:root {
  --f1-red: #e10600;
  --f1-red-dark: #b30500;
  --bg: #0a0a0f;
  --bg-2: #14141c;
  --card: #16161e;
  --card-border: #2a2a35;
  --text: #f3f3f5;
  --text-dim: #8a8a97;
  --accent: #e10600;
  --blue: #1d9bf0;
  --radius: 16px;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Faint diagonal speed lines in the background */
.track-lines {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 10%, rgba(225, 6, 0, 0.12), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(29, 155, 240, 0.08), transparent 40%),
    repeating-linear-gradient(115deg, transparent 0 38px, rgba(255, 255, 255, 0.015) 38px 40px);
}

.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 620px;
  margin: 0 auto;
  padding: 40px 20px 24px;
  flex: 1;
}

/* ---- Hero ---- */
.hero { text-align: center; margin-bottom: 30px; }

.hero h1 {
  font-size: clamp(2.2rem, 8vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.02;
  text-transform: uppercase;
}

.hero h1 .accent {
  color: var(--f1-red);
  text-shadow: 0 0 30px rgba(225, 6, 0, 0.5);
}

.hero h1 .flag { -webkit-text-fill-color: initial; }

.subtitle {
  margin-top: 14px;
  color: var(--text-dim);
  font-size: 1rem;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Controls ---- */
.controls { margin-bottom: 24px; }

.mode-toggle {
  display: flex;
  gap: 8px;
  background: var(--bg-2);
  padding: 6px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  margin-bottom: 18px;
}

.mode-btn {
  flex: 1;
  padding: 10px 8px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.mode-btn:hover { color: var(--text); }

.mode-btn.active {
  background: var(--f1-red);
  color: #fff;
  box-shadow: 0 4px 14px rgba(225, 6, 0, 0.4);
}

/* ---- Focus filter panel ---- */
.focus-panel {
  background: var(--bg-2);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  margin-bottom: 18px;
  overflow: hidden;
}

.focus-panel summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}

.focus-panel summary::-webkit-details-marker { display: none; }

.focus-panel summary::after {
  content: "▾";
  margin-left: auto;
  color: var(--text-dim);
  transition: transform 0.2s;
}

.focus-panel[open] summary::after { transform: rotate(180deg); }

.focus-summary {
  color: var(--f1-red);
  font-weight: 600;
  font-size: 0.82rem;
  background: rgba(225, 6, 0, 0.12);
  padding: 3px 10px;
  border-radius: 999px;
}

.focus-body { padding: 0 18px 16px; }

.focus-group { margin-bottom: 14px; }

.focus-group-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.focus-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  font-weight: 700;
}

.focus-clear {
  border: none;
  background: none;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  text-decoration: underline;
}
.focus-clear:hover { color: var(--text); }

.chip-row { display: flex; flex-wrap: wrap; gap: 7px; }

.chip {
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.82rem;
  padding: 6px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.chip:hover { color: var(--text); border-color: #3a3a48; }

.chip.on {
  background: var(--f1-red);
  border-color: var(--f1-red);
  color: #fff;
  font-weight: 600;
}

/* Custom (user-added) chips: dashed accent + inline remove button. */
.chip.custom { border-style: dashed; padding-right: 7px; }
.chip.custom.on { border-style: solid; }

.chip-x {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  margin-left: 6px;
  border-radius: 50%;
  font-size: 0.9rem;
  line-height: 1;
  color: inherit;
  opacity: 0.55;
  transition: opacity 0.15s, background 0.15s;
}
.chip-x:hover { opacity: 1; background: rgba(255, 255, 255, 0.18); }

/* Add-your-own row */
.chip-add { display: flex; gap: 7px; margin-top: 10px; }

.chip-add-input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text);
  font-family: inherit;
  font-size: 0.82rem;
  padding: 7px 12px;
  border-radius: 999px;
  outline: none;
  transition: border-color 0.15s;
}
.chip-add-input::placeholder { color: var(--text-dim); }
.chip-add-input:focus { border-color: var(--f1-red); }

.chip-add-btn {
  border: 1px solid var(--card-border);
  background: var(--bg-2);
  color: var(--text);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.chip-add-btn:hover { background: #1e1e28; border-color: #3a3a48; }

.focus-hint {
  color: var(--text-dim);
  font-size: 0.78rem;
  margin-top: 2px;
}

/* ---- Vagueness slider ---- */
.vague-control {
  background: var(--bg-2);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 18px;
  overflow: hidden;
  animation: reveal 0.28s ease;
}

.vague-control.hidden { display: none; }

@keyframes reveal {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.vague-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}

.vague-title { font-weight: 700; font-size: 0.95rem; }

.vague-level {
  color: var(--f1-red);
  font-weight: 600;
  font-size: 0.9rem;
}

.vague-ends {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  color: var(--text-dim);
  font-size: 0.75rem;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--f1-red), #ff6b66);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--f1-red);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--f1-red);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  cursor: pointer;
}

.generate-btn {
  width: 100%;
  padding: 18px;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--f1-red), var(--f1-red-dark));
  color: #fff;
  font-family: inherit;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 8px 24px rgba(225, 6, 0, 0.35);
}

.generate-btn:hover { box-shadow: 0 10px 30px rgba(225, 6, 0, 0.55); }
.generate-btn:active { transform: scale(0.98); }

/* ---- Tweet card ---- */
.tweet-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
}

.tweet-card.pop { animation: pop 0.35s ease; }

@keyframes pop {
  0% { transform: scale(0.98); opacity: 0.6; }
  60% { transform: scale(1.008); }
  100% { transform: scale(1); opacity: 1; }
}

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

.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--bg-2);
}

.tweet-user { flex: 1; min-width: 0; }

.name-row { display: flex; align-items: center; gap: 4px; }

.display-name {
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.verified { color: var(--blue); font-size: 0.9rem; }

.handle { color: var(--text-dim); font-size: 0.9rem; }

.x-logo { font-size: 1.4rem; color: var(--text); font-weight: 700; }

.tweet-text {
  margin: 16px 0;
  font-size: 1.35rem;
  line-height: 1.4;
  font-weight: 500;
  word-wrap: break-word;
}

.tweet-meta {
  color: var(--text-dim);
  font-size: 0.9rem;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--card-border);
}

.tweet-meta .views { font-weight: 600; color: var(--text); }

.tweet-stats {
  display: flex;
  justify-content: space-between;
  padding-top: 14px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.tweet-stats .stat { display: inline-flex; align-items: center; gap: 5px; }

/* ---- Actions ---- */
.actions { display: flex; gap: 10px; margin-bottom: 20px; }

.action-btn {
  flex: 1;
  padding: 14px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: var(--bg-2);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
}

.action-btn:hover { background: #1e1e28; border-color: #3a3a48; }
.action-btn:active { transform: scale(0.98); }

.action-btn.primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.action-btn.primary:hover { background: #1a8cd8; }

.disclaimer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.82rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ---- Footer ---- */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px 20px;
  color: var(--text-dim);
  font-size: 0.8rem;
  border-top: 1px solid var(--card-border);
}

@media (max-width: 480px) {
  .container { padding-top: 28px; }
  .mode-btn { font-size: 0.8rem; padding: 10px 4px; }
  .tweet-text { font-size: 1.15rem; }
  .tweet-stats { font-size: 0.82rem; }
}