/* ==========================================================================
   Cute SS 首页模块样式。
   本文件分段追加：§1 布局+封面（Task 6）/ §2 照片墙（Task 7）/
   §3 信件（Task 8）/ §4 留言板（Task 10）。
   ========================================================================== */

/* ---------- §1 首页布局（内容 + 可编辑侧边栏） ---------- */
.home-main {
	padding-top: 0;
	max-width: none;
}

.home-layout {
	max-width: var(--cute-max-width);
	margin: 0 auto;
	padding: 2.5rem 1rem 0;
	display: grid;
	grid-template-columns: 1fr;
	gap: 2rem;
}

@media (min-width: 960px) {
	.home-layout {
		grid-template-columns: minmax(0, 1fr) 320px;
		align-items: start;
	}
}

.home-layout__content {
	min-width: 0;
	display: grid;
	gap: 3rem;
}

.home-layout__sidebar {
	position: sticky;
	top: 90px;
}

@media (max-width: 959px) {
	.home-layout__sidebar {
		position: static;
	}
}

/* ---------- §1 全屏照片封面 ---------- */
.cute-hero {
	position: relative;
	height: 100vh;
	height: 100dvh; /* 移动端适配浏览器地址栏伸缩 */
	overflow: hidden;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--cute-primary-soft);
}

.cute-hero__bg {
	position: absolute;
	inset: 0;
	background-size: cover;
	background-position: center;
}

.cute-hero__bg::after {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(
		180deg,
		rgba(255, 248, 240, 0.25) 0%,
		rgba(255, 158, 187, 0.18) 60%,
		rgba(255, 158, 187, 0.4) 100%
	);
}

.cute-hero__frame {
	z-index: 2;
	background: rgba(255, 253, 248, 0.92);
	padding: 2.5rem 2rem;
	text-align: center;
	max-width: min(90vw, 560px);
}

.cute-hero__title {
	font-family: var(--cute-font-pixel);
	font-size: clamp(1.1rem, 4vw, 1.9rem);
	line-height: 1.7;
	margin: 0 0 1rem;
}

.cute-hero__subtitle {
	margin: 0;
	font-size: clamp(0.95rem, 2.5vw, 1.15rem);
	color: var(--cute-ink-soft);
}

/* 像素爱心粒子 */
.cute-hero__heart {
	position: absolute;
	z-index: 1;
	color: var(--cute-primary);
	image-rendering: pixelated;
	opacity: 0.9;
	animation: cute-heart-float 6s ease-in-out infinite;
}

.cute-hero__heart--1 { left: 8%;  top: 18%; animation-delay: 0s; }
.cute-hero__heart--2 { left: 18%; top: 64%; animation-delay: 1s; color: var(--cute-accent); }
.cute-hero__heart--3 { left: 78%; top: 22%; animation-delay: 2s; }
.cute-hero__heart--4 { left: 88%; top: 58%; animation-delay: 0.5s; color: var(--cute-accent); }
.cute-hero__heart--5 { left: 50%; top: 10%; animation-delay: 1.5s; width: 18px; height: 16px; }
.cute-hero__heart--6 { left: 32%; top: 36%; animation-delay: 2.5s; width: 18px; height: 16px; color: var(--cute-white); }

@keyframes cute-heart-float {
	0%, 100% { transform: translateY(0); }
	50%      { transform: translateY(-18px); }
}

/* 封面像素小人位置 */
.pixel-sprite--hero {
	position: absolute;
	left: 5%;
	bottom: 6%;
	z-index: 2;
}

/* 向下滚动箭头 */
.cute-hero__arrow {
	position: absolute;
	bottom: 1.75rem;
	left: 50%;
	transform: translateX(-50%);
	z-index: 2;
	color: var(--cute-white);
	background: var(--cute-ink);
	border: 3px solid var(--cute-white);
	border-radius: var(--cute-radius-sm);
	padding: 0.5rem 0.6rem 0.35rem;
	line-height: 0;
	animation: cute-arrow-bounce 1.6s ease-in-out infinite;
}

@keyframes cute-arrow-bounce {
	0%, 100% { transform: translate(-50%, 0); }
	50%      { transform: translate(-50%, 10px); }
}

@media (prefers-reduced-motion: reduce) {
	.cute-hero__heart,
	.cute-hero__arrow {
		animation: none;
	}
}

/* ---------- §2 照片墙：侧边半遮挡画板 ---------- */
.photo-wall {
	position: fixed;
	right: 0;
	top: 50%;
	z-index: 60;
	width: min(420px, 82vw);
	transform: translate(64%, -50%) rotate(2deg);
	transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.photo-wall__board {
	position: relative;
	background: var(--cute-accent-soft);
	padding: 1rem;
	max-height: 70vh;
	overflow-y: auto;
	cursor: pointer;
}

.photo-wall__inner {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 0.75rem;
}

