:root {
  color-scheme: dark;
  color: #e8ebf0;
  background: #070a0f;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
  background: radial-gradient(circle at top, rgba(96, 165, 250, 0.12), transparent 28%),
    radial-gradient(circle at 20% 20%, rgba(236, 72, 153, 0.12), transparent 28%),
    #070a0f;
}

.page {
  width: min(100%, 820px);
  padding: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 30px;
  background: rgba(10, 14, 22, 0.92);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: #7c93b3;
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 4vw, 4rem);
  line-height: 1.02;
}

p {
  margin: 1rem 0 0;
  line-height: 1.8;
  color: #c9d1db;
}

.cards {
  display: grid;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

article {
  padding: 1.5rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

h2 {
  margin: 0 0 0.85rem;
  font-size: 1.1rem;
}

ul {
  padding-left: 1.25rem;
  margin: 0;
}

li {
  margin-bottom: 0.75rem;
}

a {
  color: #7dd3fc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 2rem;
  color: #8f9cb3;
  font-size: 0.95rem;
}

.calculator-card {
  margin-top: 2rem;
  padding: 1.75rem;
  border-radius: 28px;
  background: rgba(14, 18, 28, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.calculator-intro h2 {
  margin-top: 0;
  font-size: 1.5rem;
}

.calculator-form {
  margin-top: 1.25rem;
}

.form-group {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1.3fr 0.7fr;
}

.search-wrap {
  position: relative;
  display: grid;
  gap: 0.65rem;
  padding: 0.85rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.search-wrap label {
  margin: 0;
}

.search-wrap .item-search {
  width: 100%;
}

.search-suggestions {
  position: absolute;
  z-index: 30;
  left: 0;
  right: 0;
  top: calc(100% + 0.45rem);
  background: rgba(10, 14, 22, 0.99);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  max-height: 260px;
  overflow: auto;
  padding: 0.25rem 0;
}

.search-suggestion {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  color: #dbeafe;
}

.search-suggestion:hover {
  background: rgba(125, 211, 252, 0.12);
}

.search-suggestion img {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.search-suggestion span {
  display: block;
  line-height: 1.3;
}

.search-suggestion small {
  display: block;
  color: #94a3b8;
  font-size: 0.85rem;
}

.item-preview {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 2rem;
  color: #cbd5e1;
  font-size: 0.9rem;
}

.item-preview img {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
}

.search-suggestions {
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 35px rgba(0, 0, 0, 0.14);
}

label {
  display: grid;
  gap: 0.45rem;
  font-size: 0.95rem;
  color: #b8c3d3;
}

input[type="number"] {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #f8fafc;
}

input[type="search"] {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #f8fafc;
}

input[type="number"]:focus,
input[type="search"]:focus {
  outline: none;
  border-color: #7dd3fc;
  box-shadow: 0 0 0 3px rgba(125, 211, 252, 0.12);
}

#materials {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.85rem;
}

.material-row {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1.55fr 0.75fr auto;
  align-items: end;
}

.material-row label {
  margin: 0;
}

.material-row .search-wrap {
  padding: 0.85rem;
}

.remove-row {
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.remove-row:hover {
  transform: scale(1.05);
  background: rgba(248, 113, 113, 0.18);
}

.remove-row {
  border: none;
  background: rgba(255, 255, 255, 0.07);
  color: #f8fafc;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  font-size: 1.25rem;
  cursor: pointer;
}

.calculator-actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
}

button {
  cursor: pointer;
  border: none;
  padding: 0.95rem 1.25rem;
  border-radius: 14px;
  font-weight: 600;
  background: linear-gradient(135deg, #7dd3fc 0%, #38bdf8 100%);
  color: #071422;
}

#calculate-profit {
  background: #e879f9;
  color: #0f172a;
}

button:hover {
  opacity: 0.98;
  transform: translateY(-1px);
}

button {
  transition: transform 0.18s ease, opacity 0.18s ease, background-color 0.18s ease;
}

.calculator-message {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 16px;
  font-size: 0.95rem;
}

.calculator-message.info {
  background: rgba(59, 130, 246, 0.12);
  color: #bfdbfe;
}

.calculator-message.success {
  background: rgba(34, 197, 94, 0.14);
  color: #bbf7d0;
}

.calculator-message.error {
  background: rgba(248, 113, 113, 0.14);
  color: #fecaca;
}

.calculator-result {
  margin-top: 1.75rem;
}

.result-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1.4fr 1.6fr;
  padding: 1.4rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.result-label {
  font-size: 0.95rem;
  color: #8f9cb3;
}

.positive {
  color: #86efac;
  font-weight: 700;
}

.negative {
  color: #fda4af;
  font-weight: 700;
}

.material-summary {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.material-summary h3 {
  margin: 0 0 1rem;
}

.detail-row {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.2fr 0.9fr 1fr 1fr;
  padding: 0.85rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.detail-row.header {
  border-color: rgba(255, 255, 255, 0.12);
  font-size: 0.9rem;
  color: #94a3b8;
}

.fallback-note {
  color: #facc15;
  font-size: 0.82rem;
  margin-left: 0.2rem;
}

.detail-row:last-child {
  border-bottom: none;
}

@media (max-width: 700px) {
  .form-group,
  .material-row,
  .result-grid,
  .detail-row {
    grid-template-columns: 1fr !important;
  }
  .detail-row {
    gap: 0.5rem;
  }
}