/* ===================================================================
   MATEMATİK KÖŞESİ — defter (notebook) design system
   Signature: every page is a sheet from a Turkish "kareli" math
   notebook — punched spiral holes down the left gutter, a red ink
   margin rule, and faint blue grid lines on the page itself.
=================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@500;600;700&family=Manrope:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;700&display=swap');

:root{
  --paper:        #FBFAF5;
  --paper-soft:    #F5F2EA;
  --grid-line:    #D7E2EF;
  --ink:          #16314F;
  --ink-soft:     #4C617F;
  --ink-faint:    #8294AC;
  --red-pen:      #D6472D;
  --red-pen-dark: #AE3A23;
  --tab-blue:     #2C6CB8;
  --tab-green:    #2C9A6B;
  --tab-purple:   #7C58A8;
  --tab-amber:    #CE8A20;
  --tab-teal:     #1F8A8C;
  --highlighter:  #FFE07A;
  --hole:         #E7EEF6;
  --hole-shadow:  #C7D5E5;
  --shadow:       0 6px 18px rgba(22,49,79,.08);
  --shadow-lift:  0 14px 30px rgba(22,49,79,.14);
  --radius-s:     8px;
  --radius-m:     14px;
  --radius-l:     22px;
  --gutter-w:     38px;
  --content-max:  1180px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  min-height:100vh;
  font-family:'Manrope',system-ui,sans-serif;
  color:var(--ink);
  background:var(--paper);
  background-image:
    repeating-linear-gradient(var(--paper) 0 27px, var(--grid-line) 27px 28px),
    repeating-linear-gradient(90deg, var(--paper) 0 27px, var(--grid-line) 27px 28px);
  position:relative;
  padding-left:var(--gutter-w);
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
ul{ margin:0; padding:0; }
h1,h2,h3,h4{ font-family:'Caveat',cursive; color:var(--ink); margin:0 0 .25em; line-height:1.05; }
h1{ font-size:clamp(2.4rem,5vw,3.6rem); font-weight:700; }
h2{ font-size:clamp(1.7rem,3.2vw,2.3rem); font-weight:700; }
h3{ font-size:1.5rem; font-weight:600; }
p{ line-height:1.6; color:var(--ink-soft); }
:focus-visible{ outline:3px solid var(--red-pen); outline-offset:2px; border-radius:4px; }
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- spiral notebook gutter (left edge, every page) ---------- */
body::before{
  content:"";
  position:fixed;
  top:0; left:0; bottom:0;
  width:var(--gutter-w);
  background:var(--paper-soft);
  border-right:1px solid var(--grid-line);
  background-image:repeating-linear-gradient(
    var(--paper-soft) 0, var(--paper-soft) 34px,
    transparent 34px, transparent 36px
  );
  z-index:5;
}
body::after{
  content:"";
  position:fixed;
  top:14px; left:0; bottom:0; width:var(--gutter-w);
  background-image:repeating-linear-gradient(
    180deg, transparent 0 16px,
    var(--hole-shadow) 16px 17px,
    var(--hole) 17px 31px,
    transparent 31px 47px
  );
  background-position:0 0;
  z-index:6;
  -webkit-mask-image:radial-gradient(circle 7px at 19px 0, #000 99%, transparent 100%);
  mask-image:radial-gradient(circle 7px at 19px 0, #000 99%, transparent 100%);
  -webkit-mask-repeat:repeat-y;
  mask-repeat:repeat-y;
  -webkit-mask-size:38px 47px;
  mask-size:38px 47px;
}
@media (max-width:640px){
  body{ padding-left:18px; }
  :root{ --gutter-w:18px; }
  body::after{ -webkit-mask-size:18px 38px; mask-size:18px 38px; -webkit-mask-position:0 0; }
}

/* ---------- shared page shell ---------- */
.site{ position:relative; z-index:1; }
.wrap{ max-width:var(--content-max); margin:0 auto; padding:0 24px; }

/* red ink margin rule, like a school notebook page */
.page-sheet{ position:relative; }
.page-sheet::before{
  content:"";
  position:absolute; top:0; bottom:0; left:-500px;
  width:1px; background:var(--red-pen); opacity:.55;
  z-index:0;
}
@media (max-width:640px){ .page-sheet::before{ left:26px; } }

/* ---------- header ---------- */
.header{
  background:var(--paper);
  border-bottom:2px solid var(--ink);
  padding:18px 0 0;
  position:relative;
}
.header-container{
  display:flex; align-items:center; gap:16px;
  max-width:var(--content-max); margin:0 auto; padding:0 24px 16px;
}
.header-container img{ height:58px; width:auto; }
.header-container img.logo-fallback{ display:none; }
.brand-text{ display:flex; flex-direction:column; }
.brand-text h1{ font-size:clamp(1.7rem,4vw,2.3rem); margin:0; }
.brand-text span{ font-family:'Manrope'; font-size:.85rem; color:var(--ink-soft); letter-spacing:.02em; }
.header-container a.brand-link{ display:flex; align-items:center; gap:14px; text-decoration:none; margin-right:auto; }

