/* ============================================================================
   QWERTIDE — Terminal-mono design system
   ----------------------------------------------------------------------------
   Aesthetic: dark terminal, single warm accent, mono for type + numbers.
   Honesty note: this is hand-built CSS, not a design-system package. MudBlazor
   provides the providers/snackbar/form primitives; the game canvas, caret, and
   stat bar are custom because Material defaults fight the terminal language.

   LOCKS (audited before shipping):
   - Color: ONE accent (--accent, amber). Red (--error) is reserved strictly for
     typing errors (real semantic state), never decoration. No second accent.
   - Shape: interactive = 4px radius, panels = 8px, caret = 1px. One scale.
   - Theme: dark only, locked page-wide. No section inverts.
   - Em-dash: zero. Hyphens only.
============================================================================ */

:root {
  /* surfaces */
  --bg:          #0e0e10;   /* page, off-black (never #000) */
  --bg-elev:     #161619;   /* panels */
  --bg-elev-2:   #1d1d21;   /* raised controls */
  --border:      #2a2a31;   /* visible hairline */
  --border-soft: #1f1f25;   /* faint divider */

  /* text */
  --text:        #d4d4d8;   /* default body */
  --text-bright: #f4f4f5;   /* correctly-typed glyphs, headings */
  --text-muted:  #6b6b73;   /* upcoming/untyped glyphs (large text, passes AA) */
  --text-faint:  #7c7c83;   /* meta, captions, small labels (raised to clear WCAG AA on small text) */

  /* accent (locked, single) */
  --accent:      #e2b340;   /* amber: caret, primary CTA, active stat */
  --accent-dim:  #8a6d28;
  --accent-soft: rgba(226, 179, 64, 0.14);   /* subtle wash, NOT a neon glow */

  /* semantic error state ONLY */
  --error:       #e5484d;
  --error-bg:    rgba(229, 72, 77, 0.13);

  /* type */
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Code", monospace;
  --font-ui:   "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* shape scale (locked) */
  --r-interactive: 4px;
  --r-panel: 8px;

  /* motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.14s;
  --t-mid: 0.28s;

  --shell-max: 1100px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#app {
  min-height: 100dvh;          /* never h-screen: avoids iOS address-bar jump */
  display: flex;
  flex-direction: column;
}

h1, h2, h3 {
  font-family: var(--font-ui);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-bright);
  margin: 0;
}

a { color: inherit; text-decoration: none; }

/* Blazor's <FocusOnNavigate> programmatically focuses the page <h1> on each route
   change (a screen-reader aid). Such elements get tabindex="-1" and would show the
   browser's default focus ring; suppress it since they are never keyboard-tabbable.
   Real interactive controls keep their :focus-visible outline (see .q-btn). */
[tabindex="-1"]:focus { outline: none; }

.mono { font-family: var(--font-mono); font-feature-settings: "tnum" 1; }
.tnum { font-variant-numeric: tabular-nums; } /* numbers don't jitter while live */

/* ---- App shell ---------------------------------------------------------- */
.q-shell {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 24px;
}

.q-nav {
  height: 64px;                /* cap: <= 80px, single line */
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-soft);
}
.q-brand {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.04em;
  font-size: 1.05rem;
  color: var(--text-bright);
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
}
.q-brand .q-brand-accent { color: var(--accent); }
.q-nav-links { display: flex; gap: 28px; align-items: center; }
.q-nav-link {
  font-size: 0.86rem;
  color: var(--text-muted);
  transition: color var(--t-fast) var(--ease);
  font-family: var(--font-mono);
}
.q-nav-link:hover { color: var(--text); }
.q-nav-link.active { color: var(--accent); }

.q-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.q-footer {
  border-top: 1px solid var(--border-soft);
  padding: 18px 0;
  color: var(--text-faint);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

/* ---- Buttons (one shape scale, amber primary) --------------------------- */
.q-btn {
  font-family: var(--font-ui);
  font-weight: 500;
  font-size: 0.92rem;
  border-radius: var(--r-interactive);
  padding: 11px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  line-height: 1;
}
.q-btn:active { transform: translateY(1px); }       /* tactile push */

