:root {
  --primary: #ff6d00;
  --primary-container: #ff9100;
  --secondary: #00e5ff;
  --secondary-container: #0097a7;
  --surface: #0a0a0f;
  --surface-dim: #12121a;
  --surface-container: #1a1a24;
  --surface-container-high: #22222e;
  --surface-container-highest: #2a2a38;
  --on-surface: #e8e8f0;
  --on-surface-variant: #a0a0b0;
  --outline: #3a3a4a;
  --outline-variant: #2a2a3a;
  --error: #ff5252;
  --success: #69f0ae;
  --warning: #ffd740;
  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
}

html { overflow-x: hidden; }

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--surface);
  color: var(--on-surface);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated background */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,109,0,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0,229,255,0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(255,145,0,0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: bgPulse 8s ease-in-out infinite alternate;
}

@keyframes bgPulse {
  0% { opacity: 0.6; }
  100% { opacity: 1; }
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--outline-variant);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 20px rgba(255,109,0,0.3);
}

.logo-text h1 {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text p {
  font-size: 11px;
  color: var(--on-surface-variant);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.header-status {
  display: flex;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(105,240,174,0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(105,240,174,0); }
}

/* Layout */
.container {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  min-height: calc(100vh - 76px);
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}

.tool-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  color: var(--on-surface-variant);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: var(--surface-container);
  color: var(--on-surface);
}

.nav-item.active {
  background: var(--surface-container-high);
  color: var(--primary);
  border-color: var(--outline);
}

.nav-item .material-icons-round {
  font-size: 20px;
}

.nav-item.active .material-icons-round {
  color: var(--primary);
}

/* Main Content */
.main-content {
  min-height: 60vh;
  max-width: 100%;
  overflow-x: hidden;
}

.tool-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tool-panel.active {
  display: block;
}

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

/* Cards */
.card {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.card-header .icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.card-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.card-header p {
  font-size: 13px;
  color: var(--on-surface-variant);
}

/* Form Elements */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

input, select, textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--surface-dim);
  border: 1px solid var(--outline);
  border-radius: var(--radius-sm);
  color: var(--on-surface);
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  transition: all 0.2s;
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,109,0,0.15);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* Custom URL section - mobile flex wrapping */
@media (max-width: 900px) {
  #custom-url-section {
    margin-bottom: 16px !important;
  }
  #custom-url-section [style*="display:flex"],
  #custom-url-section [style*="display: flex"] {
    flex-wrap: wrap !important;
  }
  #custom-url-section input[type="text"] {
    min-width: 0 !important;
    width: 100% !important;
    flex-basis: 100% !important;
  }
  #custom-url-section select {
    width: 100% !important;
    flex-basis: 100% !important;
  }
  #custom-url-section button {
    width: 100% !important;
    flex-basis: 100% !important;
  }
}

.form-row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,109,0,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255,109,0,0.4);
}

.btn-secondary {
  background: var(--surface-container-high);
  color: var(--on-surface);
  border: 1px solid var(--outline);
}

.btn-secondary:hover {
  background: var(--surface-container-highest);
}

.btn .material-icons-round {
  font-size: 18px;
}

/* Results */
.result-box {
  background: var(--surface-dim);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-top: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 500px;
  overflow-y: auto;
}

.result-box::-webkit-scrollbar { width: 6px; }
.result-box::-webkit-scrollbar-track { background: transparent; }
.result-box::-webkit-scrollbar-thumb { background: var(--outline); border-radius: 3px; }

/* Tags */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.tag-success { background: rgba(105,240,174,0.15); color: var(--success); }
.tag-warning { background: rgba(255,215,64,0.15); color: var(--warning); }
.tag-error { background: rgba(255,82,82,0.15); color: var(--error); }
.tag-info { background: rgba(0,229,255,0.15); color: var(--secondary); }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.stat-card {
  background: var(--surface-dim);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.stat-card .value {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  font-family: 'JetBrains Mono', monospace;
}

