/* ========================================
   AI Management System - Clean Light Theme
   Synapse-Note Inspired Color Variant
   ======================================== */

/* ========== Design System - Clean & Modern ========== */
:root {
  /* Blue-based Color Palette (Synapse-Note style) */
  --primary-color: #3178d7;
  --primary-hover-color: #245ba1;
  --surface-bg: #ffffff;
  --surface-elevated: #f9fafb;
  --surface-border: #e5e7eb;
  --accent-primary: #3178d7;
  --accent-success: #23b26c;
  --accent-warning: #f59e0b;
  --accent-danger: #e23d28;
  --accent-info: #3b82f6;
  
  /* Background & Surface */
  --background-color: #f8f9fa;
  --card-bg: #ffffff;
  --card-border: #e5e7eb;
  --card-shadow: 0 4px 16px rgba(49, 120, 215, 0.08);
  
  /* Text Colors */
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #7b8794;
  --text-inverse: #ffffff;
  
  /* Interactive Effects */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --focus-ring: 0 0 0 3px rgba(49, 120, 215, 0.3);
  
  /* Spacing Scale */
  --unit: 0.5rem;
  --space-1: calc(var(--unit) * 1);
  --space-2: calc(var(--unit) * 2);
  --space-3: calc(var(--unit) * 3);
  --space-4: calc(var(--unit) * 4);
  --space-6: calc(var(--unit) * 6);
  --space-8: calc(var(--unit) * 8);
  
  /* Typography */
  --font-display: 'Inter', 'Noto Sans JP', sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--background-color);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -30px) rotate(120deg); }
  66% { transform: translate(-20px, 20px) rotate(240deg); }
}

/* ========== Typography - Unique Style ========== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
}

h1 {
  font-size: 3rem;
  color: var(--text-primary);
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  color: var(--text-primary);
  font-weight: 600;
}

h3 {
  font-size: 1.5rem;
  color: var(--text-primary);
  font-weight: 600;
}

h4 {
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 500;
}

p {
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
}

/* ========== Glassmorphic Container ========== */
.container {
  position: relative;
  max-width: 1200px;
  margin: var(--space-6) auto;
  padding: 0 var(--space-6);
  z-index: 1;
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-3);
  }
}

/* ========== 認証フォーム (SynapseNote Style) ========== */
#auth-container {
  max-width: 700px;
  margin: 3rem auto;
  background: var(--surface-bg);
  padding: 3rem;
  border-radius: 20px;
  border: 1px solid var(--surface-border);
  box-shadow: 0 12px 32px rgba(49, 120, 215, 0.12);
  position: relative;
}

#auth-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-info));
  border-radius: 20px 20px 0 0;
}

.login-form {
  max-width: 100%;
  margin: 0 auto;
  background: transparent;
}

.login-form h2 {
  margin-bottom: 0.5rem;
  font-size: 1.75rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-primary);
  margin-top: 0;
  background: none;
  -webkit-text-fill-color: var(--text-primary);
}

.login-form h3 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  text-align: center;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.25rem;
  background: none;
  -webkit-text-fill-color: var(--text-primary);
}

.login-form p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

.login-options {
  display: block;
}

.login-switch {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--surface-border);
}

.login-switch p {
  margin: 0.5rem 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.login-switch a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
}

.login-switch a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-info));
  transition: width 0.3s ease;
}

.login-switch a:hover::after {
  width: 100%;
}

.login-switch a:hover {
  color: var(--primary-hover-color);
  text-decoration: none;
}

@media (max-width: 768px) {
  #auth-container {
    margin: 1.5rem auto;
    padding: 2rem;
  }
}

/* Verification Info Styling */
.verification-info {
  background: var(--surface-elevated);
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  border-left: 4px solid var(--primary-color);
}

.verification-info p {
  margin: 0.75rem 0;
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.verification-info strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ========== Clean Form Elements ========== */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="time"],
textarea,
select {
  width: 100%;
  padding: var(--space-3);
  background: var(--surface-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  background: var(--surface-bg);
  border-color: var(--primary-color);
  box-shadow: var(--focus-ring);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  font-style: italic;
}

.form-group {
  margin-bottom: var(--space-4);
  position: relative;
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.form-group small {
  display: block;
  margin-top: var(--space-2);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-style: italic;
}

