/* Base */ 
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --font:'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --sb-bg:#FAFAFA;
  --sb-border:#D4D4D8;
  --ink:#0A0A0A;
  --muted:#6B7280;
  --border:#E5E7EB;
  --danger:#DC2626;
  --today:#0090FF;
  --badge:#F5F5F5;
  --btnAdd:#22C55E;
  --tabs-bg:#F5F5F5;
  --tab-active-border:#000000;
}
body{font-family:var(--font);background:#fff;color:var(--ink)}
.app{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{width:256px;background:var(--sb-bg);border-right:0.8px solid var(--sb-border);padding:16px}
.brand-wrap{padding:0 0 12px 0;border-bottom:0.8px solid var(--sb-border);margin-bottom:12px}
.brand{font-weight:700;font-size:30px;line-height:45px;color:var(--ink)}
.nav{display:flex;flex-direction:column;gap:4px}
.nav-btn{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;border:1px solid transparent;background:transparent;cursor:pointer}
.nav-btn.active{background:#EFEFF1;border:1px solid var(--sb-border)}
.sb-ic{width:18px;height:18px}

/* Main / Header */
.main{flex:1;padding:20px 24px}
.header{display:flex;align-items:center;gap:12px;justify-content:flex-start}
.page-ic{display:block}
.title-col{display:flex;flex-direction:column;gap:2px;margin-left:6px}
.title-col h1{font-size:28px;font-weight:700;line-height:36px;color:var(--ink)}
.page-sub{font-size:14px;line-height:20px;color:#222}

/* Add Task */
.add-btn{margin-left:auto;background:var(--btnAdd);color:#fff;border:0;border-radius:6px;height:36px;min-width:110.3px;padding:0 12px;font-weight:600;display:inline-flex;align-items:center;gap:8px;cursor:pointer}
.add-btn .plus{font-weight:700}

/* Progress */
.progress{margin-top:12px}
.progress-top{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--muted);margin:8px 0}
.bar{height:8px;background:#EEE;border-radius:999px;overflow:hidden;max-width:420px}
#barFill{height:100%;width:0;background:#111}

/* Tabs */
.tabs{margin:14px 0}
.tabs-bg{display:inline-flex;gap:8px;background:var(--tabs-bg);border-radius:8px;padding:4px}
.tab{background:transparent;border:0;border-radius:8px;height:36px;min-width:169.49px;padding:0 10px;cursor:pointer;font-weight:600}
.tab.active{background:#fff;border:0.8px solid var(--tab-active-border);padding:4px 8px;height:29px;margin-top:3.5px;margin-left:3px}

/* Groups / Titles */
.group-list{margin-top:8px;max-width:980px}
.section-head{display:flex;align-items:center;gap:8px;margin:16px 0 10px}
.section-head .name{font-size:16px;line-height:24px;font-weight:400}
.section-head .count{background:var(--badge);width:23.64px;height:22px;border-radius:4px;display:grid;place-items:center;font-size:12px;color:#111}
.section-overdue .name{color:var(--danger)}
.section-today .name{color:var(--today)}
.section-default .name{color:#6B7280}

/* Task */
.task{display:flex;align-items:center;gap:12px;border:1px solid var(--border);border-radius:12px;background:#fff;padding:12px;margin-bottom:10px}
.title-col2{display:flex;flex-direction:column}
.title-text{font-size:14.5px;color:#111}
.meta{display:flex;gap:8px;align-items:center;color:#9AA0A6;font-size:12px;margin-top:4px}
.meta .due{display:flex;gap:6px;align-items:center}
.meta .due img{width:14px;height:14px}

/* Checkbox (Primitive.button.png) */
.chk{position:relative;width:18px;height:18px;border:2px solid #CFD6E4;border-radius:4px;background:#fff;flex:0 0 18px;display:grid;place-items:center;overflow:hidden}
.chk img{display:none;width:16px;height:16px}
.task.done .chk img{display:block}
.task.done .title-text{text-decoration:line-through;color:#9AA0A6}

/* Star */
.star{margin-left:auto;width:16px;height:16px;opacity:0;transition:opacity .15s}
.task:hover .star{opacity:.35}
.task.important .star{opacity:1}
.star img{width:16px;height:16px;display:block}

/* Modal */
.modal-backdrop{position:fixed;inset:0;display:flex;justify-content:center;align-items:center;background:rgba(0,0,0,.45);padding:16px}
[hidden]{display:none!important}
.modal{background:#fff;width:480px;max-width:92vw;border:1px solid var(--border);border-radius:12px;padding:18px}
.modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.modal-title{font-weight:700}
.modal-close{background:transparent;border:0;font-size:20px;cursor:pointer}
.label{font-size:13px;color:#111;margin:10px 0 6px}
.input,select.input,textarea.input{width:100%;border:1px solid var(--border);border-radius:10px;padding:10px;background:#fff;font:inherit}
.with-icon{display:flex;align-items:center;gap:8px}
.input-ic{width:16px;height:16px}
.priority{display:flex;gap:8px;margin-top:4px}
.prio{border:1px solid var(--border);border-radius:10px;background:#fff;padding:8px 14px;cursor:pointer}
.prio.active{background:#FFF6DB;border-color:#F5D27A}
.hint{color:#9AA0A6;font-size:12px;margin-top:4px}
.tag-list{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.tag{background:#EEF2FF;border:1px solid #D0D7FF;padding:4px 8px;border-radius:12px;font-size:12px}
.modal-actions{display:flex;gap:10px;margin-top:10px}
.btn-cancel{background:#fff;border:1px solid var(--border);border-radius:8px;padding:10px 14px;cursor:pointer}