:root {
  /* Colors */
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --bg-gradient-1: #ee7752;
  --bg-gradient-2: #e73c7e;
  --bg-gradient-3: #23a6d5;
  --bg-gradient-4: #23d5ab;
  
  /* Glassmorphism Light */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-shadow: rgba(31, 38, 135, 0.15);
  
  /* Text */
  --text-main: #1f2937;
  --text-muted: #6b7280;
  
  /* Inputs */
  --input-bg: rgba(255, 255, 255, 0.8);
  --input-border: rgba(209, 213, 219, 0.5);
  --input-focus: rgba(79, 70, 229, 0.5);
  
  /* Utilities */
  --border-radius-lg: 24px;
  --border-radius-md: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --primary-color: #6366f1;
  --primary-hover: #818cf8;
  
  /* Dark animated gradient */
  --bg-gradient-1: #0f2027;
  --bg-gradient-2: #203a43;
  --bg-gradient-3: #2c5364;
  --bg-gradient-4: #15222b;
  
  /* Glassmorphism Dark */
  --glass-bg: rgba(17, 24, 39, 0.75);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: rgba(0, 0, 0, 0.4);
  
  /* Text */
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  
  /* Inputs */
  --input-bg: rgba(55, 65, 81, 0.85);
  --input-border: rgba(107, 114, 128, 0.5);
  --input-focus: rgba(99, 102, 241, 0.5);
}

@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(-45deg, var(--bg-gradient-1), var(--bg-gradient-2), var(--bg-gradient-3), var(--bg-gradient-4));
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
  color: var(--text-main);
  transition: var(--transition);
}

/* Glass Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 8px 32px 0 var(--glass-shadow);
  padding: 2.5rem;
  width: 100%;
  max-width: 500px;
  transition: var(--transition);
}

/* Header */
.card-header {
  text-align: center;
  margin-bottom: 2rem;
}

.header-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-color), #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

h4 {
  font-weight: 700;
  margin: 0;
  color: var(--text-main);
  letter-spacing: -0.025em;
}

/* Note Banner */
.info-banner {
  background: rgba(107, 114, 128, 0.1);
  border-left: 4px solid var(--primary-color);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.info-banner ul {
  padding-left: 1.2rem;
  margin-top: 0.5rem;
  margin-bottom: 0;
}
.info-banner li {
  margin-bottom: 0.25rem;
}

/* Form Controls */
.form-label {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  display: block;
}

.form-control, .form-select {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-md);
  color: var(--text-main);
  padding: 0.75rem 1rem;
  width: 100%;
  margin-bottom: 0.25rem;
  box-sizing: border-box;
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

/* Fix for dark mode - ensure select option text visible */
.form-select option {
  background: #1f2937;
  color: #f3f4f6;
}

[data-theme="light"] .form-select option {
  background: #ffffff;
  color: #1f2937;
}

.form-control::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.form-control:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px var(--input-focus);
  background: var(--glass-bg);
}

/* Dark mode: force light text on inputs - override Bootstrap */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background-color: rgba(55, 65, 81, 0.9) !important;
  color: #f3f4f6 !important;
  border-color: rgba(107, 114, 128, 0.6) !important;
}

[data-theme="dark"] .form-control::placeholder {
  color: #9ca3af !important;
  opacity: 1 !important;
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
  background-color: rgba(55, 65, 81, 0.95) !important;
  color: #f9fafb !important;
  border-color: #6366f1 !important;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.35) !important;
}

[data-theme="dark"] .form-select option {
  background-color: #374151;
  color: #f3f4f6;
}

.form-group {
  margin-bottom: 1.5rem;
  position: relative;
}

/* Error messages */
.error-message {
  color: #ef4444;
  font-size: 0.8rem;
  margin-top: 0.25rem;
  display: none;
  animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Buttons */
.btn-group {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  flex: 1;
  border: none;
  border-radius: var(--border-radius-md);
  padding: 0.875rem 1.5rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.39);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.23);
}

.btn-secondary {
  background: rgba(107, 114, 128, 0.1);
  color: var(--text-main);
  border: 1px solid var(--input-border);
}

.btn-secondary:hover {
  background: rgba(107, 114, 128, 0.2);
  transform: translateY(-2px);
}

/* Spinner */
.spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
  display: none;
}

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

/* Modal Customization */
.modal-content.glass-modal {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  border-radius: var(--border-radius-lg);
}

.modal-header {
  border-bottom: 1px solid var(--input-border);
}

.modal-title {
  font-weight: 700;
}

.btn-close {
  filter: var(--close-btn-filter, none);
}

[data-theme="dark"] .btn-close {
  --close-btn-filter: invert(1) grayscale(100%) brightness(200%);
}

.modal-footer {
  border-top: 1px solid var(--input-border);
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-main);
  font-size: 1.2rem;
  box-shadow: 0 4px 12px var(--glass-shadow);
  transition: var(--transition);
  z-index: 100;
}

.theme-toggle:hover {
  transform: rotate(15deg) scale(1.1);
}

.theme-toggle .fa-sun { display: none; }
.theme-toggle .fa-moon { display: block; }

[data-theme="dark"] .theme-toggle .fa-sun { display: block; }
[data-theme="dark"] .theme-toggle .fa-moon { display: none; }

/* Mobile optimization */
@media (max-width: 576px) {
  .glass-card {
    border-radius: 0;
    min-height: 100vh;
    padding: 2rem 1.5rem;
  }
  body {
    align-items: flex-start;
  }
}

/* Inline Counter */
.counter-inline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  color: var(--text-main);
  font-size: 0.85rem;
  transition: var(--transition);
  cursor: default;
}

.counter-inline:hover {
  background: var(--glass-border);
}

.counter-inline i {
  color: var(--primary-color);
  font-size: 0.95rem;
}