/* WBGT通知サービス v2 - モノトーンベースのモダンスタイル */

/* ===== CSS Variables ===== */
:root {
  /* Colors - Monochrome Base */
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;
  --color-black: #000000;
  
  /* Accent Colors */
  --color-primary: #000000;
  --color-primary-hover: #262626;
  --color-secondary: #737373;
  --color-secondary-hover: #525252;
  
  /* Status Colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* WBGT Level Colors */
  --color-caution: #22c55e;
  --color-alert: #f59e0b;
  --color-strict-alert: #f97316;
  --color-danger: #ef4444;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-modal: 1050;
  --z-toast: 1100;
  --z-loading: 1200;
}

/* ===== Dark Mode Support ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-white: #000000;
    --color-gray-50: #171717;
    --color-gray-100: #262626;
    --color-gray-200: #404040;
    --color-gray-300: #525252;
    --color-gray-400: #737373;
    --color-gray-500: #a3a3a3;
    --color-gray-600: #d4d4d4;
    --color-gray-700: #e5e5e5;
    --color-gray-800: #f5f5f5;
    --color-gray-900: #fafafa;
    --color-black: #ffffff;
    
    --color-primary: #ffffff;
    --color-primary-hover: #f5f5f5;
    --color-secondary: #a3a3a3;
    --color-secondary-hover: #d4d4d4;
  }
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-4);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-4);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
}

/* ===== Layout ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-6);
  }
}

/* ===== Loading Overlay ===== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loading);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-gray-200);
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-4);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===== Header ===== */
.header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-primary);
}

.logo i {
  width: 24px;
  height: 24px;
}

.nav {
  display: none;
  gap: var(--spacing-8);
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }
}

.nav-link {
  font-weight: 500;
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.user-menu {
  position: relative;
}

.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.user-menu-trigger:hover {
  border-color: var(--color-gray-300);
}

.user-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-2);
  min-width: 200px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.user-menu.active .user-menu-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-menu-dropdown a {
  display: block;
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--color-gray-700);
  transition: background-color var(--transition-fast);
}

.user-menu-dropdown a:hover {
  background: var(--color-gray-50);
}

.user-menu-dropdown hr {
  border: none;
  border-top: 1px solid var(--color-gray-200);
  margin: var(--spacing-2) 0;
}

.mobile-menu-toggle {
  display: block;
  padding: var(--spacing-2);
  border: none;
  background: none;
  cursor: pointer;
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* ===== Main Content ===== */
.main {
  min-height: calc(100vh - 64px);
}

.page {
  display: none;
  padding: var(--spacing-8) 0;
}

.page.active {
  display: block;
}

.page-header {
  margin-bottom: var(--spacing-8);
  text-align: center;
}

.page-header h1 {
  margin-bottom: var(--spacing-2);
}

.page-header p {
  color: var(--color-gray-600);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
}

/* ===== Hero Section ===== */
.hero {
  padding: var(--spacing-20) 0;
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.hero-content {
  display: grid;
  gap: var(--spacing-12);
  align-items: center;
}

@media (min-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr 1fr;
  }
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--spacing-6);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-gray-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-8);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

/* ===== WBGT Card ===== */
.wbgt-card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-xl);
  max-width: 300px;
  width: 100%;
}

.wbgt-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
}

.wbgt-value {
  text-align: center;
  margin-bottom: var(--spacing-4);
}

.wbgt-value .value {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
}

.wbgt-value .unit {
  font-size: var(--font-size-xl);
  color: var(--color-gray-500);
}

.wbgt-level {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
}

.wbgt-level.caution {
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-caution);
}

.wbgt-level.alert {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-alert);
}

.wbgt-level.strict-alert {
  background: rgba(249, 115, 22, 0.1);
  color: var(--color-strict-alert);
}

.wbgt-level.danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-danger);
}

.wbgt-message {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  text-align: center;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  font-weight: 500;
  font-size: var(--font-size-base);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-white);
}

