/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-board: 'Special Elite', 'Courier New', monospace;

  --felt-black: #1a1a1a;
  --felt-dark: #111111;
  --felt-groove: #0d0d0d;
  --letter-white: #f0ece4;
  --letter-shadow: rgba(0,0,0,0.6);
  --frame-color: #4a3728;
  --frame-light: #6b5240;
  --frame-dark: #2e1f14;

  --page-bg: #1c1b19;
  --surface: #242320;
  --surface-2: #2d2c2a;
  --text-primary: #e0dfdc;
  --text-muted: #8a8985;
  --accent: #d4a853;
  --accent-hover: #e0be72;
  --border: #393836;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--page-bg);
  display: flex;
  flex-direction: column;
}

/* ===== HEADER ===== */
header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo { color: var(--accent); }

h1 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* ===== MAIN ===== */
main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  width: 100%;
}

/* ===== BOARD GRID ===== */
.board-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.board-wrapper {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.board-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding-left: 4px;
}

/* ===== SIGNBOARD ===== */
.signboard {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 2px 8px rgba(0,0,0,0.4),
    0 8px 24px rgba(0,0,0,0.2);
}

.board-frame {
  background: var(--frame-color);
  padding: 8px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--frame-light);
  box-shadow:
    inset 0 1px 0 var(--frame-light),
    inset 0 -1px 0 var(--frame-dark);
}

/* Board felt background with grooves */
.board-textarea,
.board-display {
  width: 100%;
  background: var(--felt-black);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-board);
  font-size: clamp(16px, 2vw, 22px);
  line-height: 1.65;
  letter-spacing: 0.12em;
  color: var(--letter-white);
  text-transform: uppercase;
  padding: 12px 16px;
  resize: none;
  overflow: hidden;
  text-shadow:
    0 1px 3px var(--letter-shadow),
    0 0 1px rgba(255,255,255,0.1);
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent 0px,
      transparent calc(1.65em - 2px),
      rgba(0,0,0,0.35) calc(1.65em - 2px),
      rgba(0,0,0,0.5) calc(1.65em - 1px),
      rgba(30,30,30,0.3) calc(1.65em),
      transparent calc(1.65em + 1px)
    );
  background-position: 0 12px;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.3);
}

.board-textarea {
  outline: none;
  display: block;
  text-align: center;
}

.board-textarea::placeholder {
  color: rgba(240, 236, 228, 0.2);
  text-shadow: none;
}

.board-textarea:focus {
  box-shadow: inset 0 0 0 2px rgba(212, 168, 83, 0.3);
}

/* Display boards */
.board-display {
  min-height: calc(1.65em * 4 + 24px);
  white-space: pre;
  overflow: hidden;
  text-align: center;
}

.board-display .placeholder-char {
  color: rgba(240, 236, 228, 0.18);
  text-shadow: none;
}

/* ===== CONTROLS ===== */
.controls {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 20px;
  justify-content: center;
}

.btn-arrange {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 28px;
  background: var(--accent);
  color: #1a1a1a;
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background 180ms ease, transform 100ms ease;
  box-shadow: 0 2px 8px rgba(212, 168, 83, 0.25);
}

.btn-arrange:hover {
  background: var(--accent-hover);
}

.btn-arrange:active {
  transform: scale(0.97);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--surface-2);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease, transform 100ms ease;
}

.btn-secondary:hover {
  background: var(--surface);
  border-color: var(--text-muted);
}

.btn-secondary:active {
  transform: scale(0.97);
}

.lines-control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.lines-control select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
}

/* ===== LETTERBOX ===== */
.letterbox-section {
  margin-top: 20px;
  margin-bottom: 0;
}

.letterbox-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding-left: 4px;
}

.letterbox {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 52px;
  padding: 12px 16px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  align-items: center;
}

.letterbox:empty::before {
  content: 'Press "Arrange" to see letters needed';
  color: var(--text-muted);
  font-size: 13px;
  font-style: italic;
}

.letterbox-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 42px;
  background: #e8e2d6;
  border: 2px solid #c8c0b0;
  border-radius: 3px;
  font-family: var(--font-board);
  font-size: 20px;
  color: #1a1a1a;
  text-shadow: none;
  box-shadow:
    0 2px 4px rgba(0,0,0,0.25),
    inset 0 1px 0 rgba(255,255,255,0.6),
    inset 0 -1px 0 rgba(0,0,0,0.08);
  font-weight: 700;
}

/* ===== FOOTER ===== */
footer {
  padding: 16px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

footer a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 12px;
  transition: color 180ms ease;
}

footer a:hover {
  color: var(--text-primary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .board-grid {
    grid-template-columns: 1fr;
  }

  main {
    padding: 16px;
  }

  .board-textarea,
  .board-display {
    font-size: 16px;
  }

  .controls {
    flex-direction: column;
    gap: 12px;
  }
}

/* ===== PRINT-MODE CLASS (used by off-screen PDF clone only) ===== */
.print-mode,
.print-mode .board-frame,
.print-mode .letterbox { background: white; }
.print-mode { color: #000; }
.print-mode .board-label,
.print-mode .letterbox-label { color: #333; }
.print-mode .signboard { box-shadow: none; }
.print-mode .board-frame { border-color: #bbb; box-shadow: none; }
.print-mode .board-textarea,
.print-mode .board-display,
.print-mode .pdf-textarea-swap {
  background: white; background-image: none; color: #111;
  text-shadow: none; box-shadow: none; border: 1px solid #ccc; font-size: 16px;
}
.print-mode .board-display .placeholder-char { color: rgba(0,0,0,0.25); }
.print-mode .letterbox { border-color: #999; }
.print-mode .letterbox-letter { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
.print-mode .letterbox-section { break-inside: avoid; }
.print-mode .board-grid { grid-template-columns: 1fr; gap: 10px; }
.print-mode .board-wrapper { break-inside: avoid; page-break-inside: avoid; }

/* ===== PRINT MEDIA (browser print only — no JS class needed) ===== */
@media print {
  body { background: white !important; color: #000 !important; }
  header, footer, .controls { display: none !important; }
  main { padding: 0.5in; max-width: 100%; }

  .board-label, .letterbox-label { color: #333 !important; }
  .signboard { box-shadow: none !important; }
  .board-frame {
    background: white !important; border-color: #bbb !important; box-shadow: none !important;
  }
  .board-textarea, .board-display {
    background: white !important; background-image: none !important;
    color: #111 !important; text-shadow: none !important;
    box-shadow: none !important; border: 1px solid #ccc !important; font-size: 16px;
  }
  .board-display .placeholder-char { color: rgba(0,0,0,0.25) !important; }
  .letterbox { background: white !important; border-color: #999 !important; }
  .letterbox-letter { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .letterbox-section { break-inside: avoid; }
  .board-grid { grid-template-columns: 1fr !important; gap: 10px; }
  .board-wrapper { break-inside: avoid; page-break-inside: avoid; }
}