/* Quick Task: one stylesheet for every page. Colours are tokens; dark mode redefines them. */
:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface-2: #eef0f6;
  --border: #dde1ea;
  --text: #171b26;
  --muted: #5d6578;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eceafe;
  --on-accent: #ffffff;
  --danger: #c62828;
  --danger-soft: #fdecec;
  --ok: #1b7f45;
  --ok-soft: #e6f5ec;
  --shadow: 0 1px 2px rgb(16 24 40 / .05), 0 4px 16px rgb(16 24 40 / .06);
  --radius: 12px;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0f1117;
  --surface: #171a23;
  --surface-2: #1f2330;
  --border: #2c3142;
  --text: #e7e9f0;
  --muted: #9aa2b6;
  --accent: #8b85ff;
  --accent-hover: #a29dff;
  --accent-soft: #262447;
  --on-accent: #10121a;
  --danger: #ff7b7b;
  --danger-soft: #3a1d22;
  --ok: #5fd08f;
  --ok-soft: #173326;
  --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 4px 16px rgb(0 0 0 / .25);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1117;
    --surface: #171a23;
    --surface-2: #1f2330;
    --border: #2c3142;
    --text: #e7e9f0;
    --muted: #9aa2b6;
    --accent: #8b85ff;
    --accent-hover: #a29dff;
    --accent-soft: #262447;
    --on-accent: #10121a;
    --danger: #ff7b7b;
    --danger-soft: #3a1d22;
    --ok: #5fd08f;
    --ok-soft: #173326;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 4px 16px rgb(0 0 0 / .25);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5rem; }
h1 { font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.2rem); letter-spacing: -.02em; }
h2 { font-size: 1.2rem; }
p { margin: 0 0 1rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 1.15rem; color: var(--text); text-decoration: none; }
.brand:hover { color: var(--text); }
.brand b { color: var(--accent); }
.brand-mark {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px;
  background: var(--accent); color: var(--on-accent); font-weight: 800;
}
.theme-toggle {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer;
}
.theme-toggle svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Page shell: sidebar + content */
.shell { flex: 1; width: 100%; max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 32px; padding: 28px 24px 48px; }
.sidebar { position: sticky; top: 86px; align-self: start; max-height: calc(100vh - 110px); overflow: auto; }
.nav-details > summary { display: none; }
.nav-group { margin-bottom: 18px; }
.nav-heading { margin: 0 0 6px; padding: 0 10px; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--text); text-decoration: none; font-size: .95rem; }
.sidebar a:hover { background: var(--surface-2); }
.sidebar a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
main { min-width: 0; }

/* Home */
.hero { margin-bottom: 28px; }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 46rem; }
.search { width: 100%; max-width: 30rem; }
.card-group { margin-bottom: 28px; }
.card-group h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: 10px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.card {
  display: flex; flex-direction: column; gap: 4px; padding: 18px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  text-decoration: none; color: var(--text); box-shadow: var(--shadow);
  transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--accent); color: var(--text); transform: translateY(-2px); }
.card-title { font-weight: 650; }
.card-blurb { color: var(--muted); font-size: .92rem; }
.empty { color: var(--muted); }

/* Tool pages */
.lead { color: var(--muted); font-size: 1.05rem; max-width: 50rem; }
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px;
}
.tool-grid { display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); gap: 20px; align-items: start; }
.tool-grid > .panel { margin-bottom: 0; }
.tool-grid + .about { margin-top: 32px; }
.fields { display: grid; gap: 14px; }
.field { display: grid; gap: 6px; min-width: 0; }
input[type="file"] { max-width: 100%; min-width: 0; font: inherit; font-size: .9rem; color: var(--muted); }
.field > span, .label { font-size: .88rem; font-weight: 600; }
.field small, .hint { color: var(--muted); font-size: .82rem; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
input[type="text"], input[type="number"], input[type="search"], input[type="datetime-local"], select, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 9px; padding: 9px 11px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
textarea { min-height: 220px; resize: vertical; font-family: var(--mono); font-size: .92rem; line-height: 1.5; }
textarea[readonly] { background: var(--surface-2); }
textarea.tall { min-height: 420px; }
.inline-select { width: auto; padding: 8px 10px; }
.check-panel { max-width: 30rem; }
.check { display: flex; align-items: center; gap: 9px; font-size: .95rem; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.mono { font-family: var(--mono); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font: inherit; font-weight: 600; font-size: .93rem; padding: 9px 16px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--on-accent); }
.btn-block { width: 100%; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.output-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.output-head .label { margin: 0; }
.stats { display: flex; flex-wrap: wrap; gap: 6px 16px; color: var(--muted); font-size: .85rem; margin-top: 8px; }
.stats b { color: var(--text); font-weight: 600; }
.message { margin-top: 10px; padding: 9px 12px; border-radius: 9px; font-size: .9rem; }
.message:empty { display: none; }
.message.error { background: var(--danger-soft); color: var(--danger); }
.message.ok { background: var(--ok-soft); color: var(--ok); }
.button-groups { display: grid; gap: 14px; }
.button-groups .label { display: block; margin-bottom: 6px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.result-list { display: grid; gap: 8px; margin: 0; }
.result-list div { display: grid; grid-template-columns: 110px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 8px 10px; background: var(--surface-2); border-radius: 9px; }
.result-list dt { font-weight: 600; font-size: .88rem; }
.result-list dd { margin: 0; font-family: var(--mono); font-size: .88rem; overflow-wrap: anywhere; }
.strength { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; margin-top: 4px; }
.strength i { display: block; height: 100%; width: 0; background: var(--danger); transition: width .2s, background .2s; }
.big-value { font-family: var(--mono); font-size: 1.6rem; font-weight: 650; overflow-wrap: anywhere; }

.about { max-width: 50rem; color: var(--text); }
.about h2 { margin-top: 1.5rem; }
.about p, .about li { color: var(--muted); }

.footer { border-top: 1px solid var(--border); padding: 20px 24px 28px; text-align: center; color: var(--muted); font-size: .88rem; }
.footer p { margin: 4px 0; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--text); color: var(--bg); padding: 9px 16px; border-radius: 999px; font-size: .9rem; font-weight: 600;
  transition: opacity .2s, transform .2s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Phones and small tablets */
@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); gap: 16px; padding: 16px 16px 40px; }
  .sidebar { position: static; max-height: none; overflow: visible; }
  .nav-details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
  .nav-details > summary { display: block; padding: 12px 16px; font-weight: 600; cursor: pointer; }
  .nav-details[open] > summary { border-bottom: 1px solid var(--border); }
  .nav-details .nav-group { padding: 10px 6px 0; }
  .tool-grid, .split { grid-template-columns: minmax(0, 1fr); }
  .topbar { padding: 10px 16px; }
  .result-list div { grid-template-columns: minmax(0, 1fr) auto; }
  .result-list dt { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }