:root{color-scheme:light;--color-bg: #FFFCFC;--color-surface: #FFFFFF;--color-surface-muted: #FFF8FA;--color-line: #FBD8E2;--color-text: #1E3A5F;--color-text-muted: #5A7FA6;--color-primary: #FACAD8;--color-primary-strong: #F0B6C8;--color-accent: #FFE5EC;--color-accent-subtle: #FFF2F6;--color-danger: #DC2626;--color-danger-subtle: #FEE2E2;--color-success: #16A34A;--color-success-subtle: #DCFCE7;--color-warning: #D97706;--color-warning-subtle: #FEF3C7;--color-sidebar-bg: #3D1E2A;--color-sidebar-text: #E2EEF9;--color-on-primary: var(--color-text);--color-primary-rgb: 250, 202, 216;--color-line-rgb: 251, 216, 226;--color-sidebar-rgb: 61, 30, 42;--color-accent-rgb: 255, 229, 236;--color-overlay: rgba(var(--color-sidebar-rgb), .48);--color-bg-gradient-end: #FFF2F6;--color-bg-accent-rgba: rgba(var(--color-primary-rgb), .07);--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 18px;--radius-xl: 24px;--radius-full: 9999px;--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 14px;--font-size-md: 16px;--font-size-lg: 20px;--font-size-xl: 24px;--shadow-sm: 0 1px 4px rgba(var(--color-primary-rgb), .08);--shadow-md: 0 4px 16px rgba(var(--color-primary-rgb), .14);--shadow-lg: 0 12px 40px rgba(var(--color-sidebar-rgb), .18);--bg: var(--color-bg);--surface: var(--color-surface);--line: var(--color-line);--text: var(--color-text);--muted: var(--color-text-muted);--brand: var(--color-primary);--brand-strong: var(--color-primary-strong);--danger: var(--color-danger);--shadow: var(--shadow-md);--radius: var(--radius-lg)}:root[data-season=summer]{--color-bg: #F0F9FF;--color-surface: #FFFFFF;--color-surface-muted: #E0F2FE;--color-line: #BAE6FD;--color-primary: #7DD3FC;--color-primary-strong: #38BDF8;--color-accent: #BAE6FD;--color-accent-subtle: #E0F2FE;--color-bg-gradient-end: #E0F2FE;--color-primary-rgb: 125, 211, 252;--color-line-rgb: 186, 230, 253;--color-sidebar-rgb: 8, 47, 73;--color-accent-rgb: 186, 230, 253;--color-overlay: rgba(var(--color-sidebar-rgb), .42);--shadow-sm: 0 1px 4px rgba(var(--color-primary-rgb), .08);--shadow-md: 0 4px 16px rgba(var(--color-primary-rgb), .14);--shadow-lg: 0 12px 40px rgba(var(--color-sidebar-rgb), .18);--color-bg-accent-rgba: rgba(var(--color-primary-rgb), .07)}:root[data-season=autumn]{--color-bg: #FFFBF5;--color-surface: #FFFFFF;--color-surface-muted: #FFF7ED;--color-line: #FED7AA;--color-primary: #FB923C;--color-primary-strong: #F97316;--color-accent: #FED7AA;--color-accent-subtle: #FFEDD5;--color-bg-gradient-end: #FFEDD5;--color-primary-rgb: 251, 146, 60;--color-line-rgb: 254, 215, 170;--color-sidebar-rgb: 124, 45, 18;--color-accent-rgb: 254, 215, 170;--color-overlay: rgba(var(--color-sidebar-rgb), .42);--shadow-sm: 0 1px 4px rgba(var(--color-primary-rgb), .08);--shadow-md: 0 4px 16px rgba(var(--color-primary-rgb), .14);--shadow-lg: 0 12px 40px rgba(var(--color-sidebar-rgb), .18);--color-bg-accent-rgba: rgba(var(--color-primary-rgb), .07)}:root[data-season=winter]{--color-bg: #F8FAFC;--color-surface: #FFFFFF;--color-surface-muted: #EEF2FF;--color-line: #C7D2FE;--color-primary: #818CF8;--color-primary-strong: #6366F1;--color-accent: #C7D2FE;--color-accent-subtle: #E0E7FF;--color-bg-gradient-end: #E0E7FF;--color-primary-rgb: 129, 140, 248;--color-line-rgb: 199, 210, 254;--color-sidebar-rgb: 49, 46, 129;--color-accent-rgb: 199, 210, 254;--color-overlay: rgba(var(--color-sidebar-rgb), .42);--shadow-sm: 0 1px 4px rgba(var(--color-primary-rgb), .08);--shadow-md: 0 4px 16px rgba(var(--color-primary-rgb), .14);--shadow-lg: 0 12px 40px rgba(var(--color-sidebar-rgb), .18);--color-bg-accent-rgba: rgba(var(--color-primary-rgb), .07)}:root[data-theme=mono]{--color-bg: #F4F4F5;--color-surface: #FAFAFA;--color-surface-muted: #E4E4E7;--color-line: #D4D4D8;--color-text: #18181B;--color-text-muted: #52525B;--color-primary: #D4D4D8;--color-primary-strong: #A1A1AA;--color-accent: #FAFAFA;--color-accent-subtle: #F4F4F5;--color-sidebar-bg: #18181B;--color-sidebar-text: #FFFFFF;--color-bg-gradient-end: #E4E4E7;--color-primary-rgb: 212, 212, 216;--color-line-rgb: 212, 212, 216;--color-sidebar-rgb: 24, 24, 27;--color-accent-rgb: 250, 250, 250;--color-overlay: rgba(var(--color-sidebar-rgb), .5);--shadow-sm: 0 1px 4px rgba(var(--color-sidebar-rgb), .06);--shadow-md: 0 4px 16px rgba(var(--color-sidebar-rgb), .1);--shadow-lg: 0 12px 40px rgba(var(--color-sidebar-rgb), .14);--color-bg-accent-rgba: rgba(var(--color-sidebar-rgb), .04)}:root[data-theme=mono] .sidebar-brand p{color:#ffffffb8}:root[data-theme=mono] .sidebar-link{color:#ffffffd9}:root[data-theme=mono] .sidebar-link.is-active{background:rgba(var(--color-accent-rgb),.14);color:#fff}:root[data-theme=blue]{--color-bg: #F9FAFB;--color-surface: #FFFFFF;--color-surface-muted: #F3F4F6;--color-line: #E5E7EB;--color-text: #111827;--color-text-muted: #6B7280;--color-primary: #2563EB;--color-primary-strong: #1D4ED8;--color-accent: #DBEAFE;--color-accent-subtle: #EFF6FF;--color-sidebar-bg: #FFFFFF;--color-sidebar-text: #374151;--color-bg-gradient-end: #F3F4F6;--color-on-primary: #FFFFFF;--color-primary-rgb: 37, 99, 235;--color-line-rgb: 229, 231, 235;--color-sidebar-rgb: 17, 24, 39;--color-accent-rgb: 219, 234, 254;--color-overlay: rgba(var(--color-sidebar-rgb), .45);--shadow-sm: 0 1px 2px rgba(var(--color-sidebar-rgb), .05);--shadow-md: 0 2px 8px rgba(var(--color-sidebar-rgb), .07);--shadow-lg: 0 8px 28px rgba(var(--color-sidebar-rgb), .12);--color-bg-accent-rgba: rgba(var(--color-primary-rgb), .05)}:root[data-theme=blue] .sidebar{border-right:1px solid var(--color-line)}:root[data-theme=blue] .sidebar-brand p{color:var(--color-text-muted)}:root[data-theme=blue] .sidebar-link{color:#374151}:root[data-theme=blue] .sidebar-link.is-active{background:var(--color-accent-subtle);color:var(--color-primary-strong)}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Malgun Gothic,sans-serif;background:radial-gradient(circle at top left,var(--color-bg-accent-rgba),transparent 28%),linear-gradient(180deg,var(--color-bg) 0%,var(--color-bg-gradient-end) 100%);color:var(--color-text);min-height:100vh}html,body{overflow-x:hidden}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px}.auth-panel{width:100%;max-width:460px;background:#ffffffeb;border:1px solid rgba(var(--color-line-rgb),.9);border-radius:28px;box-shadow:var(--shadow);padding:32px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.auth-panel-wide{max-width:760px}.auth-copy h1,.page-heading h2,.hero-card h2{margin:8px 0 10px;font-size:32px;line-height:1.15}.auth-copy p:last-child,.hero-card p,.page-heading p{margin:0;color:var(--muted)}.header-eyebrow{margin:0;color:var(--color-primary);font-size:12px;font-weight:800;letter-spacing:.2em;text-transform:uppercase}.auth-form,.page-stack,.panel,.form-panel{display:flex;flex-direction:column;gap:16px}.auth-form{margin-top:24px}.auth-form-grid,.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.form-field{display:flex;flex-direction:column;gap:8px}.form-label{font-size:14px;color:var(--muted)}.form-input,.form-textarea,.form-select{width:100%;min-height:44px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 14px;color:var(--text);outline:none;font-size:var(--font-size-base)}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--color-primary);box-shadow:0 0 0 4px rgba(var(--color-primary-rgb),.18)}.form-select{cursor:pointer;-webkit-appearance:auto;-moz-appearance:auto;appearance:auto}.form-select:disabled{opacity:.6;cursor:not-allowed}.form-textarea{resize:vertical;min-height:120px}.is-error{border-color:var(--danger)}.form-error,.form-submit-error{color:var(--danger);font-size:13px;margin:0}.form-helper{font-size:13px;color:var(--muted);margin:0}.form-helper-span{grid-column:1 / -1}.checkbox-field{display:inline-flex;align-items:center;gap:10px;min-height:44px}.btn{border:0;border-radius:14px;padding:13px 18px;cursor:pointer;font-weight:700;min-height:44px}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-strong));color:var(--color-on-primary);font-weight:700;font-size:14px}.btn-secondary{background:var(--color-surface-muted);color:var(--text);border:1px solid var(--color-line)}.auth-link-text,.text-link{color:var(--muted);font-size:14px}.text-link{color:var(--color-primary-strong)}.auth-register-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 20px;border:1px solid