.btn-secondary {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
  border-color: var(--color-gray-200);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-200);
  border-color: var(--color-gray-300);
  color: var(--color-gray-900);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-full {
  width: 100%;
}

.btn i {
  width: 16px;
  height: 16px;
}

/* ===== Features Section ===== */
.features {
  padding: var(--spacing-20) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.features-grid {
  display: grid;
  gap: var(--spacing-8);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.feature-card {
  text-align: center;
  padding: var(--spacing-6);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--color-gray-100);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--spacing-4);
}

.feature-icon i {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.feature-card h3 {
  margin-bottom: var(--spacing-2);
}

.feature-card p {
  color: var(--color-gray-600);
  margin-bottom: 0;
}

/* ===== Pricing Section ===== */
.pricing {
  padding: var(--spacing-20) 0;
  background: var(--color-gray-50);
}

.pricing-grid {
  display: grid;
  gap: var(--spacing-8);
  max-width: 800px;
  margin: 0 auto;
}

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

.pricing-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-1) var(--spacing-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--spacing-6);
}

.pricing-header h3 {
  margin-bottom: var(--spacing-2);
}

.price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--spacing-1);
}

.price .amount {
  font-size: var(--font-size-4xl);
  font-weight: 700;
}

.price .period {
  color: var(--color-gray-500);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--spacing-8);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-2) 0;
}

.pricing-features i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.pricing-features .lucide-check {
  color: var(--color-success);
}

.pricing-features .lucide-x {
  color: var(--color-gray-400);
}

/* ===== Modal ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  max-width: 400px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-6) var(--spacing-6) 0;
}

.modal-header h2 {
  margin-bottom: 0;
}

.modal-close {
  padding: var(--spacing-2);
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-gray-100);
}

.modal-body {
  padding: var(--spacing-6);
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: var(--spacing-5);
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-2);
  color: var(--color-gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-3);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group small {
  display: block;
  margin-top: var(--spacing-1);
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

.auth-switch {
  text-align: center;
  margin-top: var(--spacing-6);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-gray-200);
}

/* ===== Dashboard ===== */
.dashboard-grid {
  display: grid;
  gap: var(--spacing-8);
}

.stats-grid {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.stat-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.stat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-gray-100);
  border-radius: var(--radius-xl);
}

.stat-icon i {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.current-wbgt,
.recent-notifications {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
}

.current-wbgt h2,
.recent-notifications h2 {
  margin-bottom: var(--spacing-6);
  font-size: var(--font-size-xl);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-content {
  display: grid;
  gap: var(--spacing-8);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-bottom: var(--spacing-8);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-2);
}

.footer-section a {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-white);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-gray-700);
  color: var(--color-gray-500);
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  top: var(--spacing-4);
  right: var(--spacing-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.toast {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  box-shadow: var(--shadow-lg);
  max-width: 400px;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

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

.toast.success {
  border-left: 4px solid var(--color-success);
}

.toast.error {
  border-left: 4px solid var(--color-error);
}

.toast.warning {
  border-left: 4px solid var(--color-warning);
}

.toast.info {
  border-left: 4px solid var(--color-info);
}

/* ===== Responsive Design ===== */
@media (max-width: 767px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .container {
    padding: 0 var(--spacing-4);
  }
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { display: block !important; }

.mt-0 { margin-top: 0 !important; }
.mt-4 { margin-top: var(--spacing-4) !important; }
.mt-8 { margin-top: var(--spacing-8) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-4 { margin-bottom: var(--spacing-4) !important; }
.mb-8 { margin-bottom: var(--spacing-8) !important; }

.p-0 { padding: 0 !important; }
.p-4 { padding: var(--spacing-4) !important; }
.p-8 { padding: var(--spacing-8) !important; }

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease-out;
}

.animate-slide-in {
  animation: slideIn 0.3s ease-out;
}