/* 나의 작은 편지함 (envelope letterbox). Scoped to My Page's letters view only. */
#dayo-letterbox { display: none; }
body[data-mypage-view="letters"] #dayo-letterbox { display: block; }
body[data-mypage-view="letters"] .mypage-container > :not(#dayo-letterbox) { display: none !important; }

.lb { --lb-ink: #3f3627; --lb-soft: #6b6052; --lb-sage: #5f7d63; --lb-sage-dark: #2f4a33; --lb-line: #e6dcc8; max-width: 720px; margin: 0 auto; padding: 8px 0 32px; color: var(--lb-ink); }
.lb-head { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }
.lb-title { margin: 0; font-family: 'Gowun Batang', 'Nanum Myeongjo', serif; font-size: 28px; font-weight: 700; letter-spacing: -0.3px; color: var(--lb-ink); }
.lb-sub { margin: 0; font-size: 14px; line-height: 1.6; color: var(--lb-soft); }
.lb-sub strong { color: #48634b; }
.lb-sub .lb-unread-count { color: #8a5a2b; }

.lb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr)); gap: 18px 16px; margin: 0; padding: 0; list-style: none; }
@media (max-width: 480px) { .lb-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 12px; } }

/* Envelope: sealed (unread) shows a closed flap and wax seal; opened shows the flap up and the letter peeking out. */
.lb-env { position: relative; display: block; width: 100%; aspect-ratio: 170 / 164; padding: 0; border: none; background: transparent; cursor: pointer; font-family: inherit; color: var(--lb-ink); filter: drop-shadow(0 5px 9px rgba(84, 70, 48, .12)); transition: transform .18s ease; }
.lb-env:hover { transform: translateY(-3px); }
.lb-env:focus-visible { outline: 3px solid var(--lb-sage); outline-offset: 4px; border-radius: 6px; }
.lb-env svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.lb-env-back path { fill: var(--lb-flap, #f2e5c3); stroke: var(--lb-fold, #e2cf9f); stroke-width: 1; vector-effect: non-scaling-stroke; }
.lb-env-front path { fill: var(--lb-front, #fbf3d7); stroke: var(--lb-fold, #e2cf9f); stroke-width: 1; vector-effect: non-scaling-stroke; }
.lb-peek { position: absolute; left: 8%; right: 8%; top: 12%; height: 58%; box-sizing: border-box; padding: 9px 10px; background: #fffefb; border-radius: 4px; box-shadow: 0 2px 8px rgba(84, 70, 48, .14); font-family: 'Gowun Batang', serif; font-size: 11.5px; line-height: 1.6; color: #4a4033; text-align: left; overflow: hidden; transition: transform .2s ease; }
.lb-peek-text { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; max-height: 4.8em; overflow: hidden; white-space: normal; overflow-wrap: anywhere; }
.lb-env:hover .lb-peek { transform: translateY(-4px); }
.lb-seal { position: absolute; left: 50%; top: 61%; width: 32px; height: 32px; margin: -16px 0 0 -16px; border-radius: 50%; background: var(--lb-sage); color: #fffcf6; font: 700 13px/32px 'Gowun Batang', serif; text-align: center; box-shadow: inset 0 0 0 4px #7a9580, 0 2px 4px rgba(47, 74, 51, .25); }
.lb-env-meta { position: absolute; left: 10px; right: 10px; bottom: 8px; display: flex; flex-direction: column; gap: 1px; text-align: left; }
.lb-new { position: absolute; top: 22%; right: 10px; padding: 2px 8px; border-radius: 999px; background: #fffcf6; font-size: 11px; font-weight: 800; color: var(--lb-sage-dark); box-shadow: 0 1px 3px rgba(84, 70, 48, .12); }
.lb-from { font-family: 'Gowun Batang', serif; font-size: 15px; font-weight: 700; color: var(--lb-ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-date { font-size: 11px; font-weight: 700; color: #6b5a42; }

