* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, sans-serif; margin: 0; background: #f5f1e8; color: #333; }
header { background: #c97b54; color: #fff; padding: 1.5rem 1rem; text-align: center; }
header h1 { margin: 0 0 .3rem; font-size: 1.5rem; }
header p { margin: 0; font-size: .9rem; opacity: .92; }
main { max-width: 680px; margin: 0 auto; padding: 1rem; }
section { margin-bottom: 1.5rem; }
h2 { font-size: 1.1rem; border-bottom: 2px solid #c97b54; padding-bottom: .3rem; }

#board-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .8rem; }
.card { background: #fffdf6; border: 1px solid #e5ddc8; border-radius: 8px; padding: .8rem;
        box-shadow: 1px 1px 3px rgba(0,0,0,.08); transform: rotate(-1deg); }
.card:nth-child(even) { transform: rotate(1deg); }
.card .msg { font-size: 1rem; margin-bottom: .5rem; word-break: break-word; }
.card .name { font-size: .8rem; color: #888; text-align: right; }
.empty { color: #999; }

#auth { background: #fff; border-radius: 8px; padding: 1rem; }
input { width: 100%; padding: .6rem; margin: .3rem 0; border: 1px solid #ccc; border-radius: 6px; font-size: 1rem; }
button { background: #c97b54; color: #fff; border: none; padding: .6rem 1rem; border-radius: 6px;
         font-size: .95rem; cursor: pointer; margin: .3rem .3rem .3rem 0; }
button:disabled { background: #ccc; cursor: not-allowed; }
.msg-line { font-size: .85rem; min-height: 1.2em; }
.msg-line.ok { color: #2a8a5a; }
.msg-line.err { color: #c0443a; }
.account-actions { margin-top: 1rem; border-top: 1px dashed #ddd; padding-top: .8rem; font-size: .85rem; }
details { margin-top: .6rem; font-size: .9rem; }
.recovery-login { margin-top: .5rem; }

#modal { position: fixed; inset: 0; background: rgba(0,0,0,.5); display: flex;
         align-items: center; justify-content: center; padding: 1rem; }
#modal[hidden] { display: none; }
.modal-box { background: #fff; border-radius: 10px; padding: 1.5rem; max-width: 420px; }
.modal-box h3 { margin-top: 0; }
.codes { font-family: ui-monospace, monospace; background: #f7f4ec; padding: .8rem 1.5rem; border-radius: 6px; }
.codes li { margin: .2rem 0; }
.chk { display: inline-block; margin: 0 .6rem; font-size: .9rem; }