/* A quiet, local-first letter. No external fonts or image dependencies. */
:root {
  color-scheme: light;
  --bg: #f6f2eb;
  --surface: #fbf8f2;
  --paper: #fffcf5;
  --ink: #39313e;
  --muted: #7e7480;
  --faint: #9d919c;
  --accent: #877197;
  --accent-dark: #715a83;
  --accent-soft: #ebe3ee;
  --line: #dfd7d4;
  --shadow: 0 16px 50px rgba(72, 47, 61, .07);
  --serif: "Songti SC", "Noto Serif CJK SC", "Noto Serif SC", "STSong", "SimSun", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --reader-size: 19px;
  --header-height: 80px;
}
:root[data-theme="night"] {
  color-scheme: dark;
  --bg: #211e28;
  --surface: #29252f;
  --paper: #302b35;
  --ink: #e4dbe3;
  --muted: #b4a7b4;
  --faint: #a696a8;
  --accent: #bba4cb;
  --accent-dark: #cab4d8;
  --accent-soft: #3a3044;
  --line: #49404c;
  --shadow: 0 16px 50px rgba(0, 0, 0, .17);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 24px); }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 14px; line-height: 1.6; -webkit-tap-highlight-color: transparent; }
body::before { content: ""; position: fixed; inset: 0; z-index: 100; pointer-events: none; opacity: .027; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath fill='%23000' filter='url(%23n)' opacity='.8' d='M0 0h160v160H0z'/%3E%3C/svg%3E"); }
body.modal-open { overflow: hidden; }
[hidden] { display: none !important; }
button, input { font: inherit; }
button { color: inherit; cursor: pointer; }
button, a { touch-action: manipulation; }
button { border: 0; background: none; }
a { color: inherit; text-decoration: none; }
button:disabled { cursor: default; opacity: .35; }
button:focus-visible, a:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 4px; }
section[tabindex="-1"]:focus { outline: none; }
::selection { background: var(--accent-soft); color: var(--ink); }
h1, h2, h3, p { margin: 0; }
.svg-definitions { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 21px; height: 21px; display: inline-block; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; vertical-align: middle; }
.skip-link { position: fixed; top: 10px; left: 16px; z-index: 130; transform: translateY(-180%); background: var(--paper); padding: 12px 18px; border: 1px solid var(--accent); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 30; min-height: var(--header-height); padding: 10px max(32px, calc((100vw - 1180px) / 2)); padding-top: max(10px, env(safe-area-inset-top)); display: flex; align-items: center; justify-content: space-between; gap: 24px; background: var(--bg); border-bottom: 1px solid transparent; }
body.letter-open .site-header { border-bottom-color: var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 23px; letter-spacing: 2px; white-space: nowrap; }
.brand-flower { width: 29px; height: 29px; color: var(--accent); stroke-width: 1; }
.brand-dot { color: var(--accent); }
.header-caption { color: var(--muted); letter-spacing: 2px; font-size: 11px; margin-left: 74px; }
.header-actions { display: flex; align-items: center; gap: 13px; }
.icon-button { width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; transition: background .2s, color .2s; font-size: 22px; }
.icon-button:hover { background: var(--accent-soft); color: var(--accent); }
.header-divider { width: 1px; height: 17px; background: var(--line); display: inline-block; }
.header-read { padding: 8px 0 8px 5px; display: flex; align-items: center; gap: 11px; font-size: 12px; letter-spacing: 1px; }
.header-read .icon { width: 18px; }
.cover { position: relative; isolation: isolate; overflow: hidden; max-width: 1380px; margin: 0 auto; padding: 0 64px; }
.cover-glow { position: absolute; inset: -80px -100px 0; z-index: -1; background: radial-gradient(ellipse at 75% 40%, rgba(221, 200, 219, .47), transparent 44%), radial-gradient(ellipse at 49% 70%, rgba(235, 210, 193, .32), transparent 40%); pointer-events: none; }