/* Empty letterbox: faint dashed envelopes; tapping one reveals what will arrive. */
.lb-ghost { position: relative; display: block; width: 100%; aspect-ratio: 170 / 120; padding: 0; border: none; background: transparent; cursor: pointer; opacity: .7; transition: transform .2s ease, opacity .2s ease; }
.lb-ghost:hover, .lb-ghost[aria-pressed="true"] { opacity: 1; transform: translateY(-3px); }
.lb-ghost:focus-visible { outline: 3px solid var(--lb-sage); outline-offset: 4px; border-radius: 6px; }
.lb-ghost svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.lb-ghost path { fill: none; stroke: #cdbb97; stroke-width: 1.2; stroke-dasharray: 5 4; vector-effect: non-scaling-stroke; }
.lb-ghost path.lb-ghost-body { fill: rgba(251, 243, 215, .55); }
.lb-ghost-tip { margin: 16px 0 0; padding: 14px 16px; border-radius: 16px; background: #fbf3d7; font-family: 'Gowun Batang', serif; font-size: 16px; line-height: 1.7; color: var(--lb-ink); }
.lb-ghost-tip[hidden] { display: none; }
.lb-grid--ghost + .lb-ghost-tip + .lb-empty, .lb-grid--ghost + .lb-ghost-tip[hidden] + .lb-empty { margin-top: 16px; }
.lb-hint { margin: 16px 0 0; text-align: center; font-size: 12px; color: #8b7d70; }

.lb-empty { padding: 36px 20px; text-align: center; background: #fffcf6; border: 1px dashed #d8cbb2; border-radius: 16px; color: var(--lb-soft); font-size: 14px; line-height: 1.7; }
.lb-empty a { display: inline-flex; align-items: center; min-height: 46px; margin-top: 14px; padding: 0 18px; border-radius: 13px; background: var(--lb-sage); color: #fff; font-weight: 700; text-decoration: none; }

/* Opened letter: bottom sheet on phones, centered card on wider screens. */
.lb-sheet { position: fixed; inset: 0; z-index: 400; display: flex; align-items: flex-end; justify-content: center; background: rgba(63, 54, 39, .42); }
.lb-sheet[hidden] { display: none; }
.lb-sheet-card { width: 100%; max-width: 560px; max-height: calc(100dvh - 24px); overflow-y: auto; overscroll-behavior: contain; box-sizing: border-box; background: #fbf7ee; border-radius: 22px 22px 0 0; padding: 14px 20px calc(24px + env(safe-area-inset-bottom)); display: flex; flex-direction: column; gap: 14px; }
@media (min-width: 768px) { .lb-sheet { align-items: center; padding: 24px; } .lb-sheet-card { border-radius: 22px; padding: 24px 28px 28px; } }
.lb-grip { align-self: center; width: 40px; height: 4px; border-radius: 4px; background: #d8cdb8; }
@media (min-width: 768px) { .lb-grip { display: none; } }
.lb-image { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 12px; border: 6px solid #fff; box-sizing: border-box; box-shadow: 0 4px 14px rgba(84, 75, 64, .12); }
.lb-sheet-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.lb-sheet-title { margin: 0; font-family: 'Gowun Batang', serif; font-size: 21px; color: var(--lb-ink); }
.lb-sheet-date { font-size: 12px; color: #7a6e5f; }
.lb-letter { margin: 0; padding: 16px; background: #fffdf8; border: 1px solid #ece2cf; border-radius: 12px; font-family: 'Gowun Batang', serif; font-size: 16px; line-height: 1.9; color: var(--lb-ink); white-space: pre-line; overflow-wrap: anywhere; }
.lb-actions { display: flex; gap: 8px; }
.lb-actions button { flex: 1; min-height: 48px; border-radius: 13px; font: 700 14px/1.3 inherit; font-family: inherit; cursor: pointer; }
.lb-record { border: none; background: #e8eee1; color: var(--lb-sage-dark); }
.lb-close { border: 1px solid #ddd3c1; background: #fff; color: #544b40; }
.lb-actions button:focus-visible { outline: 3px solid var(--lb-sage); outline-offset: 2px; }