:root {
  --bg-dark: #090d16;
  --card-bg: rgba(18, 24, 38, 0.75);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-hover: rgba(99, 102, 241, 0.4);
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Background Atmospheric Glows */
.background-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.glow-sphere {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.25;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: #6366f1;
  top: -100px;
  left: 10%;
}

.glow-2 {
  width: 450px;
  height: 450px;
  background: #06b6d4;
  bottom: 5%;
  right: 10%;
}

.glow-3 {
  width: 350px;
  height: 350px;
  background: #ec4899;
  top: 40%;
  left: 50%;
}

/* Container */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
  position: relative;
  z-index: 1;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 20px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #a5b4fc;
  margin-bottom: 12px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.header h1 {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 40%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 4px;
}

.header-actions {
  display: flex;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: var(--font-body);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
}

/* Main Grid */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

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

/* Card */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  transition: border-color 0.2s ease;
}

.card:hover {
  border-color: var(--card-border-hover);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-header h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.badge {
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
}

.latency-badge {
  font-size: 0.8rem;
  font-weight: 600;
  color: #34d399;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 10px;
  border-radius: 999px;
}

/* Dropzone */
.dropzone {
  border: 2px dashed rgba(99, 102, 241, 0.35);
  background: rgba(99, 102, 241, 0.03);
  border-radius: var(--radius-md);
  padding: 32px 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
}

.file-input-hidden {
  display: none;
}

.upload-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 12px;
  background: rgba(99, 102, 241, 0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #818cf8;
}

.dropzone-title {
  font-weight: 600;
  font-size: 1rem;
}

.dropzone-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.highlight {
  color: #818cf8;
  text-decoration: underline;
}

.preview-container {
  position: relative;
  max-width: 100%;
  max-height: 260px;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.preview-container img {
  max-width: 100%;
  max-height: 240px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  display: block;
}

.btn-remove {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.2s;
}

.btn-remove:hover {
  background: #ef4444;
}

/* URL Input */
.url-input-group {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.input-wrapper {
  position: relative;
  flex: 1;
}

.input-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.input-wrapper input {
  width: 100%;
  padding: 10px 12px 10px 36px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.85rem;
  outline: none;
  font-family: var(--font-body);
}

.input-wrapper input:focus {
  border-color: var(--accent-primary);
}

/* Sample Pills */
.sample-section {
  margin-top: 16px;
}

.sample-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 8px;
}

.sample-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pill:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.4);
  color: #fff;
}

/* Submit Button */
.btn-submit {
  width: 100%;
  margin-top: 20px;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent-primary), #8b5cf6);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
  display: flex;
  justify-content: center;
  align-items: center;
}

.btn-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-icon {
  margin-bottom: 12px;
  opacity: 0.4;
}

/* Results View */
.summary-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.summary-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.summary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));
}

.summary-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 6px;
}

.summary-val {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.summary-conf {
  font-size: 0.8rem;
  font-weight: 600;
  color: #34d399;
  margin-top: 4px;
}

/* Confidence Breakdown Bars */
.breakdown-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.breakdown-section h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.accordion-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.accordion-header {
  padding: 10px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  background: rgba(255, 255, 255, 0.03);
}

.accordion-body {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bar-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bar-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
}

.bar-class {
  font-weight: 500;
  color: #e2e8f0;
}

.bar-val {
  font-weight: 600;
  color: var(--text-muted);
}

.bar-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));
  border-radius: 999px;
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-card {
  background: #131b2e;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  max-width: 640px;
  width: 100%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.modal-header {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--card-border);
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-tabs {
  display: flex;
  background: rgba(0, 0, 0, 0.3);
  padding: 6px 12px;
  gap: 8px;
  border-bottom: 1px solid var(--card-border);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--accent-primary);
  color: #fff;
}

.modal-body {
  padding: 20px;
}

.code-tab {
  display: none;
}

.code-tab.active {
  display: block;
}

pre {
  background: rgba(0, 0, 0, 0.4);
  padding: 16px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-size: 0.85rem;
  color: #e2e8f0;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.hidden {
  display: none !important;
}