/* ========== Clean Buttons ========== */
button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 1px solid var(--primary-color);
  background: var(--primary-color);
  color: var(--text-inverse);
  font-size: 1rem;
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
}

button:hover {
  background: var(--primary-hover-color);
  border-color: var(--primary-hover-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

button > * {
  position: relative;
  z-index: 1;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--surface-border);
  border-color: var(--surface-border);
  color: var(--text-muted);
}

button:disabled:hover {
  transform: none;
  box-shadow: none;
}

/* Primary Button Variant */
.save-btn,
#login-btn,
#register-btn,
button[type="submit"] {
  background: var(--primary-color);
  color: var(--text-inverse);
  border-color: var(--primary-color);
}

.save-btn:hover,
#login-btn:hover,
#register-btn:hover,
button[type="submit"]:hover {
  background: var(--primary-hover-color);
  border-color: var(--primary-hover-color);
}

/* Secondary Button */
.secondary-btn {
  border-color: var(--surface-border);
  color: var(--text-primary);
  background: var(--surface-bg);
}

.secondary-btn:hover {
  background: var(--surface-elevated);
  box-shadow: var(--shadow-sm);
}

/* Danger Button */
.delete-btn {
  border-color: var(--accent-danger);
  color: var(--text-inverse);
  background: var(--accent-danger);
}

.delete-btn:hover {
  background: var(--danger-hover-color);
  border-color: var(--danger-hover-color);
  box-shadow: var(--shadow-md);
}

/* ========== Clean Cards ========== */
.ai-card,
.profile-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--card-shadow);
}

.ai-card:hover,
.profile-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.ai-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--card-border);
}

.ai-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ai-card-id {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'Courier New', monospace;
  background: rgba(0, 255, 245, 0.1);
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--primary-color);
}

/* ========== Holographic Modal ========== */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 14, 39, 0.95);
  
  animation: modalFadeIn 0.3s ease;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--surface-bg);
  border: 1px solid var(--primary-color);
  padding: var(--space-6);
  max-width: 700px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
  animation: modalSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.modal-content h2 {
  margin-bottom: var(--space-4);
}

.close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-size: 2rem;
  font-weight: 300;
  color: var(--primary-color);
  cursor: pointer;
  transition: all 0.3s ease;
  background: none;
  border: none;
  padding: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.close:hover {
  color: var(--accent-danger);
  transform: rotate(90deg);
  
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideIn {
  from { 
    transform: translateY(50px);
    opacity: 0;
  }
  to { 
    transform: translateY(0);
    opacity: 1;
  }
}

/* ========== Auth Forms - Split Design ========== */
.auth-header {
  text-align: left;
  margin-bottom: var(--space-6);
}

.auth-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-2);
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.login-options {
  margin-top: var(--space-4);
}

.login-actions {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--card-border);
}

.switch-form-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-align: center;
  display: block;
}

.switch-form-link a,
#forgot-password-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
}

.switch-form-link a::after,
#forgot-password-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

.switch-form-link a:hover::after,
#forgot-password-link:hover::after {
  width: 100%;
}

.switch-form-link a:hover,
#forgot-password-link:hover {
  color: var(--primary-color);
  
}

/* ========== Dashboard - Angular Design ========== */
.user-info {
  background: linear-gradient(135deg, var(--surface-bg), var(--surface-elevated));
  color: var(--text-primary);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  border: 1px solid var(--primary-color);
  border-left: 4px solid var(--primary-color);
  position: relative;
  overflow: hidden;
}

.user-info::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 255, 245, 0.1) 0%, transparent 70%);
  animation: rotate 10s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.user-profile {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  position: relative;
  z-index: 1;
}

.user-profile img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--primary-color);
  box-shadow: var(--shadow-md);
}

.user-welcome {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--primary-color);
  font-family: var(--font-display);
  text-transform: uppercase;
}

.user-status {
  font-size: 1rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ========== Vertical Navigation Menu ========== */
#dashboard-nav {
  background: var(--card-bg);
  
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: var(--space-4);
  margin-bottom: var(--space-6);
}

.nav-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--card-border);
}

.nav-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#dashboard-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

#dashboard-nav li {
  margin: 0;
}

#dashboard-nav a,
#dashboard-nav .nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 8px;
  position: relative;
  font-size: 0.95rem;
}

#dashboard-nav a::before,
#dashboard-nav .nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--primary-color);
  transition: height 0.3s ease;
  border-radius: 0 2px 2px 0;
}

#dashboard-nav a:hover,
#dashboard-nav .nav-link:hover {
  color: var(--primary-color);
  background: rgba(74, 158, 255, 0.08);
}

#dashboard-nav a:hover::before,
#dashboard-nav .nav-link:hover::before {
  height: 60%;
}

