:root {
  --blue: #3182f6;
  --blue-hover: #2272eb;
  --blue-light: #e8f3ff;
  --bg: #f9fafb;
  --card: #ffffff;
  --line: #e5e8eb;
  --grey-100: #f2f4f6;
  --grey-400: #b0b8c1;
  --grey-500: #8b95a1;
  --grey-600: #6b7684;
  --grey-700: #4e5968;
  --ink: #191f28;
  --error: #f04452;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Toss Product Sans", "Tossface", "SF Pro KR",
    "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 24px 20px 64px; }

h1 { font-size: 26px; font-weight: 700; margin: 8px 0 4px; }
h2 { font-size: 18px; font-weight: 600; margin: 0 0 12px;
     padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.sub { color: var(--grey-600); font-size: 14px; margin: 0 0 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  margin-bottom: 16px;
}

label { display: block; font-size: 14px; font-weight: 600;
        color: var(--grey-700); margin-bottom: 8px; }

input[type=text] {
  width: 100%;
  background: rgba(0,23,51,0.02);
  border: 1px solid rgba(2,32,71,0.05);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 16px;
  color: var(--ink);
  outline: none;
}
input[type=text]:focus { border-color: var(--blue); }

.btn {
  width: 100%;
  height: 56px;
  border: none;
  border-radius: 16px;
  background: var(--blue);
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--blue-hover); }
.btn:disabled { opacity: 0.5; cursor: default; }

.btn-weak {
  height: 44px; border-radius: 12px;
  background: rgba(2,32,71,0.05); color: var(--grey-700);
  font-size: 14px; font-weight: 600; border: none; cursor: pointer;
  padding: 0 14px; width: auto;
}

.row { display: flex; gap: 8px; align-items: center; }
.muted { color: var(--grey-500); font-size: 13px; }
.note { font-size: 13px; margin-top: 8px; min-height: 18px; }
.note.ok { color: var(--blue); }
.note.err { color: var(--error); }

.sharebox {
  display: flex; gap: 8px; align-items: center;
  background: var(--blue-light); border-radius: 12px; padding: 10px 12px;
  margin-bottom: 16px;
}
.sharebox .link { flex: 1; font-size: 13px; color: var(--grey-700);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 격자 공통 */
.grid {
  display: grid;
  grid-template-columns: 34px repeat(7, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  user-select: none;
}
.grid .corner, .grid .dayhd, .grid .hourlabel {
  background: #fff; font-size: 12px; color: var(--grey-600);
  display: flex; align-items: center; justify-content: center;
}
.grid .dayhd { height: 28px; font-weight: 600; color: var(--grey-700); }
.grid .hourlabel { font-size: 11px; }
.grid .cell {
  background: #fff; min-height: 22px;
  touch-action: pan-y; cursor: pointer;
}
.grid.input .cell.on { background: var(--blue); }
.grid.heat .cell { cursor: pointer; }
.grid.heat .cell.sel { outline: 2px solid var(--ink); outline-offset: -2px; }

.legend { display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--grey-600); margin: 10px 0; }
.legend .bar { flex: 1; height: 10px; border-radius: 5px;
  background: linear-gradient(90deg, #f2f4f6, #3182f6); }

.detail { margin-top: 12px; font-size: 14px; color: var(--grey-700);
  min-height: 22px; }
.detail b { color: var(--ink); }
.namelist { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.namelist .chip { background: var(--grey-100); border-radius: 8px;
  padding: 4px 10px; font-size: 13px; color: var(--grey-700); }