/* Light is the default; dark applies only when the visitor picks it (assets/theme.js). */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f1f4f3;
  --text: #0f1f1a;
  --muted: #5d6b67;
  --border: #e3e8e6;
  --accent: #047857;
  --accent-2: #0d9488;
  --accent-soft: #e6f4ef;
  --on-accent: #ffffff;
  --ok: #047857;
  --ok-soft: #e6f4ef;
  --warn: #b45309;
  --warn-soft: #fdf3e2;
  --bad: #b91c1c;
  --bad-soft: #fdecec;
  --shadow: 0 1px 2px rgb(16 24 20 / .04), 0 4px 16px rgb(16 24 20 / .05);
  --shadow-lg: 0 2px 4px rgb(16 24 20 / .04), 0 12px 32px rgb(16 24 20 / .09);
  --radius: 18px;
  --radius-sm: 12px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0b1210;
  --surface: #121b18;
  --surface-2: #17221f;
  --text: #e6efec;
  --muted: #95a6a1;
  --border: #22302c;
  --accent: #34d399;
  --accent-2: #2dd4bf;
  --accent-soft: #11291f;
  --on-accent: #052e20;
  --ok: #34d399;
  --ok-soft: #11291f;
  --warn: #fbbf24;
  --warn-soft: #2a2110;
  --bad: #f87171;
  --bad-soft: #2d1515;
  --shadow: 0 1px 2px rgb(0 0 0 / .3);
  --shadow-lg: 0 8px 28px rgb(0 0 0 / .4);
  color-scheme: dark;
}

/* Category colours: --cat is the strong tone, --cat-soft its tinted background. */
[data-cat="finance"] { --cat: #b45309; --cat-soft: #fdf1df; }
[data-cat="health"] { --cat: #be123c; --cat-soft: #fdebef; }
[data-cat="education"] { --cat: #1d4ed8; --cat-soft: #e8eefd; }
[data-cat="dates"] { --cat: #7c3aed; --cat-soft: #f1ebfe; }
:root[data-theme="dark"] [data-cat="finance"] { --cat: #fbbf24; --cat-soft: #2b2110; }
:root[data-theme="dark"] [data-cat="health"] { --cat: #fb7185; --cat-soft: #2e1519; }
:root[data-theme="dark"] [data-cat="education"] { --cat: #60a5fa; --cat-soft: #131f36; }
:root[data-theme="dark"] [data-cat="dates"] { --cat: #a78bfa; --cat-soft: #1f1836; }

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.8 "IBM Plex Sans Arabic", "Segoe UI", Tahoma, "Noto Sans Arabic", "Geeza Pro", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px; border-radius: 6px; }

/* Header */
header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid var(--border);
}
header.site .wrap { display: flex; align-items: center; gap: 12px 20px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; white-space: nowrap; }
.brand svg { flex: none; }
.brand span { color: var(--accent); }
nav.main { display: flex; gap: 4px; font-size: .92rem; overflow-x: auto; scrollbar-width: none; flex: 1; }
nav.main::-webkit-scrollbar { display: none; }
nav.main a { color: var(--muted); text-decoration: none; padding: 6px 12px; border-radius: 999px; white-space: nowrap; transition: background .15s, color .15s; }
nav.main a:hover { color: var(--text); background: var(--surface-2); }
nav.main a[data-cat]::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-inline-end: 7px; border-radius: 50%; background: var(--cat); vertical-align: 1px; }
nav.main a[data-cat]:hover { color: var(--cat); background: var(--cat-soft); }
button.theme-toggle {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  min-height: 0;
  margin: 0;
  padding: 0;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 1.1rem;
  font-weight: 400;
  box-shadow: none;
}
button.theme-toggle:hover { border-color: var(--accent); transform: none; box-shadow: none; }
@media (max-width: 640px) {
  header.site .wrap { flex-wrap: wrap; padding-block: 10px; gap: 8px 12px; }
  .brand { order: 1; flex: 1; }
  button.theme-toggle { order: 2; }
  nav.main { order: 3; flex-basis: 100%; margin-inline: -16px; padding-inline: 12px; }
}

