:root{
  --bg:#f4f6fa; --surface:#ffffff; --surface-2:#eef1f7; --line:#dfe4ee;
  --text:#18202e; --muted:#5b6578; --primary:#2451b3; --primary-ink:#ffffff;
  --ok:#23864a; --warn:#b35a00; --danger:#c0322b;
  --tr:#d24b16; --mat:#1f6fd1; --hb:#2b8a3e; --muz:#8e3aa8; --gs:#c2255c; --beo:#0b7f90; --se:#9a6b00; --diger:#5b6578;
  --radius:14px; --shadow:0 1px 2px rgba(20,30,50,.06),0 4px 14px rgba(20,30,50,.06);
  --nav-h:64px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0e131b; --surface:#171e29; --surface-2:#1f2835; --line:#2c3746;
    --text:#e8edf5; --muted:#9aa6b8; --primary:#7ea6ff; --primary-ink:#0b1426;
    --ok:#5cc983; --warn:#f0a44b; --danger:#ff7b72;
    --tr:#ff8a5b; --mat:#6fb0ff; --hb:#6fd08a; --muz:#d493ec; --gs:#ff7aa8; --beo:#4fd0e0; --se:#e6bf4f; --diger:#9aa6b8;
    --shadow:none; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0e131b; --surface:#171e29; --surface-2:#1f2835; --line:#2c3746;
  --text:#e8edf5; --muted:#9aa6b8; --primary:#7ea6ff; --primary-ink:#0b1426;
  --ok:#5cc983; --warn:#f0a44b; --danger:#ff7b72;
  --tr:#ff8a5b; --mat:#6fb0ff; --hb:#6fd08a; --muz:#d493ec; --gs:#ff7aa8; --beo:#4fd0e0; --se:#e6bf4f; --diger:#9aa6b8;
  --shadow:none; color-scheme:dark;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  padding-bottom:calc(var(--nav-h) + env(safe-area-inset-bottom) + 16px)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--primary)}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
:focus-visible{outline:3px solid color-mix(in srgb,var(--primary) 55%,transparent);outline-offset:2px}

/* Üst bar + gezinme */
/* Not: .top'a backdrop-filter verilmez; alttaki sabit .tabs menüsünü üste taşır. */
.top{position:sticky;top:0;z-index:20;background:var(--bg);
  border-bottom:1px solid var(--line);padding:10px 16px;padding-top:calc(10px + env(safe-area-inset-top))}
.brand{display:flex;align-items:center;gap:10px;max-width:980px;margin:0 auto}
.brand img{border-radius:9px}
.brand h1{font-size:17px;margin:0;line-height:1.2}
.brand p{margin:0;font-size:12.5px;color:var(--muted)}
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;justify-content:space-around;
  background:var(--surface);border-top:1px solid var(--line);
  height:calc(var(--nav-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}
.tabs a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  text-decoration:none;color:var(--muted);font-size:11.5px;font-weight:600;min-width:0}
.tabs a.on{color:var(--primary)}
.tabs a.on svg{stroke-width:2.4}
@media (min-width:820px){
  body{padding-bottom:32px}
  .top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-left:max(16px,calc(50% - 490px));padding-right:max(16px,calc(50% - 490px))}
  .brand{margin:0}
  .tabs{position:static;height:auto;border:0;background:none;gap:4px;padding:0}
  .tabs a{flex:none;flex-direction:row;font-size:14px;padding:8px 12px;border-radius:10px}
  .tabs a svg{width:18px;height:18px}
  .tabs a.on{background:color-mix(in srgb,var(--primary) 12%,transparent)}
}

main{max-width:980px;margin:0 auto;padding:16px;outline:none}
h2{font-size:22px;margin:4px 0 2px;line-height:1.25}
h3{font-size:16px;margin:20px 0 8px}
.sub{color:var(--muted);margin:0 0 12px;font-size:14.5px}
.empty{color:var(--muted);text-align:center;padding:32px 8px}

