/* CSS Variables for design system */
:root {
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --hover-gradient: linear-gradient(135deg, #4f46e5 0%, #9333ea 100%);
  --bg-gradient: linear-gradient(135deg, #f3f4f6 0%, #e0e7ff 50%, #fae8ff 100%);
  
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --bg-card: rgba(255, 255, 255, 0.75);
  --border-card: rgba(255, 255, 255, 0.6);
  --shadow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.05), 0 0 0 1px rgba(0, 0, 0, 0.02);
  --shadow-button: 0 10px 20px -5px rgba(99, 102, 241, 0.4);
  
  --font-family: 'Outfit', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --danger-color: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --danger-border: rgba(239, 68, 68, 0.2);
}

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

body {
  font-family: var(--font-family);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
  background: var(--bg-gradient);
  position: relative;
}

/* Subtle background animated glass effect */
.glass-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  background-image: 
    radial-gradient(at 10% 20%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(at 90% 10%, rgba(168, 85, 247, 0.15) 0px, transparent 50%),
    radial-gradient(at 50% 80%, rgba(236, 72, 153, 0.1) 0px, transparent 50%);
  filter: blur(80px);
}

.app-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 500px;
  padding: 24px;
}

/* Glassmorphism Card */
.welcome-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-card);
  border-radius: 28px;
  padding: 48px 40px;
  box-shadow: var(--shadow-card);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
  animation: cardFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
  transform: translateY(20px);
}

.welcome-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.01);
}

/* Logo & Header */
.logo-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 24px;
}

.logo-icon {
  font-size: 36px;
  width: 72px;
  height: 72px;
  background: white;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
  margin-bottom: 16px;
  animation: float 4s ease-in-out infinite;
}

.brand-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 32px;
}

/* Form Styles */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  padding-left: 4px;
}

.form-group input {
  font-family: var(--font-family);
  font-size: 15px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.6);
  outline: none;
  transition: all 0.2s ease;
  color: var(--text-main);
}

.form-group input:focus {
  border-color: #6366f1;
  background: white;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Error messages */
.error-container {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  border-radius: 12px;
  color: var(--danger-color);
  font-size: 14px;
  font-weight: 500;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Buttons */
.action-area {
  display: flex;
  justify-content: center;
  margin-top: 8px;
}

.btn {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 600;
  padding: 16px 32px;
  border-radius: 16px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  width: 100%;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -10px rgba(99, 102, 241, 0.5);
  background: var(--hover-gradient);
}

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

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background: rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}

.btn-arrow {
  transition: transform 0.2s ease;
}

.btn-primary:hover .btn-arrow {
  transform: translateX(4px);
}

/* Loading state / redirector */
.loading-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(99, 102, 241, 0.1);
  border-top-color: #6366f1;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

.loading-text {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 500;
}

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

/* Dashboard Styles */
.welcome-message {
  text-align: center;
  margin-bottom: 24px;
}

.greeting {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

/* AI Omikuji Section Styles */
.omikuji-section {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 20px;
  padding: 24px 20px;
  margin-bottom: 28px;
  text-align: center;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.section-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
}

.omikuji-box {
  background: white;
  border: 1px dashed #a855f7;
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 20px;
  box-shadow: 0 4px 15px rgba(168, 85, 247, 0.05);
  animation: pulseBox 2s infinite ease-in-out;
}

.omikuji-result-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-main);
  text-align: left;
  white-space: pre-wrap; /* 改行をそのまま表示 */
}

@keyframes pulseBox {
  0%, 100% { border-color: #a855f7; }
  50% { border-color: #6366f1; }
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 36px;
}

.stat-item {
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 20px 16px;
  border-radius: 18px;
  text-align: center;
}

.stat-title {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 20px;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Animations */
@keyframes cardFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

/* Responsive adjustments */
@media (max-width: 480px) {
  .welcome-card {
    padding: 36px 24px;
  }
  .brand-title {
    font-size: 28px;
  }
}