.navbar{
  display:flex; align-items:flex-end; gap:6px;
  max-width:var(--content-max); margin:0 auto; padding:0 24px;
  flex-wrap:wrap;
}
.navbar .left{ display:none; }
.nav-tab{
  font-family:'Manrope'; font-weight:700; font-size:.95rem;
  text-decoration:none; color:#fff;
  padding:10px 18px 9px;
  border-radius:10px 10px 0 0;
  position:relative; top:1px;
  white-space:nowrap;
}
.nav-tab:nth-of-type(1){ background:var(--tab-amber); }
.nav-tab:nth-of-type(2){ background:var(--tab-blue); }
.nav-tab:nth-of-type(3){ background:var(--tab-green); }
.nav-tab:nth-of-type(4){ background:var(--tab-purple); }
.nav-tab:nth-of-type(5){ background:var(--red-pen); }
.nav-tab:nth-of-type(6){ background:var(--ink); }
.nav-tab:nth-of-type(7){ background:var(--tab-teal); }
.nav-tab:nth-of-type(8){ background:#5C5C9E; }
.nav-tab:nth-of-type(9){ background:#B8485E; }
.nav-tab.active{ filter:brightness(1.12); top:0; box-shadow:var(--shadow); }
.nav-tab:hover{ filter:brightness(1.12); }

.search-bar{ margin-left:auto; }
.search-bar form{ display:flex; }
.search-bar input{
  border:1.5px solid var(--ink-faint); background:#fff;
  border-radius:20px; padding:8px 16px; font-family:'Manrope';
  font-size:.9rem; min-width:170px; color:var(--ink);
}
.search-bar input:focus{ border-color:var(--red-pen); }

.auth-area{ display:flex; align-items:center; gap:8px; margin-left:12px; font-size:.85rem; flex:0 0 auto; }
.auth-greet{ color:var(--ink-soft); white-space:nowrap; font-size:.82rem; }
.auth-link{
  text-decoration:none; color:var(--ink); font-weight:700; background:none;
  border:1.5px solid var(--ink-faint); padding:6px 14px; border-radius:18px; cursor:pointer;
  font-family:'Manrope'; font-size:.8rem; white-space:nowrap;
}
.auth-link:hover{ border-color:var(--red-pen); color:var(--red-pen); }
.auth-link.auth-link-solid{ background:var(--red-pen); border-color:var(--red-pen); color:#fff; }
.auth-link.auth-link-solid:hover{ background:var(--red-pen-dark); color:#fff; }

.menu-toggle{
  display:none;
  flex-direction:column; justify-content:center; align-items:center; gap:4px;
  width:40px; height:40px; flex:0 0 auto;
  border:1.5px solid var(--ink); border-radius:8px; background:#fff;
  cursor:pointer; padding:0;
}
.menu-toggle span{
  display:block; width:18px; height:2px; background:var(--ink); border-radius:1px;
  transition:transform .2s ease, opacity .2s ease;
}
.menu-toggle.is-active span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.menu-toggle.is-active span:nth-child(2){ opacity:0; }
.menu-toggle.is-active span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

@media (max-width:860px){
  .header-container{ padding-bottom:16px; }
  .menu-toggle{ display:flex; }

  .navbar{
    display:none;
    flex-direction:column; align-items:stretch; flex-wrap:nowrap;
    position:absolute; top:100%; left:0; right:0; z-index:50;
    background:var(--paper); border-bottom:2px solid var(--ink);
    padding:6px 24px 18px; gap:8px;
    box-shadow:var(--shadow-lift);
  }
  .navbar.is-open{ display:flex; animation:navDrop .18s ease; }
  .nav-tab{ border-radius:9px; top:0; padding:12px 16px; text-align:center; }
  .search-bar{ width:100%; margin:6px 0 0; }
  .search-bar form{ width:100%; }
  .search-bar input{ width:100%; }
  .auth-area{ width:100%; margin:0; justify-content:center; flex-wrap:wrap; }
}
@keyframes navDrop{ from{ opacity:0; transform:translateY(-6px); } to{ opacity:1; transform:translateY(0); } }
@media (max-width:640px){
  .header-container img{ height:44px; }
}
@media (prefers-reduced-motion: reduce){
  .menu-toggle span{ transition:none; }
  .navbar.is-open{ animation:none; }
}

