*{
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}
html{
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: hidden;
}
body {
  background: #e0e5ec;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
}
h1 {
  position: relative;
  text-align: center;
  color: #353535;
  font-size: 50px;
  font-family: "Cormorant Garamond", serif;
}

p {
  font-family: 'Lato', sans-serif;
  font-weight: 300;
  text-align: center;
  font-size: 18px;
  color: #676767;
}
.frame {
  width: 90%;
  margin: 40px auto;
  text-align: center;
}
button {
  margin: 20px;
}
.custom-btn {
  width: 130px;
  height: 40px;
  color: #fff;
  border-radius: 5px;
  padding: 10px 25px;
  font-family: 'Lato', sans-serif;
  font-weight: 500;
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  display: inline-block;
   box-shadow:inset 2px 2px 2px 0px rgba(255,255,255,.5),
   7px 7px 20px 0px rgba(0,0,0,.1),
   4px 4px 5px 0px rgba(0,0,0,.1);
  outline: none;
}

/* 16 */
.btn-16 {
  border: none;
  color: #000;
}
.btn-16:after {
  position: absolute;
  content: "";
  width: 0;
  height: 100%;
  top: 0;
  left: 0;
  direction: rtl;
  z-index: -1;
  box-shadow:
   -7px -7px 20px 0px #fff9,
   -4px -4px 5px 0px #fff9,
   7px 7px 20px 0px #0002,
   4px 4px 5px 0px #0001;
  transition: all 0.3s ease;
}
.btn-16:hover {
  color: #000;
}
.btn-16:hover:after {
  left: auto;
  right: 0;
  width: 100%;
}
.btn-16:active {
  top: 2px;
}

h1{
  font-size: 2.5rem;
  font-family: 'Montserrat';
  font-weight: normal;
  color: #444;
  text-align: center;
  margin: 2rem 0;
}

.wrapper{
  width: 100%;
  max-width: min(90rem, 100% - clamp(1.25rem, 4vw, 2.75rem));
  margin: 0 auto;
  padding: clamp(0.25rem, 1.5vw, 0.75rem) 0 clamp(1.75rem, 4vw, 3rem);
}

.certMain{
  width: 100%;
}

.cols{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 268px), 1fr));
  gap: clamp(1rem, 2.2vw, 1.65rem);
  width: 100%;
  padding: clamp(0.25rem, 1vw, 0.75rem) 0 0;
  justify-items: center;
}

.col{
  margin: 0;
  min-width: 0;
  width: 100%;
  max-width: 400px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.container{
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
	-webkit-perspective: 1000px;
	        perspective: 1000px;
}

.front,
.back{
  background-size: cover;
  box-shadow: 0 4px 8px 0 rgba(0,0,0,0.25);
  border-radius: 10px;
	background-position: center;
	-webkit-transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	-o-transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1), -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	-webkit-backface-visibility: hidden;
	        backface-visibility: hidden;
	text-align: center;
	min-height: clamp(240px, 48vw, 300px);
	height: auto;
	border-radius: 10px;
	color: #fff;
	font-size: 1.5rem;
}

.back{
  background: #cedce7;
  background: -webkit-linear-gradient(45deg,  #cedce7 0%,#596a72 100%);
  background: -o-linear-gradient(45deg,  #cedce7 0%,#596a72 100%);
  background: linear-gradient(45deg,  #cedce7 0%,#596a72 100%);
}

.front:after{
	position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    content: '';
    display: block;
    opacity: .6;
    background-color: #000;
    -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
    border-radius: 10px;
}
.container:hover .front,
.container:hover .back,
.col.hover .container .front,
.col.hover .container .back{
    -webkit-transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    -o-transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1), -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
}

.back{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.inner{
    -webkit-transform: translateY(-50%) translateZ(60px) scale(0.94);
            transform: translateY(-50%) translateZ(60px) scale(0.94);
    top: 50%;
    position: absolute;
    left: 0;
    width: 100%;
    padding: 2rem;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    outline: 1px solid transparent;
    -webkit-perspective: inherit;
            perspective: inherit;
    z-index: 2;
}

.container .back{
    -webkit-transform: rotateY(180deg);
            transform: rotateY(180deg);
    -webkit-transform-style: preserve-3d;
            transform-style: preserve-3d;
}

.container .front{
    -webkit-transform: rotateY(0deg);
            transform: rotateY(0deg);
    -webkit-transform-style: preserve-3d;
            transform-style: preserve-3d;
}

.container:hover .back,
.col.hover .container .back{
  -webkit-transform: rotateY(0deg);
          transform: rotateY(0deg);
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}

.container:hover .front,
.col.hover .container .front{
  -webkit-transform: rotateY(-180deg);
          transform: rotateY(-180deg);
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}