/* primary: amber fill, dark text. Contrast checked: #0e0e10 on #e2b340 ~ 9:1 */
.q-btn-primary {
  background: var(--accent);
  color: #14110a;
  font-weight: 600;
}
.q-btn-primary:hover { background: #eebf53; }

/* secondary: ghost with border */
.q-btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.q-btn-ghost:hover { border-color: var(--text-muted); color: var(--text-bright); }

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

/* ---- The typing canvas (signature surface) ------------------------------ */
.q-game {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100dvh - 64px);   /* fill viewport under nav, no scroll cue */
  padding: 40px 0 80px;
}

.q-passage-wrap { position: relative; }

/* fixed-height window: ~3 lines visible; longer passages scroll the caret line
   into view (see qwertide.js followCaret). Owns the font-size + width so the
   line-height math that sizes the window stays correct. */
.q-passage-viewport {
  position: relative;
  overflow: hidden;
  font-family: var(--font-mono);     /* so 60ch below = 60 mono chars exactly */
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  height: calc(1.85em * 3);          /* line-height (1.85) x 3 visible lines */
  width: min(60ch, 100%);            /* definite mono box: text wraps at 60 chars */
  margin: 0 auto;
  /* soft fade only at the bottom so upcoming lines ease in; the first line
     (short passages pin to the top) stays crisp. */
  -webkit-mask-image: linear-gradient(to bottom, #000 calc(100% - 1.6em), transparent 100%);
          mask-image: linear-gradient(to bottom, #000 calc(100% - 1.6em), transparent 100%);
}

/* the passage: each glyph is a span; caret rides the current one */
.q-passage {
  font-family: var(--font-mono);
  font-size: inherit;                /* from the viewport */
  line-height: 1.85;
  letter-spacing: 0.01em;
  color: var(--text-muted);          /* upcoming text reads dim */
  width: 100%;                       /* fill the viewport box and wrap within it */
  white-space: normal;               /* lines break at the spaces between words... */
  user-select: none;
  outline: none;
  will-change: transform;
  transition: transform 0.18s var(--ease);   /* smooth line-scroll (see followCaret) */
}

/* ...and a word's glyphs are kept on one line, so a word never splits mid-glyph */
.q-word { white-space: nowrap; }

.char { position: relative; transition: color var(--t-fast) linear; }
.char.correct   { color: var(--text-bright); }
.char.incorrect { color: var(--error); background: var(--error-bg); border-radius: 2px; }
/* space typed wrong gets an underline so it is visible even with no glyph */
.char.incorrect.space { background: var(--error-bg); text-decoration: underline; text-decoration-color: var(--error); }

/* caret: 2px amber bar at the left edge of the current glyph */
.char.current::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0.14em;
  bottom: 0.14em;
  width: 2px;
  border-radius: 1px;
  background: var(--accent);
  animation: caret-blink 1.05s steps(1) infinite;
}
@keyframes caret-blink { 0%, 55% { opacity: 1; } 56%, 100% { opacity: 0; } }

/* blurred / waiting state before focus */
.q-passage.is-blurred { filter: blur(4px); opacity: 0.55; transition: filter var(--t-mid) var(--ease); }
.q-focus-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--text);
  cursor: pointer;
}
.q-focus-hint kbd {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--r-interactive);
  padding: 2px 8px;
  margin: 0 4px;
  font-size: 0.82rem;
}

/* hidden capture input (off-screen, keeps focus) */
.q-capture {
  position: absolute;
  opacity: 0;
  width: 1px; height: 1px;
  padding: 0; border: 0;
  left: -9999px;
}

/* ---- Live stat bar ------------------------------------------------------ */
.q-statbar {
  display: flex;
  gap: 36px;
  justify-content: center;
  margin-bottom: 44px;
  min-height: 56px;
}
.q-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.q-stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.9rem;
  font-weight: 600;
  color: var(--text-bright);
  line-height: 1;
}
.q-stat-value.is-live { color: var(--accent); }
.q-stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* difficulty / length selector pills */
.q-segment {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--r-interactive);
  overflow: hidden;
  background: var(--bg-elev);
}
.q-segment button {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: transparent;
  border: 0;
  color: var(--text-muted);
  padding: 9px 16px;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.q-segment button:hover { color: var(--text); }
.q-segment button.active { background: var(--accent-soft); color: var(--accent); }
.q-segment button:not(:last-child) { border-right: 1px solid var(--border-soft); }

