/* portal/css/style.css */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

/* Core Design Tokens */
:root {
  --primary-color: #00A495;       /* Namuwiki Green */
  --primary-dark: #008f82;
  --primary-light: #e6f6f4;
  --secondary-color: #008275;     /* Deep Teal for Links */
  --text-dark: #202124;           /* High contrast body text */
  --text-muted: #5f6368;          /* Gray text */
  --bg-main: #f5f5f7;             /* Page background (Apple-like) */
  --bg-card: #ffffff;
  --border-color: #e8eaed;
  --border-radius: 16px;
  --border-radius-sm: 10px;
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.03);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 16px 32px rgba(0,0,0,0.1);
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

html.dark {
  --primary-color: #12b886;
  --primary-dark: #0f9b71;
  --primary-light: #183028;
  --secondary-color: #0b9e73;
  --text-dark: #e8eaed;
  --text-muted: #9aa0a6;
  --bg-main: #101418;
  --bg-card: #1c2024;
  --border-color: #2c2e33;
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.2);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 32px rgba(0,0,0,0.6);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
}

body.fade-in-active {
  opacity: 1;
}

a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: color 0.2s, text-decoration 0.2s;
}

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

/* Layout Header */
.header-bar {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.3px;
  text-decoration: none;
  white-space: nowrap;
}

.brand-logo:hover { color: var(--text-dark); }

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background-color: #00a495;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.icon-btn:hover { background-color: var(--bg-main); color: var(--text-dark); }
#theme-icon { display: inline-flex; }

.brand-logo:hover {
  text-decoration: none;
}



.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-links a {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 10px;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-links a:hover,
.nav-links li.active a {
  color: var(--primary-color);
  background-color: var(--primary-light);
  text-decoration: none;
}

/* Main Container */
main.main-content {
  flex: 1;
  max-width: 800px;
  width: 100%;
  margin: 40px auto;
  padding: 0 24px;
}

/* Card Component */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin-bottom: 24px;
}

.card-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  letter-spacing: -0.5px;
}

/* Button Component */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-color);
  color: #ffffff;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 15px;
  font-family: var(--font-family);
  box-shadow: none;
}

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

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

.btn-secondary {
  background-color: #f1f3f4;
  color: var(--text-dark);
  box-shadow: none;
}

.btn-secondary:hover {
  background-color: #e8eaed;
  color: var(--text-dark);
}

/* Neutral outlined button for secondary actions (account settings, Google link) */
.btn-outline {
  background-color: var(--bg-card);
  color: var(--text-dark);
  border: 1px solid var(--border-color);
}

.btn-outline:hover,
.btn-outline-danger:hover {
  text-decoration: none;
}

.btn-outline:hover {
  background-color: #f1f3f4;
  border-color: #dadce0;
  color: var(--text-dark);
}

html.dark .btn-outline:hover {
  background-color: #262a2f;
  border-color: #3c4043;
}

.btn-outline-danger {
  background-color: var(--bg-card);
  color: #d93025;
  border: 1px solid #f5c2bd;
}

.btn-outline-danger:hover {
  background-color: #fce8e6;
  color: #c5221f;
}

html.dark .btn-outline-danger {
  color: #f28b82;
  border-color: #5c2b29;
}

html.dark .btn-outline-danger:hover {
  background-color: #3a2321;
  color: #f6aea9;
}

.btn-danger {
  background-color: #ea4335;
}

.btn-danger:hover {
  background-color: #d93025;
}

.btn-large {
  padding: 16px 32px;
  font-size: 17px;
  border-radius: 16px;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* Daily Challenge Display Box */
.challenge-box {
  background-color: var(--bg-main);
  border-radius: var(--border-radius);
  padding: 32px;
  text-align: center;
  margin: 24px 0;
  border: 1px solid var(--border-color);
}

.challenge-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin: 24px 0;
}

.challenge-node {
  background-color: var(--bg-card);
  border: 2px solid var(--primary-color);
  border-radius: 30px;
  padding: 12px 32px;
  font-size: 20px;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
  color: var(--primary-color);
}

.challenge-node#target-node {
  border-color: #ea4335;
  color: #ea4335;
}

.challenge-arrow {
  font-size: 28px;
  color: var(--text-muted);
  font-weight: 300;
}

/* Extension Alert Banner */
.extension-status-banner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 12px 12px 16px;
  border-radius: 14px;
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
}

.extension-status-banner .banner-icon { flex-shrink: 0; }
.extension-status-banner .banner-title { flex: 1; min-width: 160px; }
.extension-status-banner .banner-actions { display: flex; gap: 8px; }