#dashboard-nav a.active,
#dashboard-nav .nav-link.active {
  color: var(--primary-color);
  background: rgba(74, 158, 255, 0.15);
  font-weight: 600;
}

#dashboard-nav a.active::before,
#dashboard-nav .nav-link.active::before {
  height: 70%;
}

#dashboard-nav .fas {
  width: 20px;
  text-align: center;
  margin-right: var(--space-3);
  font-size: 1.1rem;
}

#dashboard-nav button {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  position: relative;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

#dashboard-nav button::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

#dashboard-nav button:hover {
  color: var(--primary-color);
  background: rgba(74, 158, 255, 0.05);
}

#dashboard-nav button:hover::before {
  width: 100%;
}

#dashboard-nav button.active {
  color: var(--primary-color);
  background: rgba(74, 158, 255, 0.1);
}

#dashboard-nav button.active::before {
  width: 100%;
}

.dashboard-panel {
  display: none;
  animation: panelSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dashboard-panel.active {
  display: block;
}

@keyframes panelSlideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ========== Neon Toast System ========== */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  background: var(--surface-bg);
  border: 1px solid var(--primary-color);
  padding: var(--space-3);
  min-width: 320px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transform: translateX(400px);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-color);
}

.toast.show {
  transform: translateX(0);
}

.toast.success {
  border-color: var(--accent-warning);
}

.toast.success::before {
  background: var(--accent-warning);
}

.toast.error {
  border-color: var(--accent-danger);
}

.toast.error::before {
  background: var(--accent-danger);
}

.toast.warning {
  border-color: var(--accent-warning);
}

.toast.warning::before {
  background: var(--accent-warning);
}

.toast.info {
  border-color: var(--primary-color);
}

.toast-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.toast.success .toast-icon {
  color: var(--accent-warning);
  
}

.toast.error .toast-icon {
  color: var(--accent-danger);
  
}

.toast.warning .toast-icon {
  color: var(--accent-warning);
  
}

.toast.info .toast-icon {
  color: var(--primary-color);
  
}

.toast-message {
  flex: 1;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.875rem;
}

.toast-close {
  background: none;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--space-1);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.toast-close:hover {
  color: var(--accent-danger);
  border-color: var(--accent-danger);
  background: rgba(255, 51, 102, 0.1);
}

/* ========== Neon Toggle Switch ========== */
.toggle-container {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--card-border);
  transition: 0.4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background: var(--text-muted);
  transition: 0.4s;
}

input:checked + .slider {
  background: rgba(0, 255, 245, 0.2);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

input:checked + .slider:before {
  background: var(--primary-color);
  transform: translateX(30px);
  box-shadow: 0 0 10px var(--primary-color);
}

/* ========== Angular Grid Layout ========== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

@media (max-width: 768px) {
  .ai-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== Neon Checkbox ========== */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

input[type="checkbox"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--card-border);
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
}

input[type="checkbox"]:checked {
  background: var(--primary-color);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--background-color);
  font-weight: bold;
  font-size: 14px;
}

/* ========== Angular Form Sections ========== */
.form-section {
  margin: var(--space-6) 0;
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.02);
  border-left: 3px solid var(--primary-color);
  position: relative;
}

.form-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 245, 0.05));
  pointer-events: none;
}

.form-section h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
  color: var(--primary-color);
}

.form-section .section-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
  font-style: italic;
}

/* ========== Cyber Empty State ========== */
.empty-state {
  text-align: center;
  padding: var(--space-8);
  color: var(--text-muted);
}

.empty-state i {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  color: var(--primary-color);
  opacity: 0.3;
  
}

.empty-state h3 {
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

/* ========== Animations ========== */
@keyframes scanline {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}

/* Scanline effect */
.scanline {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  opacity: 0.5;
  animation: scanline 4s linear infinite;
  pointer-events: none;
  z-index: 9999;
}

/* ========== Utilities ========== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }

.hidden {
  display: none !important;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-3);
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .auth-content {
    padding: var(--space-4);
  }
  
  .user-profile {
    flex-direction: column;
    text-align: center;
  }
  
  .toast {
    min-width: 280px;
  }
  
  .toast-container {
    left: var(--space-2);
    right: var(--space-2);
  }
}

/* ========== Accessibility ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========== Icon Styling ========== */
.fas, .far, .fab {
  font-size: inherit;
  vertical-align: middle;
}

button .fas,
button .far,
button .fab {
  font-size: 1em;
}

.avatar-placeholder {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--surface-elevated);
  border: 3px solid var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 2rem;
  box-shadow: var(--shadow-md);
}