/* Kartlar */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.banner{border-radius:12px;padding:10px 12px;margin:10px 0;font-size:14.5px;display:flex;gap:8px;align-items:flex-start;
  background:color-mix(in srgb,var(--warn) 12%,var(--surface));border:1px solid color-mix(in srgb,var(--warn) 35%,transparent)}
.banner.info{background:color-mix(in srgb,var(--primary) 9%,var(--surface));border-color:color-mix(in srgb,var(--primary) 30%,transparent)}
.banner svg{width:18px;height:18px;margin-top:2px;color:var(--warn)}
.banner.info svg{color:var(--primary)}

.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--surface);
  border-radius:10px;padding:8px 12px;font-size:14px;font-weight:600;min-height:40px}
.btn svg{width:18px;height:18px}
.btn.primary{background:var(--primary);color:var(--primary-ink);border-color:transparent}
.btn.ghost{background:transparent}
.btn.icon{padding:0;width:42px;justify-content:center}
.btn:disabled{opacity:.4;cursor:default}

/* Hafta gezinme */
.weekbar{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.weekbar select{flex:1;min-width:0;height:42px;border-radius:10px;border:1px solid var(--line);background:var(--surface);padding:0 10px;font-weight:600}
.weektitle{display:flex;align-items:center;gap:6px}
.weektitle span{flex:1;min-width:0;font-weight:700;font-size:15px}
.daytabs{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:12px 0}
.daytabs button{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:7px 2px;line-height:1.15;position:relative}
.daytabs b{display:block;font-size:13px}
.daytabs small{color:var(--muted);font-size:12px}
.daytabs button.on{background:var(--primary);color:var(--primary-ink);border-color:transparent}
.daytabs button.on small{color:inherit;opacity:.85}
.daytabs button.today::after{content:"";position:absolute;top:5px;right:6px;width:7px;height:7px;border-radius:50%;background:var(--ok)}
.daytabs button.hol{border-style:dashed}

.dayhead{display:flex;align-items:flex-start;gap:8px;margin:6px 0 4px}
.dayhead h2{flex:1}
.progress{height:6px;border-radius:6px;background:var(--surface-2);overflow:hidden;margin:6px 0 2px}
.progress i{display:block;height:100%;background:var(--ok);border-radius:6px}

/* Ders kartı */
.lessons{display:flex;flex-direction:column;gap:10px}
.lesson{display:flex;gap:0;overflow:hidden;cursor:pointer;text-align:left;width:100%;padding:0}
.lesson .stripe{width:6px;background:var(--c);flex:none}
.lesson .body{flex:1;min-width:0;padding:11px 12px}
.meta{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:4px}
.num{font-size:12px;font-weight:700;color:var(--muted)}
.chip{display:inline-flex;align-items:center;gap:4px;font-size:12.5px;font-weight:700;letter-spacing:.01em;
  padding:2px 8px;border-radius:999px;color:var(--c);background:color-mix(in srgb,var(--c) 13%,transparent)}
.chip.alt{font-weight:600;background:transparent;border:1px solid color-mix(in srgb,var(--c) 40%,transparent)}
.code{font:600 12.5px/1.3 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--muted)}
.desc{margin:0;font-size:15.5px}
.note{margin:4px 0 0;font-size:13.5px;color:var(--muted)}
.note::before{content:"Etkinlik: ";font-weight:600}
.mynote{margin:6px 0 0;font-size:13.5px;padding:6px 8px;border-radius:8px;background:var(--surface-2);white-space:pre-wrap}
.mynote::before{content:"Notum: ";font-weight:700}
.check{flex:none;align-self:center;margin-right:10px;width:34px;height:34px;border-radius:50%;border:2px solid var(--line);
  background:transparent;display:grid;place-items:center;color:transparent}
.check svg{width:18px;height:18px;stroke-width:3}
.lesson.done .check{background:var(--ok);border-color:var(--ok);color:#fff}
.lesson.done .desc{color:var(--muted)}
.lesson.off{opacity:.62}
[data-s="tr"]{--c:var(--tr)} [data-s="mat"]{--c:var(--mat)} [data-s="hb"]{--c:var(--hb)} [data-s="muz"]{--c:var(--muz)}
[data-s="gs"]{--c:var(--gs)} [data-s="beo"]{--c:var(--beo)} [data-s="se"]{--c:var(--se)} [data-s="diger"]{--c:var(--diger)}

