/* ==========================================================================
   Common Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Primary Colors (Twitter Blue) */
  --color-primary: #1DA1F2;
  --color-primary-hover: #1991DA;
  --color-primary-50: #EBF8FF;
  --color-primary-100: #BEE3F8;
  --color-primary-700: #1991DA;
  --color-primary-800: #1570A6;

  /* Gray Scale */
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;

  /* White */
  --color-white: #FFFFFF;

  /* Status Colors - Green */
  --color-green-50: #F0FDF4;
  --color-green-100: #DCFCE7;
  --color-green-500: #22C55E;
  --color-green-600: #16A34A;
  --color-green-800: #166534;

  /* Status Colors - Blue */
  --color-blue-50: #EBF8FF;
  --color-blue-100: #BEE3F8;
  --color-blue-200: #90CDF4;
  --color-blue-500: #1DA1F2;
  --color-blue-600: #0284C7;
  --color-blue-700: #0369A1;
  --color-blue-800: #1570A6;
  --color-blue-900: #0C4A6E;

  /* Status Colors - Red */
  --color-red-50: #FEF2F2;
  --color-red-100: #FEE2E2;
  --color-red-200: #FECACA;
  --color-red-300: #FCA5A5;
  --color-red-500: #EF4444;
  --color-red-600: #DC2626;
  --color-red-700: #B91C1C;
  --color-red-800: #991B1B;

  /* Status Colors - Yellow */
  --color-yellow-50: #FEFCE8;
  --color-yellow-100: #FEF9C3;
  --color-yellow-200: #FEF08A;
  --color-yellow-500: #EAB308;
  --color-yellow-600: #CA8A04;
  --color-yellow-700: #A16207;
  --color-yellow-800: #854D0E;

  /* Status Colors - Orange */
  --color-orange-50: #FFF7ED;
  --color-orange-100: #FFEDD5;
  --color-orange-200: #FED7AA;
  --color-orange-300: #FDBA74;
  --color-orange-400: #FB923C;
  --color-orange-500: #F97316;
  --color-orange-600: #EA580C;
  --color-orange-700: #C2410C;
  --color-orange-800: #9A3412;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --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);

  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;
}

/* --------------------------------------------------------------------------
   Base Typography (Mobile First)
   -------------------------------------------------------------------------- */
html {
  /* Base font size for mobile (16px = 1rem) */
  font-size: 16px;
}

body {
  /* System font stack for Japanese */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
               "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-gray-900);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Adjust font size for larger screens if needed */
@media (min-width: 768px) {
  html {
    font-size: 16px; /* Keep 16px or adjust to 18px if preferred */
  }
}

/* --------------------------------------------------------------------------
   Body Layout
   -------------------------------------------------------------------------- */
.body-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main-content {
  flex: 1;
}

/* --------------------------------------------------------------------------
   Status Badge (Shared Component)
   -------------------------------------------------------------------------- */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Common Button Styles
   -------------------------------------------------------------------------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: none;
  background-color: var(--color-primary);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background-color var(--transition-normal);
  text-decoration: none;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-white);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Common Badge Styles
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  background-color: var(--color-gray-100);
  color: var(--color-gray-800);
}

/* --------------------------------------------------------------------------
   Icon Styles
   -------------------------------------------------------------------------- */
.icon {
  width: 1rem;
  height: 1rem;
  color: var(--color-gray-400);
}

/* --------------------------------------------------------------------------
   Flash Messages (Shared Component)
   -------------------------------------------------------------------------- */
.flash-notice {
  background-color: var(--color-green-50);
  border: 1px solid var(--color-green-100);
  color: var(--color-green-800);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin: 1rem;
}

.flash-alert {
  background-color: var(--color-red-50);
  border: 1px solid var(--color-red-100);
  color: var(--color-red-800);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin: 1rem;
}

/* --------------------------------------------------------------------------
   Card Base Styles
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

/* --------------------------------------------------------------------------
   Logo Styles
   -------------------------------------------------------------------------- */
.logo-block {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-image {
  height: 1.5rem;
  width: auto;
}

@media (min-width: 768px) {
  .logo-image {
    height: 2rem;
  }
}

/* --------------------------------------------------------------------------
   Header Styles
   -------------------------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--color-gray-200);
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (min-width: 768px) {
  .header-container {
    padding: 1rem;
  }
}

/* Header Right Area */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .header-actions {
    gap: 1rem;
  }
}

/* Organizer Badge */
.header-organizer-badge {
  display: none;
}

@media (min-width: 768px) {
  .header-organizer-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.625rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    background-color: var(--color-gray-100);
    color: var(--color-gray-800);
  }
}

