:root {
  /* Modern color palette */
  --primary-color: #4361ee;
  --primary-hover: #3a56d4;
  --success-color: #06d6a0;
  --text-dark: #1d1d1d;
  --text-medium: #555;
  --text-light: #6c757d;
  --text-dark-hover: #333;
  --bg-light: #f8fafc;
  --border-color: #e0e5ec;
  --shadow-sm: 0 6px 20px rgba(0, 0, 0, 0.07);
  --shadow-primary: 0 8px 24px rgba(67, 97, 238, 0.15);
  --transition-standard: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --spacing-sm: 12px;
  --spacing-md: 24px;
  --border-radius: 8px;
  --gradient-primary: linear-gradient(135deg, #4361ee, #3a56d4);
  --gradient-success: linear-gradient(135deg, #06d6a0, #05c190);
}

* {
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: var(--bg-light);
  background-image: 
    radial-gradient(#4361ee15 1px, transparent 1px), 
    radial-gradient(#4361ee15 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: 0 0, 20px 20px;
  margin: 0;
  padding: var(--spacing-md);
}

.container {
  width: 100%;
  max-width: 420px;
  background: white;
  padding: 30px;
  border-radius: 16px;
  box-shadow: var(--shadow-sm), 0 0 0 1px rgba(0, 0, 0, 0.03);
  text-align: center;
  backdrop-filter: blur(10px);
}

input, select, button {
  width: 100%;
  padding: 14px 16px;
  margin-top: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 16px;
  outline: none;
  transition: all var(--transition-standard);
}

input, select {
  background-color: #f7f9fc;
}

input:focus, select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
  background-color: white;
}

button {
  background: var(--gradient-primary);
  color: white;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.3px;
  border: none;
  padding: 14px 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 12px rgba(67, 97, 238, 0.15);
}

button:hover {
  box-shadow: 0 6px 15px rgba(67, 97, 238, 0.25);
  transform: translateY(-2px);
}

button:active {
  transform: translateY(1px);
}

img {
  margin-top: var(--spacing-md);
  width: 100%;
  max-width: 250px;
  display: none;
  margin-inline: auto;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}

.hidden {
  display: none;
}

#url-info {
  margin-top: var(--spacing-md);
  text-align: left;
  font-size: 14px;
  padding: 16px;
  background: #f7f9fc;
  border-radius: var(--border-radius);
  border-left: 3px solid var(--primary-color);
}

#url-info p {
  margin: var(--spacing-sm) 0;
}

.url-text {
  word-break: break-all;
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-dark);
}

.copy-btn {
  background: var(--gradient-primary);
  border: none;
  padding: 10px 18px;
  font-size: 14px;
  cursor: pointer;
  color: white;
  border-radius: var(--border-radius);
  width: 100%;
  transition: all var(--transition-standard);
  box-shadow: 0 4px 10px rgba(67, 97, 238, 0.15);
}

.copy-btn:hover {
  box-shadow: 0 6px 15px rgba(67, 97, 238, 0.25);
  transform: translateY(-2px);
}

.copy-btn:active {
  transform: scale(0.98);
}

.copy-btn.copied {
  background: var(--gradient-success) !important;
  transform: scale(1.01);
}

.error-message {
  color: #e63946;
  font-size: 14px;
  margin-top: var(--spacing-sm);
  display: none;
  padding: 8px 12px;
  border-radius: var(--border-radius);
  background-color: rgba(230, 57, 70, 0.08);
}

.toast {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--primary-color);
  color: white;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  transition: all var(--transition-standard);
  box-shadow: var(--shadow-primary);
  backdrop-filter: blur(8px);
}

.toast.show {
  opacity: 1;
  transform: translateY(10px);
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--spacing-md);
  text-decoration: none;
  color: var(--primary-color);
  font-weight: 600;
  position: relative;
  transition: color var(--transition-standard);
  padding: 6px 12px;
  border-radius: 20px;
  background: rgba(67, 97, 238, 0.08);
}

.github-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--primary-color);
  transform: scaleX(0);
  transition: transform var(--transition-standard);
  transform-origin: center;
}

.github-link:hover {
  color: var(--primary-hover);
  background: rgba(67, 97, 238, 0.12);
}

.github-link:hover::after {
  transform: scaleX(1);
}

img.fade-in {
  opacity: 1 !important;
}

.download-animate {
  animation: scaleUp 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes scaleUp {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.cf-challenge {
  width: 100% !important;
  margin-block: 16px;
  display: flex;
  justify-content: center;
}

.cf-challenge iframe {
  border: 1px solid var(--border-color) !important;
  border-radius: 12px !important;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-standard);
}

.cf-challenge iframe:hover {
  border-color: var(--primary-color) !important;
  box-shadow: 0 5px 12px rgba(67, 97, 238, 0.15);
}

/* Add subtle hover effects to elements */
input:hover, select:hover {
  border-color: rgba(67, 97, 238, 0.5);
}