/* Haftalık özet */
details.summary{margin-top:18px;padding:4px 14px}
details.summary summary{cursor:pointer;font-weight:700;padding:10px 0;list-style:none;display:flex;align-items:center;gap:8px}
details.summary summary::-webkit-details-marker{display:none}
details.summary summary::after{content:"▾";margin-left:auto;color:var(--muted)}
details[open].summary summary::after{content:"▴"}
.sumlist{list-style:none;margin:0 0 12px;padding:0;display:flex;flex-direction:column;gap:10px}
.sumlist li{display:flex;flex-direction:column;gap:3px;padding-left:10px;border-left:3px solid var(--c)}

/* Yıl listesi */
.weeks{display:flex;flex-direction:column;gap:8px}
.week{display:flex;align-items:center;gap:12px;padding:10px 12px;text-decoration:none;color:inherit}
.week .no{flex:none;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-weight:800;font-size:17px;
  background:var(--surface-2)}
.week.cur{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary)}
.week.cur .no{background:var(--primary);color:var(--primary-ink)}
.week.hol .no{background:color-mix(in srgb,var(--warn) 18%,var(--surface))}
.week .info{flex:1;min-width:0}
.week .t{font-weight:700;font-size:15px}
.week .r{color:var(--muted);font-size:13px}
.tag{font-size:11.5px;font-weight:700;padding:1px 7px;border-radius:6px;background:color-mix(in srgb,var(--warn) 16%,transparent);color:var(--warn);margin-left:4px;white-space:nowrap}
.tag.now{background:color-mix(in srgb,var(--primary) 14%,transparent);color:var(--primary)}
.pct{font-size:12px;color:var(--muted);text-align:right;min-width:42px}
.term{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:18px 2px 4px}

/* Arama */
.search{position:relative}
.search input{width:100%;height:48px;border-radius:12px;border:1px solid var(--line);background:var(--surface);padding:0 14px 0 42px;font-size:16px}
.search svg{position:absolute;left:12px;top:13px;color:var(--muted)}
.chips{display:flex;gap:6px;overflow-x:auto;padding:10px 0 4px;margin:0 -16px;padding-left:16px;padding-right:16px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chips button{flex:none;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:6px 12px;font-size:13.5px;font-weight:600}
.chips button.on{background:var(--c,var(--primary));border-color:transparent;color:#fff}
:root[data-theme="dark"] .chips button.on{color:#0b1426}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .chips button.on{color:#0b1426}}
.result{padding:11px 12px;display:flex;flex-direction:column;gap:5px}
.wlinks{display:flex;flex-wrap:wrap;gap:5px;margin-top:3px}
.wlinks a{font-size:12.5px;font-weight:600;text-decoration:none;padding:3px 8px;border-radius:8px;background:var(--surface-2);color:var(--text)}
mark{background:color-mix(in srgb,#ffd43b 55%,transparent);color:inherit;border-radius:3px}
.count{color:var(--muted);font-size:13.5px;margin:10px 2px}

/* Ayarlar */
.settings{display:flex;flex-direction:column;gap:12px}
.settings .card{padding:14px}
.settings h3{margin:0 0 6px}
.settings p{margin:0 0 10px;color:var(--muted);font-size:14px}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{border:0;background:var(--surface);padding:8px 14px;font-weight:600;font-size:14px}
.seg button.on{background:var(--primary);color:var(--primary-ink)}
.legend{display:flex;flex-wrap:wrap;gap:6px}

