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

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-card: #1c2128;
  --border-color: #30363d;
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-primary: #58a6ff;
  --accent-secondary: #238636;
  --accent-danger: #f85149;
  --accent-warning: #d29922;
  --accent-purple: #bc8cff;
  --glow-color: rgba(88, 166, 255, 0.3);
  --gradient-primary: linear-gradient(135deg, #58a6ff, #bc8cff);
  --gradient-secondary: linear-gradient(135deg, #238636, #58a6ff);
  --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.5);
}

body {
  font-family: "JetBrains Mono", "Segoe UI", system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  background-image: radial-gradient(
      circle at 20% 80%,
      rgba(88, 166, 255, 0.05) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(188, 140, 255, 0.05) 0%,
      transparent 50%
    );
}

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

.header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem 0;
  background: var(--bg-secondary);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  text-shadow: 0 0 20px var(--glow-color);
}

.header h2 {
  font-size: 1.5rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  font-style: italic;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-soft);
  transition: all 0.3s ease;
  position: relative;
}

.card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-strong), 0 0 20px var(--glow-color);
  transform: translateY(-2px);
}

.card h3 {
  color: var(--accent-primary);
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
}

.card h3::before {
  content: "▶";
  margin-right: 0.5rem;
  color: var(--accent-secondary);
}

.input-group {
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
}

textarea {
  width: 100%;
  min-height: 100px;
  padding: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.9rem;
  resize: vertical;
  transition: all 0.3s ease;
}

textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px var(--glow-color);
}

textarea::placeholder {
  color: var(--text-muted);
}

#fileInput {
  display: none;
}

#loadFileBtn,
#generateKey {
  margin-top: 0.5rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(88, 166, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(88, 166, 255, 0.4);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--border-color);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--accent-danger);
  color: white;
  box-shadow: 0 4px 15px rgba(248, 81, 73, 0.3);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(248, 81, 73, 0.4);
}

.btn-accent {
  background: var(--gradient-secondary);
  color: white;
  box-shadow: 0 4px 15px rgba(35, 134, 54, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(35, 134, 54, 0.4);
}

.button-group {
  display: flex;
  gap: 1rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

.analysis-result {
  background: var(--bg-tertiary);
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid var(--accent-secondary);
  min-height: 100px;
}

.analysis-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.analysis-table th,
.analysis-table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.analysis-table th {
  background: var(--bg-tertiary);
  color: var(--accent-primary);
  font-weight: 600;
}

.analysis-table tr:hover {
  background: var(--bg-secondary);
}

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

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

  .header h2 {
    font-size: 1.2rem;
  }

  .card {
    padding: 1.5rem;
  }

  .button-group {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: fadeInUp 0.6s ease forwards;
}

.card:nth-child(2) {
  animation-delay: 0.1s;
}
.card:nth-child(3) {
  animation-delay: 0.2s;
}
.card:nth-child(4) {
  animation-delay: 0.3s;
}

.loading {
  position: relative;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

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