:root {
  --bg-color: #0b0f19;
  --card-bg: rgba(22, 31, 49, 0.7);
  --card-border: rgba(255, 255, 255, 0.08);
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.35);
  --secondary: #8b5cf6;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --danger: #ef4444;
  --success: #10b981;
  --radius: 12px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  background-color: var(--bg-color);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.15) 0%, transparent 40%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px;
}

.app-container {
  width: 100%;
  max-width: 1000px;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  margin-bottom: 24px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-accent {
  background: linear-gradient(135deg, #6366f1, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Cards & Layout */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(11, 15, 25, 0.6);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 0.95rem;
  transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.help-text {
  font-size: 0.75rem;
  color: #6b7280;
  margin-top: 4px;
  display: block;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-secondary {
  background: #374151;
  color: #fff;
}

.btn-secondary:hover {
  background: #4b5563;
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.3);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Auth Card */
.auth-card {
  max-width: 420px;
  margin: 40px auto;
}

.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 20px;
}

.tab-btn {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  font-size: 2rem;
}

.stat-title {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 800;

  color: #fff;
}

/* Action Grid */
.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .action-grid, .form-row {
    grid-template-columns: 1fr;
  }
}

/* Links List */
.link-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: rgba(11, 15, 25, 0.4);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  margin-bottom: 12px;
}

.link-main-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.link-short-url {
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  font-size: 1.05rem;
}

.link-short-url:hover {
  text-decoration: underline;
}

.link-target-url {
  font-size: 0.875rem;
  color: var(--text-muted);
  word-break: break-all;
  background: rgba(255, 255, 255, 0.03);
  padding: 4px 8px;
  border-radius: 4px;
}

.protocol-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(139, 92, 246, 0.2);
  color: #c084fc;
  margin-right: 6px;
}

.link-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.link-meta {
  display: flex;
  gap: 16px;
  font-size: 0.75rem;
  color: #6b7280;
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  width: 90%;
  max-width: 480px;
}

.smart-modal-content {
  max-width: 640px;
  max-height: 88vh;
  overflow-y: auto;
}

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

.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 20px;
}

.qr-body img {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  border: 4px solid #fff;
  margin: 16px 0;
}

.qr-url-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hidden {
  display: none !important;
}

/* Domain Selector */
.domain-card {
  border-left: 3px solid var(--primary);
}

.domain-selector {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.domain-btn {
  flex: 1;
  min-width: 140px;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: rgba(11, 15, 25, 0.6);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

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

.domain-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.search-input {
  padding: 6px 12px;
  font-size: 0.8rem;
  background: rgba(11, 15, 25, 0.6);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-main);
  width: 200px;
  transition: all 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  width: 240px;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2000;
}

.toast {
  padding: 12px 20px;
  border-radius: 8px;
  background: #1f2937;
  color: #fff;
  border: 1px solid var(--card-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  font-size: 0.9rem;
  animation: slideIn 0.3s ease;
}

.toast-success {
  border-left: 4px solid var(--success);
}

.toast-error {
  border-left: 4px solid var(--danger);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}