.cover-content { width: 100%; max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.1fr; align-items: center; gap: 18px; min-height: min(660px, calc(100svh - 180px)); padding: 64px 0 73px; }
.cover-copy { padding: 0 0 8px 0; position: relative; z-index: 2; }
.eyebrow { font-size: 10px; letter-spacing: 3px; color: var(--accent); font-weight: 500; display: flex; align-items: center; gap: 12px; }
.little-line { width: 27px; height: 1px; background: var(--accent); opacity: .75; }
h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(36px, 4.1vw, 58px); line-height: 1.65; letter-spacing: .01em; margin: 25px 0 20px; white-space: nowrap; }
.title-accent { color: var(--accent-dark); position: relative; display: inline-block; }
.title-accent svg { position: absolute; width: 101%; height: 19px; bottom: -1px; left: -2px; fill: none; stroke: #b1a0b7; stroke-width: 1.3; opacity: .7; }
.title-period { margin-left: -.12em; }
.cover-description { color: var(--muted); line-height: 2.1; letter-spacing: 1.6px; font-size: 14px; }
.primary-button { margin-top: 33px; display: inline-flex; align-items: center; justify-content: space-between; gap: 34px; min-height: 53px; padding: 6px 8px 6px 26px; background: var(--accent); color: #fffaf5; border-radius: 4px; font-size: 13px; letter-spacing: 2px; box-shadow: 0 5px 20px rgba(111, 80, 130, .12); transition: background .2s, transform .2s, box-shadow .2s; }
.primary-button:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(111, 80, 130, .18); }
.button-arrow { width: 36px; height: 36px; border-radius: 2px; display: grid; place-items: center; background: rgba(255,255,255,.12); }
.button-arrow .icon { width: 19px; }
.opening-note { margin-top: 15px; font-size: 14px; color: var(--muted); letter-spacing: .5px; }
.envelope-scene { position: relative; width: 100%; max-width: 650px; justify-self: center; padding-top: 19px; }
.scene-caption { position: absolute; top: 2px; left: 13%; transform: rotate(-5deg); font-family: Georgia, var(--serif); color: var(--muted); opacity: .85; font-style: italic; font-size: 13px; letter-spacing: .1px; }
.floating-flower { position: absolute; width: 35px; height: 35px; top: 52px; right: 9%; color: var(--accent); opacity: .6; transform: rotate(14deg); }
.envelope-button { display: flex; flex-direction: column; width: 100%; align-items: center; padding: 0; border-radius: 12px; }
.envelope-art { display: block; width: 110%; max-width: 640px; height: auto; transform: rotate(-7deg); transition: transform .6s cubic-bezier(.2,.65,.3,1); overflow: visible; }
.envelope-button:hover .envelope-art { transform: translateY(-6px) rotate(-5deg); }
.envelope-paper { transform: translateY(0); transition: transform .75s cubic-bezier(.18,.7,.3,1) .35s; }
.envelope-flap { transform-box: fill-box; transform-origin: 50% 0; transition: transform .6s cubic-bezier(.45,0,.3,1) .12s; }
.wax-seal { transform-box: fill-box; transform-origin: center; transition: opacity .25s, transform .35s; }
.envelope-scene.is-open .envelope-art { transform: rotate(-3deg); }
.envelope-scene.is-open .envelope-flap { transform: scaleY(-1); }
.envelope-scene.is-open .envelope-paper { transform: translateY(-137px); }
.envelope-scene.is-open .wax-seal { opacity: 0; transform: translateY(15px) scale(.8); }
.envelope-hint { display: inline-flex; align-items: center; justify-content: center; gap: 10px; color: var(--accent-dark); background: var(--accent-soft); border: 1px solid var(--line); border-radius: 7px; padding: 9px 15px; font-size: 14px; line-height: 1.7; font-weight: 500; letter-spacing: .5px; margin-top: 8px; }
.hint-dot { width: 4px; height: 4px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 0 4px var(--accent-soft); }
.scene-sidenote { display: flex; justify-content: space-between; padding: 32px 9% 0; font-size: 8px; color: var(--faint); letter-spacing: 2px; }