/* User Info */
.header-user-info {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

@media (min-width: 768px) {
  .header-user-info {
    gap: 0.5rem;
  }
}

/* User Avatar */
.header-avatar {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--color-gray-200);
}

.header-avatar-placeholder {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-avatar-placeholder .icon {
  width: 1rem;
  height: 1rem;
  color: var(--color-gray-600);
}

/* User Name */
.header-user-name {
  display: none;
}

@media (min-width: 768px) {
  .header-user-name {
    display: inline;
    font-size: 0.875rem;
    color: var(--color-gray-600);
  }
}

/* Menu Button */
.header-menu-wrapper {
  position: relative;
}

.header-menu-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-300);
  background-color: var(--color-white);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background-color var(--transition-normal);
}

.header-menu-button:hover {
  background-color: var(--color-gray-50);
}

.header-menu-button .icon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Dropdown Menu */
.header-dropdown {
  position: absolute;
  right: 0;
  z-index: 10;
  margin-top: 0.5rem;
  width: 14rem;
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.header-dropdown.hidden {
  display: none;
}

.header-dropdown-content {
  padding: 0.25rem 0;
}

.header-dropdown-link {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  color: var(--color-gray-700);
  text-decoration: none;
  transition: background-color var(--transition-normal);
}

.header-dropdown-link:hover {
  background-color: var(--color-gray-100);
  text-decoration: none;
}

.header-dropdown-link .icon {
  margin-right: 0.5rem;
  width: 1rem;
  height: 1rem;
}

.header-dropdown-divider {
  border-top: 1px solid var(--color-gray-100);
}

/* Auth Buttons (Logged Out) */
.header-auth-buttons {
  display: flex;
  gap: 0.5rem;
}

.header-login-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-300);
  background-color: var(--color-white);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  transition: background-color var(--transition-normal);
}

.header-login-button:hover {
  background-color: var(--color-gray-50);
  text-decoration: none;
  color: var(--color-gray-700);
  text-decoration: none;
}

.header-signup-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background-color: var(--color-primary);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  transition: background-color var(--transition-normal);
}

.header-signup-button:hover {
  background-color: var(--color-primary-hover);
  text-decoration: none;
  color: var(--color-white);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Event Tabs
   -------------------------------------------------------------------------- */
.event-tabs {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  margin-bottom: 0;
}

.event-tabs-nav {
  display: flex;
  margin-bottom: -1px;
}

.event-tabs-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  padding: 1rem 0.25rem;
  border-bottom: 2px solid transparent;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-normal), border-color var(--transition-normal);
}

.event-tabs-item--active {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.event-tabs-item--inactive {
  border-color: transparent;
  color: var(--color-gray-500);
}

.event-tabs-item--inactive:hover {
  color: var(--color-gray-700);
  border-color: var(--color-gray-300);
  text-decoration: none;
}

.event-tabs-item .icon {
  width: 1rem;
  height: 1rem;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.event-tabs-item span {
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Email Template Variables
   -------------------------------------------------------------------------- */
.email-vars {
  background-color: var(--color-blue-50);
  border: 1px solid var(--color-blue-100);
  padding: 1rem;
  border-radius: var(--radius-lg);
}

.email-vars-title {
  font-weight: 500;
  color: #1e3a5f;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
}

.email-vars-title .icon {
  width: 1rem;
  height: 1rem;
  margin-right: 0.5rem;
  display: inline;
}

.email-vars-description {
  font-size: 0.875rem;
  color: #1e40af;
  margin-bottom: 0.75rem;
}

.email-vars-list {
  font-size: 0.875rem;
  color: #1e3a8a;
}

.email-vars-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .email-vars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.email-vars-item {
  margin: 0;
}

.email-vars-code {
  background-color: var(--color-blue-100);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
}

.email-vars-note {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background-color: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius);
}

.email-vars-note-text {
  font-size: 0.75rem;
  color: #92400e;
  margin: 0;
}

/* --------------------------------------------------------------------------
   Outline Button
   -------------------------------------------------------------------------- */
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-300);
  background-color: var(--color-white);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background-color var(--transition-normal);
  text-decoration: none;
}

.btn-outline:hover {
  background-color: var(--color-gray-50);
  color: var(--color-gray-700);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Responsive Utilities
   -------------------------------------------------------------------------- */
.hidden-mobile {
  display: none;
}

@media (min-width: 640px) {
  .hidden-mobile {
    display: inline;
  }
}

.hidden-desktop {
  display: inline;
}

@media (min-width: 640px) {
  .hidden-desktop {
    display: none;
  }
}