.front .inner p{
  font-size: 2rem;
  margin-bottom: 2rem;
  position: relative;
}

.front .inner p:after{
  content: '';
  width: 4rem;
  height: 2px;
  position: absolute;
  background: #C6D4DF;
  display: block;
  left: 0;
  right: 0;
  margin: 0 auto;
  bottom: -.75rem;
}

.front .inner span{
  color: rgba(255,255,255,0.7);
  font-family: 'Montserrat';
  font-weight: 300;
}

/* Kart ön yüzü: global `p` rengi (#676767) burada okunaksız; her temada net kontrast */
.front .inner p{
  color: rgba(255,255,255,.96) !important;
  text-shadow: 0 1px 2px rgba(0,0,0,.55), 0 0 18px rgba(0,0,0,.35);
}
.front .inner span{
  color: rgba(255,255,255,.9) !important;
  text-shadow: 0 1px 2px rgba(0,0,0,.5), 0 0 14px rgba(0,0,0,.3);
}
.front .inner p:after{
  background: rgba(255,255,255,.82);
}

/* --- UI upgrades: theme + header (does not change flip animation selectors) --- */
:root{
  --cert-bg0:#e0e5ec;
  --cert-bg1:#eef2f7;
  --cert-text:#0c1020;
  --cert-muted:rgba(12,16,32,.68);
  --cert-line:rgba(12,16,32,.10);
}

html[data-theme="dark"]{
  --cert-bg0:#05060a;
  --cert-bg1:#0a0f1e;
  --cert-text:#f5f6f7;
  --cert-muted:rgba(245,246,247,.72);
  --cert-line:rgba(255,255,255,.10);
}

html[data-theme="dark"] body{
  background:
    radial-gradient(1100px 800px at 15% -10%, rgba(121,148,255,.18) 0%, rgba(121,148,255,0) 55%),
    radial-gradient(900px 700px at 90% 10%, rgba(255,102,196,.14) 0%, rgba(255,102,196,0) 55%),
    linear-gradient(180deg, var(--cert-bg0), var(--cert-bg1));
}

html[data-theme="light"] body{
  background:
    radial-gradient(1100px 800px at 15% -10%, rgba(64,115,255,.10) 0%, rgba(64,115,255,0) 55%),
    radial-gradient(900px 700px at 90% 10%, rgba(255,64,163,.08) 0%, rgba(255,64,163,0) 55%),
    linear-gradient(180deg, var(--cert-bg0), var(--cert-bg1));
}

html[data-theme="dark"] h1,
html[data-theme="dark"] .pageHeader h1{
  color: color-mix(in srgb, var(--cert-text) 92%, transparent) !important;
}

html[data-theme="light"] h1,
html[data-theme="light"] .pageHeader h1{
  color: color-mix(in srgb, var(--cert-text) 92%, transparent) !important;
}

.pageHeader{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: clamp(12px, 2.5vw, 22px);
  margin: 0 0 clamp(0.75rem, 2vw, 1.25rem);
  padding: clamp(4px, 1vw, 10px) 0 clamp(18px, 2.5vw, 26px);
  border-bottom: 1px solid var(--cert-line);
}
@media screen and (min-width: 52rem){
  .pageHeader{
    align-items: center;
  }
}
.pageHeader h1{
  text-align: left;
  margin: 0;
  font-size: clamp(1.55rem, 2.4vw, 2.35rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.pageHeaderLeft{ min-width: 0; flex: 1 1 12rem; }
.pageHeaderRight{
  display:flex;
  align-items:center;
  gap: clamp(8px, 1.5vw, 12px);
  flex-wrap:wrap;
  justify-content:flex-end;
  flex-shrink: 0;
}
.pageHeaderRight button{
  margin: 0;
}

.iconBtn{
  width:44px;
  height:44px;
  min-width:44px;
  min-height:44px;
  border-radius:999px;
  border:1px solid var(--cert-line);
  background: rgba(255,255,255,.06);
  color: color-mix(in srgb, var(--cert-text) 88%, transparent);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  touch-action: manipulation;
  user-select:none;
}
html[data-theme="light"] .iconBtn{
  background: rgba(255,255,255,.70);
}
html[data-theme="dark"] .iconBtn{
  background: rgba(255,255,255,.12);
  border-color: rgba(255,255,255,.22);
  color: #f5f6f7;
  box-shadow: 0 4px 18px rgba(0,0,0,.25);
}
.iconBtn:hover{
  border-color: color-mix(in srgb, var(--cert-line) 140%, transparent);
}
html[data-theme="dark"] .iconBtn:hover{
  background: rgba(255,255,255,.18);
  border-color: rgba(255,255,255,.32);
}
.iconSun, .iconMoon{ font-size:14px; line-height:1; }
html[data-theme="dark"] .iconMoon{ display:none; }
html[data-theme="light"] .iconSun{ display:none; }

