/* Root Variables */
:root {
  --primary: #0066cc;
  --secondary: #0052a3;
  --success: #00aa00;
  --danger: #dd0000;
  --warning: #ff9900;
  --info: #0099cc;
  --light: #f8fafc;
  --dark: #1e293b;
  --text: #334155;

  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --transition: all 0.2s ease;
}

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

body {
  font-family: "Cairo", "Segoe UI", sans-serif;
  background: #f5f5f5;
  min-height: 100vh;
  direction: ltr;
  text-align: left;
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Navbar */
.navbar {
  background: var(--primary) !important;
  box-shadow: var(--shadow);
  padding: 1rem 0;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.4rem;
  color: white !important;
  transition: var(--transition);
}

.navbar-brand:hover {
  transform: scale(1.05);
}

.nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: 500;
  transition: var(--transition);
}

.nav-link:hover {
  color: white !important;
  transform: translateY(-2px);
}

/* Main Container */
.container {
  max-width: 1200px;
}

/* Upload Card */
.upload-card {
  border: none;
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  background: white;
}

.upload-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.card-header.bg-gradient {
  background: var(--primary) !important;
}

.card-title {
  color: white;
  font-weight: 700;
}

/* Upload Area */
.upload-area {
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  transition: var(--transition);
  background: #ffffff;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.upload-area::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: transparent;
  opacity: 0;
  transition: var(--transition);
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--secondary);
  background: #f0f4ff;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.15);
}

.upload-area.drag-over::before {
  opacity: 1;
}

.upload-content {
  pointer-events: none;
  position: relative;
  z-index: 1;
}

.upload-icon {
  font-size: 4rem;
  color: var(--primary);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* Buttons */
.btn-gradient {
  background: var(--primary);
  border: none;
  color: white;
  font-weight: 600;
  padding: 12px 32px;
  border-radius: var(--radius);
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.2);
}

.btn-gradient:hover {
  background: var(--secondary);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
  color: white;
}

.btn-gradient:active {
  transform: translateY(-1px);
}

/* Files Section */
#files-section {
  background: white;
  padding: 2rem;
  border-radius: var(--radius);
  margin-top: 3rem;
  box-shadow: var(--shadow);
}

#files-section h3 {
  color: var(--dark);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

/* File Items */
.files-list .file-item,
.files-grid .file-item {
  background: white;
  border-radius: var(--radius);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  transition: var(--transition);
  overflow: hidden;
  margin-bottom: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.files-list .file-item {
  display: flex;
  align-items: center;
  padding: 1.5rem;
}

.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.files-grid .file-item {
  display: flex;
  flex-direction: column;
  padding: 2rem 1.5rem;
  text-align: center;
}

.file-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

/* File Icon */
.file-icon {
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  font-size: 1.8rem;
  color: white;
  margin-left: 1.5rem;
  flex-shrink: 0;
  font-weight: bold;
}

.files-grid .file-icon {
  width: 90px;
  height: 90px;
  font-size: 2.5rem;
  margin: 0 auto 1rem auto;
}

.file-icon.md {
  background: var(--primary);
}

.file-icon.pdf {
  background: var(--danger);
}

/* File Info */
.file-info {
  flex: 1;
  min-width: 0;
}

.file-info h5 {
  margin: 0 0 0.5rem 0;
  font-weight: 700;
  color: var(--dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 1rem;
}

.file-meta {
  color: #94a3b8;
  font-size: 0.85rem;
  margin: 0;
}

/* File Actions */
.file-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.files-grid .file-actions {
  justify-content: center;
  margin-top: 1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  border: none;
}

.btn-primary:hover {
  background: var(--secondary);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
}

.btn-success {
  background: var(--success);
  border: none;
}

.btn-danger {
  background: var(--danger);
  border: none;
}

/* Selected Files */
.selected-file {
  display: flex;
  align-items: center;
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
  transition: var(--transition);
}

.selected-file:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.selected-file .file-icon {
  width: 50px;
  height: 50px;
  font-size: 1.2rem;
  margin-left: 1rem;
}

/* Progress Bar */
.progress {
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  background: var(--primary);
  transition: width 0.5s ease;
  border-radius: 4px;
}

/* Modals */
.modal-content {
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.modal-header {
  background: var(--primary);
  color: white;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-weight: 700;
}
.btn-close {
  margin: 0 !important;
}
.btn-close-white {
  filter: brightness(0) invert(1);
}

/* Markdown Content */
.markdown-content {
  padding: 2rem;
  line-height: 1.8;
  font-size: 1rem;
}

.markdown-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin: 2rem 0 1rem;
  color: var(--dark);
  border-bottom: 3px solid var(--primary);
  padding-bottom: 0.5rem;
}

.markdown-content h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 1.8rem 0 0.8rem;
  color: var(--primary);
}

.markdown-content h3 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--secondary);
  margin: 1.5rem 0 0.75rem;
}

.markdown-content code {
  background: #f1f5f9;
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  font-family: "Monaco", "Menlo", monospace;
  font-size: 0.9rem;
  color: var(--danger);
}

.markdown-content pre {
  background: #1e293b;
  padding: 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.markdown-content pre code {
  background: none;
  color: #e2e8f0;
  padding: 0;
}

.markdown-content blockquote {
  border-right: 4px solid var(--primary);
  padding-right: 1rem;
  margin: 1.5rem 0;
  color: #64748b;
  font-style: italic;
  background: rgba(99, 102, 241, 0.05);
  padding: 1rem;
  border-radius: 8px;
}

/* Empty State */
#emptyState {
  text-align: center;
  padding: 3rem 1rem;
  color: #94a3b8;
}

#emptyState i {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  opacity: 0.6;
}

/* Badges */
.badge {
  padding: 0.6rem 1rem;
  font-weight: 600;
  border-radius: 8px;
  font-size: 0.85rem;
}

/* Animations */
.fade-in {
  animation: fadeIn 0.3s ease-in-out;
}

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

/* Toast */
.toast {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.toast-header {
  font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
  .upload-area {
    padding: 2rem 1rem;
  }

  .upload-icon {
    font-size: 2.5rem;
  }

  .files-grid {
    grid-template-columns: 1fr;
  }

  .file-item {
    padding: 1rem;
  }

  .files-list .file-icon {
    width: 50px;
    height: 50px;
    margin-left: 1rem;
  }

  .file-actions {
    flex-direction: row;
    width: 100%;
  }

  .navbar-brand {
    font-size: 1.1rem;
  }
}

@media (max-width: 576px) {
  body {
    padding: 0;
  }

  .container {
    padding: 1rem;
  }

  .card {
    border-radius: 0;
    margin: 0;
  }

  .upload-area {
    padding: 1.5rem 1rem;
  }

  .file-info h5 {
    font-size: 0.9rem;
  }

  .file-meta {
    font-size: 0.75rem;
  }

  .btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary);
}

.btn-group {
  gap: 10px;
}
.btn-group .btn {
  border-radius: 0;
}