/* Murphy Test Prep — shared design tokens and base styles */
:root {
  --mint: #A1D6B0;          /* logo color */
  --mint-ink: #24583A;      /* readable green text on light backgrounds */
  --mint-soft: #EAF5ED;
  --purple: #6B4FA0;
  --purple-ink: #4A3378;
  --purple-soft: #EFEAF7;
  --bg: #FFFFFF;
  --soft-bg: #F3F6F4;
  --surface: #FFFFFF;
  --ink: #18201B;
  --muted: #5B6A60;
  --line: #D9E1DB;
  --good: #2E9A5B;
  --bad: #C7362B;
  --warn: #E8902C;
  --idle: #C9CFCB;
  --mark: #FFF1A8;
  --figure-bg: #FFFFFF;
  --f-ui: "Figtree", "Segoe UI", system-ui, sans-serif;
  --f-q: "Source Serif 4", Georgia, "Times New Roman", serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --radius: 12px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --mint-ink: #A1D6B0; --mint-soft: #14201A; --purple: #8D73C4; --purple-ink: #C4B3EA; --purple-soft: #1C1726;
  --bg: #000000; --soft-bg: #121614; --surface: #0E1110; --ink: #E9EFEA; --muted: #9AAAA0; --line: #2A332D;
  --good: #5FC788; --bad: #FF7B6E; --warn: #F2A552; --idle: #3F4943; --mark: #5C5220; --figure-bg: #F4F6F4;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--f-ui); font-size: 16px; line-height: 1.55; }
img { max-width: 100%; height: auto; }
a { color: var(--mint-ink); }
button { font: inherit; color: inherit; cursor: pointer; }
button:disabled { cursor: default; opacity: .5; }
:focus-visible { outline: 3px solid var(--mint); outline-offset: 2px; }
.wrap { max-width: 1080px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left)); padding-right: max(16px, env(safe-area-inset-right)); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 999px; padding: 10px 20px; font-weight: 700; border: 2px solid var(--ink); background: var(--surface); text-decoration: none; color: var(--ink); }
.btn.mint { background: var(--mint); border-color: var(--mint); color: #163020; }
.btn.purple { background: var(--purple); border-color: var(--purple); color: #fff; }
.btn.ghost { border-color: var(--line); }
.btn.small { padding: 6px 14px; font-size: 14px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* progress bars */
.pbar { display: flex; height: 14px; border-radius: 999px; overflow: hidden; background: var(--idle); }
.pbar span { display: block; height: 100%; transition: width .4s ease; }
.pbar .g { background: var(--good); } .pbar .r { background: var(--bad); } .pbar .o { background: var(--warn); } .pbar .x { background: var(--idle); }
.legend { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 13px; color: var(--muted); margin-top: 8px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }

/* dialogs */
dialog { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); color: var(--ink); padding: 0; width: min(520px, calc(100vw - 32px)); max-height: calc(100vh - 48px); }
dialog::backdrop { background: rgba(10, 20, 14, .45); }
.dlg { padding: 20px 22px; display: grid; gap: 14px; }
.dlg-head { display: flex; align-items: center; gap: 10px; }
.dlg-head h2 { margin: 0; font-size: 20px; }
.dlg-head .x { margin-left: auto; border: 0; background: none; font-size: 24px; line-height: 1; padding: 4px 8px; color: var(--muted); }
.field { display: grid; gap: 4px; font-size: 14px; font-weight: 600; }
.field input { font: inherit; font-weight: 400; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); }
.tabs { display: flex; gap: 4px; background: var(--bg); border-radius: 999px; padding: 4px; }
.tabs button { flex: 1; border: 0; background: none; border-radius: 999px; padding: 8px; font-weight: 700; color: var(--muted); }
.tabs button[aria-selected="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.form-error { color: var(--bad); font-size: 14px; min-height: 1em; margin: 0; }
.fine { font-size: 13px; color: var(--muted); margin: 0; }

/* flashcard term popover */
a.term { color: var(--mint-ink); font-weight: 600; text-decoration: underline dotted; text-underline-offset: 3px; cursor: pointer; }
.card-field h4 { margin: 0 0 4px; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.card-field div { font-family: var(--f-q); font-size: 16px; overflow-wrap: anywhere; }
.card-field.formula div { background: var(--mint-soft); border-radius: 8px; padding: 8px 12px; overflow-x: auto; }
.chip { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
mjx-container { max-width: 100%; overflow-x: auto; overflow-y: hidden; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

/* day / night toggle */
.theme-toggle { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 6px 12px; font-size: 13px; font-weight: 700; line-height: 1.2; }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle.icon-only .lbl { display: none; }
.theme-toggle.icon-only { padding: 7px; }
@media (max-width: 640px) { .theme-toggle .lbl { display: none; } .theme-toggle { padding: 7px; } }