:root {
  --bg-color: #0b0f17;
  --card-bg: rgba(18, 24, 38, 0.85);
  --card-border: rgba(255, 255, 255, 0.08);
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.35);
  --accent-emerald: #10b981;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 20px;
  position: relative;
  overflow-x: hidden;
}

/* Ambient Background Glows */
.ambient-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}
.glow-1 {
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  top: -100px;
  left: 20%;
}
.glow-2 {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, transparent 70%);
  bottom: -100px;
  right: 20%;
}

.container {
  width: 100%;
  max-width: 840px;
  position: relative;
  z-index: 1;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.brand h1 {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand h1 span {
  background: linear-gradient(90deg, #60a5fa, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.model-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  padding: 6px 14px;
  border-radius: 100px;
}

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

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.model-selector {
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
}

.model-selector option {
  background: #1e293b;
  color: var(--text-main);
}

/* Main Card */
.main-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.rules-pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.pill {
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 5px 12px;
  border-radius: 100px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Dropzone */
.dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 44px 20px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(255, 255, 255, 0.015);
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.05);
  transform: translateY(-2px);
}

.upload-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--primary);
}

.dropzone h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
  font-weight: 600;
}

.dropzone p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 18px;
}

.btn-browse {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-browse:hover {
  background: rgba(255, 255, 255, 0.14);
}

/* File List */
.file-list-section {
  margin-top: 24px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.section-header h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.btn-clear {
  background: transparent;
  border: none;
  color: #ef4444;
  font-size: 0.8rem;
  cursor: pointer;
}

.file-cards-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.file-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.file-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: #1e293b;
  color: var(--primary);
  padding: 4px 8px;
  border-radius: 4px;
}

.file-name {
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 480px;
}

.file-size {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.btn-remove-file {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
}

.btn-remove-file:hover {
  color: #ef4444;
}

/* Buttons */
.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border: none;
  border-radius: var(--radius-md);
  padding: 16px;
  color: white;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 20px var(--primary-glow);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.5);
}

.btn-text {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

/* Processing State */
.processing-section {
  text-align: center;
  padding: 40px 20px;
}

.spinner-ring {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(59, 130, 246, 0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

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

.processing-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 6px;
  margin-bottom: 24px;
}

.progress-bar-bg {
  width: 100%;
  max-width: 400px;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 100px;
  margin: 0 auto;
  overflow: hidden;
}

.progress-bar-fill {
  width: 30%;
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: 100px;
  animation: progressPulse 1.8s ease-in-out infinite alternate;
}

@keyframes progressPulse {
  0% { width: 15%; transform: translateX(0); }
  100% { width: 85%; transform: translateX(15%); }
}

/* Result Section */
.success-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.success-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.result-details {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.9rem;
}

.detail-label {
  color: var(--text-muted);
  font-weight: 500;
}

.detail-value {
  font-weight: 600;
}

.detail-value.highlight {
  color: #60a5fa;
}

.filename-box {
  font-family: 'JetBrains Mono', monospace;
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  color: #f1f5f9;
}

.download-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-download {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  text-decoration: none;
  padding: 16px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
  transition: var(--transition);
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(16, 185, 129, 0.45);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: 12px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

/* Footer Specs */
.app-footer {
  margin-top: 24px;
}

.rules-accordion {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
}

.rules-accordion summary {
  font-weight: 600;
  outline: none;
}

.rules-body {
  margin-top: 14px;
  line-height: 1.6;
}

.rules-body ul {
  padding-left: 20px;
}

.rules-body li {
  margin-bottom: 6px;
}

.rules-body code {
  font-family: 'JetBrains Mono', monospace;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  color: #93c5fd;
}