rgba(var(--color-primary-rgb),.35);border-radius:8px;background:rgba(var(--color-accent-rgb),.72);color:var(--color-primary-strong);cursor:pointer;font-weight:700}.admin-shell{height:100vh;min-height:0;display:grid;grid-template-columns:260px 1fr}.sidebar{padding:24px;background:var(--color-sidebar-bg);color:var(--color-sidebar-text);display:flex;flex-direction:column;gap:28px}.sidebar-drawer{transition:transform .25s ease}.sidebar-overlay{display:none}.sidebar-brand{display:flex;align-items:center;gap:14px}.sidebar-brand p{margin:4px 0 0;color:#e2eef9a6;font-size:12px}.sidebar-mark{width:52px;height:52px;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-strong));color:var(--color-on-primary);font-weight:800}.sidebar-nav{display:flex;flex-direction:column;gap:10px}.sidebar-link{display:flex;align-items:center;min-height:44px;padding:12px 14px;border-radius:12px;color:#e2eef9c7}.sidebar-link.is-active{background:rgba(var(--color-primary-rgb),.15);color:var(--color-accent)}.admin-main{display:flex;flex-direction:column;min-height:0}.admin-header{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:24px 28px;border-bottom:1px solid rgba(var(--color-line-rgb),.85);background:#ffffffd9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.admin-header-main{display:flex;align-items:center;gap:12px;min-width:0}.header-title{margin:6px 0 0;font-size:24px}.header-actions{display:flex;align-items:center;gap:16px}.header-user{display:flex;flex-direction:column;align-items:flex-end;gap:4px;color:var(--muted)}.header-chat-btn{position:relative}.header-chat-badge{position:absolute;top:-6px;right:-6px;min-width:18px;height:18px;padding:0 4px;border-radius:9px;background:var(--danger);color:#fff;font-size:11px;font-weight:700;line-height:18px;text-align:center}.sidebar-hamburger{display:none;align-items:center;justify-content:center;width:44px;min-width:44px;min-height:44px;padding:0;border:1px solid rgba(var(--color-line-rgb),.9);border-radius:var(--radius-sm);background:#ffffffeb;color:var(--color-primary-strong);cursor:pointer;flex-shrink:0}.sidebar-hamburger__icon{font-size:18px;line-height:1}.admin-content{flex:1;min-height:0;overflow-y:auto;padding:28px}.page-stack{gap:22px}.hero-card,.panel{background:var(--color-surface);border:1px solid rgba(var(--color-line-rgb),.9);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-card,.panel,.form-panel{padding:24px}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:16px}.summary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.summary-card{background:var(--color-surface);border:1px solid rgba(var(--color-line-rgb),.9);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.summary-card span{display:block;color:var(--muted);font-size:14px;margin-bottom:10px}.summary-card strong{font-size:30px}.panel-header{display:flex;justify-content:space-between;align-items:center}.table-wrap{overflow-x:auto}.data-table{width:100%;border-collapse:collapse}.data-table th,.data-table td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--line);font-size:14px}.data-table th{color:var(--muted);font-weight:700}.empty-cell{text-align:center;color:var(--muted)}.alert{border-radius:14px;padding:14px 16px;font-size:14px}.alert-error{background:var(--color-danger-subtle);color:var(--color-danger);border:1px solid rgba(220,38,38,.16)}.alert-info{background:var(--color-accent-subtle);color:var(--color-primary-strong);border:1px solid rgba(var(--color-primary-rgb),.16)}.form-actions{display:flex;align-items:center;gap:12px}.status-badge{display:inline-flex;align-items:center;border-radius:999px;padding:7px 11px;font-size:13px;font-weight:800}.badge-gray{background:#eef2f7;color:#4a6885}.badge-blue{background:var(--color-accent-subtle);color:var(--color-primary-strong)}.badge-yellow{background:#fff6d8;color:#8a6500}.badge-green{background:var(--color-success-subtle);color:var(--color-success)}.badge-red{background:var(--color-danger-subtle);color:var(--color-danger)}.template-preview h3,.panel-header h3{margin:4px 0 0}.template-content,.raw-input-box{margin:0;white-space:pre-wrap;border:1px solid