.cover-bottom { display: flex; align-items: center; justify-content: space-between; gap: 30px; width: 100%; max-width: 1180px; margin: 0 auto; border-top: 1px solid var(--line); padding: 28px 0 31px; }
.cover-memory { display: flex; align-items: center; gap: 15px; color: var(--muted); font-size: 10px; letter-spacing: 1px; }
.memory-number { font-family: Georgia, serif; color: var(--ink); font-size: 32px; font-weight: 400; line-height: 1; }
.cover-quote { font-family: var(--serif); color: var(--muted); font-size: 13px; letter-spacing: 1px; }
.cover-bottom-label { color: var(--faint); letter-spacing: 1.6px; font-size: 8px; display: flex; align-items: center; gap: 18px; }
.cover-bottom-label span { font-size: 23px; font-family: var(--serif); color: var(--accent); }
.experience { animation: appear .6s ease both; }
.reader-section { padding: 66px 24px 0; scroll-margin-top: 20px; }
.section-ornament { display: flex; align-items: center; justify-content: center; gap: 20px; color: var(--accent); margin-bottom: 34px; }
.section-ornament span { width: 55px; height: 1px; background: var(--line); }
.section-ornament .icon { width: 24px; height: 24px; stroke-width: 1; }
.reader-heading { text-align: center; margin-bottom: 35px; }
.reader-heading .eyebrow { justify-content: center; font-size: 9px; letter-spacing: 2.7px; }
.reader-heading h2 { font-family: var(--serif); font-weight: 400; font-size: 36px; letter-spacing: 3px; margin: 14px 0 10px; }
.tiny-flower { color: var(--accent); font-size: 24px; margin-left: 13px; vertical-align: top; }
.reader-heading > p:last-child { font-size: 12px; color: var(--muted); letter-spacing: 1.5px; }
.reader-shell { max-width: 760px; margin: 0 auto; position: relative; }
.margin-note { position: absolute; width: 110px; left: -170px; top: 128px; color: var(--muted); }
.margin-note span { font-size: 9px; letter-spacing: 2px; line-height: 2.3; }
.margin-note p { font-size: 20px; letter-spacing: 3px; font-family: var(--serif); line-height: 1.9; margin-top: 22px; }
.margin-note i { width: 28px; height: 1px; display: block; background: var(--line); margin: 25px 0; }
.reader-tools { position: sticky; top: var(--sticky-offset, var(--header-height)); z-index: 12; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 13px 0 17px; background: var(--bg); }
.view-switch { display: inline-flex; align-items: center; padding: 4px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
.view-switch button { padding: 7px 17px; min-height: 36px; font-size: 12px; color: var(--muted); border-radius: 3px; letter-spacing: .5px; transition: background .2s, color .2s; }
.view-switch button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-dark); }
.reading-actions { display: flex; align-items: center; gap: 7px; }
.tool-button { min-height: 44px; padding: 8px 10px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; font-size: 11px; color: var(--muted); border-radius: 4px; white-space: nowrap; }
.tool-button .icon { width: 18px; height: 18px; }
.tool-button:hover { background: var(--accent-soft); color: var(--accent-dark); }
.tool-button[aria-pressed="true"] { color: var(--accent-dark); }
.tool-button[aria-pressed="true"] .icon { fill: var(--accent-soft); }
.font-controls { display: flex; align-items: center; }
.font-controls button { min-width: 38px; min-height: 44px; padding: 4px; font-size: 13px; color: var(--muted); }
.font-controls button:hover:not(:disabled) { color: var(--accent); }
.paper-wrap { position: relative; isolation: isolate; border: 1px solid var(--line); border-radius: 3px; background: var(--paper); box-shadow: var(--shadow); padding: 22px 28px 0; scroll-margin-top: calc(var(--sticky-offset, var(--header-height)) + 88px); }
.paper-wrap::before, .paper-wrap::after { content: ""; position: absolute; top: 10px; bottom: -6px; left: 4px; right: 4px; border: 1px solid var(--line); background: var(--paper); border-radius: 3px; z-index: -1; }
.paper-wrap::after { top: 16px; bottom: -11px; left: 9px; right: 9px; z-index: -2; }
