:root {
  --bg: #0b0f17;
  --panel: #131b26;
  --panel-light: #1b2636;
  --border: #233347;
  --border-focus: #00d4ff;
  --accent: #00d4ff;
  --green: #00e676;
  --purple: #b388ff;
  --orange: #ff9100;
  --red: #ff3d57;
  --text: #e8f0fe;
  --text-muted: #7c92ac;
  --radius: 10px;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  padding-bottom: 90px;
}

/* HEADER */
.app-header {
  background: rgba(19, 27, 38, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-container {
  max-width: 1300px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
}
.logo b {
  color: var(--accent);
}
.logo-pulse {
  width: 10px;
  height: 10px;
  background-color: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--green);
}
.badge {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 6px;
  font-weight: 600;
  text-transform: uppercase;
}
.badge-accent {
  background: rgba(0, 212, 255, 0.15);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.3);
}
.badge-green {
  background: rgba(0, 230, 118, 0.15);
  color: var(--green);
  border: 1px solid rgba(0, 230, 118, 0.3);
}
.badge-muted {
  background: rgba(124, 146, 172, 0.15);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.doc-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
}

/* MAIN */
.main-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 30px 20px;
}

.hero-section {
  text-align: center;
  margin-bottom: 30px;
}
.hero-section h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 10px;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-section p {
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto;
  font-size: 0.95rem;
}

/* STEP NAV */
.step-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 35px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 24px;
}
.step-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
}
.step-item.active {
  color: var(--accent);
}
.step-item.active .step-num {
  background: var(--accent);
  color: #000;
}
.step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-family: var(--font-mono);
}
.step-line {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 15px;
}

/* UPLOAD SECTION */
.upload-box {
  background: var(--panel);
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 50px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}
.upload-box:hover, .upload-box.dragover {
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.03);
}
.upload-box input[type="file"] {
  display: none;
}
.upload-icon {
  font-size: 48px;
  margin-bottom: 15px;
}
.upload-box h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.upload-box p {
  color: var(--text-muted);
  font-size: 0.88rem;
  max-width: 580px;
  margin: 0 auto 20px;
}
.file-chosen-info {
  margin-top: 15px;
  font-size: 0.9rem;
  color: var(--green);
  font-weight: 600;
}

.upload-settings {
  margin: 20px 0;
  display: flex;
  justify-content: center;
}
.setting-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: var(--radius);
}
.setting-item label {
  font-size: 0.88rem;
  color: var(--text-muted);
}
.form-select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.88rem;
  outline: none;
}
.form-select:focus {
  border-color: var(--accent);
}

.action-center {
  text-align: center;
  margin-top: 25px;
}

/* BUTTONS */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  font-size: 0.9rem;
  text-decoration: none;
}
.btn-large {
  padding: 14px 32px;
  font-size: 1.05rem;
}
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover:not(:disabled) {
  filter: brightness(1.15);
  box-shadow: 0 4px 18px rgba(0, 212, 255, 0.35);
}
.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-secondary {
  background: var(--panel-light);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:hover {
  border-color: var(--accent);
}
.btn-danger-outline {
  background: transparent;
  border: 1px solid rgba(255, 61, 87, 0.3);
  color: var(--red);
}
.btn-danger-outline:hover {
  background: rgba(255, 61, 87, 0.1);
}

/* STATS */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin-bottom: 25px;
}
.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-blue { border-left: 4px solid var(--accent); }
.stat-green { border-left: 4px solid var(--green); }
.stat-purple { border-left: 4px solid var(--purple); }
.stat-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 5px;
}
.stat-val {
  font-size: 1.5rem;
  font-family: var(--font-mono);
  font-weight: 700;
}
.stat-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* TOOLBAR */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  gap: 15px;
  flex-wrap: wrap;
}
.toolbar-left, .toolbar-right {
  display: flex;
  gap: 10px;
}

/* SECTION BLOCKS */
.section-block {
  margin-bottom: 40px;
}
.section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}
.section-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
}
.section-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

/* PRICING CARDS */
.cards-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.mat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.mat-card-header {
  display: grid;
  grid-template-columns: 40px 1fr auto auto auto;
  gap: 15px;
  align-items: center;
  padding: 12px 18px;
  background: rgba(0, 212, 255, 0.04);
  border-bottom: 1px solid var(--border);
}
.mat-idx {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
}
.mat-name-box {
  min-width: 0;
}
.mat-title {
  font-weight: 600;
  font-size: 0.95rem;
}
.mat-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.mat-price-tag, .mat-total-tag, .mat-pct-tag {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-align: right;
  white-space: nowrap;
}
.mat-total-tag {
  font-weight: 700;
  color: var(--green);
}

.mat-card-body {
  padding: 18px;
}
.kbp-box {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
  font-size: 0.85rem;
  flex-wrap: wrap;
}
.kbp-badge-btn {
  background: rgba(179, 136, 255, 0.1);
  color: var(--purple);
  border: 1px solid rgba(179, 136, 255, 0.3);
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
}
.kbp-input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  width: 180px;
}

/* OFFERS 3 COLUMNS */
.offers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}
.offer-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}
.offer-box.filled {
  border-color: rgba(0, 230, 118, 0.4);
}
.offer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}
.form-group {
  margin-bottom: 8px;
}
.form-group label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2px;
}
.form-input, .form-select-sm {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.form-input:focus, .form-select-sm:focus {
  outline: none;
  border-color: var(--accent);
}
.input-with-btn {
  display: flex;
  gap: 5px;
}
.btn-icon {
  background: var(--panel-light);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0 8px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.85rem;
}
.btn-icon:hover {
  border-color: var(--purple);
  color: var(--purple);
}

/* AVG ROW (Сцд) */
.avg-bar {
  margin-top: 15px;
  background: rgba(0, 230, 118, 0.05);
  border: 1px solid rgba(0, 230, 118, 0.2);
  border-radius: 8px;
  padding: 10px 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.avg-bar.is-over {
  background: rgba(255, 61, 87, 0.08);
  border-color: rgba(255, 61, 87, 0.4);
}
.avg-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.avg-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}
.avg-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--green);
}
.avg-bar.is-over .avg-val {
  color: var(--red);
}
.avg-over-alert {
  font-size: 0.8rem;
  color: var(--red);
  background: rgba(255, 61, 87, 0.15);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

/* 40% TABLE */
.table-responsive {
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.data-table th {
  text-align: left;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
}
.data-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(35, 51, 71, 0.4);
  vertical-align: middle;
}
.data-table tr:hover td {
  background: rgba(0, 212, 255, 0.02);
}
.table-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 2px 4px;
  width: 100%;
}
.table-input:focus {
  outline: none;
  border-color: var(--accent);
}

/* STICKY BOTTOM BAR */
.sticky-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(19, 27, 38, 0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  padding: 14px 20px;
  z-index: 90;
}
.footer-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-info {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
}
.footer-buttons {
  display: flex;
  gap: 12px;
}
.btn-export-json {
  background: rgba(0, 230, 118, 0.15);
  color: var(--green);
  border: 1px solid rgba(0, 230, 118, 0.4);
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-export-json:hover {
  background: var(--green);
  color: #000;
}
.btn-export-xls {
  background: rgba(0, 212, 255, 0.15);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.4);
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-export-xls:hover {
  background: var(--accent);
  color: #000;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  font-size: 0.9rem;
  z-index: 1000;
  transition: opacity 0.2s ease;
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .offers-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
}