/* ---- Generic page header (results, leaderboard) ------------------------- */
.q-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.q-page-pad { padding: 56px 0 80px; }

/* ---- Results ------------------------------------------------------------ */
.q-result-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-panel);
  overflow: hidden;
  margin: 32px 0;
}
.q-result-cell {
  background: var(--bg-elev);
  padding: 28px 26px;
}
.q-result-cell .big {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 600;
  line-height: 1;
  color: var(--accent);
}
.q-result-cell .big.neutral { color: var(--text-bright); }
.q-result-cell .unit { font-size: 0.4em; color: var(--text-faint); margin-left: 6px; }
.q-result-cell .cap {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 10px;
}
.q-result-secondary {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 0.9rem;
}
.q-result-secondary b { color: var(--text-bright); font-weight: 600; }

.q-save-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; margin-top: 8px; }
.q-field { display: flex; flex-direction: column; gap: 6px; }
.q-field label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.q-input {
  font-family: var(--font-mono);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-interactive);
  color: var(--text-bright);
  padding: 10px 14px;
  font-size: 0.95rem;
  min-width: 220px;
  transition: border-color var(--t-fast) var(--ease);
}
.q-input::placeholder { color: var(--text-faint); }
.q-input:focus { outline: none; border-color: var(--accent); }

/* ---- Leaderboard -------------------------------------------------------- */
.q-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); }
.q-table thead th {
  text-align: left;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-weight: 500;
  padding: 0 16px 14px;
  border-bottom: 1px solid var(--border);   /* single divider above group, not per-row top+bottom */
}
.q-table thead th.num, .q-table tbody td.num { text-align: right; font-variant-numeric: tabular-nums; }
.q-table tbody td {
  padding: 15px 16px;
  font-size: 0.95rem;
  color: var(--text);
  border-bottom: 1px solid var(--border-soft);  /* one hairline between rows only */
}
.q-table tbody tr { transition: background var(--t-fast) var(--ease); }
.q-table tbody tr:hover { background: var(--bg-elev); }
.q-table tbody tr.is-you { background: var(--accent-soft); }
.q-table tbody tr.is-you td { color: var(--text-bright); }
.q-rank { color: var(--text-faint); width: 3ch; }
.q-rank.top { color: var(--accent); font-weight: 700; }
.q-wpm { color: var(--accent); font-weight: 600; }

/* empty + loading states */
.q-empty {
  text-align: center;
  padding: 64px 0;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.q-skeleton-row {
  height: 18px;
  margin: 18px 16px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--bg-elev) 25%, var(--bg-elev-2) 50%, var(--bg-elev) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.3s linear infinite;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ---- Hero / start type lockup ------------------------------------------- */
.q-hero { text-align: center; max-width: 56ch; margin: 0 auto; }
.q-hero h1 {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6vw, 4rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
}
.q-hero h1 .accent { color: var(--accent); }
.q-hero p {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.6;
  max-width: 48ch;
  margin: 18px auto 0;
}

/* entry transitions (gated by reduced-motion below) */
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.q-rise { animation: rise 0.55s var(--ease) both; }
.q-rise-2 { animation: rise 0.55s var(--ease) 0.08s both; }
.q-rise-3 { animation: rise 0.55s var(--ease) 0.16s both; }

/* ---- Mobile collapse (explicit; desktop is primary target) -------------- */
@media (max-width: 768px) {
  .q-shell { padding: 0 18px; }
  .q-result-grid { grid-template-columns: 1fr; }
  .q-statbar { gap: 24px; }
  .q-passage-viewport { font-size: 1.3rem; }
  .q-nav-links { gap: 18px; }
}

/* ---- Reduced motion (mandatory, MOTION_INTENSITY 6) --------------------- */
@media (prefers-reduced-motion: reduce) {
  .char.current::before { animation: none; opacity: 1; }
  .q-skeleton-row { animation: none; }
  .q-rise, .q-rise-2, .q-rise-3 { animation: none; }
  .q-passage { transition: none; }
  .q-passage.is-blurred { transition: none; }
  * { scroll-behavior: auto !important; }
}