/* ---------- footer ---------- */
footer{
  margin-top:60px;
  border-top:2px dashed var(--ink-faint);
  position:relative;
}
footer::before{
  content:"✂";
  position:absolute; left:50%; top:-13px; transform:translateX(-50%);
  background:var(--paper); padding:0 10px; color:var(--ink-faint); font-size:1rem;
}
.footer-grid{
  max-width:var(--content-max); margin:0 auto; padding:34px 24px 26px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px;
}
.footer-col h3{ font-family:'Manrope'; font-size:.78rem; text-transform:uppercase; letter-spacing:.08em; color:var(--ink-faint); margin:0 0 10px; }
.footer-col a{ display:block; text-decoration:none; color:var(--ink-soft); font-size:.92rem; margin-bottom:6px; }
.footer-col a:hover{ color:var(--red-pen); }
.footer-col p{ margin:0 0 6px; font-size:.92rem; }
.copyright{ text-align:center; padding:14px 24px 28px; font-size:.82rem; color:var(--ink-faint); }

/* ---------- buttons / chips ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:'Manrope'; font-weight:700; font-size:.92rem;
  padding:10px 20px; border-radius:30px; text-decoration:none;
  background:var(--ink); color:#fff; border:none; cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease;
}
.btn:hover{ transform:translateY(-2px); box-shadow:var(--shadow); }
.btn-red{ background:var(--red-pen); }
.btn-outline{ background:transparent; color:var(--ink); border:1.5px solid var(--ink); }
.btn-outline:hover{ background:var(--ink); color:#fff; }

.chip{
  display:inline-flex; align-items:center; gap:6px;
  font-family:'JetBrains Mono'; font-size:.74rem; font-weight:600;
  padding:5px 11px; border-radius:20px;
  background:#fff; border:1.3px solid var(--grid-line); color:var(--ink-soft);
  text-decoration:none;
}
.chip:hover{ border-color:var(--red-pen); color:var(--red-pen); }
.chip.soon{ color:var(--ink-faint); border-style:dashed; }

.back-button{
  font-family:'Manrope'; font-weight:700; font-size:.85rem;
  background:#fff; border:1.5px solid var(--ink); color:var(--ink);
  padding:8px 16px; border-radius:20px; cursor:pointer; margin:20px 0 4px;
}
.back-button:hover{ background:var(--ink); color:#fff; }

/* ---------- generic cards ---------- */
.card{
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-l);
  box-shadow:var(--shadow); padding:24px;
}

/* ---------- hero / exam ticket countdown ---------- */
.hero-text h2{ font-size:clamp(2.4rem,5vw,3.6rem); font-weight:700; margin:0 0 .25em; line-height:1.05; }
.hero{ padding:46px 0 18px; }
.hero-grid{ display:flex; gap:36px; flex-wrap:wrap; align-items:center; }
.hero-text{ flex:1 1 360px; }
.eyebrow{
  font-family:'JetBrains Mono'; font-size:.78rem; font-weight:700;
  color:var(--red-pen); text-transform:uppercase; letter-spacing:.1em;
  background:var(--highlighter); display:inline-block; padding:3px 10px;
  border-radius:5px; margin-bottom:12px; transform:rotate(-1.5deg);
}
.hero-text p{ font-size:1.05rem; max-width:46ch; }

.ticket{
  flex:1 1 320px; max-width:380px;
  background:#fff; border:2px dashed var(--red-pen); border-radius:var(--radius-l);
  padding:22px 22px 18px; position:relative; box-shadow:var(--shadow-lift);
  transform:rotate(1.1deg);
}
.ticket::before,.ticket::after{
  content:""; position:absolute; width:22px; height:22px; background:var(--paper);
  border:2px dashed var(--red-pen); border-radius:50%; top:50%; transform:translateY(-50%);
}
.ticket::before{ left:-13px; }
.ticket::after{ right:-13px; }
.ticket h2{ font-size:1.4rem; margin-bottom:2px; }
.ticket .ticket-sub{ font-size:.82rem; color:var(--ink-soft); margin-bottom:14px; }
.ticket-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:8px; text-align:center; }
.ticket-grid div{ display:flex; flex-direction:column; }
.ticket-num{ font-family:'JetBrains Mono'; font-weight:700; font-size:1.7rem; color:var(--ink); }
.ticket-label{ font-size:.66rem; color:var(--ink-faint); text-transform:uppercase; letter-spacing:.06em; }
.ticket-date{ margin-top:14px; font-size:.74rem; color:var(--ink-faint); text-align:center; }