.stat-card .label {
  font-size: 11px;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

/* Loading */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--outline);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
}

.loading-overlay.show { display: flex; }

.loading-overlay .spinner {
  width: 48px;
  height: 48px;
  border-width: 3px;
}

/* Responsive */
@media (max-width: 900px) {
  .container {
    grid-template-columns: 1fr;
    padding: 16px;
  }
  .sidebar {
    position: static;
  }
  .tool-nav {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
  }
  .nav-item {
    white-space: nowrap;
    flex-shrink: 0;
  }
  .form-row, .form-row-3 {
    grid-template-columns: 1fr;
  }
}

/* Toast */
.toast-container {
  position: fixed;
  top: 90px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--surface-container-high);
  border: 1px solid var(--outline);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.3s ease;
  max-width: 400px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Tutorial Box */
.tutorial-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface-dim);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-xs);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 16px;
  transition: all 0.2s;
  user-select: none;
}

.tutorial-toggle:hover {
  background: var(--surface-container);
  border-color: var(--secondary);
}

.tutorial-toggle .arrow {
  transition: transform 0.2s;
  font-size: 16px;
}

.tutorial-toggle.open .arrow {
  transform: rotate(90deg);
}

.tutorial-box {
  display: none;
  background: var(--surface-dim);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-xs);
  padding: 16px 20px;
  margin-bottom: 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--on-surface-variant);
}

.tutorial-box.open {
  display: block;
  animation: fadeIn 0.2s ease;
}

.tutorial-box h4 {
  color: var(--secondary);
  font-size: 13px;
  font-weight: 700;
  margin: 12px 0 6px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tutorial-box h4:first-child {
  margin-top: 0;
}

.tutorial-box ol {
  padding-left: 20px;
  margin: 4px 0;
}

.tutorial-box li {
  margin-bottom: 4px;
}

.tutorial-box code {
  background: var(--surface-container);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--primary);
}

.tutorial-box .tip {
  background: rgba(0,229,255,0.08);
  border-left: 3px solid var(--secondary);
  padding: 8px 12px;
  margin: 8px 0;
  border-radius: 0 6px 6px 0;
  font-size: 12px;
}

.tutorial-box .warn {
  background: rgba(255,215,64,0.08);
  border-left: 3px solid var(--warning);
  padding: 8px 12px;
  margin: 8px 0;
  border-radius: 0 6px 6px 0;
  font-size: 12px;
}

/* Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--on-surface-variant);
  border-bottom: 1px solid var(--outline);
}

.data-table td {
  padding: 10px 12px;
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
  border-bottom: 1px solid var(--outline-variant);
}