var(--line);border-radius:14px;background:#fff;padding:16px;color:var(--text);line-height:1.6}.template-actions{margin-top:12px}.detail-meta{gap:8px}.detail-meta p{margin:0;color:var(--muted)}.markdown-viewer{border:1px solid var(--line);border-radius:14px;background:#fff;padding:18px;line-height:1.7}.markdown-viewer h1,.markdown-viewer h2,.markdown-viewer h3{margin-top:0}.page-loader,.not-found-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}@media (min-width: 768px) and (max-width: 1023px){.summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-content{padding:22px}.admin-header{padding:20px 22px}}@media (max-width: 767px){.admin-shell{grid-template-columns:1fr;height:auto;min-height:100vh}.admin-header,.page-heading{flex-direction:column;align-items:flex-start;gap:var(--space-sm)}.auth-form-grid,.form-grid,.summary-grid{grid-template-columns:1fr}.admin-content{padding:18px;overflow:visible;min-height:auto}}.messenger-page-shell{display:flex;flex-direction:column;gap:16px;flex:1;min-height:0;height:100%;overflow:hidden}.messenger-page__tabs{display:inline-flex;align-items:center;gap:8px;width:fit-content;max-width:100%;padding:8px;border:1px solid rgba(var(--color-line-rgb),.9);border-radius:18px;background:#ffffffe6;box-shadow:var(--shadow)}.messenger-tab{border:1px dashed rgba(var(--color-primary-rgb),.34);border-radius:12px;background:transparent;color:var(--muted);font-size:var(--font-size-base);font-weight:700;padding:10px 16px;min-height:44px;cursor:pointer;transition:border-color .15s ease,color .15s ease,background .15s ease}.messenger-tab:active,.messenger-tab:focus-visible{border-color:var(--color-primary-strong);color:var(--color-primary-strong)}.messenger-tab--active{border:1px solid transparent;background:linear-gradient(135deg,rgba(var(--color-primary-rgb),.16),rgba(var(--color-primary-rgb),.06));color:var(--color-primary-strong)}.messenger-layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:20px;flex:1;min-height:0;height:100%}.messenger-sidebar-panel,.messenger-main-panel{min-height:0}.messenger-room-list,.chatroom-layout,.messenger-member-list{background:var(--color-surface);border:1px solid rgba(var(--color-line-rgb),.9);border-radius:var(--radius);box-shadow:var(--shadow)}.messenger-room-list{display:flex;flex-direction:column;height:100%;overflow:hidden}.messenger-room-list-header,.messenger-member-header,.chatroom-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px 22px;border-bottom:1px solid 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p,.messenger-list-caption,.messenger-input-count,.messenger-meta,.typing-indicator{color:var(--muted);font-size:13px}.messenger-room-preview{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.messenger-empty-state{display:flex;align-items:center;justify-content:center;min-height:180px;color:var(--muted);padding:24px;text-align:center}.messenger-empty-state.is-large{height:100%}.chatroom-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;height:100%;min-height:0;overflow:hidden}.chatroom-main{display:flex;flex-direction:column;height:100%;min-height:0}.chatroom-header{background:#ffffffd9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.chatroom-header p{margin:6px 0 0}.chatroom-header-actions{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:12px}.chatroom-alone-notice{margin:16px 20px 0;padding:12px 14px;border:1px solid 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10px;font-size:12px;color:var(--muted)}.messenger-row{display:flex;flex-direction:column;margin-bottom:14px}.messenger-row.is-mine{align-items:flex-end}.messenger-row.is-other{align-items:flex-start}.messenger-row.is-system{align-items:center}.messenger-author{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin-bottom:4px}.badge-ai{display:inline-flex;align-items:center;padding:1px 6px;border-radius:var(--radius-sm);background:var(--color-accent-subtle);color:var(--color-primary-strong);font-size:var(--font-size-xs);font-weight:700;letter-spacing:.02em;line-height:1.4;vertical-align:middle}.messenger-bubble{max-width:min(78%,760px);border-radius:18px;padding:14px 16px;background:var(--color-surface-muted);border:1px solid 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