/* ---------- quick-link tab cards ---------- */
.quick-links{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; margin:36px 0 8px; }
.quick-card{
  display:flex; flex-direction:column; gap:8px; text-decoration:none; color:var(--ink);
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-l);
  padding:22px 20px; box-shadow:var(--shadow); border-top:6px solid var(--tab-amber);
  transition:transform .15s ease, box-shadow .15s ease;
}
.quick-card:nth-of-type(2){ border-top-color:var(--tab-blue); }
.quick-card:nth-of-type(3){ border-top-color:var(--red-pen); }
.quick-card:nth-of-type(4){ border-top-color:var(--tab-green); }
.quick-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-lift); }
.quick-card .qc-icon{ width:34px; height:34px; }
.quick-card h3{ margin-bottom:0; }
.quick-card p{ font-size:.88rem; margin:0; }

@media (max-width:900px){ .quick-links{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:520px){ .quick-links{ grid-template-columns:1fr; } }

/* ---------- shelves / three-column preview section ---------- */
.shelves{ display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:20px; margin:8px 0 40px; }
.shelf{
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-l);
  padding:20px; box-shadow:var(--shadow); display:flex; flex-direction:column;
}
.shelf-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:10px; }
.shelf-head h3{ margin:0; }
.shelf-tag{ font-family:'JetBrains Mono'; font-size:.68rem; color:#fff; background:var(--ink); padding:3px 8px; border-radius:8px; }
.shelf ul{ list-style:none; display:flex; flex-direction:column; gap:8px; margin-bottom:14px; flex:1; }
.shelf li{ display:flex; align-items:center; gap:8px; font-size:.92rem; }
.shelf li a{ text-decoration:none; color:var(--ink-soft); }
.shelf li a:hover{ color:var(--red-pen); }
.featured-row{
  display:flex; align-items:center; gap:10px;
  background:var(--highlighter); border-radius:10px; padding:8px 10px; font-weight:700;
}
.shelf .btn{ align-self:flex-start; }
@media (max-width:860px){ .shelves{ grid-template-columns:1fr; } }

/* ---------- topic list (grade pages) ---------- */
.intro-line{ font-size:1.05rem; max-width:60ch; }
.topic-list{ list-style:none; margin:26px 0 10px; display:flex; flex-direction:column; gap:10px; }
.topic-row{
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-m);
  padding:14px 18px; display:flex; align-items:center; flex-wrap:wrap; gap:10px 16px;
}
.topic-row .topic-name{
  display:flex; align-items:center; gap:10px; font-weight:700; font-size:1.05rem;
  flex:1 1 220px;
}
.topic-row .topic-name::before{
  content:""; width:11px; height:11px; border-radius:3px; border:2px solid var(--ink-faint);
  flex:0 0 auto;
}
.topic-row:has(.chip:not(.soon)) .topic-name::before{ background:var(--red-pen); border-color:var(--red-pen); }
.topic-row .topic-tests{ display:flex; gap:8px; flex-wrap:wrap; }

/* ---------- worksheet block (sınav hazırlık) ---------- */
.worksheet{
  margin:32px 0; background:var(--paper-soft); border:1.5px dashed var(--ink-faint);
  border-radius:var(--radius-l); padding:22px 22px 18px;
}
.worksheet h3{ margin-bottom:10px; }
.worksheet ul{ list-style:none; display:flex; flex-direction:column; gap:8px; }
.worksheet li a{
  text-decoration:none; color:var(--ink); font-weight:600; font-size:.95rem;
  display:flex; align-items:center; gap:8px;
}
.worksheet li a::before{ content:"📄"; }
.worksheet li a:hover{ color:var(--red-pen); }

/* ---------- games page ---------- */
.filter-bar{ display:flex; flex-wrap:wrap; gap:8px; margin:24px 0; }
.filter-btn{
  font-family:'Manrope'; font-weight:700; font-size:.85rem; cursor:pointer;
  background:#fff; border:1.5px solid var(--ink-faint); color:var(--ink-soft);
  padding:8px 16px; border-radius:20px;
}
.filter-btn.is-active{ background:var(--ink); color:#fff; border-color:var(--ink); }

.featured-game{
  display:flex; gap:20px; align-items:center; flex-wrap:wrap;
  background:#fff; border:2px solid var(--red-pen); border-radius:var(--radius-l);
  padding:20px; margin-bottom:28px; box-shadow:var(--shadow);
}
.featured-game .fg-badge{
  font-family:'JetBrains Mono'; font-size:.7rem; font-weight:700; color:#fff;
  background:var(--red-pen); padding:4px 10px; border-radius:8px; align-self:flex-start;
}
.featured-game .fg-text{ flex:1 1 240px; }
.featured-game .fg-text h3{ margin-bottom:4px; }

.game-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:18px; }
.game{
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-m);
  padding:16px; box-shadow:var(--shadow);
}
.game .hover-target{ font-weight:700; font-size:1.05rem; margin:0 0 6px; }
.game .hover-info{ font-size:.85rem; color:var(--ink-soft); margin-bottom:10px; }
.game iframe{ width:100%; border-radius:10px; border:1px solid var(--grid-line); }
.game[hidden]{ display:none; }

