@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  --bg-dark: #0b0f19;
  --bg-card: rgba(18, 26, 43, 0.75);
  --bg-card-hover: rgba(26, 37, 60, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-highlight: rgba(99, 102, 241, 0.4);
  
  --accent-primary: #6366f1;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-glow: rgba(99, 102, 241, 0.35);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.3);
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(168, 85, 247, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.8) 0%, var(--bg-dark) 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Header Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2.5rem;
  background: rgba(11, 15, 25, 0.7);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--accent-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--success);
  padding: 0.4rem 0.9rem;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
}

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

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Main Container Layout */
.container {
  max-width: 1200px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

.hero-section {
  text-align: center;
  margin-bottom: 2.5rem;
}

.hero-title {
  font-size: 2.8rem;
  margin-bottom: 0.75rem;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto;
}

/* Upload Dropzone */
.dropzone-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 2px dashed rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.dropzone-card:hover, .dropzone-card.dragover {
  border-color: var(--accent-primary);
  background: var(--bg-card-hover);
  box-shadow: 0 0 35px var(--accent-glow);
  transform: translateY(-2px);
}

.dropzone-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.25rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--accent-primary);
  transition: var(--transition-fast);
}

.dropzone-card:hover .dropzone-icon {
  transform: scale(1.1);
  background: var(--accent-gradient);
  color: white;
}

.dropzone-title {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.dropzone-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  border: none;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 4px 20px var(--accent-glow);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(168, 85, 247, 0.45);
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #111827;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 750px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  transform: scale(0.95);
  transition: var(--transition-smooth);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

.close-btn:hover {
  color: white;
}

.modal-body {
  padding: 2rem;
}

/* Configuration Form Grid */
.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.form-select, .form-input {
  background: rgba(17, 24, 39, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-main);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-select:focus, .form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* Checkbox Grid */
.checkbox-group {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  cursor: pointer;
  user-select: none;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.checkbox-label:hover {
  color: white;
}

.checkbox-input {
  accent-color: var(--accent-primary);
  width: 16px;
  height: 16px;
}

/* Progress & Status Card */
.progress-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 2rem;
  display: none;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.progress-bar-bg {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  border-radius: 5px;
  transition: width 0.4s ease;
  box-shadow: 0 0 15px var(--accent-glow);
}

.log-terminal {
  background: #050810;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.85rem;
  color: #38bdf8;
  height: 160px;
  overflow-y: auto;
  line-height: 1.5;
}

/* History Section */
.history-section {
  margin-top: 3rem;
}

.history-title {
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.history-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-fast);
}

.history-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-2px);
}

.file-info-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.file-info-sub {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.btn-download {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: var(--success);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-fast);
}

.btn-download:hover {
  background: var(--success);
  color: white;
  box-shadow: 0 0 15px var(--success-glow);
}