/* ============================================
   Styled QR Code Generator — Styles
   Theme: Dark Indigo/Violet with gradients
   ============================================ */

:root {
  --primary: #7C3AED;
  --primary-dim: rgba(124, 58, 237, 0.15);
  --secondary: #A78BFA;
  --accent: #F59E0B;
  --accent-dim: rgba(245, 158, 11, 0.15);
  --bg: #0F0B1E;
  --bg-card: rgba(15, 11, 30, 0.65);
  --bg-surface: #1A1430;
  --border: rgba(124, 58, 237, 0.12);
  --text: #EDE9FE;
  --text-dim: #7C6FA0;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 250ms ease;
  --font: 'Inter', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font); background: var(--bg); color: var(--text);
  line-height: 1.6; min-height: 100vh; -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(124,58,237,0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(245,158,11,0.03) 0%, transparent 50%);
}

.glass-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); padding: 1.25rem;
}

.header { padding: 1.25rem; text-align: center; border-bottom: 1px solid var(--border); }
.header-inner { max-width: 960px; margin: 0 auto; }
.logo { display: flex; align-items: center; justify-content: center; gap: 0.75rem; }
.logo-icon { font-size: 1.75rem; }
.logo h1 {
  font-size: 1.4rem; font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.tagline { color: var(--text-dim); font-size: 0.85rem; }

.main { max-width: 960px; margin: 0 auto; padding: 1.5rem; }
.layout { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: start; }
.section-title { font-size: 1rem; font-weight: 600; color: var(--primary); margin-bottom: 0.75rem; }

/* Controls */
.control-group { margin-bottom: 0.75rem; }
.control-label { display: block; font-size: 0.78rem; font-weight: 600; color: var(--text-dim); margin-bottom: 0.3rem; text-transform: uppercase; letter-spacing: 0.5px; }
.control-input {
  width: 100%; padding: 0.5rem 0.7rem; background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); font-family: var(--font); font-size: 0.85rem;
  transition: border-color var(--transition);
}
.control-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-dim); }
select.control-input { appearance: none; cursor: pointer; }
.control-row { display: flex; gap: 0.75rem; }
.control-half { flex: 1; }

/* Color Pick */
.color-pick { display: flex; align-items: center; gap: 0.5rem; }
.color-pick input[type="color"] { width: 36px; height: 36px; border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; padding: 2px; background: transparent; }
.color-pick span { font-family: 'SF Mono', monospace; font-size: 0.78rem; color: var(--text-dim); }

/* Type Tabs */
.type-tabs { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.type-tab {
  padding: 0.4rem 0.7rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: transparent; color: var(--text-dim); font-family: var(--font); font-size: 0.78rem;
  cursor: pointer; transition: all var(--transition);
}
.type-tab.active { background: var(--primary-dim); color: var(--primary); border-color: var(--primary); font-weight: 600; }

/* Dot Options */
.dot-options { display: flex; gap: 0.5rem; }
.dot-opt {
  width: 42px; height: 42px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); border-radius: var(--radius-sm); background: transparent;
  color: var(--text-dim); cursor: pointer; transition: all var(--transition);
}
.dot-opt.active { background: var(--primary-dim); color: var(--primary); border-color: var(--primary); }

/* Range */
.control-range { width: 100%; accent-color: var(--primary); }

/* Preview */
.preview { text-align: center; }
.preview-container {
  display: flex; align-items: center; justify-content: center;
  min-height: 280px; background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 1.5rem; position: relative;
}
.preview-container canvas { max-width: 100%; image-rendering: pixelated; border-radius: 4px; }
.placeholder-text { color: var(--text-dim); font-size: 0.9rem; }
.download-actions { display: flex; gap: 0.5rem; justify-content: center; margin-top: 0.75rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.55rem 1rem; border: none;
  border-radius: var(--radius-sm); font-family: var(--font); font-size: 0.85rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.btn-primary { background: linear-gradient(135deg, var(--primary), #6D28D9); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(124,58,237,0.35); }
.btn-accent { background: var(--accent); color: #0F0B1E; font-weight: 700; }
.btn-ghost { background: transparent; color: var(--text-dim); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-full { width: 100%; justify-content: center; }

.toast {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(100px);
  background: var(--primary); color: #fff; padding: 0.75rem 1.5rem; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600; z-index: 1000; transition: transform 300ms ease;
}
.toast.show { transform: translateX(-50%) translateY(0); }

.footer { text-align: center; padding: 1.25rem; color: var(--text-dim); font-size: 0.8rem; border-top: 1px solid var(--border); }

@media (max-width: 700px) { .layout { grid-template-columns: 1fr; } }