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

:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --surface2: #1a1a1a;
  --border: #222222;
  --green: #39ff14;
  --green-dim: #1a7a08;
  --text: #e8e8e8;
  --text-muted: #666;
  --radius: 8px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 16px 80px;
}

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

header h1 {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--green);
  text-shadow: 0 0 20px rgba(57,255,20,0.3);
}

header p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 6px;
  letter-spacing: 0.05em;
}

.container {
  width: 100%;
  max-width: 700px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Drop zone */
#dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--surface);
}

#dropzone:hover, #dropzone.drag-over {
  border-color: var(--green);
  background: rgba(57,255,20,0.04);
}

#dropzone .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.6;
}

#dropzone p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

#dropzone p span {
  color: var(--green);
}

#file-input { display: none; }

/* Panel */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: none;
}

.panel.visible { display: block; }

/* Video preview */
#video-wrap {
  position: relative;
  background: #000;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 16px;
}

#preview-video {
  width: 100%;
  display: block;
  max-height: 320px;
  object-fit: contain;
}

/* Time range */
.time-range-section {
  margin-bottom: 20px;
}

.time-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.time-labels span { color: var(--green); font-weight: 600; }

.slider-wrap {
  position: relative;
  height: 36px;
  display: flex;
  align-items: center;
}

.slider-track {
  position: absolute;
  left: 0; right: 0;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  pointer-events: none;
}

.slider-fill {
  position: absolute;
  height: 4px;
  background: var(--green);
  border-radius: 2px;
  pointer-events: none;
}

.slider-wrap input[type=range] {
  position: absolute;
  width: 100%;
  height: 4px;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
  pointer-events: none;
  outline: none;
}

.slider-wrap input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--green);
  border: 2px solid var(--bg);
  cursor: pointer;
  pointer-events: all;
  box-shadow: 0 0 8px rgba(57,255,20,0.5);
  transition: box-shadow 0.15s;
}

.slider-wrap input[type=range]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 14px rgba(57,255,20,0.8);
}

.slider-wrap input[type=range]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--green);
  border: 2px solid var(--bg);
  cursor: pointer;
  pointer-events: all;
  box-shadow: 0 0 8px rgba(57,255,20,0.5);
}

/* Controls */
.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.control-group label {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.btn-group {
  display: flex;
  gap: 4px;
}

.btn-group button {
  flex: 1;
  padding: 6px 4px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-group button.active,
.btn-group button:hover {
  border-color: var(--green);
  color: var(--green);
  background: rgba(57,255,20,0.06);
}

.quality-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.quality-wrap input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

.quality-wrap input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--green);
  border: 2px solid var(--bg);
  cursor: pointer;
}

.quality-wrap span {
  font-size: 0.8rem;
  color: var(--green);
  min-width: 16px;
  text-align: right;
}

/* Duration info */
.info-row {
  display: flex;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.info-row b { color: var(--text); }

/* Convert button */
#convert-btn {
  width: 100%;
  padding: 14px;
  background: var(--green);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: opacity 0.15s, box-shadow 0.15s;
  text-transform: uppercase;
}

#convert-btn:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(57,255,20,0.4);
}

#convert-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Progress */
#progress-wrap {
  display: none;
  margin-top: 12px;
}

#progress-wrap.visible { display: block; }

.progress-bar-bg {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 6px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--green);
  border-radius: 2px;
  width: 0%;
  transition: width 0.1s;
  box-shadow: 0 0 8px rgba(57,255,20,0.6);
}

#progress-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
}

/* Output */
#output-panel {
  text-align: center;
}

#output-panel h3 {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

#gif-preview {
  max-width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

#gif-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

#download-btn {
  display: inline-block;
  padding: 10px 28px;
  background: transparent;
  border: 1px solid var(--green);
  border-radius: var(--radius);
  color: var(--green);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.15s;
  letter-spacing: 0.05em;
}

#download-btn:hover {
  background: rgba(57,255,20,0.08);
  box-shadow: 0 0 12px rgba(57,255,20,0.3);
}

/* Reset */
#reset-btn {
  display: block;
  margin: 12px auto 0;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  text-decoration: underline;
}

#reset-btn:hover { color: var(--text); }

@media (max-width: 500px) {
  .controls-grid { grid-template-columns: 1fr 1fr; }
  header h1 { font-size: 1.8rem; }
}