:root {
  --main-color: #ffff73;
  --bg-color: #141517;
  --text-color: #f7f7f7;
  --border-color: rgba(255, 255, 255, 0.08);
  --card-bg: #1a1a1a;
  --font-main: 'Poppins', sans-serif;
}

/* GENEL FONT AYARI */
body {
  font-family: var(--font-main);
  color: var(--text-color);
  background: var(--bg-color);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.content {
  padding: 15px 0;
}

.container {
  width: 1030px;
  margin: auto;
  padding: 10px 0;
}

.fl { float: left; }
.fr { float: right; }
.clear { clear: both; }

.img-responsive {
  width: 100%;
  height: auto;
}

.bg-gray {
  background: linear-gradient(0deg, #1d1d1d 0%, var(--bg-color) 100%);
}

.p10 { padding: 10px; }
.text-center { text-align: center; }
.w40 { width: 45%; margin-left: 5%; }

/* ======== HEADER ======== */
header {
  position: fixed;
  z-index: 10;
  width: 100%;
  left: 0;
  top: 0;
  background: rgba(20, 21, 23, 0.95);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

header a {
  color: var(--main-color);
  text-decoration: none;
  font-weight: bold;
  line-height: 32px;
  transition: color 0.3s ease;
}

header a:hover {
  color: #f7f7b0;
}

/* ======== İÇERİK ======== */
.app-icon {
  margin-top: 50px;
  box-shadow: 0px 0px 8px rgba(255, 255, 115, 0.1);
  border-radius: 16px;
  background: var(--card-bg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-icon:hover {
  transform: scale(1.03);
  box-shadow: 0px 0px 15px rgba(255, 255, 115, 0.15);
}

h1 {
  font-size: 36px;
  margin-top: 25px;
  color: var(--text-color);
}

#how-to h1 {
  margin-top: 30px;
}

.content-text {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-color);
  opacity: 0.9;
}

.scene {
  background: linear-gradient(0deg, #1b1b1b 0%, var(--bg-color) 100%);
  width: 100%;
  padding: 15px 0;
}

.logo {
  background: url(../images/logolar/logo.png) no-repeat center;
  background-size: contain;
  display: block;
  width: 150px;
  height: 40px;
  text-indent: -99999px;
}

/* ======== BUTONLAR ======== */
.download-buttons a {
  background-color: #1a1a1a;
  display: inline-block;
  padding: 10px 10px 10px 50px;
  line-height: 16px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-color);
  text-decoration: none;
  border: 1px solid var(--main-color);
  transition: all 0.3s ease;
}

.download-buttons a:hover {
  background-color: #0f0f11;
  border-color: #f7f7b0;
  border-bottom-width: 2px;
  transform: translateY(-2px);
}

.download-buttons a small {
  font-size: 18px;
  display: block;
  color: var(--main-color);
}

.download-buttons a.btn-iphone {
  background-image: url(../images/logolar/apple-logo.png);
  background-size: 30px auto;
  background-position: 10px center;
  background-repeat: no-repeat;
  margin-right: 10px;
}

.download-buttons a.btn-android {
  background-image: url(../images/logolar/playstore-logo.png);
  background-size: 30px auto;
  background-position: 10px center;
  background-repeat: no-repeat;
}

/* ======== TABLAR ======== */
#steps-btn {
  margin: 15px auto;
  display: block;
  text-align: center;
}

#steps-btn a {
  margin: 0;
  padding: 5px 5px;
  text-decoration: none;
  color: var(--text-color);
  border-radius: 3px;
}

#steps-btn a.active {
  color: var(--main-color);
  font-weight: bold;
  border-bottom: 3px solid var(--main-color);
}

.tabpanels ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tabpanels ul li {
  list-style: none;
  margin: 10px;
  padding: 10px;
  width: 300px;
  min-height: 265px;
  float: left;
  border-radius: 8px;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  background-color: var(--card-bg);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.tabpanels ul li:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 15px rgba(255, 255, 115, 0.08);
}

.tabpanels ul li h3 {
  margin: 5px 0 15px 10px;
  color: #dddddd;
}

.tabpanels ul li p {
  margin: 0 10px 15px 10px;
  line-height: 20px;
}

.tabpanels ul li img {
  width: 100%;
  height: auto;
  border: 1px solid #2f2f2f;
  border-radius: 5px;
  margin-bottom: 10px;
}

.tabpanels ul li span {
  color: var(--main-color);
  font-weight: bold;
}

/* ======== FOOTER ======== */
.footnote {
  padding: 20px 0;
  color: #bdbdbd;
  font-size: 15px;
}

.footnote a {
  color: #bdbdbd;
  text-decoration: none;
}

.footnote a:hover {
  color: var(--main-color);
}

/* ======== POPUP ======== */
.popup {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(12px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.popup-content {
  background: #1a1a1a;
  max-width: 500px;
  width: 90%;
  margin: auto;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.4);
}

.close-btn {
  background: #2d2d2d;
  color: var(--text-color);
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 15px;
  transition: background 0.3s ease;
}

.close-btn:hover {
  background: #444;
}

/* ======== MOBİL ======== */
@media (max-width: 768px) {
  body {
    overflow-x: hidden;
    padding: 30px 0 0 0;
  }

  .content {
    padding: 35px 0;
  }

  .container {
    width: auto;
    padding: 20px 10px;
  }

  .fl, .fr { float: none; }

  .w40, .w60 { width: auto; }

  .img-responsive {
    width: 120%;
    height: auto;
    margin-left: -10%;
  }

  header .container {
    width: auto;
    padding: 10px 15px;
  }

  .logo {
    width: 85px;
    height: 29px;
    margin-top: 8px;
  }

  .app-icon {
    margin-top: 0;
  }

  h1 {
    font-size: 28px;
    line-height: 30px;
  }

  .tabpanels ul li {
    width: 92%;
    padding: 4%;
    margin: 0 0 16px 0;
    min-height: auto;
  }

  .content-text { width: 100%; }
}
/* ======== FOOTER ======== */
.site-footer {
  background: transparent; /* tamamen şeffaf */
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
  padding: 35px 10px 25px 10px;
  color: var(--text-color);
  font-size: 15px;
}

.footer-social {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-bottom: 12px;
}

.footer-social a {
  font-size: 18px;
  color: var(--text-color);
  opacity: 0.85;
  transition: color 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
}

.footer-social a:hover {
  color: var(--main-color);
  transform: translateY(-3px);
  opacity: 1;
}

.footer-copy {
  font-size: 14px;
  color: #cfcfcf;
  margin-top: 8px;
}

/* ======== MOBİL FOOTER ======== */
@media (max-width: 768px) {
  .site-footer {
    background: transparent; /* mobilde de aynı */
    padding: 25px 10px;
  }

  .footer-social {
    gap: 28px;
  }

  .footer-social a {
    font-size: 23px;
  }

  .footer-copy {
    font-size: 13px;
  }
}