/* ===== Design tokens — Dark modern (Vercel/Linear-inspired) ===== */
:root {
  --bg: #000000;
  --bg-elevated: #111111;
  --bg-inset: #0a0a0a;
  --border: #262626;       /* neutral-800 */
  --border-hover: #404040; /* neutral-700 */
  --text: #fafafa;
  --text-muted: #a3a3a3;   /* neutral-400 */
  --text-subtle: #737373;  /* neutral-500 */
  --accent-green: #22c55e;
  --accent-green-hover: #4ade80;
  --accent-pink: #ec4899;
  --accent-pink-hover: #f472b6;
  --danger: #f87171;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 7px;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 2rem 1rem;
  line-height: 1.5;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 2rem;
  border-radius: var(--radius-lg);
}

.home-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 1.4rem;
  transition: color 0.15s ease;
}

.home-link:hover {
  color: var(--text);
}

.home-link .avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-pink));
  color: #000;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.tool-grid {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.tool-card {
  display: block;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.4rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.tool-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-1px);
}

.tool-card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.tool-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

h1 {
  margin-top: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(90deg, var(--text) 40%, var(--accent-green) 75%, var(--accent-pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.hint {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.hint a {
  color: var(--accent-green);
}

.hint a:hover {
  color: var(--accent-green-hover);
}

input[type="file"],
input[type="password"],
input[type="text"],
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  margin: 0.4rem 0 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-inset);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent-green);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
}

.preview-audio {
  width: 100%;
  margin: 1rem 0;
  accent-color: var(--accent-green);
}

input[type="range"] {
  width: 100%;
  margin: 0.4rem 0 1rem;
  accent-color: var(--accent-green);
}

#speed-value {
  color: var(--text-muted);
  text-transform: none;
  font-weight: 500;
  letter-spacing: normal;
}

.field-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-subtle);
  margin-top: 0.8rem;
}

.field-sep {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.4rem 0;
}

button,
.btn {
  display: inline-block;
  background: var(--accent-green);
  color: #05170c;
  border: none;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.1s ease;
}

button:hover,
.btn:hover {
  background: var(--accent-green-hover);
}

button:active,
.btn:active {
  transform: scale(0.98);
}

button:disabled {
  background: #333;
  color: var(--text-subtle);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--accent-pink);
  color: #fff;
}

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

.error {
  color: var(--danger);
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  font-size: 0.9rem;
}

#canvas-wrap {
  position: relative;
  display: inline-block;
  max-width: 100%;
  margin: 1rem 0;
}

#preview-img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

#draw-canvas {
  position: absolute;
  top: 0;
  left: 0;
  cursor: crosshair;
  touch-action: none;
}

#box-info {
  margin-top: 0.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

#progress-wrap {
  margin: 1.5rem 0;
}

#progress-bar {
  background: var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  height: 10px;
}

#progress-fill {
  background: linear-gradient(90deg, var(--accent-green), var(--accent-pink));
  height: 100%;
  width: 0%;
  transition: width 0.3s ease;
}

#progress-text {
  margin-top: 0.4rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.preview-video {
  max-width: 100%;
  max-height: 250px;
  width: auto;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: block;
  margin: 1rem auto;
}

.result-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1.2rem;
  margin: 1rem 0;
}

.result-row .preview-video {
  margin: 0;
  flex-shrink: 0;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.result-actions.result-actions-row {
  flex-direction: row;
  flex-wrap: wrap;
}

.result-actions .btn {
  text-align: center;
}