.paper-corner { position: absolute; top: -1px; right: -1px; width: 24px; height: 24px; background: linear-gradient(225deg, var(--bg) 47%, var(--line) 49%, var(--surface) 53%, var(--surface) 100%); border-bottom-left-radius: 3px; }
.paper-meta { display: flex; align-items: center; justify-content: space-between; padding: 0 3px 15px; border-bottom: 1px solid var(--line); font-size: 9px; color: var(--faint); letter-spacing: 1.7px; }
.handwriting { touch-action: auto; padding-top: 8px; display: flex; flex-direction: column; gap: 26px; }
.letter-page { animation: page-in .35s ease both; }
.letter-page + .letter-page { border-top: 1px solid var(--line); }
.letter-image { display: block; width: 100%; height: auto; mix-blend-mode: multiply; user-select: none; -webkit-user-select: none; }
:root[data-theme="night"] .letter-image, :root[data-theme="night"] .zoom-image { filter: invert(1); mix-blend-mode: screen; opacity: .87; }
.image-fallback { min-height: 380px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 22px; text-align: center; padding: 22px; color: var(--muted); }
.paper-footnote { display: flex; align-items: center; justify-content: center; gap: 9px; padding: 22px 0 24px; font-size: 10px; color: var(--faint); letter-spacing: 2px; }
.tiny-heart { color: var(--accent); font-size: 18px; line-height: 1; }
.transcript { padding: 30px 18px 0; font-family: var(--serif); font-size: var(--reader-size); line-height: 2.25; letter-spacing: .065em; overflow-wrap: anywhere; }
.transcript h3 { font-size: 1.15em; font-weight: 400; margin-bottom: 24px; }
.transcript > p { text-indent: 2em; margin-bottom: 1.35em; }
.letter-signature { text-align: right; padding: 25px 0 18px; font-size: .92em; }
.letter-signature p { margin-bottom: 6px; }
.signature-date { font-family: Georgia, serif; font-size: .85em; letter-spacing: 1px; }
.guide-highlight { color: var(--accent-dark); background: var(--accent-soft); padding: 2px 6px; border-radius: 4px; font-weight: 600; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.guidance { color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 7px; padding: 13px 16px; font-size: 15px; line-height: 1.9; letter-spacing: .35px; }
.reader-hint { text-align: center; margin: 0 0 22px; }
.text-end { text-align: center; padding-top: 36px; }
.text-link { color: var(--accent-dark); display: inline-flex; align-items: center; gap: 10px; padding: 10px 1px; font-size: 12px; letter-spacing: 1px; border-bottom: 1px solid var(--line); min-height: 42px; }
.text-link:hover { border-bottom-color: var(--accent); }
.text-link .icon { width: 17px; height: 17px; }
.ending { position: relative; isolation: isolate; overflow: hidden; text-align: center; padding: 96px 24px 67px; margin: 20px auto 0; max-width: 1150px; scroll-margin-top: 0; }
.ending-halo { position: absolute; top: 100px; left: 50%; transform: translateX(-50%); width: 580px; height: 480px; background: radial-gradient(ellipse, rgba(216,194,215,.26) 0%, transparent 66%); z-index: -1; pointer-events: none; }
.ending .eyebrow { justify-content: center; font-size: 9px; letter-spacing: 3px; }
.cat-charm { display: block; width: 154px; margin: 29px auto 0; padding: 0; }
.cat-charm svg { display: block; width: 100%; height: auto; overflow: visible; }
.charm-drawing { transform-origin: 100px 5px; }
.cat-charm:hover .charm-drawing { animation: cat-sway 1.3s ease-in-out; }
.cat-charm.is-swaying .charm-drawing { animation: cat-sway 1.3s ease-in-out; }
.cat-tip { font-size: 14px; color: var(--ink); line-height: 1.9; margin-top: 14px; letter-spacing: .3px; }
.cat-whisper { font-family: var(--serif); font-size: 14px; color: var(--muted); letter-spacing: 1px; margin: 13px 0 25px; min-height: 25px; }
.ending h2 { font-family: var(--serif); font-weight: 400; font-size: 38px; letter-spacing: 4px; margin-bottom: 17px; }
.ending-copy { color: var(--muted); font-size: 12px; line-height: 2.2; letter-spacing: 1.5px; }
