/* ── Reset & Base ────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1417;
  --surface: #1a2328;
  --surface-hover: #223038;
  --border: #2f3d45;
  --text: #e7eef0;
  --text-muted: #9eb0b8;
  --accent: #a9772a;
  --accent-hover: #b4873c;
  --accent-soft: rgba(169, 119, 42, 0.16);
  --accent-rgb: 169, 119, 42;
  --green: #19bf74;
  --green-bg: rgba(25, 191, 116, 0.12);
  --red: #f4c94f;
  --red-bg: rgba(244, 201, 79, 0.16);
  --yellow: #eab308;
  --yellow-bg: rgba(234, 179, 8, 0.1);
  --radius: 8px;
  --radius-lg: 12px;
}

:root[data-theme="light"] {
  --bg: #f4f7f8;
  --surface: #ffffff;
  --surface-hover: #f2f6f8;
  --border: #d3e0e6;
  --text: #16313e;
  --text-muted: #55717f;
  --accent: #d93c82;
  --accent-hover: #c13072;
  --accent-soft: rgba(217, 60, 130, 0.1);
  --accent-rgb: 217, 60, 130;
  --green: #0f9e61;
  --green-bg: rgba(15, 158, 97, 0.12);
  --red: #d63d5a;
  --red-bg: rgba(214, 61, 90, 0.12);
  --yellow: #c78f00;
  --yellow-bg: rgba(199, 143, 0, 0.12);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background:
    radial-gradient(circle at 15% 0%, var(--accent-soft), transparent 38%),
    radial-gradient(circle at 85% 0%, rgba(25, 191, 116, 0.08), transparent 34%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ── Header ──────────────────────────────────── */
header {
  position: relative;
  text-align: center;
  margin-bottom: 2.5rem;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.theme-toggle {
  position: absolute;
  right: 0;
  top: 0;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-muted);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Steps ───────────────────────────────────── */
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  margin-bottom: 1.5rem;
}

.step.hidden { display: none; }

.step-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.step-header h2 {
  font-size: 1.2rem;
  font-weight: 600;
}

/* ── Upload Zone ─────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.06);
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-icon { font-size: 2.5rem; display: block; margin-bottom: 0.5rem; }
.upload-label p { margin: 0.25rem 0; }
.hint { color: var(--text-muted); font-size: 0.85rem; }

/* ── Mapping ─────────────────────────────────── */
.mapping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.mapping-options {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.mapping-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.mapping-field select,
.mapping-field input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
}

.mapping-field select:focus,
.mapping-field input:focus {
  outline: none;
  border-color: var(--accent);
}

/* ── Preview Table ───────────────────────────── */
.preview-section { margin-bottom: 1.5rem; }
.preview-section h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.table-wrapper table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.table-wrapper th,
.table-wrapper td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.table-wrapper th {
  background: var(--bg);
  font-weight: 600;
  color: var(--text-muted);
  position: sticky;
  top: 0;
}

.table-wrapper tr:last-child td { border-bottom: none; }

/* ── Buttons ─────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.actions-bar {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ── Results Summary ─────────────────────────── */
.results-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.summary-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  text-align: center;
}

.summary-card .value {
  font-size: 1.5rem;
  font-weight: 700;
}

.summary-card .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.summary-card.open .value { color: var(--green); }
.summary-card.closed .value { color: var(--red); }
.summary-card.total .value { color: var(--accent); }

.sort-rule-note {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

/* ── Filter Bar ──────────────────────────────── */
.filter-bar {
  display: flex;
  gap: 0.5rem;
}

.results-controls {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.search-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: min(420px, 100%);
}

.search-wrap input {
  width: 100%;
  padding: 0.45rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
}

.search-wrap input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-count {
  color: var(--text-muted);
  font-size: 0.82rem;
  white-space: nowrap;
}

.filter-btn {
  padding: 0.4rem 1rem;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.filter-btn:hover:not(.active) {
  border-color: var(--text-muted);
  color: var(--text);
}

/* ── Lots ────────────────────────────────────── */
.lots-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.lot-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}

.lot-card:hover { border-color: var(--accent); }

.lot-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  cursor: pointer;
  user-select: none;
  gap: 1rem;
}

.lot-header:hover { background: var(--surface-hover); }

.lot-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  min-width: 0;
}

.lot-number {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent);
  flex-shrink: 0;
}

.lot-status {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.lot-status.open {
  background: var(--green-bg);
  color: var(--green);
}

.lot-status.closed {
  background: rgba(156, 163, 175, 0.1);
  color: var(--text-muted);
}

.lot-qty {
  font-size: 0.9rem;
  color: var(--text);
  flex-shrink: 0;
}

.lot-qty .remaining { color: var(--green); font-weight: 600; }
.lot-qty .original { color: var(--text-muted); }

.lot-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.lot-refs {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.ref-badge {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  white-space: nowrap;
}

.lot-expand {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.lot-card.expanded .lot-expand { transform: rotate(180deg); }

.lot-details {
  display: none;
  border-top: 1px solid var(--border);
  padding: 0;
}

.lot-card.expanded .lot-details { display: block; }

.lot-details table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.lot-details th,
.lot-details td {
  padding: 0.45rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.lot-details th {
  background: var(--surface);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.lot-details tr:last-child td { border-bottom: none; }

.lot-details .dir-buy { color: var(--green); font-weight: 600; }
.lot-details .dir-sell { color: var(--red); font-weight: 600; }

/* ── Responsive ──────────────────────────────── */
@media (max-width: 640px) {
  #app { padding: 1rem; }
  header { text-align: left; }
  .theme-toggle {
    position: static;
    margin-top: 0.75rem;
  }
  .step { padding: 1rem 1.25rem; }
  .upload-zone { padding: 2rem 1rem; }
  .results-controls { align-items: stretch; }
  .search-wrap { min-width: 100%; }
  .lot-info { flex-wrap: wrap; gap: 0.5rem; }
  .lot-refs { flex-wrap: wrap; }
}