; }
  .slider-arrow { width: 36px; height: 36px; font-size: 15px; }
  .slider-arrow.prev { left: 8px; }
  .slider-arrow.next { right: 8px; }
  .sponsor-grid, .sponsor-grid.gold, .sponsor-grid.silver,
  .sponsor-grid.bronze, .sponsor-grid.product { --columns: 2; --card-height: 112px; gap: 12px; }
  .sponsor-item { flex-basis: calc((100% - 12px) / 2); padding: 12px; }
  .sponsor-grid.gold { --card-height: 130px; }
  .sponsor-grid.gold .sponsor-item { padding: 14px; }
  .sponsor-tier + .sponsor-tier { margin-top: 36px; }
  .footer { padding: 36px 0; }
  .footer-logo { height: 72px; }
}

/* Hareket azaltma tercihi */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .slide, .nav, .popup-overlay { transition: none; }
  .time-sep { animation: none; }
}