:root{--ink:#0F1218;--cyan:#00E5FF;--cyan-50:#E8FCFF;--white:#fff;--gray-500:#5B6573;--gray-100:#F2F4F7}
*{box-sizing:border-box;margin:0;padding:0}
body{font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,system-ui,sans-serif;color:var(--ink);background:var(--gray-100);min-height:100vh}
.container{max-width:1060px;margin:0 auto;padding:40px 24px}
.hidden{display:none!important}

.top{background:var(--ink);color:#fff}
.top h1{font-size:40px;font-weight:800;line-height:1.1}
.top .sub{color:#9aa3b2;margin-top:8px}

.layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:28px;align-items:start}

/* ===== Календарь ===== */
.cal{background:var(--white);border-radius:16px;box-shadow:0 12px 32px rgba(15,18,24,.08);padding:24px}
.cal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.month-name{font-size:24px;font-weight:800;text-transform:capitalize}
.arrow{border:none;background:var(--ink);color:#fff;width:42px;height:42px;border-radius:10px;font-size:20px;cursor:pointer;transition:transform .15s ease,opacity .15s ease}
.arrow:hover{transform:scale(1.06);opacity:.85}
.arrow:active{transform:scale(.95)}

.weekdays{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-bottom:8px}
.weekdays span{text-align:center;font-size:13px;font-weight:700;color:var(--gray-500);text-transform:uppercase;letter-spacing:.05em}

.grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.day{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:56px;border-radius:10px;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);transition:background .15s ease,transform .15s ease}
.day:hover{background:var(--cyan-50);transform:scale(1.05)}
.day.empty{pointer-events:none}
.day.today{background:var(--ink);color:#fff;box-shadow:0 4px 12px rgba(15,18,24,.25)}
.day.today:hover{background:var(--ink)}
.day.selected{background:var(--cyan);color:var(--ink);box-shadow:0 4px 12px rgba(0,229,255,.4)}
.day.selected:hover{background:var(--cyan)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.day.today .dot,.day.selected .dot{background:#fff}

.cal-foot{text-align:center;margin-top:18px;padding-top:18px;border-top:1px solid var(--gray-100)}
.today-btn{border:none;background:var(--cyan-50);color:var(--ink);padding:10px 24px;border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;transition:background .15s ease}
.today-btn:hover{background:var(--cyan)}

/* ===== Панель дел ===== */
.panel{background:var(--white);border-radius:16px;box-shadow:0 12px 32px rgba(15,18,24,.08);padding:24px;min-height:320px}
.panel-empty{text-align:center;color:var(--gray-500);padding:70px 10px}
.pe-emoji{font-size:44px;margin-bottom:12px}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.panel-date{font-size:22px;font-weight:800}
.close-btn{border:none;background:var(--gray-100);width:36px;height:36px;border-radius:10px;font-size:20px;line-height:1;cursor:pointer;color:var(--gray-500)}
.close-btn:hover{background:var(--cyan-50);color:var(--ink)}

.count{font-size:14px;color:var(--gray-500);margin-bottom:14px}
.notes{list-style:none;margin-bottom:18px;max-height:340px;overflow-y:auto}
.notes:empty::after{content:"Пока пусто — добавь первое дело ниже";color:#b4bcc7;font-size:15px;display:block;padding:8px 0}

.note{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--gray-100)}
.note:last-child{border-bottom:none}
.chk{width:24px;height:24px;border:2px solid #c4ccd6;border-radius:8px;background:var(--white);cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:14px;color:#fff;transition:background .15s ease,border-color .15s ease}
.chk.on{background:var(--cyan);border-color:var(--cyan)}
.note-text{flex:1;font-size:16px}
.note.done .note-text{text-decoration:line-through;color:#aab3bf}
.del{border:none;background:none;color:#c4ccd6;font-size:20px;cursor:pointer;padding:4px;line-height:1}
.del:hover{color:#e5484d}

.add-form{display:flex;gap:10px}
.add-form input{flex:1;border:2px solid var(--gray-100);border-radius:10px;padding:12px 14px;font-size:16px;font-family:inherit;outline:none;transition:border-color .15s ease}
.add-form input:focus{border-color:var(--cyan)}
.add-form button{border:none;background:var(--ink);color:#fff;width:50px;border-radius:10px;font-size:26px;cursor:pointer;flex-shrink:0}
.add-form button:hover{background:#232a35}

@media (max-width:860px){
  .layout{grid-template-columns:1fr}
  .container{padding:28px 16px}
  .top h1{font-size:30px}
  .day{height:48px}
}