/* Modern Light Theme Variables */
:root {
  --bg-color: #f8fafc;
  --text-active: #1e293b;
  --text-muted: #64748b;
  --accent-primary: #0ea5e9;
  --accent-secondary: #6366f1;
  --surface-color: rgba(255, 255, 255, 0.85);
  --surface-hover: rgba(255, 255, 255, 1);
  --border-color: rgba(226, 232, 240, 0.8);
  --glass-blur: blur(16px);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  background-image: 
    radial-gradient(circle at 0% 0%, rgba(14, 165, 233, 0.15) 0px, transparent 50%),
    radial-gradient(circle at 100% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(14, 165, 233, 0.1) 0px, transparent 50%),
    radial-gradient(circle at 0% 100%, rgba(99, 102, 241, 0.1) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-active);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 700px;
  padding: 2.5rem;
  animation: fadeIn 0.8s ease-out;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 3rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.05em;
  padding-bottom: 0.5rem;
}

ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Card / Link Styling */
.card-link {
  display: flex;
  align-items: center;
  padding: 1.75rem;
  background: var(--surface-color);
  backdrop-filter: var(--glass-blur);
  border: 1px solid white;
  border-radius: 1.5rem;
  text-decoration: none;
  color: var(--text-active);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
  opacity: 0.8;
  transition: var(--transition);
}

.card-link:hover {
  transform: translateY(-5px) scale(1.01);
  background: var(--surface-hover);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 1);
}

.card-link span.icon {
  font-size: 1.75rem;
  margin-right: 1.25rem;
  filter: grayscale(0.2);
  transition: var(--transition);
}

.card-link:hover span.icon {
  filter: grayscale(0) drop-shadow(0 2px 4px rgba(0,0,0,0.1));
  transform: scale(1.1);
}

/* Specific styling for the Upload Result Page */
.result-box {
  background: var(--surface-color);
  backdrop-filter: var(--glass-blur);
  border: 1px solid white;
  border-radius: 1.5rem;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

pre {
  background: #f1f5f9;
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  color: var(--text-active);
  overflow-x: auto;
  white-space: pre-wrap;
  font-family: 'Fira Code', 'Menlo', monospace;
  font-size: 0.95rem;
  line-height: 1.7;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 1.25rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  border-radius: 1rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.25);
  border: none;
  cursor: pointer;
}

.button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

footer {
  margin-top: 4rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Common Input Styles for Subpages */
input[type="text"], input[type="url"] {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-active);
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}

input[type="text"]:focus, input[type="url"]:focus {
  outline: none;
  border-color: var(--accent-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

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