/* ---------- about / hakkımızda ---------- */
.about-card{ max-width:760px; margin:26px 0 40px; }
.about-card p{ font-size:1.13rem; line-height:1.85; margin-bottom:1.1em; color:var(--ink); }

/* ---------- legal / terms page ---------- */
.legal{ max-width:780px; margin:26px 0 50px; }
.legal h1{ font-size:2rem; margin-bottom:6px; }
.legal .legal-title{ font-size:2rem; margin-bottom:6px; font-family:'Caveat',cursive; font-weight:700; }
.legal h2{ font-family:'Manrope'; font-size:1.05rem; font-weight:800; color:var(--ink); margin:30px 0 8px; }
.legal p{ font-size:.95rem; line-height:1.75; }

/* ---------- placeholder card (deneme sayfası) ---------- */
.placeholder-card{
  border:1.5px dashed var(--ink-faint); background:var(--paper-soft);
  border-radius:var(--radius-m); padding:14px 18px; font-size:.85rem; color:var(--ink-soft);
}

main{ padding:6px 24px 10px; max-width:var(--content-max); margin:0 auto; position:relative; z-index:1; }
main > .wrap-inner{ padding-left:30px; }
@media (max-width:640px){ main{ padding:6px 14px 10px; } }

/* ===================================================================
   SINAV MOTORU (exam engine) — testler.html / sinav.html
=================================================================== */

/* test seçim kartları */
.test-card-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:18px; margin:26px 0 10px; }
.test-card{
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-l);
  padding:20px; box-shadow:var(--shadow); display:flex; flex-direction:column; gap:10px;
}
.test-card .tc-top{ display:flex; align-items:center; gap:8px; }
.test-card .grade-chip{
  font-family:'JetBrains Mono'; font-size:.72rem; font-weight:700; color:#fff;
  background:var(--ink); padding:3px 9px; border-radius:8px;
}
.test-card h3{ margin:0; }
.test-card .tc-meta{ font-size:.82rem; color:var(--ink-soft); display:flex; gap:14px; }
.test-card .tc-meta span{ display:flex; align-items:center; gap:5px; }

/* sınav kapağı (start screen) */
.exam-cover{
  max-width:560px; margin:30px auto; background:#fff; border:2px dashed var(--red-pen);
  border-radius:var(--radius-l); padding:30px 28px; text-align:center; box-shadow:var(--shadow-lift);
}
.exam-cover h2{ margin-bottom:6px; }
.exam-cover .cover-meta{ display:flex; justify-content:center; gap:22px; margin:18px 0; font-family:'JetBrains Mono'; font-size:.85rem; color:var(--ink-soft); }
.exam-cover .cover-meta strong{ display:block; font-size:1.3rem; color:var(--ink); font-family:'JetBrains Mono'; }
.exam-cover ul{ text-align:left; list-style:disc; padding-left:20px; margin:18px 0; color:var(--ink-soft); font-size:.9rem; display:flex; flex-direction:column; gap:6px; }

/* sınav üst bilgi çubuğu */
.exam-topbar{
  position:sticky; top:0; z-index:20; background:var(--paper);
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  padding:12px 0; border-bottom:2px solid var(--ink); flex-wrap:wrap;
}
.exam-topbar h3{ margin:0; font-size:1.2rem; }
.exam-progress{ font-family:'JetBrains Mono'; font-size:.85rem; color:var(--ink-soft); }
.exam-timer{
  font-family:'JetBrains Mono'; font-weight:700; font-size:1.15rem;
  background:var(--ink); color:#fff; padding:7px 16px; border-radius:20px;
  display:flex; align-items:center; gap:8px;
}
.exam-timer.low-time{ background:var(--red-pen); animation:pulse 1s infinite; }
@keyframes pulse{ 0%,100%{ transform:scale(1); } 50%{ transform:scale(1.05); } }

/* soru kartı */
.question-card{ margin:26px 0; }
.question-card .q-label{ font-family:'JetBrains Mono'; font-size:.78rem; color:var(--red-pen); font-weight:700; margin-bottom:8px; display:block; }
.question-card h3{ font-family:'Manrope'; font-weight:700; font-size:1.2rem; color:var(--ink); margin-bottom:18px; }
.q-image{ display:block; max-width:100%; max-height:340px; margin:0 0 18px; border:1.5px solid var(--grid-line); border-radius:var(--radius-m); background:#fff; }

