/* SnapMock — Global Styles (Dark Theme) */

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

:root {
  --bg: #0f0f14;
  --surface: #1a1a24;
  --border: #2a2a3a;
  --text: #e4e4ef;
  --text-muted: #8888a4;
  --accent: #7c5cfc;
  --accent-hover: #6a48e8;
  --radius: 10px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  text-align: center;
  padding: 24px 16px 12px;
}
.logo { font-size: 1.6rem; font-weight: 700; }
.tagline { color: var(--text-muted); font-size: 0.9rem; margin-top: 4px; }

/* App Layout */
.app-layout {
  display: flex;
  flex: 1;
  gap: 0;
  padding: 12px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  height: fit-content;
  position: sticky;
  top: 12px;
}

.control-group label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.control-group select,
.control-group input[type="range"] {
  width: 100%;
}

select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.88rem;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238888a4'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

input[type="color"] {
  width: 100%;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: none;
  cursor: pointer;
  padding: 2px;
}

.btn-download {
  margin-top: auto;
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn-download:hover:not(:disabled) { background: var(--accent-hover); }
.btn-download:active:not(:disabled) { transform: scale(0.97); }
.btn-download:disabled { opacity: 0.4; cursor: not-allowed; }

/* Preview Area */
.preview-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  min-height: 500px;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 60px 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  width: 100%;
  max-width: 700px;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(124, 92, 252, 0.05);
}
.drop-icon { font-size: 3rem; display: block; margin-bottom: 12px; }
.drop-hint { color: var(--text-muted); font-size: 0.8rem; margin-top: 8px; }
.file-label {
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
}

#previewCanvas {
  max-width: 100%;
  max-height: 70vh;
  border-radius: 6px;
}

.btn-reset {
  position: absolute;
  top: 24px;
  right: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: color 0.15s, border-color 0.15s;
}
.btn-reset:hover { color: var(--text); border-color: var(--text-muted); }

.hidden { display: none !important; }

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}

/* Responsive: Tablet */
@media (max-width: 900px) {
  .app-layout { flex-direction: column; gap: 12px; }
  .sidebar {
    width: 100%;
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
    padding: 16px;
  }
  .sidebar .control-group { flex: 1 1 45%; min-width: 140px; }
  .btn-download { flex: 1 1 100%; }
  .preview-area { min-height: 300px; padding: 12px; }
}

/* Responsive: Phone */
@media (max-width: 480px) {
  header { padding: 16px 12px 8px; }
  .logo { font-size: 1.3rem; }
  .sidebar { padding: 12px; gap: 10px; }
  .sidebar .control-group { flex: 1 1 100%; }
  .drop-zone { padding: 36px 20px; }
  .drop-icon { font-size: 2rem; }
  #previewCanvas { max-height: 50vh; }
  .btn-reset { top: 16px; right: 16px; }
}