.wish-button { display: inline-flex; align-items: center; justify-content: center; gap: 11px; min-height: 50px; padding: 12px 26px; margin-top: 28px; border: 1px solid var(--accent); color: var(--accent-dark); background: var(--surface); border-radius: 30px; font-size: 12px; letter-spacing: 1.5px; transition: background .3s, transform .2s; }
.wish-button:hover { background: var(--accent-soft); transform: translateY(-2px); }
.wish-button .icon { width: 17px; height: 17px; stroke-width: 1.3; }
.wish-button[aria-pressed="true"] { background: var(--accent-soft); }
.wish-button[aria-pressed="true"] .icon { fill: var(--accent); stroke: var(--accent); }
.wish-caption { font-size: 10px; color: var(--faint); margin-top: 14px; letter-spacing: 1px; }
.close-letter { margin-top: 45px; color: var(--muted); font-size: 10px; }
.petals { position: absolute; width: min(90%, 550px); height: 440px; left: 50%; top: 170px; transform: translateX(-50%); pointer-events: none; overflow: visible; z-index: -1; }
.petal { position: absolute; width: 9px; height: 14px; border-radius: 80% 0 80% 30%; background: #bda4be; opacity: 0; animation: petal-fall 2.8s ease-in-out both; animation-delay: var(--delay); }
.petal:nth-child(3n) { background: #d7b5a8; width: 7px; height: 11px; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 1180px; margin: 0 auto; padding: 22px 0 max(22px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); color: var(--faint); font-size: 9px; letter-spacing: 1.4px; }
.site-footer .icon { width: 20px; height: 20px; color: var(--accent); stroke-width: 1; }
.site-footer span:last-child { font-family: var(--serif); font-size: 12px; letter-spacing: 2px; }
.zoom-dialog { display: none; margin: auto; padding: 0; border: 1px solid var(--line); border-radius: 10px; width: calc(100vw - 32px); max-width: 1100px; height: calc(100vh - 40px); height: calc(100dvh - 40px); max-height: none; max-width: min(1100px, calc(100vw - 32px)); background: var(--surface); color: var(--ink); box-shadow: 0 24px 120px rgba(20,12,25,.3); overflow: hidden; }
.zoom-dialog[open] { display: block; }
.zoom-dialog::backdrop { background: rgba(34,26,39,.6); backdrop-filter: blur(5px); }
.zoom-dialog.is-fallback { position: fixed; inset: 20px 16px; z-index: 120; box-shadow: 0 0 0 100vmax rgba(34,26,39,.7); }
.dialog-shell { display: flex; flex-direction: column; height: 100%; }
.zoom-header { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 17px 22px; border-bottom: 1px solid var(--line); flex-shrink: 0; }
.zoom-heading h2 { font-family: var(--serif); font-weight: 400; font-size: 17px; letter-spacing: 1px; }
.zoom-heading p { font-size: 14px; color: var(--muted); margin-top: 3px; letter-spacing: .3px; }
.zoom-actions { display: flex; align-items: center; gap: 7px; }
.zoom-reset { min-width: 62px; min-height: 42px; border: 1px solid var(--line); border-radius: 4px; color: var(--accent-dark); font-size: 12px; font-family: Georgia, serif; }
.zoom-viewport { flex: 1; min-width: 0; min-height: 0; overflow: auto; overscroll-behavior: contain; padding: 16px; background: var(--bg); scrollbar-color: var(--accent) var(--surface); touch-action: none; scroll-behavior: auto; overflow-anchor: none; user-select: none; -webkit-user-select: none; cursor: grab; }
.zoom-viewport.is-dragging { cursor: grabbing; }
.zoom-canvas { margin: 0 auto; width: 100%; display: flex; flex-direction: column; gap: 26px; overflow-anchor: none; }
.zoom-sheet { width: 100%; flex: none; background: var(--paper); box-shadow: var(--shadow); }
.zoom-image { display: block; width: 100%; height: auto; mix-blend-mode: multiply; user-select: none; -webkit-user-select: none; -webkit-user-drag: none; }
.zoom-footnote { text-align: center; padding: 13px 16px; font-size: 15px; line-height: 1.9; letter-spacing: .25px; color: var(--ink); border-top: 1px solid var(--line); flex-shrink: 0; background: var(--surface); }
