:root {
  --bg: #0f1115;
  --bg2: #171a21;
  --card: #1c2029;
  --card-edge: #2a2f3a;
  --text: #e6e8ee;
  --muted: #8b93a3;
  --accent: #5b9cff;
  --accent-2: #3d7be0;
  --ok: #3fbf7f;
  --warn: #f2b34c;
  --danger: #e5556b;
  --today: #5b9cff;
  --radius: 12px;
  --font: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, Menlo, monospace;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f5f8;
    --bg2: #ffffff;
    --card: #ffffff;
    --card-edge: #dfe3ea;
    --text: #1d2230;
    --muted: #6b7281;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 var(--font);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0; font-weight: 600; line-height: 1.25; }
small { color: var(--muted); font-weight: 400; }
.muted { color: var(--muted); }
code { font-family: var(--mono); font-size: .92em; background: var(--bg2); padding: 1px 5px; border-radius: 4px; }
pre { background: var(--bg2); padding: 10px 12px; border-radius: 8px; overflow-x: auto; font-family: var(--mono); font-size: .9em; }

/* Üst bar */
.top {
  display: flex; align-items: center; gap: 18px;
  padding: 10px 20px;
  background: var(--bg2);
  border-bottom: 1px solid var(--card-edge);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 17px; color: var(--text); }
.top nav { display: flex; gap: 4px; flex: 1; }
.top nav a {
  color: var(--muted); padding: 6px 12px; border-radius: 8px; font-weight: 500;
}
.top nav a:hover { text-decoration: none; background: var(--card); color: var(--text); }
.top nav a.active { background: var(--card); color: var(--text); }
.logout { margin: 0; }

main { max-width: 1500px; margin: 0 auto; padding: 20px; }

/* Butonlar */
button, .btn {
  font: inherit; font-weight: 500; cursor: pointer;
  border: 1px solid var(--card-edge); background: var(--card); color: var(--text);
  padding: 7px 14px; border-radius: 8px; line-height: 1.3;
  display: inline-flex; align-items: center; gap: 6px;
}
button:hover, .btn:hover { border-color: var(--accent); text-decoration: none; }
button:disabled { opacity: .5; cursor: default; }
.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.primary:hover { background: var(--accent-2); }
.ghost { background: transparent; }
.danger { color: var(--danger); background: transparent; }
.danger:hover { border-color: var(--danger); }
.small { padding: 4px 10px; font-size: 13px; }
.wide { width: 100%; justify-content: center; }

/* Flash & toast */
.flash { max-width: 520px; margin: 16px auto 0; padding: 10px 14px; background: color-mix(in srgb, var(--warn) 18%, var(--card)); border: 1px solid var(--warn); border-radius: 8px; }
.flash p { margin: 0; }
.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--ok); color: #fff; padding: 8px 16px; border-radius: 999px;
  font-weight: 600; box-shadow: 0 6px 20px rgba(0,0,0,.35); z-index: 50;
}
.toast.err { background: var(--danger); }

/* Kartlar */
.card {
  background: var(--card); border: 1px solid var(--card-edge);
  border-radius: var(--radius); padding: 14px;
  display: flex; flex-direction: column; gap: 10px;
}
.card > header { display: flex; align-items: center; gap: 8px; }
.card > header h1, .card > header h2 { flex: 1; font-size: 16px; }
.card > header h1 { font-size: 22px; }
.progress {
  font-size: 12px; font-weight: 600; color: var(--muted);
  background: var(--bg2); padding: 2px 8px; border-radius: 999px; white-space: nowrap;
}
.card.today { border-color: var(--today); box-shadow: 0 0 0 1px var(--today) inset; }
.card.today h2 { color: var(--today); }

/* Hafta */
.weekbar { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.weektitle { display: flex; flex-direction: column; min-width: 180px; text-align: center; }
.weektitle h1 { font-size: 22px; }
.range { color: var(--muted); font-size: 13px; }
.week-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  align-items: start;
}
.card.goals { grid-column: 1 / -1; border-style: dashed; }
@media (min-width: 1500px) {
  .week-grid { grid-template-columns: repeat(7, 1fr); }
}

/* Editör */
.editbox { display: flex; flex-direction: column; gap: 8px; }
textarea[data-text] {
  width: 100%; min-height: 120px; resize: vertical;
  font: 14px/1.5 var(--mono); color: var(--text);
  background: var(--bg2); border: 1px solid var(--card-edge); border-radius: 8px;
  padding: 10px; outline: none;
}
textarea[data-text]:focus { border-color: var(--accent); }
.editbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.hint { color: var(--muted); font-size: 12px; margin-left: auto; }
.view { min-height: 24px; cursor: text; }

/* Markdown çıktısı */
.md > :first-child { margin-top: 0; }
.md > :last-child { margin-bottom: 0; }
.md p { margin: 6px 0; }
.md h1, .md h2, .md h3 { margin: 10px 0 6px; }
.md h1 { font-size: 18px; } .md h2 { font-size: 16px; } .md h3 { font-size: 15px; }
.md ul, .md ol { padding-left: 22px; margin: 4px 0; }
.md li { margin: 3px 0; }
.md li:has(> input.task), .md li:has(> p > input.task) { list-style: none; margin-left: -20px; }
.md input.task { accent-color: var(--ok); width: 16px; height: 16px; margin: 0 6px 0 0; vertical-align: -3px; cursor: pointer; }
.md li:has(> input.task:checked), .md li:has(> p > input.task:checked) { color: var(--muted); text-decoration: line-through; }
.md li:has(> input.task:checked) ul, .md li:has(> input.task:checked) ol { text-decoration: none; }
.md blockquote { margin: 6px 0; padding: 4px 12px; border-left: 3px solid var(--accent); color: var(--muted); }
.md table { border-collapse: collapse; }
.md td, .md th { border: 1px solid var(--card-edge); padding: 4px 8px; }
.md hr { border: 0; border-top: 1px solid var(--card-edge); }
.md .empty { color: var(--muted); font-style: italic; }

/* Notlar */
.pagehead { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; flex-wrap: wrap; }
.pagehead h1 { flex: 1; font-size: 22px; }
.newnote { display: flex; gap: 8px; }
.newnote input, .login input {
  font: inherit; color: var(--text); background: var(--bg2);
  border: 1px solid var(--card-edge); border-radius: 8px; padding: 7px 12px; outline: none;
}
.newnote input { min-width: 260px; }
.newnote input:focus, .login input:focus { border-color: var(--accent); }
.notelist { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.notecard { color: var(--text); gap: 8px; }
.notecard:hover { text-decoration: none; border-color: var(--accent); }
.noterow { display: flex; align-items: center; gap: 8px; }
.noterow h2 { flex: 1; font-size: 16px; }
.bar { height: 6px; background: var(--bg2); border-radius: 999px; overflow: hidden; }
.bar .fill { height: 100%; background: var(--accent); width: 0; transition: width .3s; }
.bar .fill.full { background: var(--ok); }
.card.note { max-width: 900px; }

/* Giriş */
.login-wrap { display: flex; justify-content: center; padding-top: 10vh; }
.login { width: 100%; max-width: 380px; gap: 14px; padding: 24px; }
.login h1 { font-size: 22px; }
.login label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.login input { font-size: 15px; }
.warn { color: var(--warn); margin: 0; }

@media (max-width: 640px) {
  main { padding: 12px; }
  .top { padding: 8px 12px; gap: 10px; }
  .top nav a { padding: 6px 8px; font-size: 14px; }
  .hint { display: none; }
}