/* Typography */
.crumbs { font-size: .84rem; color: var(--muted); margin: 20px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.crumbs li + li::before { content: "‹"; margin-left: 6px; opacity: .6; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
h1 { font-size: clamp(1.6rem, 4vw, 2.15rem); line-height: 1.35; margin: 14px 0 8px; letter-spacing: -.01em; }
h2 { font-size: 1.32rem; line-height: 1.5; margin: 40px 0 10px; }
h3 { font-size: 1.08rem; margin: 22px 0 6px; }
.lead { color: var(--muted); margin-top: 0; font-size: 1.05rem; }
main ul, main ol { padding-right: 22px; }
main li { margin-bottom: 4px; }
main li::marker { color: var(--accent); }

/* Home hero */
.hero {
  margin: 20px 0 8px;
  padding: clamp(24px, 5vw, 44px);
  border-radius: 24px;
  background:
    radial-gradient(120% 140% at 100% 0%, color-mix(in srgb, var(--accent-2) 22%, transparent), transparent 60%),
    radial-gradient(100% 120% at 0% 100%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 55%),
    var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.hero h1 { margin-top: 0; }
.hero .lead { max-width: 60ch; }
.search { position: relative; margin-top: 20px; max-width: 520px; }
.search input { padding-inline-start: 46px; min-height: 52px; border-radius: 999px; background: var(--surface); box-shadow: var(--shadow); }
.search svg { position: absolute; inset-inline-start: 16px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.no-results { color: var(--muted); }

/* Cards and forms */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(18px, 3vw, 28px);
  margin: 22px 0;
  box-shadow: var(--shadow);
}
.card h2 { margin-top: 0; font-size: 1.15rem; }
form .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
label { display: block; font-size: .9rem; font-weight: 600; margin-bottom: 6px; }
label small { font-weight: 400; color: var(--muted); }
input, select {
  width: 100%;
  font: inherit;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  min-height: 50px;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
input::placeholder { color: color-mix(in srgb, var(--muted) 75%, transparent); }
input:hover, select:hover { border-color: color-mix(in srgb, var(--accent) 35%, var(--border)); }
input:focus, select:focus { outline: none; border-color: var(--accent); background: var(--surface); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent); }

/* Radio and checkbox options as pills */
.radios { display: flex; flex-wrap: wrap; gap: 8px; }
.radios label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 8px 14px;
  font-weight: 500;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.radios label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.radios input { width: auto; min-height: 0; margin: 0; accent-color: var(--accent); box-shadow: none; }

button {
  margin-top: 20px;
  font: inherit;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  border: 0;
  border-radius: var(--radius-sm);
  padding: 12px 30px;
  min-height: 50px;
  cursor: pointer;
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 28%, transparent);
  transition: transform .15s, box-shadow .15s;
}
button:hover { transform: translateY(-1px); box-shadow: 0 10px 22px color-mix(in srgb, var(--accent) 32%, transparent); }
button:active { transform: none; }
button.secondary { background: transparent; color: var(--accent); border: 1.5px dashed var(--accent); box-shadow: none; min-height: 44px; padding: 8px 18px; margin-top: 14px; }
button.secondary:hover { background: var(--accent-soft); }
@media (max-width: 480px) { form > button[type="submit"] { width: 100%; } }
.course + .course { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border); }

/* Results */
.result {
  --tone: var(--accent);
  --tone-soft: var(--accent-soft);
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  background: var(--tone-soft);
  border-inline-start: 4px solid var(--tone);
  display: flex;
  flex-direction: column;
  gap: 4px;
  animation: pop .25s ease-out;
}
.result[data-level="ok"] { --tone: var(--ok); --tone-soft: var(--ok-soft); }
.result[data-level="warn"] { --tone: var(--warn); --tone-soft: var(--warn-soft); }
.result[data-level="bad"] { --tone: var(--bad); --tone-soft: var(--bad-soft); }
.result strong { font-size: clamp(1.35rem, 3.5vw, 1.7rem); line-height: 1.4; color: var(--tone); }
.result span { color: var(--text); font-size: .95rem; }
.result.error { --tone: var(--bad); --tone-soft: var(--bad-soft); color: var(--bad); }
@keyframes pop { from { opacity: 0; transform: translateY(4px); } }
@media (prefers-reduced-motion: reduce) { .result { animation: none; } button, .tools a { transition: none; } }
.today { font-weight: 600; color: var(--accent); }

