:root{
  --bg: #0b1020;
  --panel: rgba(255,255,255,.06);
  --panel2: rgba(255,255,255,.08);
  --text: #e8eefc;
  --muted: rgba(232,238,252,.70);
  --line: rgba(255,255,255,.10);

  --shadow: 0 20px 60px rgba(0,0,0,.35);
  --shadow2: 0 26px 80px rgba(0,0,0,.45);

  --radius: 16px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 15% 10%, rgba(124,92,255,.35), transparent 60%),
    radial-gradient(700px 450px at 80% 25%, rgba(34,197,94,.20), transparent 60%),
    linear-gradient(180deg, #060912 0%, var(--bg) 100%);
}

/* TOPBAR */
.topbar{
  position: sticky;
  top:0;
  z-index: 10;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(6,9,18,.75);
  backdrop-filter: blur(10px);
}

.brand{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 999px;
  color: var(--text);
  cursor:pointer;
  transition: .18s ease;
}
.brand:hover{
  background: var(--panel2);
  transform: translateY(-1px);
}

.brand__logo{
  width: 34px; height: 34px;
  display:grid; place-items:center;
  border-radius: 10px;
  background: linear-gradient(135deg, #7c5cff, #2dd4bf);
  font-weight: 900;
}
.brand__text{ font-weight: 750; letter-spacing:.2px; }

/* SEARCH */
.search{
  display:flex;
  align-items:center;
  gap: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 999px;
  padding: 8px 12px;
  min-width: min(560px, 64vw);
}
.search__icon{ opacity:.9; }
.search input{
  flex:1;
  border:0;
  outline:0;
  background: transparent;
  color: var(--text);
  font-size: 14px;
}
.search input::placeholder{ color: rgba(232,238,252,.55); }
.search__clear{
  border:0;
  background: transparent;
  color: rgba(232,238,252,.75);
  font-size: 20px;
  line-height: 1;
  cursor:pointer;
  padding: 0 4px;
}
.search__clear:hover{ color: var(--text); }

/* LAYOUT */
.layout{
  max-width: 1120px;
  margin: 18px auto 44px;
  padding: 0 18px;
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
}

.sectionTitle{
  margin: 10px 0 12px;
  font-size: 16px;
  color: rgba(232,238,252,.92);
}

.grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 14px;
}

.hint{
  margin: 12px 2px 0;
  color: var(--muted);
  font-size: 13px;
}

/* CARD */
.card{
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius);
  overflow:hidden;
  box-shadow: var(--shadow);
  display:flex;
  flex-direction:column;
  min-height: 270px;
  transform: translateZ(0);
  transition: .18s ease;
}
.card:hover{
  background: var(--panel2);
  box-shadow: var(--shadow2);
  transform: translateY(-3px);
}

.cover{
  position:relative;
  aspect-ratio: 3 / 4;
  overflow:hidden;
  background: rgba(255,255,255,.04);
}
.cover img{
  width:100%;
  height:100%;
  object-fit: cover;
  display:block;
  filter: saturate(1.05) contrast(1.05);
  transform: scale(1.02);
  transition: .22s ease;
}
.card:hover .cover img{ transform: scale(1.06); }

.cover::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(180deg, transparent 35%, rgba(0,0,0,.58) 100%);
}

.badge{
  position:absolute;
  left: 10px;
  top: 10px;
  z-index:1;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.14);
  color: rgba(232,238,252,.95);
  backdrop-filter: blur(10px);
}

/* Kapak üstü "Oku" butonu */
.coverBtn{
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 2;

  display:flex;
  align-items:center;
  justify-content:center;
  gap: 10px;

  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(10, 12, 20, .52);
  backdrop-filter: blur(12px);

  color: rgba(255,255,255,.96);
  font-weight: 800;
  cursor: pointer;
  letter-spacing: .2px;

  transform: translateY(10px);
  opacity: 0;
  transition: .18s ease;
}

.coverBtn::before{ content:"▶"; font-size: 12px; opacity: .92; }

.card:hover .coverBtn{
  transform: translateY(0);
  opacity: 1;
}

.coverBtn:hover{
  background: rgba(10, 12, 20, .68);
  border-color: rgba(255,255,255,.22);
  box-shadow: 0 10px 24px rgba(0,0,0,.35), 0 0 0 1px rgba(255,255,255,.10) inset;
}

.cardBody{
  padding: 12px 12px 14px;
  display:flex;
  flex-direction:column;
  gap: 8px;
  flex:1;
}
.cardTitle{ margin:0; font-size: 14px; line-height: 1.28; }
.cardMeta{ margin:0; font-size: 12px; color: var(--muted); }

/* READER */
.reader{
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display:flex;
  flex-direction:column;
  height: calc(100vh - 160px);
}
/* MAKALE SAYFASI TASARIMI */

.articlePage{
  max-width: 820px;
  margin: 36px auto;
  padding: 0 18px 50px;
}

.articleBox{
  border: 1px solid var(--line);
  background: rgba(255,255,255,.06);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.articleBack{
  display:inline-flex;
  margin-bottom: 18px;
  text-decoration:none;
  color: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 700;
}

.articleBack:hover{
  background: rgba(255,255,255,.10);
}

.articleBox h1{
  margin-top: 0;
  font-size: 32px;
  line-height: 1.2;
}

.articleMeta{
  color: var(--muted);
  margin-bottom: 22px;
}

.articleBox p{
  line-height: 1.75;
  color: rgba(232,238,252,.9);
  font-size: 16px;
}

.curriculumText{
  white-space: pre-wrap;
  line-height: 1.75;
  color: rgba(232,238,252,.9);
  font-size: 15.5px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.curriculumText strong{
  color: white;
}