.avatar-placeholder .fas {
  color: var(--primary-color);
}

/* ========== Button Groups ========== */
.button-group {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

.ai-card-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

.ai-card-actions button {
  flex: 1;
  min-width: 120px;
  font-size: 0.875rem;
  padding: var(--space-2) var(--space-3);
}

/* ========== Invitation Code Styling ========== */
.invite-code-result {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--card-border);
}

.invite-code-box {
  background: rgba(0, 255, 245, 0.05);
  padding: var(--space-4);
  border: 1px solid var(--primary-color);
  position: relative;
}

.invite-code-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.code-input-group {
  display: flex;
  gap: var(--space-3);
  margin: var(--space-3) 0;
}

.code-input-group input {
  flex: 1;
  font-family: 'Courier New', monospace;
  font-weight: 700;
  letter-spacing: 3px;
  text-align: center;
  background: rgba(0, 255, 245, 0.1);
  font-size: 1.125rem;
  border-color: var(--primary-color);
}

/* ========== Admin & Role Management ========== */
.admin-management {
  background: rgba(255, 0, 255, 0.03);
  padding: var(--space-6);
  border: 1px solid var(--primary-color);
  border-left: 4px solid var(--primary-color);
}

.user-list-item {
  background: var(--card-bg);
  
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--card-border);
  transition: all 0.3s ease;
}

.user-list-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: translateX(5px);
}

/* ========== Profile Overview ========== */
.profile-overview {
  margin-bottom: var(--space-6);
}

.profile-summary {
  padding: var(--space-4);
}

.profile-summary h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
  color: var(--primary-color);
}

.profile-summary p {
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.discord-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.discord-info {
  background: rgba(255, 234, 0, 0.03);
  padding: var(--space-4);
  border-left: 3px solid var(--accent-warning);
}

.discord-info p {
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.discord-info strong {
  color: var(--accent-warning);
  font-weight: 600;
}

/* ========== Loading Spinner ========== */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(74, 158, 255, 0.2);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 0.8s linear infinite;
}

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

/* ========== Loader Container ========== */
.loader-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--background-color);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  gap: var(--space-4);
}

.loader-container .spinner {
  width: 60px;
  height: 60px;
  border-width: 4px;
  border-color: rgba(74, 158, 255, 0.2);
  border-top-color: var(--primary-color);
}

.loader-text {
  font-size: 1.125rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.05em;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

/* ========== Status Indicators ========== */
.status-active {
  color: var(--accent-success);
  font-weight: 600;
}

.status-inactive {
  color: var(--text-secondary);
  font-weight: 500;
}

.status-maintenance {
  color: var(--accent-warning);
  font-weight: 600;
}

.status-error {
  color: var(--accent-danger);
  font-weight: 600;
}

/* ========== AI Details ========== */
.ai-details {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--card-border);
}

.ai-details p {
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.ai-details strong {
  color: var(--primary-color);
  font-weight: 600;
}

/* ========== Nickname Management ========== */
.nickname-item {
  background: rgba(255, 0, 255, 0.05);
  padding: var(--space-3);
  margin-bottom: var(--space-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--primary-color);
}

.nickname-item .nickname-info {
  flex: 1;
}

.nickname-item .nickname-discord-id {
  font-family: 'Courier New', monospace;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.nickname-item .nickname-name {
  color: var(--primary-color);
  font-weight: 600;
  margin-left: var(--space-3);
}

/* ========== Tab Navigation ========== */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--card-border);
  margin-bottom: var(--space-6);
}

.tab-nav button {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.875rem;
}

.tab-nav button:hover {
  color: var(--primary-color);
}

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

/* ========== Status Badges ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid;
}

.badge-owner {
  background: rgba(0, 255, 245, 0.1);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.badge-editor {
  background: rgba(255, 234, 0, 0.1);
  color: var(--accent-warning);
  border-color: var(--accent-warning);
}

.badge-viewer {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border-color: var(--card-border);
}

/* ========== Alert Messages ========== */
.alert {
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  border-left: 4px solid;
  border-radius: var(--radius-md);
  background: var(--surface-bg);
}

.alert-info {
  background: rgba(107, 114, 128, 0.1);
  border-left-color: var(--accent-info);
  color: var(--text-secondary);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-left-color: var(--accent-warning);
  color: #d97706;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-left-color: var(--accent-danger);
  color: var(--accent-danger);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-left-color: var(--accent-success);
  color: var(--accent-success);
}