.extension-status-banner .banner-btn {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 14px;
  border: none;
  border-radius: 10px;
  background-color: #00a495;
  color: #ffffff;
  font-family: var(--font-family);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.extension-status-banner .banner-btn:hover { background-color: #008a7d; color: #ffffff; text-decoration: none; }
.extension-status-banner .banner-btn.ghost { background-color: transparent; color: inherit; }
.extension-status-banner .banner-btn.ghost:hover { background-color: rgba(0, 0, 0, 0.05); color: inherit; }

.extension-status-banner.missing {
  background-color: #fff4e5;
  border-color: #fde3bf;
  color: #8a4b00;
}

.extension-status-banner.installed {
  padding: 10px 16px;
  background-color: var(--primary-light);
  color: var(--primary-dark);
}

.extension-status-banner.paused {
  background-color: var(--primary-light);
  color: var(--primary-dark);
}

html.dark .extension-status-banner.paused { color: var(--primary-color); }
html.dark .extension-status-banner.missing { background-color: #2e2412; border-color: #4a3a1c; color: #f5c16c; }
html.dark .extension-status-banner .banner-btn.ghost:hover { background-color: rgba(255, 255, 255, 0.06); }
html.dark .extension-status-banner.installed { color: var(--primary-color); }

/* Leaderboard Tables */
.leaderboard-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 16px;
}

.leaderboard-table th {
  background-color: var(--bg-main);
  color: var(--text-muted);
  font-weight: 700;
  text-align: left;
  padding: 16px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border-color);
}

.leaderboard-table th:first-child {
  border-top-left-radius: var(--border-radius-sm);
}

.leaderboard-table th:last-child {
  border-top-right-radius: var(--border-radius-sm);
}

.leaderboard-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 15px;
  color: var(--text-dark);
  font-weight: 500;
}

.leaderboard-table tr:hover td {
  background-color: var(--bg-main);
}

.leaderboard-table tr:last-child td {
  border-bottom: none;
}

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-weight: 800;
  font-size: 13px;
}

.rank-badge.rank-1 { background-color: #fef08a; color: #854d0e; }
.rank-badge.rank-2 { background-color: #e2e8f0; color: #475569; }
.rank-badge.rank-3 { background-color: #fed7aa; color: #9a3412; }
.rank-badge.rank-other { background-color: var(--bg-main); color: var(--text-muted); }

.user-badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 6px;
  font-weight: 700;
  margin-left: 8px;
  vertical-align: middle;
}

.user-badge.badge-guest {
  background-color: var(--border-color);
  color: var(--text-muted);
}

.user-badge.badge-member {
  background-color: var(--primary-light);
  color: var(--primary-color);
}

/* Form Styles */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-dark);
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family);
  font-size: 15px;
  outline: none;
  transition: all 0.2s;
  background-color: var(--bg-main);
}

.form-control:focus {
  border-color: var(--primary-color);
  background-color: #ffffff;
  box-shadow: 0 0 0 4px var(--primary-light);
}

/* Finish Screen UI styling */
.finish-summary {
  display: flex;
  justify-content: space-around;
  background-color: var(--primary-light);
  border-radius: var(--border-radius);
  padding: 32px;
  margin-bottom: 32px;
}

.finish-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.finish-stat-val {
  font-size: 42px;
  font-weight: 900;
  color: var(--primary-color);
  letter-spacing: -1px;
}

.finish-stat-lbl {
  font-size: 14px;
  color: var(--secondary-color);
  font-weight: 700;
  margin-top: 4px;
}

.share-textarea {
  width: 100%;
  height: 120px;
  font-family: 'Pretendard', monospace;
  font-size: 14px;
  padding: 16px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-main);
  resize: none;
  margin-bottom: 20px;
  color: var(--text-muted);
}

/* Footer layout */
.footer-bar {
  padding: 32px 0;
  text-align: center;
  font-size: 14px;
  color: var(--text-muted);
  margin-top: auto;
}

/* Google Ads placeholder */
.ad-slot-placeholder {
  display: none !important; /* Temporarily hidden for Beta testing */
  background-color: var(--bg-main);
  border: 2px dashed #dadce0;
  border-radius: var(--border-radius-sm);
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin: 24px 0;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

/* Path styling on finish screen */
.path-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-main);
  padding: 20px;
  border-radius: var(--border-radius-sm);
  margin-bottom: 32px;
}

.path-step {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 14px;
  color: var(--text-dark);
  box-shadow: var(--shadow-sm);
}

.path-separator {
  color: var(--text-muted);
  font-weight: 300;
  font-size: 18px;
}