.option-list{ list-style:none; display:flex; flex-direction:column; gap:10px; }
.option-row{
  display:flex; align-items:center; gap:12px; cursor:pointer;
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-m);
  padding:13px 16px; transition:border-color .15s ease, background .15s ease;
}
.option-row:hover{ border-color:var(--ink-faint); }
.option-row.selected{ border-color:var(--red-pen); background:#FBEFEC; }
.option-row .opt-letter{
  width:28px; height:28px; flex:0 0 auto; border-radius:50%; border:2px solid var(--ink-faint);
  display:flex; align-items:center; justify-content:center; font-weight:700; font-size:.85rem;
  font-family:'JetBrains Mono'; color:var(--ink-soft);
}
.option-row.selected .opt-letter{ background:var(--red-pen); border-color:var(--red-pen); color:#fff; }
.option-row .opt-text{ font-size:.98rem; }
.option-row input{ position:absolute; opacity:0; pointer-events:none; }

.exam-nav{ display:flex; justify-content:space-between; align-items:center; margin:24px 0; gap:10px; flex-wrap:wrap; }

/* optik cevap formu — answer sheet grid */
.answer-sheet{ margin:30px 0; }
.answer-sheet h4{ font-family:'Manrope'; font-size:.85rem; text-transform:uppercase; letter-spacing:.06em; color:var(--ink-faint); margin-bottom:10px; }
.sheet-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(40px,1fr)); gap:8px; }
.sheet-cell{
  aspect-ratio:1; display:flex; align-items:center; justify-content:center;
  font-family:'JetBrains Mono'; font-size:.8rem; font-weight:700;
  border:1.5px solid var(--grid-line); border-radius:8px; background:#fff; color:var(--ink-soft); cursor:pointer;
}
.sheet-cell.answered{ background:var(--ink); border-color:var(--ink); color:#fff; }
.sheet-cell.current{ outline:2.5px solid var(--red-pen); outline-offset:2px; }

/* sonuç ekranı */
.result-summary{ display:grid; grid-template-columns:repeat(auto-fit,minmax(120px,1fr)); gap:14px; margin:26px 0; }
.result-stat{ background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-m); padding:16px; text-align:center; }
.result-stat .stat-num{ font-family:'JetBrains Mono'; font-weight:700; font-size:1.7rem; color:var(--ink); display:block; }
.result-stat.correct .stat-num{ color:var(--tab-green); }
.result-stat.wrong .stat-num{ color:var(--red-pen); }
.result-stat .stat-label{ font-size:.78rem; color:var(--ink-faint); text-transform:uppercase; letter-spacing:.05em; }

.review-row{
  background:#fff; border:1.5px solid var(--grid-line); border-radius:var(--radius-m);
  padding:14px 18px; margin-bottom:10px;
}
.review-row.is-correct{ border-left:5px solid var(--tab-green); }
.review-row.is-wrong{ border-left:5px solid var(--red-pen); }
.review-row.is-empty{ border-left:5px solid var(--ink-faint); }
.review-row .rr-q{ font-weight:700; margin-bottom:6px; }
.review-row .rr-line{ font-size:.88rem; color:var(--ink-soft); }
.review-row .rr-line.correct-line{ color:var(--tab-green); font-weight:600; }
.review-row .rr-line.wrong-line{ color:var(--red-pen); font-weight:600; }

.demo-note{
  margin:24px 0; background:var(--highlighter); border-radius:var(--radius-m);
  padding:12px 16px; font-size:.85rem; color:var(--ink); transform:rotate(-.4deg);
}

/* ===================================================================
   AUTH FORMS — giris.html / kayit.html
=================================================================== */
.auth-card{ max-width:420px; margin:30px auto; }
.auth-card h2{ margin-bottom:4px; }
.auth-card .auth-sub{ font-size:.9rem; margin-bottom:22px; }
.form-field{ display:flex; flex-direction:column; gap:6px; margin-bottom:16px; }
.form-field label{ font-family:'Manrope'; font-weight:700; font-size:.85rem; color:var(--ink); }
.form-field input, .form-field select{
  border:1.5px solid var(--grid-line); border-radius:10px; padding:11px 14px;
  font-family:'Manrope'; font-size:.95rem; color:var(--ink); background:#fff;
}
.form-field input:focus, .form-field select:focus{ border-color:var(--red-pen); outline:none; }
.form-error{
  background:#FBEFEC; border:1.5px solid var(--red-pen); color:var(--red-pen-dark);
  border-radius:10px; padding:10px 14px; font-size:.85rem; margin-bottom:16px; display:none;
}
.form-error.visible{ display:block; }
.form-success{
  background:#EAF6EF; border:1.5px solid var(--tab-green); color:#1F7A4F;
  border-radius:10px; padding:10px 14px; font-size:.85rem; margin-bottom:16px; display:none;
}
.form-success.visible{ display:block; }
.auth-card .btn{ width:100%; justify-content:center; margin-top:4px; }
.auth-switch{ text-align:center; font-size:.88rem; color:var(--ink-soft); margin-top:18px; }
.auth-switch a{ color:var(--red-pen); font-weight:700; text-decoration:none; }

