:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --border: #e2e5ee;
  --text: #161a26;
  --muted: #646b80;
  --accent: #4b5bdc;
  --hover: #eef0fb;
}
/* Koyu tema: seçim yoksa sistem temasına uyar; seçim (cookie) varsa server.py
   <html>'e data-theme="light|dark" ekler */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1017;
    --card: #151a24;
    --border: #252c3b;
    --text: #e6e9f2;
    --muted: #8a92a8;
    --accent: #8b97ff;
    --hover: #1b2130;
    color-scheme: dark;
  }
  :root:not([data-theme="light"]) .to-dark { display: none; }
  :root:not([data-theme="light"]) .to-light { display: grid; }
}
:root[data-theme="dark"] {
  --bg: #0d1017;
  --card: #151a24;
  --border: #252c3b;
  --text: #e6e9f2;
  --muted: #8a92a8;
  --accent: #8b97ff;
  --hover: #1b2130;
  color-scheme: dark;
}
:root[data-theme="dark"] .to-dark { display: none; }
:root[data-theme="dark"] .to-light { display: grid; }
* { box-sizing: border-box; }
/* Sağ üst araç çubuğu: tema düğmesi (aktif temanın tersine geçen link görünür) + çıkış */
.toolbar {
  position: fixed;
  top: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
}
.toolbar form { margin: 0; display: contents; }
.tool {
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--muted);
  transition: color .15s, border-color .15s;
}
.tool:hover, .tool:focus-visible { color: var(--accent); border-color: var(--accent); outline: none; }
.tool svg { width: 20px; height: 20px; }
button.tool { display: grid; padding: 0; font: inherit; cursor: pointer; }
.to-dark { display: grid; }
.to-light { display: none; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh; /* mobilde adres çubuğu dahil görünen yükseklik */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  background: var(--bg);
  color: var(--text);
  transition: background-color .2s, color .2s;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header { text-align: center; margin-bottom: 32px; }
/* Telefonda dikey ortalama üstte büyük boşluk bırakır: içerik üstten, ekran
   yüksekliğinin ~%14'ü kadar boşlukla başlar */
@media (max-width: 600px) {
  body { justify-content: flex-start; padding-top: 14vh; min-height: 0; }
  header { margin-bottom: 24px; }
}
h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 650;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
h1 svg { width: 26px; height: 26px; color: var(--accent); }
main {
  width: 100%;
  max-width: 640px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
a.card {
  display: block;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  color: inherit;
  text-decoration: none;
  transition: background .15s, border-color .15s, transform .15s;
}
a.card:hover, a.card:focus-visible {
  background: var(--hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  outline: none;
}
.icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--hover);
  color: var(--accent);
  margin-bottom: 14px;
}
.icon svg { width: 22px; height: 22px; }
h2 { margin: 0 0 4px; font-size: 17px; font-weight: 600; }
.host {
  margin-top: 6px;
  font-size: 13px;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Giriş formu */
form.login {
  width: 100%;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.login label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.login input {
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-size: 16px; /* iOS'ta odaklanınca yakınlaştırmasın */
}
.login input:focus { outline: none; border-color: var(--accent); }
.login button {
  height: 44px;
  margin-top: 4px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.login button:hover, .login button:focus-visible { filter: brightness(1.08); outline: none; }
.error {
  padding: 10px 12px;
  border-radius: 10px;
  background: color-mix(in srgb, #e5484d 14%, transparent);
  color: #e5484d;
  font-size: 14px;
}
.error:empty { display: none; }