/* Detay penceresi */
dialog#sheet{border:0;padding:0;background:transparent;max-width:none;max-height:none;width:100%;height:100%;margin:0;color:var(--text)}
dialog#sheet::backdrop{background:rgba(10,15,25,.5)}
.sheet-inner{position:absolute;left:0;right:0;bottom:0;max-height:88vh;overflow:auto;background:var(--surface);
  border-radius:18px 18px 0 0;padding:14px 16px calc(18px + env(safe-area-inset-bottom));animation:up .18s ease-out}
@media (min-width:820px){.sheet-inner{left:50%;right:auto;bottom:auto;top:50%;transform:translate(-50%,-50%);width:560px;border-radius:18px;animation:none}}
@keyframes up{from{transform:translateY(24px);opacity:.4}to{transform:none;opacity:1}}
.grab{width:40px;height:4px;border-radius:4px;background:var(--line);margin:0 auto 12px}
.sheet-inner h2{font-size:19px}
.sheet-inner .desc{font-size:16.5px;margin:8px 0}
.sheet-inner textarea{width:100%;min-height:90px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2);padding:10px;resize:vertical}
.sheet-inner label{font-weight:700;font-size:14px;display:block;margin:14px 0 6px}
.sheet-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.sheet-actions .btn{flex:1;justify-content:center}

#toast{position:fixed;left:50%;bottom:calc(var(--nav-h) + env(safe-area-inset-bottom) + 14px);transform:translateX(-50%) translateY(20px);
  background:var(--text);color:var(--bg);padding:10px 16px;border-radius:12px;font-size:14px;font-weight:600;opacity:0;pointer-events:none;
  transition:.2s;z-index:50;max-width:calc(100% - 32px);text-align:center}
#toast.show{opacity:1;transform:translateX(-50%)}
@media (min-width:820px){#toast{bottom:24px}}

/* Alt bilgi, saat, sayaç */
.foot{max-width:980px;margin:24px auto 0;padding:16px;text-align:center;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.foot p{margin:2px 0}
.time{font-size:12px;font-weight:600;color:var(--muted);margin-left:auto;white-space:nowrap}
.lesson.now{border-color:var(--c);box-shadow:0 0 0 2px var(--c)}
.nowtag{font-size:11.5px;font-weight:800;color:#fff;background:var(--c);padding:1px 8px;border-radius:999px}
:root[data-theme="dark"] .nowtag{color:#0b1426}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .nowtag{color:#0b1426}}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:0 0 12px}
.stat{padding:10px 12px}
.stat b{display:block;font-size:20px;line-height:1.1}
.stat span{font-size:12.5px;color:var(--muted)}
.times{display:grid;grid-template-columns:auto 1fr 1fr;gap:6px 8px;align-items:center;margin-bottom:10px}
.times input{height:40px;border-radius:9px;border:1px solid var(--line);background:var(--surface-2);padding:0 8px;min-width:0;width:100%}
.times span{font-weight:700;font-size:14px}
.switch{display:flex;align-items:center;gap:8px;font-weight:600;font-size:14.5px;margin-bottom:10px}
.switch input{width:20px;height:20px}

/* Yazdırma (haftalık sınıf defteri çizelgesi) */
#print{display:none}
@media print{
  @page{size:A4 landscape;margin:10mm}
  body{background:#fff;color:#000;padding:0;font-size:10px}
  .top,main,.foot,#toast,dialog{display:none!important}
  #print .sign{margin-top:18px;display:flex;justify-content:space-between;font-size:11px}
  #print{display:block}
  #print h1{font-size:15px;margin:0 0 2px}
  #print p{margin:0 0 8px;font-size:11px}
  #print table{width:100%;border-collapse:collapse;table-layout:fixed}
  #print th,#print td{border:1px solid #444;padding:4px;vertical-align:top;font-size:9.5px;line-height:1.3}
  #print th{background:#eee}
  #print td b{display:block;font-size:9.5px}
  #print td.d{width:13%;font-weight:700}
  #print .hol{background:#f3f3f3}
}