:root {
  --color-bg: #0f172a;
  --color-bg-soft: #1e293b;
  --color-card: #1e293b;
  --color-border: #334155;
  --color-text: #f1f5f9;
  --color-text-soft: #94a3b8;
  --color-primary: #22c55e;
  --color-primary-hover: #16a34a;
  --color-secondary: #3b82f6;
  --color-secondary-hover: #2563eb;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  padding: 24px 16px;
}

.app {
  max-width: 880px;
  margin: 0 auto;
}

.app-header {
  text-align: center;
  margin-bottom: 32px;
  padding: 32px 16px;
}

.app-header h1 {
  font-size: clamp(24px, 5vw, 36px);
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #22c55e 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--color-text-soft);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
}

.app-main {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.app-footer {
  text-align: center;
  color: var(--color-text-soft);
  font-size: 14px;
  padding: 16px;
}

.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 15px;
}

.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--color-danger);
  color: #fca5a5;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 15px;
}

.required {
  color: var(--color-danger);
}

.form-group small {
  display: block;
  color: var(--color-text-soft);
  font-size: 13px;
  margin-top: 6px;
}

.form-group input[type="url"],
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input[type="url"]:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 200px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
  font-size: 13px;
  line-height: 1.5;
}

.form-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 28px 0;
  color: var(--color-text-soft);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 1px;
}

.form-divider::before,
.form-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.form-divider span {
  padding: 0 16px;
}

kbd {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: ui-monospace, monospace;
  font-size: 12px;
  color: var(--color-text);
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, background 0.2s, box-shadow 0.2s;
  text-align: center;
  font-family: inherit;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-primary);
  color: #052e16;
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.4);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.5);
}

.btn-secondary {
  background: var(--color-secondary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-secondary:hover {
  background: var(--color-secondary-hover);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-bg);
  border-color: var(--color-text-soft);
}

.btn-large {
  width: 100%;
  padding: 16px;
  font-size: 16px;
  margin-top: 8px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.form-note {
  text-align: center;
  color: var(--color-text-soft);
  font-size: 13px;
  margin-top: 20px;
}

.result-card {
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.result-header h2 {
  font-size: 22px;
  color: var(--color-primary);
}

.badge {
  background: rgba(34, 197, 94, 0.15);
  color: var(--color-primary);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.ctas-list {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.ctas-list summary {
  font-weight: 700;
  cursor: pointer;
  font-size: 15px;
  padding: 4px 0;
  list-style: none;
  display: flex;
  align-items: center;
}

.ctas-list summary::before {
  content: '\f054';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  display: inline-block;
  margin-right: 8px;
  font-size: 11px;
  transition: transform 0.2s;
}

.ctas-list[open] summary::before {
  transform: rotate(90deg);
}

.ctas-list ul {
  list-style: none;
  margin-top: 16px;
  padding-left: 0;
}

.ctas-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

.ctas-list li:last-child {
  border-bottom: none;
}

.ctas-list code {
  background: var(--color-bg-soft);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  word-break: break-all;
}

.cta-type {
  color: var(--color-warning);
  font-size: 12px;
  font-weight: 600;
  margin-left: 4px;
}

.warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fcd34d;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 14px;
}

.output-actions {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.output-actions h3 {
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--color-text);
}

.buttons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.new-clone {
  margin-top: 24px;
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.new-clone a {
  color: var(--color-text-soft);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.new-clone a:hover {
  color: var(--color-text);
}

@media (max-width: 640px) {
  body {
    padding: 16px 12px;
  }

  .app-main {
    padding: 20px 16px;
  }

  .result-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .buttons-grid {
    grid-template-columns: 1fr;
  }
}

/* Loading Overlay */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.95);
  z-index: 9999;
  justify-content: center;
  align-items: center;
}

.loading-overlay.active {
  display: flex;
}

.loading-box {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 50px;
  text-align: center;
  box-shadow: var(--shadow);
  min-width: 320px;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.loading-step {
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 16px;
  min-height: 20px;
}

.progress-bar-track {
  width: 100%;
  height: 6px;
  background: var(--color-bg);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.progress-bar-fill.indeterminate {
  width: 30%;
  animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

.loading-time {
  font-size: 13px;
  color: var(--color-text-soft);
}