/* Chandoo. Persian, right to left, light and dark. */

@font-face {
  font-family: Vazirmatn;
  src: url("fonts/Vazirmatn.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --surface-muted: #f1f1ee;
  --text: #1f1f1d;
  --text-secondary: #5f5e5a;
  --text-muted: #888780;
  --border: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.18);
  --accent: #185fa5;
  --accent-fill: #2a78d6;
  --on-accent: #ffffff;
  --accent-tint: #e6f1fb;
  --accent-border: #85b7eb;
  --up: #0f7a4f;
  --down: #c03030;
  --radius: 8px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171716;
    --surface: #201f1e;
    --surface-muted: #2a2927;
    --text: #ecebe6;
    --text-secondary: #b4b2a9;
    --text-muted: #8c8a83;
    --border: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.2);
    --accent: #85b7eb;
    --accent-fill: #378add;
    --accent-tint: #13314f;
    --accent-border: #2f6aa8;
    --up: #4cc79a;
    --down: #f08080;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #171716;
  --surface: #201f1e;
  --surface-muted: #2a2927;
  --text: #ecebe6;
  --text-secondary: #b4b2a9;
  --text-muted: #8c8a83;
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.2);
  --accent: #85b7eb;
  --accent-fill: #378add;
  --accent-tint: #13314f;
  --accent-border: #2f6aa8;
  --up: #4cc79a;
  --down: #f08080;
  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: 400 15px/1.8 Vazirmatn, Tahoma, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 24px; font-weight: 700; line-height: 1.5; margin: 0 0 4px; }
h2 { font-size: 17px; font-weight: 600; margin: 0; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--text-secondary); font-size: 13px; margin: 0; }
.muted span { color: var(--text-muted); margin-inline-start: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Numbers stay left to right and line up in columns. */
.num { direction: ltr; text-align: left; font-variant-numeric: tabular-nums; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 34px; padding: 0 14px; border-radius: var(--radius);
  font: inherit; font-size: 13px; font-weight: 500; white-space: nowrap; cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent-fill); color: var(--on-accent); border: 0; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent-border); }
.btn-outline:hover { background: var(--accent-tint); }

/* App banner */
.promo { background: var(--accent-tint); border-bottom: 1px solid var(--border); }
.promo-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; }
.promo-text { display: flex; align-items: center; gap: 14px; color: var(--accent); }
.promo-text strong { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 12px; font-size: 40px; font-weight: 800; line-height: 1.3; }
.promo-text small { display: block; font-size: 14px; margin-top: 2px; }
.promo-free {
  font-size: 16px; font-weight: 700; line-height: 1; padding: 6px 12px; border-radius: 999px;
  /* The page background as text keeps it readable on the green in both themes. */
  background: var(--up); color: var(--bg);
}
.promo-mark { flex: none; display: grid; place-items: center; width: 56px; height: 56px; border-radius: 14px; background: var(--accent-fill); }
.promo-mark svg { width: 30px; height: 30px; fill: none; stroke: var(--on-accent); stroke-width: 2; stroke-linejoin: round; }
/* The two buttons stacked, the same width, beside the title. */
.promo-actions { display: flex; flex-direction: column; gap: 8px; flex: none; }
.promo-actions .btn, .footer-actions .btn { gap: 8px; height: 40px; padding: 0 16px; font-size: 14px; }
.btn-icon { flex: none; width: 20px; height: 20px; fill: currentColor; }
.btn-icon-pwa { width: 30px; }

/* Wide screens have room beside the buttons for a much bigger title. */
@media (min-width: 1000px) {
  .promo-inner { padding-block: 20px; }
  .promo-text strong { font-size: 77px; line-height: 1.15; }
  .promo-text small { font-size: 16px; }
  .promo-free { font-size: 20px; padding: 8px 16px; }
  .promo-mark { width: 72px; height: 72px; border-radius: 18px; }
  .promo-mark svg { width: 38px; height: 38px; }
}

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 56px; }
.logo { display: flex; align-items: baseline; gap: 8px; color: var(--text); }
.logo:hover { text-decoration: none; }
.logo-fa { font-size: 20px; font-weight: 800; }
.logo-en { font-size: 11px; letter-spacing: 1.5px; color: var(--text-muted); }
.site-nav { display: flex; gap: 20px; font-size: 14px; }
.site-nav a { color: var(--text-secondary); }
.site-nav a[aria-current="page"] { color: var(--text); font-weight: 600; }

main { padding-bottom: 32px; }

.crumbs { font-size: 12px; color: var(--text-muted); padding-top: 16px; }
.crumbs a { color: var(--text-secondary); }

.hero { padding: 22px 0 8px; }

.search {
  display: flex; align-items: center; gap: 8px; margin-top: 14px;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 3px 3px 3px 3px;
}
.search svg { flex: none; width: 18px; height: 18px; margin-inline-start: 10px; fill: none; stroke: var(--text-muted); stroke-width: 2; }
.search input { flex: 1; min-width: 0; height: 34px; border: 0; background: transparent; color: var(--text); font: inherit; font-size: 14px; outline: none; }
.search input::placeholder { color: var(--text-muted); }
.search:focus-within { border-color: var(--accent-fill); box-shadow: 0 0 0 3px var(--accent-tint); }