/* Calendar Date Selector for Leaderboard */
.date-selector-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.date-input {
  padding: 10px 16px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  font-family: var(--font-family);
  font-weight: 700;
  font-size: 15px;
  outline: none;
  color: var(--text-dark);
  background-color: var(--bg-main);
  transition: all 0.2s;
}

.date-input:focus {
  border-color: var(--primary-color);
  background-color: #ffffff;
}

/* Theme select box styling */
.theme-select {
  padding: 8px 12px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 14px;
  outline: none;
  color: var(--text-dark);
  background-color: #ffffff;
  transition: all 0.2s;
  cursor: pointer;
}

.theme-select:focus {
  border-color: var(--primary-color);
}

.theme-selector-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Dark theme overrides */
body.dark-mode {
  --bg-main: #121214;             /* Dark background */
  --bg-card: #1c1c1e;             /* Dark card background */
  --border-color: #2c2c2e;        /* Dark border */
  --text-dark: #f5f5f7;           /* High contrast light text */
  --text-muted: #8e8e93;          /* Muted light text */
  --primary-light: #12302d;       /* Dark green accent background */
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 32px rgba(0,0,0,0.5);
}

/* Header bar overrides in dark mode */
body.dark-mode .header-bar {
  background-color: rgba(28, 28, 30, 0.8) !important;
  border-bottom-color: var(--border-color);
}

/* Calendar input and selector override in dark mode */
body.dark-mode .date-input,
body.dark-mode .form-control,
body.dark-mode .share-textarea,
body.dark-mode .theme-select {
  background-color: #2c2c2e;
  border-color: var(--border-color);
  color: var(--text-dark);
}

body.dark-mode .date-input:focus,
body.dark-mode .form-control:focus,
body.dark-mode .theme-select:focus {
  background-color: #1c1c1e;
  border-color: var(--primary-color);
}

/* Table overrides in dark mode */
body.dark-mode .leaderboard-table th {
  background-color: #2c2c2e;
  border-bottom-color: var(--border-color);
}

body.dark-mode .leaderboard-table tr:hover td {
  background-color: #2c2c2e;
}

body.dark-mode .rank-badge.rank-other {
  background-color: #2c2c2e;
  color: var(--text-muted);
}

body.dark-mode .user-badge.badge-guest {
  background-color: #2c2c2e;
  color: var(--text-muted);
}

/* Challenge node override in dark mode */
body.dark-mode .challenge-node {
  background-color: #2c2c2e;
  box-shadow: var(--shadow-sm);
}

/* Finish screen path override in dark mode */
body.dark-mode .path-step {
  background-color: #2c2c2e;
  border-color: var(--border-color);
  color: var(--text-dark);
}

/* Submission block guest section in dark mode */
body.dark-mode #leaderboard-submission-section {
  background-color: #1c1c1e !important;
  border-color: var(--border-color) !important;
}

/* Guest nickname label color fix */
body.dark-mode #guest-submit-form label {
  color: var(--text-dark) !important;
}

/* User Profile Dropdown Styles */
.user-profile-menu {
  position: relative;
  display: inline-block;
}

.user-profile-trigger {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dark);
  text-decoration: none;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--border-color);
  border-radius: 50%;
  padding: 0;
  background-color: var(--bg-card);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  overflow: hidden;
}

.user-profile-trigger:hover {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.user-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-avatar-svg {
  width: 18px;
  height: 18px;
}

/* The dropdown container */
.user-profile-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 240px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 16px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

/* Bridge element to allow moving mouse from trigger to dropdown */
.user-profile-menu::after {
  content: '';
  position: absolute;
  top: 100%;
  right: 0;
  width: 100%;
  height: 12px;
  display: none;
}

.user-profile-menu:hover::after {
  display: block;
}

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

/* Dropdown inner elements */
.dropdown-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 4px;
}

.dropdown-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1.5px solid var(--border-color);
  background-color: var(--bg-main);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.dropdown-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dropdown-avatar-svg {
  width: 22px;
  height: 22px;
  color: var(--text-muted);
}

.dropdown-info {
  flex: 1;
  min-width: 0; /* allows text truncation */
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dropdown-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dropdown-type-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
}

.dropdown-type-badge.guest {
  background-color: var(--bg-main);
  color: var(--text-muted);
}

.dropdown-type-badge.google {
  background-color: var(--primary-light);
  color: var(--primary-color);
}

.dropdown-type-badge.email {
  background-color: var(--bg-body);
  color: var(--secondary-color);
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 12px 0;
}

.dropdown-menu-items {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--border-radius-sm);
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.dropdown-item:hover {
  background-color: var(--bg-main);
  color: var(--primary-color);
  text-decoration: none;
}

