frontend/style.css

/* --- Global Styles & Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --accent-primary: #e94560;
  --accent-secondary: #53bf9d;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0c0;
  --border-color: #3a3a5e;
  --shadow-color: rgba(233, 69, 96, 0.1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 40px 20px;
}

/* --- Main Container --- */
.container {
  width: 100%;
  max-width: 1200px;
  background: var(--bg-secondary);
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
  padding: 40px;
  border: 1px solid var(--border-color);
}

/* --- Header --- */
.header {
  text-align: center;
  margin-bottom: 30px;
}
.logo-circle {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--accent-primary), var(--bg-tertiary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: #fff;
  margin: 0 auto 12px;
  box-shadow: 0 4px 15px var(--shadow-color);
}
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #fff;
}
.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: 5px;
}

/* --- Drag and Drop Area --- */
.drag-area {
  border: 2px dashed var(--border-color);
  background: rgba(15, 52, 96, 0.3);
  padding: 40px;
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}
.drag-area.dragover {
  border-color: var(--accent-primary);
  background: rgba(233, 69, 96, 0.1);
}
#dragText, .drag-area p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 15px;
}
.file-label {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 12px 25px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  display: inline-block;
  transition: background 0.2s, transform 0.2s;
}
.file-label:hover {
  background: var(--accent-primary);
  transform: translateY(-2px);
}

/* --- Action Buttons --- */
.action-btn {
  background: linear-gradient(90deg, var(--accent-secondary), var(--bg-tertiary));
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 14px 30px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(83, 191, 157, 0.15);
  transition: all 0.3s ease;
  width: 100%;
  margin-top: 20px;
}
.action-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(83, 191, 157, 0.25);
}
.action-btn.download-btn {
    background: linear-gradient(90deg, var(--accent-primary), #c42d45);
    text-decoration: none;
    text-align: center;
}

/* --- Results and Preview --- */
#results-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-top: 30px;
}

/* --- Preview Area --- */
#previewSection {
  display: flex;
  flex-direction: column;
}
.preview-tabs {
  display: flex;
  border-radius: 8px 8px 0 0;
  overflow: hidden;
}
.tab-btn {
  flex: 1;
  padding: 14px 0;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: none;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border-bottom: 3px solid transparent;
}
.tab-btn.active {
  color: #fff;
  background: var(--bg-secondary);
  border-bottom-color: var(--accent-primary);
}
.preview-content {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 8px 8px;
  flex-grow: 1;
}
.preview-pane {
  padding: 20px;
  overflow: auto;
  height: 600px;
  color: var(--text-primary);
}
.preview-pane canvas {
    max-width: 100%;
    border-radius: 4px;
    margin-bottom: 10px;
}

/* --- Entities List --- */
#entitiesSection {
  display: flex;
  flex-direction: column;
}
#entitiesList {
  background: var(--bg-primary);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  padding: 20px;
  flex-grow: 1;
  max-height: 550px;
  overflow-y: auto;
  margin-bottom: 20px;
}
.entity-item {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 12px 18px;
  margin-bottom: 12px;
  font-size: 1rem;
  border-left: 4px solid var(--accent-secondary);
  transition: background 0.2s;
}
.entity-item:hover {
    background: var(--bg-tertiary);
}
.entity-checkbox {
  accent-color: var(--accent-primary);
  width: 20px;
  height: 20px;
  margin-right: 15px;
}
.entity-label {
  background: var(--accent-primary);
  color: #fff;
  border-radius: 5px;
  padding: 4px 10px;
  font-size: 0.9em;
  font-weight: 600;
  margin-right: 12px;
}

/* --- Loader & Error --- */
#loader {
  text-align: center;
  margin-top: 40px;
  color: var(--text-secondary);
  font-size: 1.1rem;
}
.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 15px;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

#error {
  color: var(--accent-primary);
  background: rgba(233, 69, 96, 0.1);
  border: 1px solid var(--accent-primary);
  border-radius: 8px;
  padding: 15px 20px;
  margin-top: 20px;
  text-align: center;
  font-weight: 600;
}

.hidden {
  display: none;
}