:root {
  --bg: #0a0a0a;
  --bg-void: #050505;
  --bg-panel: #111110;
  --border: rgba(239, 236, 228, 0.1);
  --border-strong: rgba(239, 236, 228, 0.22);
  --text: #efece4;
  --muted: #8a877d;
  --accent-navy: #1c2a44;
  --accent-red: #b3392c;
  --accent-bone: #e9e4d8;
  --gradient: linear-gradient(90deg, var(--accent-navy) 0%, var(--accent-red) 55%, var(--accent-bone) 100%);
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Fixed film-grain overlay, in the spirit of the textured-gradient reference */
.grain {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.app {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.gradient-bar {
  height: 5px;
  margin: 0 -20px 48px;
  background: var(--gradient);
}

header {
  text-align: center;
  margin-bottom: 40px;
}

.kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

header h1 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-style: italic;
  font-size: 2.6rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

header h1 .tm {
  font-style: normal;
  font-size: 0.9rem;
  vertical-align: super;
  opacity: 0.55;
  margin-left: 2px;
}

.spec {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.input-section,
.controls {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 24px;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.word-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

button,
.file-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 0;
  padding: 9px 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, opacity 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

button:hover:not(:disabled),
.file-btn:hover {
  background: var(--text);
  color: var(--bg);
}

button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

button.primary {
  background: var(--gradient);
  border-color: transparent;
  color: var(--bg-void);
  font-weight: 700;
}

button.primary:hover:not(:disabled) {
  background: var(--gradient);
  color: var(--bg-void);
  filter: brightness(1.12);
}

button.danger {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

button.danger:hover:not(:disabled) {
  background: var(--accent-red);
  color: var(--accent-bone);
}

.text-display {
  min-height: 260px;
  max-height: 420px;
  overflow-y: auto;
  background: var(--bg-void);
  border: 1px solid var(--border);
  padding: 22px;
  font-family: var(--font-serif);
  line-height: 1.75;
  font-size: 1.15rem;
  color: var(--text);
  outline: none;
  white-space: pre-wrap;
}

.text-display:empty::before {
  content: attr(data-placeholder);
  color: var(--muted);
  font-style: italic;
}

.text-display .word-highlight {
  background: rgba(179, 57, 44, 0.32);
  box-shadow: inset 0 -2px 0 var(--accent-red);
}

.transport {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
}

.transport button {
  flex: 1;
  justify-content: center;
  padding: 13px 14px;
  font-size: 0.82rem;
}

.settings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 18px;
  margin-bottom: 16px;
}

.setting {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.setting label span {
  color: var(--text);
}

select {
  width: 100%;
  background: var(--bg-void);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 0;
  padding: 9px 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

input[type="range"] {
  width: 100%;
  height: 16px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--border-strong);
}

input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--border-strong);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  margin-top: -6px;
  width: 14px;
  height: 14px;
  background: var(--accent-bone);
  border: 1px solid var(--bg);
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 0;
  background: var(--accent-bone);
  border: 1px solid var(--bg);
}

.status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

footer {
  text-align: center;
  margin-top: 32px;
}

footer .spec {
  color: var(--muted);
}

@media (max-width: 480px) {
  .transport {
    flex-direction: column;
  }

  header h1 {
    font-size: 2.1rem;
  }
}