.data-table tr:hover td {
  background: var(--surface-container);
}
/* ═══ Language Toggle ═══ */
.lang-toggle{display:flex;align-items:center;gap:4px;background:var(--surface-container);border:1px solid var(--outline);border-radius:var(--radius-xs);padding:4px}
.lang-btn{padding:6px 14px;border:none;border-radius:6px;font-family:Inter,sans-serif;font-size:12px;font-weight:700;cursor:pointer;transition:all .2s;background:transparent;color:var(--on-surface-variant);letter-spacing:1px}
.lang-btn.active{background:linear-gradient(135deg,var(--primary),var(--primary-container));color:#fff;box-shadow:0 2px 8px rgba(255,109,0,.3)}
.lang-btn:hover:not(.active){color:var(--on-surface);background:var(--surface-container-high)}
/* ═══ Clear Cache ═══ */
.clear-cache-btn{display:flex;align-items:center;gap:6px;padding:6px 14px;background:var(--surface-container);border:1px solid var(--outline);border-radius:var(--radius-xs);cursor:pointer;font-family:Inter,sans-serif;font-size:12px;font-weight:600;color:var(--on-surface-variant);transition:all .2s}
.clear-cache-btn:hover{background:rgba(255,82,82,.15);border-color:var(--error);color:var(--error)}
.clear-cache-btn .material-icons-round{font-size:16px}
/* ═══ Mobile Dropdown ═══ */
.mobile-nav-wrapper{display:none}
/* Result card mobile styles */
.result-card{background:var(--surface-dim);border:1px solid var(--outline-variant);border-radius:12px;padding:14px;overflow:hidden}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:13px}
.result-label{color:var(--on-surface-variant);font-size:11px;text-transform:uppercase}
.result-value{font-weight:600;font-size:12px;word-break:break-all}
.result-header{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.result-score{text-align:center;min-width:60px}
.result-chips{display:flex;flex-wrap:wrap;gap:6px}
.result-chip{background:var(--surface);border:1px solid var(--outline-variant);padding:3px 10px;border-radius:6px;font-size:11px;font-family:JetBrains Mono,monospace;word-break:break-all;max-width:100%}
.flag-item{padding:6px 8px;margin:3px 0;background:var(--surface);border-radius:8px;border-left:3px solid #999;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.flag-severity{color:#fff;padding:1px 6px;border-radius:4px;font-size:10px;font-weight:700;white-space:nowrap}
.flag-issue{font-weight:600;font-size:13px}
.flag-detail{font-size:11px;color:var(--on-surface-variant);padding:2px 0 4px 0;width:100%}
.sev-badge{padding:2px 8px;border-radius:4px;font-size:11px;font-weight:700;color:#fff}
.risk-badge{padding:4px 14px;border-radius:20px;font-size:12px;font-weight:700;display:inline-block}
.summary-banner{border-radius:10px;padding:10px 14px;font-size:13px;font-weight:600}

@media(max-width:900px){.container{grid-template-columns:1fr;padding:12px}.sidebar{display:none!important}.mobile-nav-wrapper{display:block;margin-bottom:16px;position:relative}.mobile-nav-btn{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:var(--surface-container);border:1px solid var(--outline);border-radius:var(--radius-sm);color:var(--on-surface);font-family:Inter,sans-serif;font-size:15px;font-weight:600;cursor:pointer}.mobile-nav-btn .material-icons-round{font-size:20px;color:var(--primary)}.mobile-nav-dropdown{display:none;position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--surface-container);border:1px solid var(--outline);border-radius:var(--radius-sm);max-height:70vh;overflow-y:auto;z-index:200;box-shadow:0 12px 40px rgba(0,0,0,.5)}.mobile-nav-dropdown.open{display:block}.mobile-nav-dropdown .nav-item{padding:14px 18px;border-bottom:1px solid var(--outline-variant);white-space:nowrap}.mobile-nav-dropdown .nav-item:last-child{border-bottom:none}.mobile-nav-dropdown .nav-item.active{background:var(--surface-container-high);border-left:3px solid var(--primary)}.form-row,.form-row-3{grid-template-columns:1fr}.header{padding:12px 16px;flex-wrap:wrap;gap:8px}.header-status{display:none}.logo-text h1{font-size:16px}.logo-text p{font-size:10px}.card{padding:18px}.btn{padding:12px 20px;font-size:13px;width:100%}.toast-container{right:12px;left:12px}.toast{max-width:100%}
.result-grid{grid-template-columns:1fr}
.result-header{flex-direction:column;align-items:flex-start;gap:8px}
.result-score{text-align:left}
.result-chips{gap:4px}
.result-chip{padding:2px 8px;font-size:10px}
.flag-item{padding:5px 6px;gap:6px}
.flag-issue{font-size:12px}
.flag-detail{font-size:10px;padding-left:0}
.result-card{padding:10px}
.sev-badge{font-size:9px;padding:1px 5px}
.risk-badge{font-size:11px;padding:3px 10px}
.summary-banner{font-size:12px;padding:8px 10px}
}