/* ===== Reset & Theme ===== */
:root{
  --bg:#f6f9fc; --card:#ffffff; --text:#1f2937; --muted:#6b7280;
  --primary:#2563eb; --primary-weak:#dbeafe; --danger:#ef4444;
  --border:#e5ecf6; --soft:#f2f6ff;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:'Segoe UI',system-ui,AppleSDGothicNeo,'맑은 고딕',sans-serif;background:var(--bg);color:var(--text)}

/* ===== Layout ===== */
.container{max-width:1200px;margin:32px auto;padding:0 20px}
.panel{background:var(--card);border:1px solid var(--border);border-radius:14px;box-shadow:0 6px 22px rgba(17,24,39,.05)}
.panel h2{margin:0;padding:18px 22px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:12px;border:1px solid var(--border);background:#fff;color:var(--text);cursor:pointer}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.weak{background:var(--primary-weak)}
.btn.danger{background:#fee2e2;border-color:#fecaca;color:#b91c1c}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ===== Room list ===== */
.room{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-top:1px dashed var(--border);cursor:pointer}
.room:first-of-type{border-top:none}
.room:hover{background:var(--soft)}
.room .right{color:#9ca3af}

/* ===== Toolbar / Editor ===== */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;padding:14px}
.toolbar .btn{background:var(--soft);border-color:var(--border)}
.editor-wrap{display:flex;gap:22px}
#calendar{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:10px}

/* ===== Blocks ===== */
.block{position:relative;background:var(--card);border:1px solid var(--border);border-radius:14px;margin:14px 0}
.block .bar{display:flex;justify-content:flex-end;gap:6px;padding:4px 8px}
.block .bar .btn{padding:6px 8px}
.block .body{padding:14px 16px}

/* Text block */
.text-block[contenteditable="true"]{min-height:56px;font-size:18px;outline:none}

/* Todo table */
.todo-table,.custom-table{width:100%;border-collapse:separate;border-spacing:0}
.todo-table th,.todo-table td{border:1px solid var(--border);background:#fbfdff;padding:10px;text-align:center;font-size:16px}
.todo-title-done{text-decoration:line-through;color:#9ca3af !important;font-weight:700}
.todo-status{padding:8px 0 2px 0;font-size:14px}
.todo-status .ok{color:#16a34a}.todo-status .fail{color:#dc2626}

/* Image block */
.img-preview{max-width:100%;border:1px solid var(--border);border-radius:12px;display:block}

/* Table (spreadsheet) */
.table-wrap{padding:8px 12px}
.custom-table th{background:#f4f7ff;text-align:center;font-weight:700}
.custom-table td[contenteditable="true"]{min-width:120px;height:36px;cursor:text}
.custom-table td.sel{outline:2px solid #60a5fa;outline-offset:-2px}
.custom-table .cell-formula{background:#f7ffe3;color:#14532d;font-family:Consolas,monospace}

/* Table controls */
.table-controls{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;padding:10px 0}
.fx-row{display:flex;align-items:center;gap:10px;margin-top:8px}
.fx-label{font-weight:700;color:#374151}
.fx-input{flex:1;border:1px solid var(--border);border-radius:12px;background:#fff;padding:10px 12px;font-family:Consolas,monospace;font-size:16px}

/* Modal */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:9999}
.modal-card{background:#fff;border-radius:14px;border:1px solid var(--border);box-shadow:0 18px 60px rgba(0,0,0,.2);padding:18px;max-width:980px;width:92vw;max-height:90vh;overflow:auto}
.modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}

/* FullCalendar size tune */
.fc-toolbar-title{font-size:20px}

/* Image viewer */
.viewer-wrap{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:10000}
.viewer-card{background:#111;border-radius:10px;padding:10px;max-width:95vw;max-height:95vh}
.viewer-card img{max-width:90vw;max-height:80vh;cursor:grab;display:block;margin:auto}
.viewer-toolbar{display:flex;justify-content:flex-end;margin-bottom:8px}
.viewer-toolbar .btn{background:#fff}