/* Early Signal Teleprompter — Iteration 1 */

:root {
  --color-black: #000000;
  --color-black-soft: #0a0a0a;
  --color-surface: #121212;
  --color-surface-alt: #1a1a1a;
  --color-white: #ffffff;
  --color-white-muted: #d9d9d9;
  --color-gray: #9a9a9a;
  --color-yellow: #ffb800;
  --color-yellow-bright: #ffd23f;
  --color-yellow-dim: #cf9500;
  --bg-primary: var(--color-black);
  --bg-secondary: var(--color-black-soft);
  --bg-card: var(--color-surface);
  --text-primary: var(--color-white);
  --text-secondary: var(--color-white-muted);
  --text-muted: var(--color-gray);
  --accent: var(--color-yellow);
  --accent-bright: var(--color-yellow-bright);
  --accent-dim: var(--color-yellow-dim);
  --border-color: #2a2a2a;
  --shadow-glow: 0 0 24px rgba(255, 184, 0, 0.25);
  --font-heading: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --speaker-1: #3db8ff;
  --speaker-2: #ffb800;
  --note: #cf9500;
  --touch: 44px;
  --max-read: 42rem;
  --radius: 10px;
}

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

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.5;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--accent);
  color: var(--color-black);
  padding: 0.75rem 1rem;
  font-weight: 600;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

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

button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
  outline: none;
}

.screen {
  min-height: 100vh;
}

.screen[hidden] {
  display: none !important;
}

/* ----- Setup ----- */

.screen--setup {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 40%);
  padding: 1.5rem 1rem 3rem;
}

.setup-header {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  text-align: center;
}

.setup-header h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.tagline {
  margin: 0.4rem 0 0;
  color: var(--text-muted);
  font-size: 1rem;
}

.setup-main {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.card-title {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.card-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.card-title-row .card-title {
  margin: 0;
}

.mode-toggle {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.mode-toggle--compact {
  margin-top: 0.25rem;
}

.mode-option {
  display: inline-flex;
  align-items: center;
  min-height: var(--touch);
  padding: 0 1rem;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--color-surface-alt);
  cursor: pointer;
  font-weight: 600;
  color: var(--text-secondary);
  transition: border-color 0.15s, color 0.15s, box-shadow 0.15s;
}

.mode-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.mode-option:has(input:checked) {
  border-color: var(--accent);
  color: var(--color-black);
  background: var(--accent);
  box-shadow: var(--shadow-glow);
}

.mode-option:has(input:focus-visible) {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
}

.script-input {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--color-black);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.55;
}

.script-input::placeholder {
  color: var(--text-muted);
}

.syntax-help {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.validation {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--accent-dim);
  background: rgba(255, 184, 0, 0.08);
  color: var(--accent-bright);
  font-size: 0.95rem;
}

.validation[hidden] {
  display: none !important;
}

.settings-grid {
  display: grid;
  gap: 1.1rem;
}

.setting label,
.fieldset-plain legend {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.fieldset-plain {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.setting-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.setting-control input[type="range"] {
  flex: 1;
  min-width: 0;
  accent-color: var(--accent);
  height: var(--touch);
}

.setting-value {
  min-width: 4.5rem;
  text-align: right;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch);
  min-width: var(--touch);
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--color-surface-alt);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn:hover {
  border-color: var(--accent-dim);
  color: var(--accent-bright);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--secondary {
  background: transparent;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--color-black);
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  color: var(--color-black);
}

.btn--large {
  width: 100%;
  min-height: 52px;
  font-size: 1.1rem;
}

.btn--accent {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--color-black);
}

.btn--accent:hover {
  background: var(--accent-bright);
  color: var(--color-black);
}

.btn--icon {
  font-size: 1rem;
  padding: 0 0.75rem;
}

.btn--control {
  flex: 1 1 auto;
  min-width: 5.5rem;
}

.setup-actions {
  margin-top: 0.25rem;
}

/* ----- Reading ----- */

.screen--reading {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  background: var(--bg-primary);
  overflow: hidden;
}

.reading-chrome {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.progress-wrap {
  flex: 1;
  min-width: 0;
}

.progress-text {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  font-variant-numeric: tabular-nums;
}

.progress-bar {
  height: 6px;
  background: var(--color-surface-alt);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: inherit;
  transition: width 0.2s ease;
}

.chrome-actions {
  display: flex;
  gap: 0.35rem;
  flex-shrink: 0;
}

.solo-viewport {
  flex: 1;
  overflow: hidden;
  position: relative;
  padding: 2rem 1.25rem 1rem;
}

.solo-content {
  max-width: var(--max-read);
  margin: 0 auto;
  padding-top: 28vh;
  padding-bottom: 55vh;
  will-change: transform;
  transform: translateY(0);
}

.solo-content p {
  margin: 0 0 1.4em;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.45;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.two-viewport {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
  padding: 1.5rem 1.25rem;
  max-width: var(--max-read);
  width: 100%;
  margin: 0 auto;
}

.cue {
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
}

.cue--active {
  box-shadow: var(--shadow-glow);
  border-color: rgba(255, 184, 0, 0.35);
}

.cue--next {
  opacity: 0.48;
  transform: scale(0.97);
  transform-origin: top center;
}

.cue--next[hidden],
.cue[hidden] {
  display: none !important;
}

.cue-speaker {
  margin: 0 0 0.5rem;
  font-size: 0.8em;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.cue-text {
  margin: 0;
  font-weight: 500;
  line-height: 1.4;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.cue--speaker-1 .cue-speaker { color: var(--speaker-1); }
.cue--speaker-2 .cue-speaker { color: var(--speaker-2); }
.cue--note {
  border-style: dashed;
  border-color: var(--note);
  background: rgba(207, 149, 0, 0.08);
}
.cue--note .cue-speaker { color: var(--note); }
.cue--general .cue-speaker { color: var(--text-muted); }

.completion-message {
  text-align: center;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-bright);
  margin: 0;
}

.completion-message[hidden] {
  display: none !important;
}

.reading-controls {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  padding: 0.75rem 1rem calc(0.75rem + env(safe-area-inset-bottom, 0));
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.reading-speed-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1 1 100%;
  min-height: var(--touch);
}

.reading-speed-wrap[hidden] {
  display: none !important;
}

.reading-speed-wrap input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.countdown-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.82);
}

.countdown-overlay[hidden] {
  display: none !important;
}

.countdown-number {
  font-size: clamp(4rem, 18vw, 8rem);
  font-weight: 700;
  color: var(--accent);
  text-shadow: var(--shadow-glow);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 560px) {
  .reading-controls .btn--control {
    flex: 1 1 calc(50% - 0.5rem);
  }
}