/* ===================================================================
   DASHBOARD (panelim.html) & LEADERBOARD (liderlik.html)
=================================================================== */
.dash-stats{ display:grid; grid-template-columns:repeat(auto-fit,minmax(140px,1fr)); gap:14px; margin:24px 0 34px; }
.dash-stats .result-stat .stat-num{ color:var(--ink); }

/* ---------- panelim: zayıf olduğun konular ---------- */
.weak-topics{ margin:0 0 34px; }
.weak-topics h3{ font-family:'Manrope'; font-size:1.05rem; margin-bottom:4px; }
.topics-hint{ font-size:.85rem; color:var(--ink-soft); margin-bottom:16px; }
.topic-bar-row{ display:grid; grid-template-columns:1fr auto; gap:4px 12px; align-items:center; margin-bottom:14px; }
.topic-bar-label{ display:flex; justify-content:space-between; gap:10px; font-size:.92rem; font-weight:700; color:var(--ink); }
.topic-grade{ font-weight:400; color:var(--ink-faint); font-size:.85em; }
.topic-bar-pct{ font-family:'JetBrains Mono'; }
.topic-bar-meta{ grid-row:1; font-size:.78rem; color:var(--ink-faint); white-space:nowrap; }
.topic-bar-track{ grid-column:1/-1; height:10px; background:var(--paper-shadow,#EFEAE0); border-radius:6px; overflow:hidden; border:1px solid var(--grid-line); }
.topic-bar-fill{ height:100%; border-radius:6px; }
.topic-bar-fill.is-weak{ background:var(--red-pen); }
.topic-bar-fill.is-mid{ background:var(--tab-amber); }
.topic-bar-fill.is-strong{ background:#3F8F5F; }

.result-table{ width:100%; border-collapse:collapse; margin:10px 0 30px; }
.result-table th, .result-table td{ text-align:left; padding:10px 12px; font-size:.88rem; border-bottom:1px solid var(--grid-line); }
.result-table th{ font-family:'Manrope'; font-size:.74rem; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-faint); }
.result-table td.num{ font-family:'JetBrains Mono'; }
.result-table tr:hover{ background:var(--paper-soft); }
.empty-state{ background:var(--paper-soft); border:1.5px dashed var(--ink-faint); border-radius:var(--radius-m); padding:24px; text-align:center; color:var(--ink-soft); }

.lb-filters{ display:flex; gap:8px; flex-wrap:wrap; margin:20px 0; }
.lb-table .rank-cell{ font-family:'JetBrains Mono'; font-weight:700; }
.lb-table tr:nth-child(1) .rank-cell{ color:#C9A227; }
.lb-table tr:nth-child(2) .rank-cell{ color:#9AA0A6; }
.lb-table tr:nth-child(3) .rank-cell{ color:#B0703A; }

/* ===================================================================
   ADMIN PANEL — admin.html
=================================================================== */
.admin-section{ margin:30px 0; }
.admin-section h3{ margin-bottom:14px; }
.inline-form{ display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:12px; align-items:end; }
.inline-form .form-field{ margin-bottom:0; }
.inline-form .btn{ grid-column:span 1; height:fit-content; }
.inline-form textarea{
  border:1.5px solid var(--grid-line); border-radius:10px; padding:11px 14px;
  font-family:'Manrope'; font-size:.95rem; color:var(--ink); background:#fff; resize:vertical; min-height:60px;
}
.inline-form textarea:focus{ border-color:var(--red-pen); outline:none; }
.btn-sm{ padding:6px 14px; font-size:.78rem; border-radius:16px; }
.btn-danger{ background:transparent; color:var(--red-pen); border:1.5px solid var(--red-pen); }
.btn-danger:hover{ background:var(--red-pen); color:#fff; }
.admin-table td.q-text{ max-width:320px; }
.admin-table .correct-badge{
  font-family:'JetBrains Mono'; font-weight:700; font-size:.78rem; color:var(--tab-green);
  background:#EAF6EF; border-radius:8px; padding:2px 8px;
}
.no-access{ background:#FBEFEC; border:1.5px solid var(--red-pen); border-radius:var(--radius-m); padding:24px; color:var(--red-pen-dark); }

/* ---------- admin: sistem kontrolü ---------- */
.diag-row{ font-size:.86rem; padding:8px 12px; border-radius:8px; margin-bottom:6px; line-height:1.5; }
.diag-row code{ font-family:'JetBrains Mono'; font-size:.92em; background:rgba(0,0,0,.06); padding:1px 5px; border-radius:4px; }
.diag-ok{ background:#EAF6EE; color:#1F6B3A; }
.diag-bad{ background:#FBEFEC; color:var(--red-pen-dark); }
.diag-info{ background:var(--paper); color:var(--ink-soft); border:1px solid var(--grid-line); }

