/* ═══════════════════════════════════════════════
   Voltmasters Config Generator — Design System
   ═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #1f2333;
  --bg-input: #141620;
  --border: #2a2e3d;
  --border-focus: #3b82f6;
  --text: #e8eaf0;
  --text2: #9ca3af;
  --muted: #6b7280;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent2: #8b5cf6;
  --green: #10b981;
  --amber: #f59e0b;
  --red: #ef4444;
  --orange: #f97316;
  --radius: 12px;
  --glass: rgba(255,255,255,0.03);
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Header ── */
.app-header {
  background: linear-gradient(180deg, rgba(59,130,246,.08) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  padding: 2rem 2rem 1.5rem;
  text-align: center;
}
.app-header h1 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.app-header .subtitle {
  font-size: .85rem;
  color: var(--text2);
  margin-top: .3rem;
}
.app-header .branding {
  font-size: .7rem;
  color: var(--muted);
  margin-top: .5rem;
}

/* ── Layout ── */
.app-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 2rem 3rem;
}

/* ── Zone / Section ── */
.zone {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.2rem;
  backdrop-filter: blur(8px);
}
.zone-hdr {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 1rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--border);
}
.zone-hdr .icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  background: var(--accent-glow);
  flex-shrink: 0;
}
.zone-hdr h2 {
  font-size: .95rem;
  font-weight: 700;
}
.zone-hdr .badge-count {
  margin-left: auto;
  font-size: .7rem;
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--accent-glow);
  color: var(--accent);
  font-weight: 600;
}

/* ── Drop Zone ── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all .2s ease;
  background: var(--glass);
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.drop-zone .drop-icon {
  font-size: 2.5rem;
  margin-bottom: .8rem;
  opacity: .7;
}
.drop-zone .drop-text {
  font-size: .85rem;
  color: var(--text2);
}
.drop-zone .drop-text strong {
  color: var(--accent);
  font-weight: 600;
}
.drop-zone .drop-hint {
  font-size: .7rem;
  color: var(--muted);
  margin-top: .5rem;
}

/* ── Status ── */
.status {
  padding: .5rem .8rem;
  border-radius: 8px;
  font-size: .78rem;
  margin-top: .8rem;
  display: none;
}
.status-ok { background: rgba(16,185,129,.1); border: 1px solid rgba(16,185,129,.3); color: var(--green); }
.status-warn { background: rgba(245,158,11,.1); border: 1px solid rgba(245,158,11,.3); color: var(--amber); }
.status-err { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.3); color: var(--red); }

/* ── Auto Data Cards ── */
.auto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .6rem;
}
.auto-card {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .6rem .8rem;
  transition: border-color .2s;
}
.auto-card:hover { border-color: var(--accent); }
.auto-label {
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  margin-bottom: .15rem;
}
.auto-value {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
}
.auto-value.highlight {
  color: var(--accent);
}

/* ── Analysis Dashboard ── */
.analysis-header {
  display: flex;
  gap: .8rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.analysis-stat {
  flex: 1;
  min-width: 100px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .6rem;
  text-align: center;
}
.stat-val {
  display: block;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
}
.stat-label {
  display: block;
  font-size: .65rem;
  color: var(--muted);
  margin-top: .1rem;
}

.month-timeline {
  display: flex;
  gap: .3rem;
  overflow-x: auto;
  padding: .4rem 0;
}
.month-badge {
  min-width: 52px;
  padding: .3rem .4rem;
  border-radius: 6px;
  text-align: center;
  font-size: .68rem;
  font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--op-color, #3b82f6) 40%, transparent);
  background: color-mix(in srgb, var(--op-color, #3b82f6) 10%, transparent);
  color: var(--op-color, #3b82f6);
}
.month-badge small {
  display: block;
  font-size: .55rem;
  font-weight: 400;
  opacity: .8;
}

.calendar-preview {
  background: var(--accent-glow);
  border: 1px solid rgba(59,130,246,.3);
  border-radius: 8px;
  padding: .6rem .8rem;
  margin-top: .8rem;
}
.calendar-preview h4 {
  font-size: .78rem;
  color: var(--accent);
  font-weight: 600;
}

/* ── Form ── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.form-group label {
  font-size: .72rem;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: .03em;
}
.form-group input,
.form-group select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .5rem .7rem;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: .82rem;
  transition: border-color .2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input::placeholder {
  color: var(--muted);
}
.form-section-title {
  font-size: .78rem;
  font-weight: 700;
  color: var(--accent2);
  padding: .6rem 0 .3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: .5rem;
  grid-column: 1 / -1;
}

/* ── Buttons ── */
.btn-row {
  display: flex;
  gap: .8rem;
  margin-top: 1.2rem;
}
.btn {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: .82rem;
  padding: .65rem 1.5rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all .2s;
}
.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  box-shadow: 0 2px 12px rgba(59,130,246,.3);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(59,130,246,.4);
}
.btn-primary:disabled {
  opacity: .4;
  cursor: not-allowed;
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}
.btn-secondary:disabled {
  opacity: .4;
  cursor: not-allowed;
}

/* ── Preview ── */
.preview-frame {
  width: 100%;
  height: 600px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .app-container { padding: 1rem; }
  .auto-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .analysis-header { flex-direction: column; }
  .month-timeline { gap: .2rem; }
}