:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-focus: #3b82f6;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --danger: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
}

body {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  font-family: 'Noto Sans Arabic', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  font-size: 14px;
  direction: rtl;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
  color: white;
  text-align: center;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
  transition: all 0.2s ease;
  margin-bottom: 2rem;
}

.hidden { display: none; }

.progress {
  margin-top: 1rem;
  display: grid;
  gap: 0.75rem;
}

.progress-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
}

.progress-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.progress-track {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent) 0%, #60a5fa 100%);
  transition: width 0.2s ease;
}

.progress-percent {
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
  width: 3ch;
  text-align: end;
}

.progress-status {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.card:hover {
  box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

.field {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
}

input[type="file"] {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  transition: all 0.2s ease;
  cursor: pointer;
}

input[type="file"]:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea {
  width: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  resize: vertical;
  min-height: 100px;
  transition: all 0.2s ease;
  font-family: inherit;
}

textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

button:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  max-height: 60vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* Ensure analysis card does not overlap footer and stays within viewport */
#analysis-card {
  margin-bottom: 0;
}

#analysis-card .messages {
  max-height: min(65vh, 700px);
}

main {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  flex: 1 0 auto;
}

footer {
  flex-shrink: 0;
}

.messages::-webkit-scrollbar {
  width: 6px;
}

.messages::-webkit-scrollbar-track {
  background: transparent;
}

.messages::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem 1rem;
  font-style: italic;
}

.msg {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  animation: fadeIn 0.3s ease;
}

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

.role {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.bubble {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.msg .bubble::before {
  content: '';
  position: absolute;
  top: -1px;
  right: 1rem;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid var(--border);
}

.msg .bubble::after {
  content: '';
  position: absolute;
  top: 0px;
  right: 1rem;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid var(--bg-secondary);
}

.typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0.5rem 0;
}

.typing-dot {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: blink 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

.followup {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr auto;
  align-items: end;
  margin-top: 2rem;
}

.followup textarea {
  grid-column: 1 / -1;
  min-height: 80px;
}

.followup button {
  grid-column: 2;
}

.markdown {
  line-height: 1.7;
}

.markdown code {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.125rem 0.375rem;
  font-size: 0.8rem;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.markdown pre {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.8rem;
}

.markdown p,
.markdown li,
.markdown blockquote,
.markdown table,
.markdown code,
.markdown pre,
.markdown {
  word-break: break-word;
  overflow-wrap: anywhere;
}

.markdown pre code {
  background: none;
  border: none;
  padding: 0;
}

.markdown a {
  color: var(--accent);
  text-decoration: none;
}

.markdown a:hover {
  text-decoration: underline;
}

.markdown h1, .markdown h2, .markdown h3, .markdown h4, .markdown h5, .markdown h6 {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.markdown p {
  margin-bottom: 1rem;
}

.markdown ul, .markdown ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.markdown li {
  margin-bottom: 0.25rem;
}

footer {
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
  margin-top: auto;
  padding-top: 1rem;
}

@media (max-width: 640px) {
  .container {
    padding: 1rem;
    gap: 1rem;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  .card {
    padding: 1rem;
  }
  
  .followup {
    grid-template-columns: 1fr;
  }
  
  .followup button {
    grid-column: 1;
    justify-self: start;
  }
}