:root {
  --bg: #0a0e17;
  --bg-light: #131a26;
  --panel: #1a2237;
  --line: #2d3f57;
  --text: #e8f0f9;
  --text-muted: #9db4ca;
  --accent: #ff6b35;
  --accent-light: #ff8656;
  --road: #4a9eff;
  --gravel: #f5c842;
  --success: #52c97a;
  --danger: #ff5566;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* HEADER */
.topbar {
  background: linear-gradient(135deg, #0f1823 0%, #1a2a3a 100%);
  padding: 1.5rem 1rem;
  border-bottom: 2px solid var(--line);
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.topbar h1 {
  margin: 0;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #ff6b35 0%, #ff8656 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 2px 10px rgba(255, 107, 53, 0.2);
}

@media (min-width: 768px) {
  .topbar {
    padding: 2.5rem 2rem;
  }
  .topbar h1 {
    font-size: 3.5rem;
  }
}

.tagline {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 400;
}

@media (min-width: 768px) {
  .tagline {
    margin-top: 0.75rem;
    font-size: 1.05rem;
  }
}

main {
  padding: 1rem;
  max-width: 1600px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  main {
    padding: 2rem;
  }
}

.footer {
  padding: 2rem;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

/* LAYOUT */
.layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 1000px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 1.25rem;
  color: var(--text);
}

/* DISCIPLINE TABS */
.discipline-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tab-btn {
  background: var(--bg-light);
  border: 2px solid var(--line);
  color: var(--text-muted);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  text-align: center;
}

.tab-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.tab-btn.active {
  background: rgba(255, 107, 53, 0.15);
  border-color: var(--accent);
  color: var(--accent-light);
  font-weight: 700;
}

.badge-count {
  font-size: 0.7rem;
  opacity: 0.8;
}

/* FILTERS */
.filters {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.filters label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  gap: 0.4rem;
}

select, .frame-card button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 0.95rem;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

select {
  width: 100%;
  cursor: pointer;
}

select:hover {
  border-color: var(--accent);
}

select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.1);
}

/* FRAME LIST */
.frame-cards {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.frame-card button {
  width: 100%;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--panel) 0%, #1f2b3b 100%);
  padding: 0.875rem;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.frame-card button:active {
  border-color: var(--accent);
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.15);
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(255, 134, 86, 0.05) 100%);
}

@media (hover: hover) {
  .frame-card button:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.15);
    transform: translateY(-2px);
  }
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.card-header > div {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.frame-card .price {
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
  font-size: 0.95rem;
}

.frame-card .name {
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1.2;
}

.frame-card .meta {
  color: var(--text-muted);
  font-size: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  font-weight: 700;
  width: fit-content;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge.road {
  background: var(--road);
  color: #0a0e17;
}

.badge.gravel {
  background: var(--gravel);
  color: #0a0e17;
}

/* LOAD MORE BUTTON */
.load-more-btn {
  width: 100%;
  padding: 0.75rem 1rem;
  margin-top: 1rem;
  background: rgba(255, 107, 53, 0.1);
  border: 2px solid var(--accent);
  color: var(--accent-light);
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.load-more-btn:hover {
  background: rgba(255, 107, 53, 0.2);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.2);
}

.load-more-btn:active {
  transform: translateY(1px);
}

/* PANELS */
.configurator-panel,
.frames-panel {
  background: linear-gradient(135deg, var(--panel) 0%, #1f2b3b 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.chosen-frame {
  background: var(--bg-light);
  padding: 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  margin-bottom: 1.5rem;
}

.chosen-frame .name {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.chosen-frame .specs {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: grid;
  gap: 0.35rem;
}

/* PICKERS */
.pickers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 560px) {
  .pickers {
    grid-template-columns: 1fr;
  }
}

.picker {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.picker-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.picker-option {
  background: var(--bg-light);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
}

.picker-option:hover {
  border-color: var(--accent);
  background: rgba(255, 107, 53, 0.05);
}

.picker-option.selected {
  border-color: var(--accent);
  background: rgba(255, 107, 53, 0.1);
  color: var(--accent-light);
  font-weight: 600;
}

/* SUMMARY */
.summary {
  margin-top: 2rem;
  border-top: 2px solid var(--line);
  padding-top: 1.5rem;
}

.summary table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.summary tbody tr {
  border-bottom: 1px solid var(--line);
}

.summary td {
  padding: 0.75rem 0;
  vertical-align: middle;
}

.summary .cat {
  color: var(--text-muted);
  font-size: 0.85rem;
  width: 120px;
}

.summary .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  font-weight: 500;
}

.summary tfoot {
  border-top: 2px solid var(--accent);
}

.summary tfoot td {
  font-weight: 700;
  padding-top: 1rem;
  font-size: 1.1rem;
  color: var(--accent-light);
}

.summary .total {
  color: var(--accent-light);
}

.complete {
  color: var(--success);
  font-weight: 600;
  font-size: 0.9rem;
}

.warn {
  color: var(--danger);
  font-size: 0.8rem;
  font-weight: 500;
}

.hint,
.empty {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 1rem;
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.2);
}

/* ANIMATIONS */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.frame-cards li,
.picker-option,
.summary {
  animation: fadeIn 0.3s ease-out;
}