/* ---------- soru oluşturma: matematik araç çubuğu ---------- */
.math-toolbar{ display:flex; flex-wrap:wrap; gap:6px; margin:14px 0 6px; }
.math-toolbar button{
  font-family:'JetBrains Mono'; font-size:.82rem; font-weight:700; color:var(--ink);
  background:#fff; border:1.5px solid var(--ink-faint); border-radius:8px;
  padding:6px 12px; cursor:pointer;
}
.math-toolbar button:hover{ border-color:var(--red-pen); color:var(--red-pen); }
.toolbar-hint{ font-size:.78rem; color:var(--ink-faint); margin-bottom:14px; }

/* ---------- görsel: yükle/çiz sekmeleri ---------- */
.img-tabs{ display:flex; gap:8px; margin-bottom:10px; }
.img-tab-btn{
  font-family:'Manrope'; font-weight:700; font-size:.82rem; color:var(--ink-soft);
  background:#fff; border:1.5px solid var(--grid-line); border-radius:16px;
  padding:6px 14px; cursor:pointer;
}
.img-tab-btn.is-active{ background:var(--ink); color:#fff; border-color:var(--ink); }
.img-tab-panel{ margin-bottom:10px; }
.form-hint{ font-size:.78rem; color:var(--ink-faint); margin-top:6px; }

#image-preview-wrap{ display:flex; align-items:center; gap:14px; margin-top:10px; }
#image-preview{ max-width:160px; max-height:120px; border:1.5px solid var(--grid-line); border-radius:var(--radius-m); }

/* ---------- görsel: çizim (grafik) aracı ---------- */
.canvas-toolbar{ display:flex; flex-wrap:wrap; align-items:center; gap:6px; margin-bottom:10px; }
.canvas-tool-btn{
  font-family:'Manrope'; font-size:.8rem; font-weight:700; color:var(--ink);
  background:#fff; border:1.5px solid var(--ink-faint); border-radius:8px;
  padding:6px 12px; cursor:pointer;
}
.canvas-tool-btn.is-active{ background:var(--red-pen); color:#fff; border-color:var(--red-pen); }
.canvas-grid-toggle{ font-size:.82rem; color:var(--ink-soft); display:flex; align-items:center; gap:5px; }
#canvas-color{ border:1.5px solid var(--ink-faint); border-radius:8px; padding:5px 8px; font-size:.82rem; }
/* ---------- görsel: hazır grafik oluşturucu (pasta/sütun) ---------- */
.chart-builder{
  background:var(--paper); border:1.5px solid var(--grid-line); border-radius:var(--radius-m);
  padding:12px 14px; margin-bottom:12px;
}
.chart-builder-head{ display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px; font-weight:700; font-size:.88rem; color:var(--ink); }
.chart-builder-head select{ border:1.5px solid var(--ink-faint); border-radius:8px; padding:5px 8px; font-size:.82rem; }
.chart-row{ display:grid; grid-template-columns:1fr 110px auto; gap:8px; margin-bottom:6px; }
.chart-row input{ border:1.5px solid var(--ink-faint); border-radius:8px; padding:6px 10px; font-size:.85rem; }
.chart-row-remove{
  width:30px; height:30px; border:1.5px solid var(--ink-faint); border-radius:8px; background:#fff;
  color:var(--red-pen); cursor:pointer; font-size:.85rem;
}

.canvas-wrap{
  position:relative; width:100%; max-width:600px; aspect-ratio:600/400;
  border:1.5px solid var(--ink); border-radius:var(--radius-m); overflow:hidden; background:#fff;
  touch-action:none;
}
.canvas-wrap canvas{ position:absolute; top:0; left:0; width:100%; height:100%; }

/* ---------- hakkımızda ---------- */
.about-card h3{
  font-size:1.25rem; font-weight:700; color:var(--ink); margin:32px 0 10px;
  padding-bottom:6px; border-bottom:2px solid var(--highlighter);
  font-family:'Manrope', sans-serif;
}
.about-quote{
  margin:28px 0; padding:18px 24px;
  background:var(--highlighter); border-left:4px solid var(--tab-amber);
  border-radius:0 var(--radius-m) var(--radius-m) 0;
  font-style:italic; font-size:1.13rem; color:var(--ink); line-height:1.75;
  transform:rotate(-.2deg);
}
.admin-thumb{ width:54px; height:40px; object-fit:cover; border-radius:6px; border:1px solid var(--grid-line); }

/* ---------- canlı önizleme ---------- */
.live-preview{ margin-top:24px; padding-top:18px; border-top:2px dashed var(--ink-faint); }
.live-preview h4{ font-family:'Manrope'; font-size:.85rem; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-faint); margin-bottom:12px; }