/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* CSS Variables - Design System */
:root {
  /* Colors - Green Theme */
  --primary-500: #10b981;
  /* Emerald 500 */
  --primary-600: #059669;
  /* Emerald 600 */
  --primary-700: #047857;
  /* Emerald 700 */

  --secondary-500: #14b8a6;
  /* Teal 500 */
  --secondary-600: #0d9488;
  /* Teal 600 */

  --success-500: #10b981;
  --success-600: #059669;

  --warning-500: #fbbf24;
  --warning-600: #d97706;

  --error-500: #ef4444;
  --error-600: #dc2626;

  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(135deg, #10b981 0%, #14b8a6 50%, #34d399 100%);
  background-size: 200% 200%;
  animation: gradientBG 15s ease infinite;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@keyframes gradientBG {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

/* Container */
.container {
  width: 100%;
  max-width: 600px;
  animation: fadeIn var(--transition-slow) ease-out;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.logo svg {
  animation: float 3s ease-in-out infinite;
}

.logo h1 {
  font-size: 2rem;
  font-weight: 700;
  color: white;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.tagline {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  font-weight: 500;
}

/* Tabs */
.tabs-container {
  display: flex;
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  padding: 4px;
  border-radius: var(--radius-xl);
  margin-bottom: var(--spacing-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.75rem;
  border: none;
  background: transparent;
  color: white;
  font-weight: 600;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  opacity: 0.7;
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  opacity: 1;
}

.tab-btn.active {
  background: white;
  color: var(--primary-600);
  opacity: 1;
  box-shadow: var(--shadow-sm);
}

/* Card */
.card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-2xl);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.3);
}

.card h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.card-description {
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  font-size: 0.95rem;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
}

.required {
  color: var(--error-500);
}

input[type="text"],
input[type="url"],
input[type="password"] {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-base);
  background: white;
}

input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

input::placeholder {
  color: var(--gray-400);
}

.hint {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 0.375rem;
}

/* Password Toggle */
.password-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.password-toggle {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-500);
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-base);
}

.password-toggle:hover {
  color: var(--primary-500);
}

.password-toggle:focus {
  outline: none;
  color: var(--primary-600);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--secondary-500) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.4);
}

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

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 2px solid var(--gray-300);
  width: auto;
  min-width: 100px;
}

.btn-secondary:hover {
  background: var(--gray-200);
  border-color: var(--gray-400);
}

.btn-outline {
  background: transparent;
  color: var(--primary-600);
  border: 2px solid var(--primary-500);
}

.btn-outline:hover {
  background: var(--primary-50);
}

/* Success Card */
.success-card {
  text-align: center;
}

.success-icon,
.error-icon,
.lock-icon {
  margin: 0 auto var(--spacing-lg);
  animation: scaleIn var(--transition-slow) ease-out;
}

.success-icon svg,
.lock-icon svg {
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.success-description {
  font-size: 1rem;
  margin-bottom: var(--spacing-xl);
}

/* Link Display */
.link-display {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border: 2px solid var(--gray-200);
}

.link-display input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.5rem;
  font-size: 0.9rem;
  color: var(--gray-700);
  font-family: 'Monaco', 'Courier New', monospace;
}

.link-display input:focus {
  outline: none;
  box-shadow: none;
}

/* Expiry Info */
.expiry-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background: var(--warning-50);
  border-radius: var(--radius-lg);
  color: var(--warning-700);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
}

/* Error Message */
.error-message {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: rgba(239, 68, 68, 0.1);
  border: 2px solid var(--error-500);
  border-radius: var(--radius-lg);
  color: var(--error-600);
  margin-top: var(--spacing-lg);
  animation: slideIn var(--transition-base) ease-out;
}

/* Loader */
.loader {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(16, 185, 129, 0.1);
  border-top-color: var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: var(--spacing-lg) auto;
}

.loading-text {
  text-align: center;
  color: var(--gray-600);
  font-weight: 500;
}

/* Footer */
.footer {
  text-align: center;
  margin-top: var(--spacing-2xl);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
}

/* Back Link */
.back-link {
  display: inline-block;
  margin-top: var(--spacing-lg);
  color: var(--primary-600);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-base);
}

.back-link:hover {
  color: var(--primary-700);
}

/* Utility Classes */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.section {
  margin-bottom: var(--spacing-lg);
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

/* Responsive Design */
@media (max-width: 640px) {
  .container {
    padding: var(--spacing-sm);
  }

  .card {
    padding: var(--spacing-lg);
  }

  .logo h1 {
    font-size: 1.5rem;
  }

  .card h2 {
    font-size: 1.5rem;
  }

  .link-display {
    flex-direction: column;
  }

  .btn-secondary {
    width: 100%;
  }
}

/* Dark mode support for inputs */
@media (prefers-color-scheme: dark) {

  input[type="text"],
  input[type="url"],
  input[type="password"] {
    background: white;
    color: var(--gray-900);
  }
}