.langWrap{ position:relative; display:inline-flex; align-items:center; }
[dir="rtl"] .langMenu{
  right: auto;
  left: 0;
}
[dir="rtl"] .langMenu button{
  text-align: right;
}
.langMenu{
  position:absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 210px;
  max-height: min(72vh, 420px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px;
  border-radius: 14px;
  border: 1px solid var(--cert-line);
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 50px rgba(0,0,0,.18);
  display:none;
  z-index: 50;
}
html[data-theme="light"] .langMenu{
  background: rgba(255,255,255,.86);
}
html[data-theme="dark"] .langMenu{
  background: rgba(18,22,36,.94);
  border-color: rgba(255,255,255,.14);
  box-shadow: 0 20px 50px rgba(0,0,0,.55);
}
.langWrap.open .langMenu{ display:block; }
.langMenu button{
  width:100%;
  text-align:left;
  border:0;
  background: transparent;
  color: color-mix(in srgb, var(--cert-text) 92%, transparent);
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 10px;
  cursor:pointer;
  font-size: 14px;
}
.langMenu button:hover{ background: rgba(255,255,255,.08); }
html[data-theme="light"] .langMenu button:hover{ background: rgba(12,16,32,.06); }
html[data-theme="dark"] .langMenu button:hover{ background: rgba(255,255,255,.08); }
.langDivider{ height:1px; background: var(--cert-line); margin: 6px 6px; }

/* Karanlık tema: btn-16 (neumorphic) siyah metin + açık gölge koyu zeminde bozuluyor — sade üst çubukta sadeleştir */
html[data-theme="dark"] .pageHeader .custom-btn.btn-16{
  color: #f2f4ff !important;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.2);
  box-shadow: 0 6px 22px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.12);
}
html[data-theme="dark"] .pageHeader .btn-16:after{
  display: none;
}
html[data-theme="dark"] .pageHeader .btn-16:hover{
  color: #fff !important;
  background: rgba(255,255,255,.14);
  border-color: rgba(255,255,255,.28);
}
html[data-theme="dark"] .pageHeader .btn-16:active{
  top: 1px;
}

@media screen and (max-width: 32rem){
  .pageHeader .custom-btn.btn-16{
    min-height: 44px;
    height: auto;
    padding-top: 10px;
    padding-bottom: 10px;
  }
}

/* Dar ekran / tablet portre: açık dil menüsü viewport ortasında */
@media screen and (max-width: 56rem){
  .langWrap.open .langMenu{
    position: fixed;
    left: var(--lm-left, 50%);
    top: var(--lm-top, 72px);
    right: auto;
    bottom: auto;
    transform: translateX(-50%);
    min-width: min(300px, calc(100vw - 32px));
    max-width: calc(100vw - 32px);
    max-height: min(72vh, 440px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 10040;
    box-shadow: 0 28px 80px rgba(0,0,0,.55);
  }
  html[data-theme="light"] .langWrap.open .langMenu{
    box-shadow: 0 28px 70px rgba(0,0,0,.16);
    border-color: rgba(12,16,32,.16);
  }
  html[data-theme="dark"] .langWrap.open .langMenu{
    box-shadow: 0 28px 90px rgba(0,0,0,.7);
  }
  [dir="rtl"] .langWrap.open .langMenu{
    left: var(--lm-left, 50%);
    right: auto;
    transform: translateX(-50%);
  }
}

/* Improve readability on the flipped side */
.back .inner p{
  color: rgba(255,255,255,.92) !important;
  text-shadow: 0 10px 30px rgba(0,0,0,.25);
}
html[data-theme="light"] .back{
  background: linear-gradient(45deg, #eef6ff 0%, #dfe9f7 100%) !important;
}
html[data-theme="light"] .back .inner p{
  color: rgba(12,16,32,.86) !important;
  text-shadow: none;
}

@media screen and (max-width: 48rem){
  .pageHeader{ flex-direction: column; align-items: stretch; }
  .pageHeaderLeft{ flex: 0 0 auto; }
  .pageHeaderRight{
    justify-content: flex-start;
    padding-top: 4px;
  }
  [dir="rtl"] .pageHeaderRight{
    justify-content: flex-end;
  }
  .cols{
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
    gap: 1.1rem;
  }
}

@media screen and (max-width: 32rem){
  .wrapper{
    max-width: 100%;
    padding-left: max(10px, env(safe-area-inset-left));
    padding-right: max(10px, env(safe-area-inset-right));
  }
  .col{ max-width: none; }
  .container{ max-width: none; }
}