/* Instagram-inspired CSS with cute, modern design */
:root {
  --instagram-gradient: linear-gradient(
    45deg,
    #f09433 0%,
    #e6683c 25%,
    #dc2743 50%,
    #cc2366 75%,
    #bc1888 100%
  );
  --instagram-blue: #405de6;
  --instagram-purple: #833ab4;
  --instagram-pink: #fd1d1d;
  --light-gray: #fafafa;
  --medium-gray: #dbdbdb;
  --dark-gray: #262626;
  --success-green: #00d4aa;
  --warning-orange: #ff9500;
  --error-red: #ed4956;
  --text-primary: #262626;
  --text-secondary: #8e8e8e;
  --white: #ffffff;
  --border-radius: 12px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  line-height: 1.6;
  color: var(--text-primary);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* Header Styles */
.header {
  text-align: center;
  margin-bottom: 40px;
  background: var(--white);
  padding: 30px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin-bottom: 10px;
}

.logo i {
  font-size: 2.5rem;
  background: var(--instagram-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--instagram-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-top: 10px;
}

/* Instructions Card */
.instructions-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: var(--shadow);
}

.instructions-card h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 25px;
  color: var(--instagram-purple);
  font-size: 1.5rem;
}

.steps {
  display: grid;
  gap: 20px;
  margin-bottom: 25px;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 20px;
  background: var(--light-gray);
  border-radius: var(--border-radius);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.step-number {
  background: var(--instagram-gradient);
  color: var(--white);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
}

.step-content h3 {
  margin-bottom: 5px;
  color: var(--text-primary);
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.tip {
  background: linear-gradient(135deg, #667eea22, #764ba222);
  border-left: 4px solid var(--instagram-blue);
  padding: 15px 20px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.tip i {
  color: var(--instagram-blue);
  margin-top: 2px;
}

.tip p {
  margin: 0;
}

/* Upload Section */
.upload-section {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: var(--shadow);
}

.upload-section h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 25px;
  color: var(--instagram-purple);
  font-size: 1.5rem;
}

.upload-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.upload-card {
  border: 2px dashed var(--medium-gray);
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
}

.upload-card:hover {
  border-color: var(--instagram-purple);
  transform: translateY(-2px);
}

.upload-card.file-uploaded {
  border-color: var(--success-green);
  background: rgba(0, 212, 170, 0.05);
}

.upload-area {
  padding: 30px;
  text-align: center;
}

.upload-area i {
  font-size: 3rem;
  color: var(--instagram-purple);
  margin-bottom: 15px;
  display: block;
}

.upload-area h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.upload-area p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.upload-btn {
  background: var(--instagram-gradient);
  color: var(--white);
  border: none;
  padding: 12px 24px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.file-status {
  margin-top: 15px;
  font-size: 0.9rem;
  font-weight: 500;
}

.file-status.success {
  color: var(--success-green);
}

.file-status.error {
  color: var(--error-red);
}

/* Analyze Section */
.analyze-section {
  text-align: center;
}

.analyze-btn {
  background: var(--instagram-gradient);
  color: var(--white);
  border: none;
  padding: 18px 40px;
  border-radius: 30px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.analyze-btn:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.analyze-btn:disabled {
  background: var(--medium-gray);
  cursor: not-allowed;
  opacity: 0.6;
}

/* Loading Section */
.loading-section {
  text-align: center;
  padding: 50px;
  background: var(--white);
  border-radius: var(--border-radius);
  margin-bottom: 30px;
  box-shadow: var(--shadow);
}

.loading-spinner i {
  font-size: 3rem;
  color: var(--instagram-purple);
  margin-bottom: 20px;
}

.loading-section p {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* Results Section */
.results-section {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: var(--shadow);
}

.results-section h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 25px;
  color: var(--instagram-purple);
  font-size: 1.5rem;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: linear-gradient(135deg, #667eea11, #764ba211);
  padding: 25px;
  border-radius: var(--border-radius);
  text-align: center;
  position: relative;
  border: 1px solid var(--medium-gray);
  transition: transform 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--instagram-purple);
  margin-bottom: 5px;
}

.stat-label {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.stat-icon {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 1.5rem;
  color: var(--instagram-purple);
  opacity: 0.3;
}

/* Results Grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 30px;
}

.result-card {
  background: var(--light-gray);
  padding: 25px;
  border-radius: var(--border-radius);
  border: 1px solid var(--medium-gray);
}

.result-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--text-primary);
  font-size: 1.2rem;
}

.user-list {
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 20px;
  padding: 10px;
  background: var(--white);
  border-radius: 8px;
  border: 1px solid var(--medium-gray);
}

.user-item {
  padding: 8px 12px;
  border-bottom: 1px solid var(--light-gray);
  font-size: 0.95rem;
  color: var(--text-primary);
}

.user-item:last-child {
  border-bottom: none;
}

.user-item:hover {
  background: var(--light-gray);
}

.download-btn {
  background: var(--success-green);
  color: var(--white);
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Footer */
.footer {
  text-align: center;
  padding: 30px;
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  backdrop-filter: blur(10px);
}

.footer p {
  margin-bottom: 10px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }

  .header h1 {
    font-size: 2rem;
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .step {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .header {
    padding: 20px;
  }

  .instructions-card,
  .upload-section,
  .results-section {
    padding: 20px;
  }
}

/* Custom scrollbar for user lists */
.user-list::-webkit-scrollbar {
  width: 6px;
}

.user-list::-webkit-scrollbar-track {
  background: var(--light-gray);
  border-radius: 3px;
}

.user-list::-webkit-scrollbar-thumb {
  background: var(--medium-gray);
  border-radius: 3px;
}

.user-list::-webkit-scrollbar-thumb:hover {
  background: var(--instagram-purple);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.results-section {
  animation: fadeIn 0.5s ease-out;
}

/* Code styling */
code {
  background: rgba(38, 38, 38, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "Monaco", "Menlo", "Ubuntu Mono", monospace;
  font-size: 0.9em;
  color: var(--instagram-purple);
}