.zoom-footnote > span { display: block; }
.toast { position: fixed; bottom: max(30px, calc(env(safe-area-inset-bottom) + 16px)); left: 50%; transform: translate(-50%, 16px); z-index: 140; max-width: min(420px, calc(100vw - 36px)); width: max-content; background: var(--ink); color: var(--bg); padding: 12px 21px; border-radius: 7px; font-size: 12px; letter-spacing: .5px; text-align: center; opacity: 0; transition: opacity .25s, transform .25s; pointer-events: none; box-shadow: 0 8px 25px rgba(30,20,30,.12); }
.toast.visible { opacity: 1; transform: translate(-50%, 0); }
.noscript-reader { max-width: 760px; margin: 30px auto; padding: 24px; text-align: center; }
.noscript-reader img { display: block; width: 100%; height: auto; margin: 25px 0; }
.noscript-reader a { text-decoration: underline; }
:root[data-theme="night"] .cover-glow { opacity: .14; }
:root[data-theme="night"] .envelope-art { filter: brightness(.78) saturate(.76); }
:root[data-theme="night"] .cat-charm { filter: brightness(.87) saturate(.8); }
:root[data-theme="night"] .ending-halo { opacity: .3; }
:root[data-theme="night"] .primary-button { background: #8c729e; }
:root[data-theme="night"] .primary-button:hover { background: #a389b4; }
@keyframes appear { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes page-in { from { opacity: .25; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@keyframes cat-sway { 0%,100% { transform: rotate(0); } 20% { transform: rotate(-9deg); } 45% { transform: rotate(7deg); } 70% { transform: rotate(-4deg); } 88% { transform: rotate(2deg); } }
@keyframes petal-fall { 0% { opacity: 0; transform: translate(0, -18px) rotate(0); } 20% { opacity: .7; } 100% { opacity: 0; transform: translate(var(--drift), 250px) rotate(var(--spin)); } }
@media (min-width: 1500px) { .cover-content { padding-top: 90px; padding-bottom: 100px; min-height: min(780px, calc(100svh - 190px)); } }
@media (max-width: 1240px) { .cover { padding: 0 40px; } .site-footer { margin: 0 40px; } .margin-note { display: none; } }
@media (max-width: 900px) {
  .site-header { padding-left: 28px; padding-right: 28px; }
  .header-caption { margin-left: 0; }
  .cover { padding: 0 32px; }
  .cover-content { grid-template-columns: 1fr 1fr; gap: 4px; padding: 60px 0; }
  h1 { font-size: clamp(30px, 4.2vw, 40px); }
  .scene-caption { font-size: 11px; left: 3%; }
  .envelope-art { width: 113%; }
  .cover-bottom-label { display: none; }
  .scene-sidenote { font-size: 6px; padding-top: 25px; }
}
@media (max-width: 680px) {
  :root { --header-height: 68px; }
  .site-header { padding-left: 22px; padding-right: 22px; gap: 12px; }
  .brand { font-size: 20px; gap: 8px; }
  .brand-flower { width: 25px; height: 25px; }
  .header-caption { display: none; }
  .header-actions { gap: 8px; }
  .header-read { font-size: 11px; gap: 8px; }
  .header-read .icon { width: 16px; }
  .cover { padding: 0 24px; }
  .cover-content { display: flex; flex-direction: column; gap: 0; padding: 37px 0 21px; min-height: 0; }
  .cover-copy { text-align: center; padding: 0; width: 100%; }
  .cover-copy .eyebrow { justify-content: center; font-size: 8px; letter-spacing: 2.2px; }
  .little-line { width: 19px; }
  h1 { font-size: clamp(30px, 8.7vw, 46px); line-height: 1.6; letter-spacing: 1px; margin: 18px 0 14px; }
  .title-accent svg { height: 12px; bottom: 0; }
  .cover-description { font-size: 12px; line-height: 2; letter-spacing: 1.1px; }
  .primary-button { margin-top: 22px; min-height: 48px; padding-left: 22px; gap: 28px; font-size: 12px; }
  .button-arrow { width: 33px; height: 33px; }
  .opening-note { margin-top: 11px; font-size: 14px; }
  .envelope-scene { max-width: 415px; padding-top: 0; margin-top: 14px; }
  .envelope-art { width: 105%; }
  .scene-caption { top: 15px; left: 9%; font-size: 9px; }
  .floating-flower { top: 22px; right: 6%; width: 24px; height: 24px; }