/* 拍立得卡片 */
.photo-wall__item {
	margin: 0;
	background: var(--cute-white);
	border: 2px solid var(--cute-ink);
	padding: 0.35rem 0.35rem 0;
	box-shadow: 2px 2px 0 0 rgba(91, 74, 82, 0.2);
	transform: rotate(-2deg);
	transition: transform 0.2s ease;
	cursor: pointer;
}

.photo-wall__item:nth-child(2n) {
	transform: rotate(2deg);
}

.photo-wall__item:nth-child(3n) {
	transform: rotate(-1deg);
}

.photo-wall__item:hover {
	transform: rotate(0deg) scale(1.04);
}

.photo-wall__item img {
	display: block;
	width: 100%;
	aspect-ratio: 1 / 1;
	object-fit: cover;
}

.photo-wall__caption {
	padding: 0.25rem 0;
	font-size: 0.7rem;
	text-align: center;
	color: var(--cute-ink-soft);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.photo-wall__empty {
	grid-column: 1 / -1;
	margin: 0;
	font-size: 0.85rem;
	text-align: center;
	color: var(--cute-ink-soft);
}

/* 侧边小把手（无 JS 时隐藏） */
.photo-wall__toggle {
	position: absolute;
	left: -2.9rem;
	top: 50%;
	transform: translateY(-50%);
	writing-mode: vertical-rl;
	font-family: var(--cute-font-pixel);
	font-size: 0.65rem;
	letter-spacing: 0.2em;
	color: var(--cute-white);
	background: var(--cute-primary);
	border: 3px solid var(--cute-ink);
	border-right: 0;
	padding: 0.9em 0.6em;
	cursor: pointer;
}

.photo-wall__close {
	position: absolute;
	top: -0.9rem;
	right: -0.9rem;
	z-index: 2;
	width: 2rem;
	height: 2rem;
	line-height: 1;
	font-size: 1.2rem;
	color: var(--cute-white);
	background: var(--cute-ink);
	border: 3px solid var(--cute-white);
	border-radius: 50%;
	cursor: pointer;
}

/* 展开为屏幕中央的完整网格 */
.photo-wall--open {
	left: 50%;
	right: auto;
	width: min(760px, 94vw);
	transform: translate(-50%, -50%) rotate(0deg);
	z-index: 70;
}

.photo-wall--open .photo-wall__board {
	max-height: 80vh;
	cursor: default;
}

.photo-wall--open .photo-wall__inner {
	grid-template-columns: repeat(4, 1fr);
}

.photo-wall-overlay {
	position: fixed;
	inset: 0;
	z-index: 65;
	background: rgba(91, 74, 82, 0.45);
}

/* lightbox 大图 */
.photo-wall-lightbox {
	position: fixed;
	inset: 0;
	z-index: 80;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(91, 74, 82, 0.78);
}

.photo-wall-lightbox[hidden] {
	display: none;
}

.photo-wall-lightbox__figure {
	margin: 0;
	text-align: center;
}

.photo-wall-lightbox__figure img {
	max-width: 90vw;
	max-height: 80vh;
	border: 3px solid var(--cute-white);
	background: var(--cute-white);
	padding: 0.5rem;
}

.photo-wall-lightbox__caption {
	margin-top: 0.5rem;
	color: var(--cute-white);
	font-size: 0.9rem;
}

.photo-wall-lightbox__close {
	position: absolute;
	top: 1rem;
	right: 1rem;
	width: 2.5rem;
	height: 2.5rem;
	font-size: 1.5rem;
	line-height: 1;
	color: var(--cute-white);
	background: var(--cute-ink);
	border: 3px solid var(--cute-white);
	border-radius: 50%;
	cursor: pointer;
}

/* 展开时锁定背景滚动 */
body.photo-wall-locked {
	overflow: hidden;
}

/* 无 JS 降级：页面内普通照片网格 */
.no-js .photo-wall {
	position: static;
	width: 100%;
	transform: none;
}

.no-js .photo-wall__board {
	max-height: none;
	cursor: default;
}

.no-js .photo-wall__toggle,
.no-js .photo-wall__close,
.no-js .photo-wall-overlay,
.no-js .photo-wall-lightbox {
	display: none;
}

/* 移动端：底部半遮挡抽屉 */
@media (max-width: 720px) {
	.photo-wall {
		top: auto;
		bottom: 0;
		left: 0;
		right: 0;
		width: 100%;
		transform: translateY(62%);
	}

	.photo-wall--open {
		left: 0;
		width: 100%;
		transform: translateY(0);
	}

	.photo-wall--open .photo-wall__board {
		max-height: 82dvh;
	}

	.photo-wall--open .photo-wall__inner {
		grid-template-columns: repeat(3, 1fr);
	}

	.photo-wall__toggle {
		left: 50%;
		top: -2.7rem;
		transform: translateX(-50%);
		writing-mode: horizontal-tb;
		border: 3px solid var(--cute-ink);
		border-bottom: 0;
	}
}

