/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css');

:root {
  /* Light Theme */
  --bg-color: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
  --input-bg: rgba(255, 255, 255, 0.9);
  --input-border: #e2e8f0;
  --danger: #ef4444;
  --success: #10b981;
}

[data-theme="dark"] {
  --bg-color: #0f172a;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  --input-bg: rgba(15, 23, 42, 0.8);
  --input-border: #334155;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* Gradient Background */
.background-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background: radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
              radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.15), transparent 25%);
}

/* Glassmorphism Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--card-shadow);
  border-radius: 1.5rem;
  padding: 2.5rem;
  width: 100%;
  max-width: 440px;
  margin: 2rem auto;
}

/* Form Elements */
.input-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.input-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
  outline: none;
}

.input-group input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Password Toggle */
.toggle-password {
  position: absolute;
  right: 1rem;
  top: 2.3rem;
  cursor: pointer;
  color: var(--text-secondary);
  background: none;
  border: none;
  font-size: 1rem;
  padding: 0.2rem;
}

/* Buttons */
.btn {
  width: 100%;
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}


.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Delete button - premium style */
.btn-delete {
  background: rgba(239,68,68,0.15);
  color: #e53935;
  border: none;
  border-radius: 0.75rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: background 0.3s ease, transform 0.2s ease;
}
.btn-delete:hover {
  background: rgba(239,68,68,0.25);
  transform: translateY(-1px);
}

.btn-google {
  background: var(--input-bg);
  color: var(--text-primary);
  border: 1px solid var(--input-border);
  margin-top: 1rem;
}

.btn-google:hover {
  background: var(--bg-color);
  transform: translateY(-1px);
}

.btn-google img {
  width: 20px;
  height: 20px;
}

/* Loading Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
  display: none;
}
.btn.loading .spinner {
  display: inline-block;
}
.btn.loading .btn-text {
  display: none;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Auth Layout */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1rem;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Links & Utilities */
.link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.link:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--input-border);
}
.divider:not(:empty)::before { margin-right: .5em; }
.divider:not(:empty)::after { margin-left: .5em; }

/* Checkbox */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.checkbox-group input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--primary-color);
  cursor: pointer;
}

/* Toast Notification */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.toast {
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transform: translateX(120%);
  transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.toast.show {
  transform: translateX(0);
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary-color); }

/* Navigation */
.navbar {
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Dark Mode Toggle */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover {
  background: var(--input-bg);
}

/* Hero Section */
.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 4rem 1rem;
}
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2rem;
}

/* Profile Dropdown */
.profile-menu {
  position: relative;
}
.profile-btn {
  background: none;
  border: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  color: var(--text-primary);
  font-weight: 500;
}
.profile-btn img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-color);
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 0.75rem;
  box-shadow: var(--card-shadow);
  padding: 0.5rem;
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s;
}
.dropdown-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 0.5rem;
  transition: background 0.2s;
  width: 100%;
  text-align: left;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.875rem;
}
.dropdown-item:hover {
  background: var(--input-bg);
}
.dropdown-item.danger {
  color: var(--danger);
}
.dropdown-item.danger:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }
}