  .envelope-hint { font-size: 14px; letter-spacing: .3px; margin-top: 0; }
  .scene-sidenote { display: none; }
  .cover-bottom { padding: 21px 0 24px; gap: 12px; flex-wrap: wrap; justify-content: center; }
  .cover-memory { gap: 10px; font-size: 9px; letter-spacing: .7px; }
  .memory-number { font-size: 27px; }
  .cover-quote { font-size: 11px; letter-spacing: .4px; text-align: center; }
  .reader-section { padding: 46px 20px 0; }
  .section-ornament { margin-bottom: 28px; }
  .reader-heading { margin-bottom: 25px; }
  .reader-heading h2 { font-size: 29px; margin-top: 11px; letter-spacing: 2px; }
  .reader-heading .eyebrow { font-size: 8px; letter-spacing: 2px; }
  .reader-heading > p:last-child { font-size: 11px; letter-spacing: .8px; }
  .tiny-flower { font-size: 20px; margin-left: 8px; }
  .reader-tools { gap: 5px; padding: 9px 0 13px; }
  .view-switch { padding: 3px; border-radius: 5px; }
  .view-switch button { padding: 7px 11px; min-height: 35px; font-size: 11px; letter-spacing: 0; }
  .reading-actions { gap: 2px; }
  .tool-button { width: 40px; min-height: 42px; padding: 9px; }
  .tool-button > span { display: none; }
  #zoomButton { width: auto; padding: 9px 8px; gap: 5px; font-size: 13px; }
  #zoomButton > span { display: inline; }
  .tool-button .icon { width: 19px; height: 19px; }
  .font-controls button { min-width: 31px; font-size: 12px; }
  .paper-wrap { padding: 17px 10px 0; }
  .paper-meta { padding: 0 8px 12px; font-size: 8px; letter-spacing: 1px; }
  .paper-corner { width: 18px; height: 18px; }
  .paper-footnote { padding: 16px 0 19px; font-size: 9px; letter-spacing: 1px; }
  .handwriting { padding-top: 7px; }
  .transcript { padding: 25px 13px 0; letter-spacing: .025em; line-height: 2.15; }
  .transcript h3 { margin-bottom: 18px; }
  .letter-signature { padding-top: 12px; font-size: .82em; }
  .guidance { font-size: 14px; padding: 12px 10px; }
  .reader-hint { margin: 0 0 18px; letter-spacing: .2px; }
  .ending { padding: 70px 22px 47px; margin-top: 6px; }
  .ending h2 { font-size: 30px; letter-spacing: 2px; }
  .ending-halo { top: 100px; width: 420px; height: 410px; }
  .cat-charm { width: 142px; margin-top: 24px; }
  .cat-whisper { margin-bottom: 23px; font-size: 14px; letter-spacing: .5px; }
  .ending-copy { font-size: 11px; letter-spacing: 1px; }
  .wish-button { font-size: 11px; min-height: 48px; padding: 11px 23px; }
  .close-letter { margin-top: 34px; }
  .site-footer { margin: 0 24px; gap: 12px; font-size: 7px; letter-spacing: .8px; padding-top: 20px; padding-bottom: max(22px, env(safe-area-inset-bottom)); }
  .site-footer span:last-child { font-size: 10px; }
  .site-footer .icon { width: 16px; height: 16px; }
  .zoom-dialog { width: 100vw; max-width: 100vw; height: 100vh; height: 100dvh; margin: 0; border: 0; border-radius: 0; }
  .zoom-dialog.is-fallback { inset: 0; }
  .zoom-header { padding: max(11px, env(safe-area-inset-top)) 12px 11px; gap: 6px; align-items: center; }
  .zoom-heading h2 { font-size: 14px; letter-spacing: .3px; }
  .zoom-heading p { display: none; }
  .zoom-actions { gap: 2px; }
  .zoom-actions .icon-button { width: 34px; height: 40px; font-size: 22px; }
  .zoom-actions .header-divider { margin: 0 3px; }
  .zoom-reset { min-width: 48px; min-height: 36px; font-size: 13px; }
  .zoom-viewport { padding: 12px; }
  .zoom-footnote { font-size: 14px; letter-spacing: 0; padding: 11px 10px max(11px, env(safe-area-inset-bottom)); }
}
@media (max-width: 360px) {
  .cover { padding: 0 19px; }
  .cover-quote { width: 100%; margin-top: 3px; }
  .reader-section { padding-left: 14px; padding-right: 14px; }
  .view-switch button { padding-left: 9px; padding-right: 9px; }
  .tool-button { width: 35px; }
  .font-controls button { min-width: 28px; }
  .header-actions { gap: 4px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; transition-delay: 0ms !important; }
  .petals { display: none; }
}