@font-face {
  font-family: "HayyakumAllah";
  src: url("fonts/HayyakumAllah-Light.ttf") format("truetype");
  font-weight: 300;
  font-display: swap;
}
@font-face {
  font-family: "HayyakumAllah";
  src: url("fonts/HayyakumAllah-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "HayyakumAllah";
  src: url("fonts/HayyakumAllah-Medium.ttf") format("truetype");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "HayyakumAllah";
  src: url("fonts/HayyakumAllah-Bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}

:root {
  /* Forest */
  --forest-900: #002623;
  --forest-700: #054239;
  --forest-500: #428177;
  /* Golden Wheat */
  --wheat-700: #988561;
  --wheat-500: #b9a779;
  --wheat-100: #edebe0;
  /* Deep Umber */
  --umber-900: #260f14;
  --umber-700: #4a151e;
  --umber-500: #6b1f2a;
  /* Charcoal */
  --charcoal-900: #161616;
  --charcoal-700: #3d3a3b;
  --white: #ffffff;

  /* Semantic tokens */
  --bg: var(--forest-900);
  --surface: var(--forest-700);
  --surface-2: #0a4d43;
  --accent: var(--wheat-500);
  --accent-strong: var(--wheat-100);
  --accent-muted: var(--wheat-700);
  --text: var(--white);
  --text-muted: var(--wheat-100);
  --on-accent: var(--forest-900);
  --border: rgba(185, 167, 121, 0.35);
  --highlight: var(--forest-500);
  --danger-bg: var(--umber-700);
  --danger-border: var(--umber-500);
  --radius: 16px;
  --font: "HayyakumAllah", "SF Arabic", "Geeza Pro", "Segoe UI", "Noto Sans Arabic", Tahoma, system-ui, sans-serif;
  color-scheme: dark;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
}

button, input { font: inherit; color: inherit; }
button { cursor: pointer; }

[hidden] { display: none !important; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: calc(12px + env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 100vh;
  min-height: 100dvh;
}

main { display: flex; flex-direction: column; gap: 16px; }

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 4px;
}

.app-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  flex: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--accent);
  transition: background-color .15s, border-color .15s;
}
.icon-btn:hover { background: var(--surface-2); border-color: var(--accent); }
.icon-btn.small { width: 40px; height: 40px; }

/* Tabs */
.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

.tab {
  min-height: 48px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font-weight: 500;
  transition: background-color .15s, color .15s;
}
.tab-code { font-size: .8em; opacity: .8; }
.tab[aria-selected="true"] {
  background: var(--accent);
  color: var(--on-accent);
}

/* Converter card */
.card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 16px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: .95rem; color: var(--text-muted); font-weight: 500; }

.input-wrap {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  transition: border-color .15s, box-shadow .15s;
}
.input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(185, 167, 121, 0.2);
}
.input-wrap:has(input:focus-visible) { outline: none; }

.amount {
  flex: 1;
  min-width: 0;
  min-height: 60px;
  padding: 8px 16px;
  border: 0;
  background: transparent;
  font-size: 1.6rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.amount.long { font-size: 1.25rem; }
.amount.xlong { font-size: 1rem; }
.amount:focus, .amount:focus-visible { outline: none; }
.amount::placeholder { color: rgba(237, 235, 224, 0.35); }

.unit {
  flex: none;
  padding-inline: 16px 14px;
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
  border-inline-start: 1px solid var(--border);
  /* unit sits on the visual left in RTL */
  order: 2;
}

.swap-mark {
  display: grid;
  place-items: center;
  color: var(--accent);
  margin-top: 4px;
}

.old-sp {
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
}
.old-sp .input-wrap { background: rgba(185, 167, 121, 0.08); }

/* Rates */
.rates { text-align: center; color: var(--text-muted); font-size: .95rem; }
.rates p { margin: 0; }
.rates-line {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px 10px;
}
.rates-line bdi { color: var(--accent); font-weight: 700; }
.rates-updated { margin-top: 4px !important; font-size: .82rem; opacity: .85; }
.sep { color: var(--accent); }

/* Buttons */
.btn {
  min-height: 52px;
  padding: 10px 20px;
  border-radius: 12px;
  border: 1.5px solid var(--accent);
  font-weight: 700;
  font-size: 1.05rem;
  transition: background-color .15s, color .15s;
}
.btn.primary { background: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover { background: rgba(185, 167, 121, 0.12); }

.text-btn {
  align-self: center;
  min-height: 44px;
  padding: 8px 14px;
  border: 0;
  background: none;
  color: var(--accent);
  font-size: .95rem;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Install banner */
.install {
  padding: 16px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--surface);
}
.install-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.install h2 { margin: 0; font-size: 1.05rem; color: var(--accent); }
.install h3 { margin: 12px 0 4px; font-size: .95rem; }
.install ol { margin: 0; padding-inline-start: 22px; color: var(--text-muted); }
.install li { margin-block: 2px; }
.install-btn { width: 100%; margin-top: 12px; }
.inline-icon { vertical-align: -3px; color: var(--accent); }

.app-footer { margin-top: auto; display: flex; justify-content: center; }

/* Settings bottom sheet */
.sheet {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  margin: auto auto 0;
  padding: 0;
  border: 1px solid var(--border);
  border-bottom: 0;
  border-radius: 20px 20px 0 0;
  background: var(--surface);
  color: var(--text);
}
.sheet::backdrop { background: rgba(22, 22, 22, 0.75); }
.sheet[open] { animation: sheet-up .22s ease-out; }

.sheet form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 10px 16px calc(16px + env(safe-area-inset-bottom));
}
.sheet h2 { margin: 0; font-size: 1.2rem; color: var(--accent); }
.sheet-handle {
  width: 44px;
  height: 5px;
  margin: 0 auto 4px;
  border-radius: 999px;
  background: var(--border);
}
.sheet-actions { display: grid; grid-template-columns: 2fr 1fr; gap: 10px; }
.form-error {
  margin: 0;
  padding: 10px 14px;
  border: 1px solid var(--danger-border);
  border-radius: 10px;
  background: var(--danger-bg);
  color: var(--wheat-100);
  font-size: .95rem;
}
.input-wrap.invalid { border-color: var(--danger-border); box-shadow: 0 0 0 3px rgba(107, 31, 42, 0.6); }

@keyframes sheet-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

/* Toast */
.toast {
  position: fixed;
  inset-inline: 16px;
  bottom: calc(24px + env(safe-area-inset-bottom));
  max-width: 360px;
  margin: 0 auto;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  text-align: center;
  box-shadow: 0 8px 24px rgba(22, 22, 22, 0.5);
}

/* Larger screens */
@media (min-width: 640px) {
  .app { padding-top: 40px; gap: 20px; }
  .app-title { font-size: 1.6rem; }
  .card { padding: 28px 24px 16px; }
  .sheet {
    margin: auto;
    border-bottom: 1px solid var(--border);
    border-radius: 20px;
  }
  .sheet[open] { animation: none; }
  .sheet-handle { display: none; }
  .sheet form { padding: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}