/* London Dynamics Design System - GLB Validator */

:root {
  --white:      #ffffff;
  --off:        #f4f3f1;
  --light:      #efefef;
  --border:     #e2e0dd;
  --mid:        #cacaca;
  --text:       #2f2f2f;
  --muted:      #888888;
  --blue:       #3B86F9;
  --blue-light: rgba(59,134,249,0.07);
  --blue-mid:   rgba(59,134,249,0.15);
  --error:      #d32f2f;
  --warning:    #f57c00;
  --success:    #388e3c;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--white);
  color: var(--text);
  font-family: 'Inter', -apple-system, 'Suisse BP Intl', sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

/* NAV */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.93);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-right {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  gap: 2rem;
}

/* HEADER */
header {
  padding: 5rem 2.5rem 4rem;
  max-width: 1100px;
  margin: 0 auto;
}

header h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

header h1 span {
  color: var(--blue);
}

header p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.78;
}

.header-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
  display: block;
}

/* SECTION LABEL */
.sec-lbl {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sec-lbl::before {
  content: '→';
  color: var(--blue);
}

/* UPLOAD SECTION */
.upload-zone {
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 4rem 2.5rem;
  text-align: center;
  background: var(--white);
  cursor: pointer;
  transition: all 0.18s;
  position: relative;
  margin-bottom: 3rem;
}

.upload-zone:hover {
  border-color: var(--blue);
  background: var(--blue-light);
}

.upload-zone.drag-over {
  border-color: var(--blue);
  background: var(--blue-light);
  transform: none;
}

.upload-icon {
  width: 48px;
  height: 48px;
  color: var(--blue);
  margin-bottom: 1.5rem;
  opacity: 0.8;
}

.upload-zone h2 {
  font-size: 1.4rem;
  font-weight: 300;
  margin-bottom: 0.5rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.upload-zone p {
  color: var(--muted);
  font-size: 0.9rem;
}

.link-btn {
  background: none;
  border: none;
  color: var(--blue);
  text-decoration: none;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0;
  font-weight: 500;
}

.link-btn:hover {
  text-decoration: underline;
}

#fileInput {
  display: none;
}

/* MAIN CONTENT */
.main-content {
  padding: 0 2.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin-bottom: 2rem;
}

h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.6rem;
}

/* FILE INFO GRID */
.file-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  padding: 2.5rem;
  border: 1px solid var(--border);
  background: var(--white);
  margin-bottom: 3rem;
}

.file-info-item {
  display: flex;
  flex-direction: column;
}

.file-info-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.6rem;
}

.file-info-value {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.2;
  word-break: break-all;
}

/* STATUS BANNER */
.status-banner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  padding: 2rem 2.5rem;
  border: 1px solid var(--border);
  background: var(--white);
  align-items: center;
  margin-bottom: 3rem;
}

.status-icon {
  font-size: 2.2rem;
  line-height: 1;
}

.status-icon.pass {
  color: var(--success);
}

.status-icon.warning {
  color: var(--warning);
}

.status-icon.error {
  color: var(--error);
}

.status-text h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.status-text p {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}

.issue-summary {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.issue-count {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 1rem;
  border-right: 1px solid var(--border);
}

.issue-count:last-child {
  border-right: none;
}

.issue-count-value {
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1;
  margin-bottom: 0.3rem;
}

.issue-count-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.issue-count.errors .issue-count-value {
  color: var(--error);
}

.issue-count.warnings .issue-count-value {
  color: var(--warning);
}

.issue-count.infos .issue-count-value {
  color: var(--blue);
}

/* VALIDATORS GRID */
.validators {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.validator-card {
  border: 1px solid var(--border);
  padding: 2rem;
  background: var(--white);
  transition: all 0.18s;
}

.validator-card:hover {
  border-color: var(--blue);
  box-shadow: 0 1px 3px rgba(59, 134, 249, 0.08);
}