/* Headline cards */
.kpis { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; padding: 12px 0; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; }
.kpi-label { font-size: 12px; color: var(--text-secondary); }
.kpi-value { font-size: 20px; font-weight: 600; text-align: right; }
.kpi .change { font-size: 12px; direction: ltr; text-align: right; }

/* Category chips */
.chips { display: flex; gap: 6px; padding: 6px 0 10px; overflow-x: auto; scrollbar-width: none; }
.chip {
  flex: none; font-size: 13px; padding: 4px 12px; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--text-secondary); background: var(--surface);
}
.chip:hover { text-decoration: none; border-color: var(--accent-border); color: var(--accent); }
.chip[aria-current="page"] { background: var(--accent-tint); border-color: var(--accent-border); color: var(--accent); }

.section { margin-top: 14px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
.section-head a { font-size: 13px; }

/* Price tables */
.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow-x: auto; }
table.prices { width: 100%; border-collapse: collapse; font-size: 14px; }
.prices th, .prices td { padding: 9px 12px; border-bottom: 1px solid var(--border); text-align: right; vertical-align: middle; }
.prices tbody tr:last-child > * { border-bottom: 0; }
.prices thead th { font-size: 12px; font-weight: 400; color: var(--text-muted); white-space: nowrap; }
.prices thead th.num { text-align: left; }
.prices tbody th { font-weight: 400; }
.prices .name { display: block; font-weight: 600; }
.prices .detail { display: block; font-size: 12px; color: var(--text-muted); }
.prices .value { font-weight: 500; white-space: nowrap; }
.prices .col-date, .prices .col-type { font-size: 12px; color: var(--text-secondary); white-space: nowrap; }
.prices td.col-date { direction: rtl; }
.prices tbody tr:hover { background: var(--surface-muted); }
.sources td { font-size: 13px; }

.change { white-space: nowrap; }
.change.up { color: var(--up); }
.change.down { color: var(--down); }
.change.flat { color: var(--text-muted); }

.spark { display: inline-block; vertical-align: middle; }
.spark polyline { fill: none; stroke-width: 1.5; stroke-linejoin: round; stroke-linecap: round; }
.spark.up polyline { stroke: var(--up); }
.spark.down polyline { stroke: var(--down); }

.pager { display: flex; flex-wrap: wrap; gap: 4px; justify-content: center; margin-top: 16px; font-size: 13px; }
.pager a, .pager span { min-width: 34px; padding: 4px 10px; border-radius: var(--radius); text-align: center; border: 1px solid var(--border); background: var(--surface); }
.pager span[aria-current] { background: var(--accent-tint); border-color: var(--accent-border); color: var(--accent); }

.empty { padding: 24px; text-align: center; color: var(--text-secondary); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }

/* FAQ */
.faq { margin-top: 24px; padding: 16px 18px; background: var(--surface-muted); border-radius: var(--radius); }
.faq h2 { margin-bottom: 6px; }
.faq details { border-bottom: 1px solid var(--border); padding: 8px 0; }
.faq summary { cursor: pointer; font-weight: 500; font-size: 14px; }
.faq details p, .faq > p { margin: 6px 0 0; font-size: 14px; color: var(--text-secondary); }
.faq > .muted { margin-top: 10px; }

.site-footer { background: var(--surface); border-top: 1px solid var(--border); color: var(--text-muted); font-size: 13px; }
.footer-inner { padding-block: 24px 16px; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-bottom: 20px; }
.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 13px; }
.footer-nav a { color: var(--text-secondary); }
.footer-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.footer-bottom { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 14px; border-top: 1px solid var(--border); }
.footer-bottom a { color: var(--accent); font-weight: 500; }

/* Phones: drop the less important columns, stack the banner. */
@media (max-width: 640px) {
  h1 { font-size: 20px; }
  .promo-inner { flex-direction: column; align-items: stretch; padding-block: 14px; }
  .promo-text strong { font-size: 28px; }
  .promo-free { font-size: 14px; padding: 5px 10px; }
  .promo-mark { width: 48px; height: 48px; }
  .promo-mark svg { width: 26px; height: 26px; }
  .promo-actions { flex-direction: row; }
  .promo-actions .btn { flex: 1; padding: 0 10px; }
  .site-nav { gap: 14px; font-size: 13px; }
  .kpis { grid-template-columns: minmax(0, 1fr); }
  .kpi { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
  .kpi-value { font-size: 17px; }
  .prices .col-trend, .prices .col-date { display: none; }
  .prices th, .prices td { padding: 8px 10px; }
  .search .btn { display: none; }
  .footer-actions { width: 100%; }
  .footer-actions .btn { flex: 1; padding: 0 10px; }
}