:root {
  --bg-color: #0f172a;
  --text-color: #f8fafc;
  --accent-color: #38bdf8;
  --accent-hover: #0ea5e9;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(148, 163, 184, 0.1);
  --glass-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  background-image: 
    radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
  background-attachment: fixed;
}

.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

header {
  margin-bottom: 3rem;
  text-align: center;
  animation: fadeInDown 0.8s ease-out;
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(to right, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5rem;
  letter-spacing: -0.025em;
}

.subtitle {
  color: #94a3b8;
  font-size: 1.1rem;
}

.card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--glass-shadow);
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out;
}

.file-list {
  list-style: none;
  display: grid;
  gap: 1rem;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 0.75rem;
  transition: all 0.2s ease;
}

.file-item:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.3);
}

.file-name {
  font-weight: 500;
  color: var(--text-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  gap: 0.75rem;
  word-break: break-all;
  flex: 1;
  min-width: 0;
  margin-right: 1rem;
}

.file-icon {
  color: var(--accent-color);
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
  gap: 0.5rem;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent-color);
  color: #0f172a;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: #94a3b8;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.2);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.4);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (max-width: 640px) {
  body {
    padding: 1rem;
  }

  h1 {
    font-size: 2rem;
  }

  .card {
    padding: 1.5rem;
  }

  .file-item {
    padding: 0.75rem;
  }
  
  .section-title {
    font-size: 1.1rem;
  }
}