.validator-card.pass {
  border-top: 3px solid var(--success);
}

.validator-card.warning {
  border-top: 3px solid var(--warning);
}

.validator-card.error {
  border-top: 3px solid var(--error);
}

.validator-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  font-size: 0.88rem;
  padding: 0.75rem;
  background: var(--off);
  border-radius: 0;
}

.check-icon {
  min-width: 20px;
  text-align: center;
  font-weight: 600;
  margin-top: 0.05rem;
}

.check-icon.pass {
  color: var(--success);
}

.check-icon.warning {
  color: var(--warning);
}

.check-icon.error {
  color: var(--error);
}

.check-text {
  flex: 1;
}

.check-label {
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.check-detail {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

/* ISSUES SECTION */
.issues-section {
  border: 1px solid var(--border);
  padding: 2.5rem;
  background: var(--white);
  margin-bottom: 3rem;
}

.issues-section h3 {
  margin-bottom: 1.5rem;
}

.issues-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 500px;
  overflow-y: auto;
}

.issue-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: var(--off);
  border-left: 3px solid;
  font-size: 0.9rem;
}

.issue-item.error {
  border-left-color: var(--error);
  background: rgba(211, 47, 47, 0.04);
}

.issue-item.warning {
  border-left-color: var(--warning);
  background: rgba(245, 124, 0, 0.04);
}

.issue-item.info {
  border-left-color: var(--blue);
  background: var(--blue-light);
}

.issue-icon {
  min-width: 20px;
  text-align: center;
  font-weight: 600;
  margin-top: 0.05rem;
  font-size: 1rem;
}

.issue-message {
  flex: 1;
  color: var(--text);
  line-height: 1.5;
}

.issue-meta {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.4rem;
  font-family: 'DM Mono', monospace;
}

.no-issues {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--success);
}

.no-issues-icon {
  font-size: 2.5rem;
  margin-bottom: 0.8rem;
}

.no-issues h4 {
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 0.3rem;
  font-weight: 500;
}

.no-issues p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ACTIONS */
.actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.btn {
  padding: 0.75rem 1.5rem;
  border: 1px solid;
  border-radius: 0;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s;
  font-family: 'Inter', sans-serif;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--blue);
  color: white;
  border-color: var(--blue);
}

.btn-primary:hover {
  background: #2563eb;
  border-color: #2563eb;
  box-shadow: 0 2px 8px rgba(59, 134, 249, 0.2);
}

.btn-secondary {
  background: var(--white);
  color: var(--blue);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--off);
  border-color: var(--blue);
}

.btn:active {
  transform: none;
}

/* HIDDEN BY DEFAULT */
.results-section {
  display: none;
}

.results-section.visible {
  display: block;
}

/* FOOTER */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 2.5rem;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.ld-mark {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  font-weight: 500;
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0;
  text-transform: none;
}

/* DETAIL ITEMS */
.mesh-item,
.anchor-item,
.texture-item {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.mesh-item:last-child,
.anchor-item:last-child,
.texture-item:last-child {
  border-bottom: none;
}

.mesh-name,
.anchor-name,
.texture-name {
  font-weight: 500;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
}

.mesh-stat {
  color: #666;
  font-size: 0.85rem;
  margin-left: 0.5rem;
}

.detail-section {
  margin-bottom: 1.5rem;
}

.detail-section h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--blue);
  letter-spacing: 0.05em;
  margin-bottom: 0.8rem;
}

.no-items {
  color: #999;
  font-size: 0.9rem;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .wrap {
    padding: 0 1.5rem;
  }

  nav {
    padding: 0.8rem 1.5rem;
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  nav .nav-right {
    flex-direction: column;
    gap: 0.5rem;
  }

  header {
    padding: 3rem 1.5rem;
  }

  .validators,
  .status-banner {
    grid-template-columns: 1fr;
  }

  .status-banner {
    gap: 1rem;
  }

  .file-info {
    grid-template-columns: 1fr 1fr;
  }

  footer {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}