/**
 * Auth Styles for AutoNateAI Learning Hub
 * Beautiful, animated login/register pages
 */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-card: #16162a;
  
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a80;
  
  --accent-primary: #7986cb;
  --accent-secondary: #4db6ac;
  --accent-warning: #ffd54f;
  --accent-error: #ef5350;
  --accent-success: #66bb6a;
  --accent-google: #4285F4;
  
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== Auth Page Layout ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
  position: relative;
}

/* Animated background */
.auth-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-gradient {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.5;
}

.bg-gradient-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(121, 134, 203, 0.3) 0%, transparent 70%);
  top: -200px;
  left: -200px;
  animation: float1 20s ease-in-out infinite;
}

.bg-gradient-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(77, 182, 172, 0.25) 0%, transparent 70%);
  bottom: -150px;
  right: -150px;
  animation: float2 25s ease-in-out infinite;
}

.bg-gradient-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 213, 79, 0.15) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: float3 30s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(50px, 30px) rotate(5deg); }
  66% { transform: translate(-30px, 50px) rotate(-5deg); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(-40px, -30px) rotate(-5deg); }
  66% { transform: translate(30px, -40px) rotate(5deg); }
}

@keyframes float3 {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.2); }
}

/* Floating particles */
.particles {
  position: absolute;
  width: 100%;
  height: 100%;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: particleFloat 15s linear infinite;
}

.particle:nth-child(2n) { background: var(--accent-secondary); animation-duration: 20s; }
.particle:nth-child(3n) { background: var(--accent-warning); animation-duration: 25s; }

@keyframes particleFloat {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 0.5; }
  90% { opacity: 0.5; }
  100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
}

/* ===== Auth Container ===== */
.auth-container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--space-xl);
}

.auth-card {
  background: rgba(22, 22, 42, 0.9);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  width: 100%;
  max-width: 440px;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
  animation: cardAppear 0.6s ease-out;
}

@keyframes cardAppear {
  0% {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ===== Logo & Header ===== */
.auth-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(121, 134, 203, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(121, 134, 203, 0); }
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.auth-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ===== Form Styles ===== */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-body);
  transition: all var(--transition-normal);
  outline: none;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(121, 134, 203, 0.2);
}

.form-input.error {
  border-color: var(--accent-error);
  box-shadow: 0 0 0 3px rgba(239, 83, 80, 0.2);
}

/* Password visibility toggle */
.password-wrapper {
  position: relative;
}

.password-wrapper .form-input {
  padding-right: 3rem;
}

.password-toggle {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

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

/* Error message */
.form-error {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: rgba(239, 83, 80, 0.1);
  border: 1px solid rgba(239, 83, 80, 0.3);
  border-radius: var(--radius-md);
  color: var(--accent-error);
  font-size: 0.875rem;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.form-error.hidden {
  display: none;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(121, 134, 203, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-google {
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn-google:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-google);
}

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

/* Loading state */
.btn.loading {
  pointer-events: none;
  position: relative;
  color: transparent;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.btn-primary.loading::after {
  border-top-color: white;
}

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

/* ===== Divider ===== */
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

/* ===== Links ===== */
.auth-links {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.auth-links a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.auth-links a:hover {
  color: var(--accent-secondary);
}

.forgot-password {
  display: block;
  text-align: right;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-top: calc(var(--space-sm) * -1);
  transition: color var(--transition-fast);
}

.forgot-password:hover {
  color: var(--accent-primary);
}

/* ===== Password Strength ===== */
.password-strength {
  display: flex;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.strength-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  transition: background var(--transition-normal);
}

.strength-bar.active.weak { background: var(--accent-error); }
.strength-bar.active.medium { background: var(--accent-warning); }
.strength-bar.active.strong { background: var(--accent-success); }

.strength-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.strength-text.weak { color: var(--accent-error); }
.strength-text.medium { color: var(--accent-warning); }
.strength-text.strong { color: var(--accent-success); }

/* ===== Success Message ===== */
.success-message {
  text-align: center;
  padding: var(--space-xl);
  animation: cardAppear 0.6s ease-out;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--accent-success), var(--accent-secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 2.5rem;
  animation: successPop 0.5s ease-out;
}

@keyframes successPop {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.success-message h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.success-message p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

/* ===== Top Navigation Bar ===== */
.auth-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.auth-navbar .nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

.auth-navbar .nav-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.auth-navbar .nav-links {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.auth-navbar .nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.auth-navbar .nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.auth-navbar .nav-link.active {
  color: var(--accent-primary);
}

.auth-navbar .nav-btn {
  padding: var(--space-sm) var(--space-lg);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
}

.auth-navbar .nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(121, 134, 203, 0.4);
}

/* Adjust page content when navbar is present */
.auth-page.has-navbar {
  padding-top: 70px;
}

/* ===== Responsive ===== */

/* Wider card on larger screens */
@media (min-width: 640px) {
  .auth-card {
    max-width: 500px;
  }
}

@media (min-width: 768px) {
  .auth-card {
    max-width: 540px;
  }
  
  .auth-form {
    gap: var(--space-md);
  }
}

@media (min-width: 1024px) {
  .auth-card {
    max-width: 560px;
    padding: var(--space-2xl) 3rem;
  }
}

@media (max-width: 480px) {
  .auth-card {
    padding: var(--space-xl);
    margin: var(--space-md);
  }
  
  .auth-title {
    font-size: 1.5rem;
  }
  
  .btn {
    padding: 0.75rem 1.25rem;
  }
  
  .auth-navbar {
    padding: var(--space-sm) var(--space-md);
  }
  
  .auth-navbar .nav-logo-text {
    display: none;
  }
}

/* ===== Three Forces Animation ===== */
.three-forces-mini {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  opacity: 0.7;
}

.force-mini {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.force-mini-icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
  animation: forceFloat 3s ease-in-out infinite;
}

.force-mini:nth-child(2) .force-mini-icon {
  animation-delay: 1s;
}

.force-mini:nth-child(3) .force-mini-icon {
  animation-delay: 2s;
}

@keyframes forceFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}