/* BMI gauge: underweight | normal | overweight | obese on a 15-40 scale (RTL: low values on the right) */
.gauge {
  position: relative;
  height: 10px;
  margin: 10px 0 8px;
  border-radius: 999px;
  background: linear-gradient(to left, #60a5fa 0 14%, #10b981 14% 40%, #f59e0b 40% 60%, #ef4444 60% 100%);
}
.gauge i {
  position: absolute;
  top: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface);
  border: 4px solid var(--text);
  transform: translate(50%, -50%);
}

/* Countdown */
.countdown { text-align: center; }
.cd-title { font-size: 1.2rem; font-weight: 700; margin: 0 0 14px; }
.cd-units { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; max-width: 520px; margin: 0 auto; }
.cd-units div { background: var(--accent-soft); border-radius: var(--radius-sm); padding: 14px 4px; }
.cd-units b { display: block; font-size: clamp(1.6rem, 6vw, 2.4rem); line-height: 1.2; color: var(--accent); font-variant-numeric: tabular-nums; }
.cd-units span { font-size: .85rem; color: var(--muted); }
.cd-date { color: var(--muted); margin: 14px 0 0; }
.cd-list { list-style: none; padding: 0 !important; margin: 20px 0 0; text-align: start; border-top: 1px solid var(--border); }
.cd-list li { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 4px 12px; padding: 10px 2px; border-bottom: 1px solid var(--border); margin: 0; }
.cd-list li span:last-child { color: var(--muted); font-size: .92rem; }

/* Tool cards */
h2.cat { margin: 36px 0 14px; display: flex; align-items: center; gap: 10px; }
h2.cat::before { content: ""; flex: none; width: 6px; height: 1.1em; border-radius: 3px; background: var(--cat, var(--accent)); }
h2.cat::after { content: ""; flex: 1; height: 1px; background: linear-gradient(to left, color-mix(in srgb, var(--cat, var(--accent)) 40%, transparent), var(--border)); }
.tools { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; margin: 16px 0; }
.tools a {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .18s, box-shadow .18s, border-color .18s;
}
.tools a:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--cat, var(--accent)) 45%, var(--border)); }
.tools strong { display: block; color: var(--text); font-size: 1.02rem; margin-bottom: 2px; }
.tools a:hover strong { color: var(--cat, var(--accent)); }
.tools span { display: block; font-size: .88rem; line-height: 1.6; color: var(--muted); }
.tools .icon {
  flex: none;
  width: 46px;
  height: 46px;
  padding: 10px;
  border-radius: 14px;
  background: var(--cat-soft, var(--accent-soft));
  color: var(--cat, var(--accent));
}
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; padding: 0 !important; list-style: none; }
.features li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin: 0; color: var(--muted); }
.features strong { display: block; color: var(--accent); font-size: 1.05rem; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); margin: 14px 0; background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: .94rem; }
th, td { padding: 11px 14px; text-align: right; border-bottom: 1px solid var(--border); }
th { background: var(--surface-2); font-weight: 600; font-size: .88rem; color: var(--muted); white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: color-mix(in srgb, var(--accent-soft) 50%, transparent); }
tr.hl td { font-weight: 700; background: var(--accent-soft); }
table.compact td { white-space: nowrap; }
@media (max-width: 480px) { table.compact th, table.compact td { padding: 10px 8px; font-size: .86rem; } }

/* FAQ */
details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 18px;
  margin: 10px 0;
  transition: border-color .15s;
}
details[open] { border-color: color-mix(in srgb, var(--accent) 35%, var(--border)); }
summary { font-weight: 600; cursor: pointer; padding: 14px 0; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; line-height: 1; transition: transform .2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 0 0 16px; color: var(--muted); }

.note {
  font-size: .88rem;
  color: var(--muted);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.ad { margin: 28px 0; min-height: 280px; }
@media (min-width: 728px) { .ad { min-height: 120px; } }

/* Related tools */
.related { margin-top: 48px; }
.related ul { list-style: none; padding: 0 !important; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
.related li { margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 16px; font-size: .9rem; color: var(--muted); }
.related li { border-inline-start: 4px solid var(--cat, var(--border)); }
.related li a { display: block; font-weight: 600; font-size: 1rem; text-decoration: none; color: var(--cat, var(--accent)); }

footer.site { margin-top: 64px; padding: 28px 0; border-top: 1px solid var(--border); background: var(--surface); font-size: .88rem; color: var(--muted); }
footer.site nav { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 8px; }
footer.site a { color: var(--muted); text-decoration: none; }
footer.site a:hover { color: var(--accent); }