.dropdown-item .item-icon {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.dropdown-item:hover .item-icon {
  color: var(--primary-color);
}

.dropdown-item.logout-btn {
  color: #ea4335;
}

.dropdown-item.logout-btn:hover {
  background-color: #fce8e6;
  color: #c5221f;
}

.dropdown-item.logout-btn:hover .item-icon {
  color: #c5221f;
}

/* Dark mode specific overrides for logout hover */
body.dark-mode .dropdown-item.logout-btn:hover {
  background-color: #2b1513;
  color: #f28b82;
}

body.dark-mode .dropdown-item.logout-btn:hover .item-icon {
  color: #f28b82;
}

/* Tooltip styling for daily challenge nodes */
.challenge-node-tooltip {
  position: absolute;
  z-index: 10000;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  padding: 16px;
  width: 280px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dark);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  font-weight: 400;
  text-align: left;
}

.challenge-node-tooltip::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 8px;
  border-style: solid;
  border-color: transparent transparent var(--bg-card) transparent;
}

.challenge-node-tooltip::after {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 9px;
  border-style: solid;
  border-color: transparent transparent var(--border-color) transparent;
  z-index: -1;
}

.challenge-node-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

.challenge-node {
  cursor: help;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.challenge-node:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}


/* ==========================================
   DAILY CHALLENGE (index)
   ========================================== */
.daily-card { padding: 28px; }

.daily-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.daily-title { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; color: var(--text-dark); }

.date-chip {
  padding: 5px 12px;
  border-radius: 999px;
  background-color: var(--bg-main);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.route {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: stretch;
  gap: 12px;
  margin-bottom: 12px;
}

.route-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 22px 16px 16px;
  border-radius: 18px;
  background-color: var(--bg-main);
  text-align: center;
}

.route-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.route-label::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background-color: var(--primary-color);
}

.route-node.target .route-label::before { background-color: #e5484d; }

.route-word {
  max-width: 100%;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-dark);
  overflow-wrap: anywhere;
  word-break: keep-all;
  line-height: 1.3;
}

.route-node.target .route-word { color: #e5484d; }
html.dark .route-node.target .route-word { color: #ff6b70; }

.route-arrow {
  display: flex;
  align-items: center;
  color: var(--text-muted);
}

.hint-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
  padding: 4px 10px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.hint-btn:hover, .hint-btn[aria-expanded="true"] { background-color: var(--bg-card); color: var(--text-dark); }

.hint-panel {
  margin-bottom: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dark);
}

.hint-panel-title { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 4px; }
.hint-panel-credit { margin-top: 8px; font-size: 12px; color: var(--text-muted); }
.hint-panel-credit a { color: inherit; text-decoration: underline; }

.daily-card .btn-large { margin-top: 8px; height: 56px; border-radius: 16px; }
.btn:disabled, .btn.is-done, .btn:disabled:hover { background-color: var(--border-color); color: var(--text-muted); cursor: not-allowed; }
.btn.is-debug { background-color: #f08c00; }
.btn.is-debug:hover { background-color: #d97c00; }

.section-title { font-size: 17px; font-weight: 800; letter-spacing: -0.3px; color: var(--text-dark); margin-bottom: 16px; }

.rules-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.rules-list li { display: flex; align-items: flex-start; gap: 14px; }

.rules-icon {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-light);
  color: var(--primary-color);
}

.rules-icon.danger { background-color: #fdeced; color: #e5484d; }
html.dark .rules-icon.danger { background-color: rgba(255, 107, 112, 0.14); color: #ff6b70; }
.rules-list b { display: block; font-size: 15px; font-weight: 700; color: var(--text-dark); }
.rules-list span { font-size: 14px; color: var(--text-muted); }

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 760px) {
  .header-container {
    height: auto;
    flex-wrap: wrap;
    padding: 10px 16px 0;
    row-gap: 4px;
  }

  .nav-links {
    position: static;
    transform: none;
    order: 3;
    width: 100%;
    gap: 2px;
    margin: 0 -4px;
    padding-bottom: 6px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a { padding: 8px 12px; font-size: 14px; }

  main.main-content { margin: 20px auto; padding: 0 16px; }
  .card { padding: 22px; border-radius: 18px; }
  .daily-card { padding: 20px; }
  .daily-title { font-size: 19px; }
  .route { grid-template-columns: 1fr; gap: 8px; }
  .route-arrow { justify-content: center; transform: rotate(90deg); }
  .route-word { font-size: 22px; }
}

.hint-btn[hidden], .hint-panel[hidden] { display: none; }