@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");

:root {
  --bg-color: #0d1117;
  --bg-gradient: radial-gradient(circle at top right, #1a2333, #0d1117);
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent-color: #58a6ff;
  --accent-hover: #3182ce;
  --panel-bg: rgba(22, 27, 34, 0.65);
  --panel-border: rgba(48, 54, 61, 0.5);
  --input-bg: rgba(13, 17, 23, 0.7);
  --input-border: #30363d;
  --input-focus: #58a6ff;
  --success-color: #238636;
  --error-color: #f85149;

  --glass-blur: blur(12px);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

  --transition-speed: 0.2s;
}

* {
  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);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #58a6ff 0%, #bc8cff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
}

.subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 3rem;
  font-weight: 300;
}

/* Glassmorphism Panel Container */
.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  gap: 2rem;
  animation: fadeIn 0.6s ease-out;
}

@media (min-width: 768px) {
  .glass-panel {
    flex-direction: row;
    align-items: stretch;
  }
}

.form-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.preview-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  overflow: hidden;
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-speed) ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

.form-group select option {
  background-color: var(--bg-color);
  color: var(--text-primary);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--input-border);
  border-radius: 4px;
  background: var(--input-bg);
  cursor: pointer;
  position: relative;
  transition: all var(--transition-speed);
}

.checkbox-group input[type="checkbox"]:checked {
  background: var(--accent-color);
  border-color: var(--accent-color);
}

.checkbox-group input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 6px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.form-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* Tabs */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--panel-border);
  background: rgba(13, 17, 23, 0.5);
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 1rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed);
  border-bottom: 2px solid transparent;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
  background: rgba(88, 166, 255, 0.1);
}

/* Code Preview */
.code-container {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
}

.code-container pre {
  margin: 0;
  padding: 1.5rem;
  overflow-x: auto;
  font-family:
    "ui-monospace", "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.9rem;
  color: #c9d1d9;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  height: 100%;
}

.copy-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(48, 54, 61, 0.8);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  backdrop-filter: blur(4px);
}

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

.copy-btn.copied {
  background: var(--success-color);
  border-color: var(--success-color);
  color: white;
}

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