@media (prefers-reduced-motion: reduce) {
	.photo-wall,
	.photo-wall__item {
		transition: none;
	}
}

/* ---------- §3 信封信件区 ---------- */
.letters__stage {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 3.5rem;
	padding: 2rem 0 1rem;
}

/* CSS 绘制的像素风信封 */
.envelope {
	position: relative;
	width: min(340px, 86vw);
	height: 220px;
	cursor: pointer;
	outline-offset: 4px;
}

.envelope__back {
	position: absolute;
	inset: 0;
	background: var(--cute-primary);
	border: 3px solid var(--cute-ink);
}

/* 信纸：闭合态为 30% 高的折叠条，藏于前袋后不可见。
   定位位移一律用独立的 translate 属性而非 transform——
   FLIP 的 WAAPI 动画会覆盖 transform，若居中/抽出用 transform 实现，
   动画播放期间该位移被抹掉、结束时又跳回，造成"两段位移"。 */
.envelope__paper {
	position: absolute;
	left: 6%;
	right: 6%;
	top: 8%;
	height: 30%;
	z-index: 2;
	background: var(--cute-paper);
	border: 3px solid var(--cute-ink);
	padding: 0.75rem;
	overflow: hidden;
	translate: 0 0;
	transition: translate 0.45s ease, height 0.45s ease, padding 0.45s ease;
}

/* 抽出同时“展开”：height 30% → 84%，translate 0 → -46%，同基准平滑过渡 */
.envelope--paper-out .envelope__paper {
	height: 84%;
	translate: 0 -46%;
}

.envelope--paper-full {
	cursor: default;
}

/* 展开态：视口居中（居中使用独立的 translate 属性，不会被 FLIP 的 transform 动画覆盖）。
   几何变化全部由 envelope.js 的 FLIP(WAAPI) 平滑，transition 关闭防打架 */
.envelope--paper-full .envelope__paper {
	position: fixed;
	left: 50%;
	right: auto;
	top: 50%;
	width: min(560px, 92vw);
	height: auto;
	max-height: 72dvh;
	padding: 1.25rem;
	overflow-y: auto;
	translate: -50% -50%;
	z-index: 80;
	box-shadow: var(--cute-px-shadow);
	transition: none;
}

/* 信封前袋 */
.envelope__front {
	position: absolute;
	inset: 0;
	z-index: 3;
	background: var(--cute-primary-soft);
	border: 3px solid var(--cute-ink);
	clip-path: polygon(0 0, 50% 46%, 100% 0, 100% 100%, 0 100%);
}

/* 信封盖 */
.envelope__flap {
	position: absolute;
	left: 0;
	right: 0;
	top: 0;
	height: 52%;
	z-index: 4;
	background: var(--cute-primary);
	border: 3px solid var(--cute-ink);
	clip-path: polygon(0 0, 100% 0, 50% 100%);
	transform-origin: top center;
	transition: transform 0.45s ease;
}

.envelope--open .envelope__flap {
	transform: rotateX(180deg);
	z-index: 1;
}

/* 开启提示 */
.envelope__hint {
	position: absolute;
	bottom: -3rem;
	left: 50%;
	transform: translateX(-50%);
	white-space: nowrap;
	pointer-events: none;
}

.envelope--paper-full .envelope__hint {
	visibility: hidden;
}

/* 信纸内容：手写体 + 逐段淡入 */
.envelope__letter-content,
.cute-hand {
	font-family: var(--cute-font-hand);
	font-size: 1.2rem;
	line-height: 1.9;
}

.envelope__letter-title {
	font-size: 1.3rem;
	margin: 0 0 0.75em;
}

.envelope--paper-full .envelope__letter-content > * {
	animation: cute-letter-fade 0.5s ease both;
}

.envelope--paper-full .envelope__letter-content > *:nth-child(2) { animation-delay: 0.25s; }
.envelope--paper-full .envelope__letter-content > *:nth-child(3) { animation-delay: 0.5s; }
.envelope--paper-full .envelope__letter-content > *:nth-child(4) { animation-delay: 0.75s; }
.envelope--paper-full .envelope__letter-content > *:nth-child(5) { animation-delay: 1s; }
.envelope--paper-full .envelope__letter-content > *:nth-child(6) { animation-delay: 1.25s; }
.envelope--paper-full .envelope__letter-content > *:nth-child(7) { animation-delay: 1.5s; }
.envelope--paper-full .envelope__letter-content > *:nth-child(8) { animation-delay: 1.75s; }

@keyframes cute-letter-fade {
	from { opacity: 0; transform: translateY(8px); }
	to   { opacity: 1; transform: translateY(0); }
}

/* 多封切换 */
.letters__nav {
	display: flex;
	align-items: center;
	gap: 1rem;
}

.letters__counter {
	font-family: var(--cute-font-pixel);
	font-size: 0.7rem;
	color: var(--cute-ink-soft);
}

/* 无 JS 降级 / 信件源列表 */
.letters__list {
	display: grid;
	gap: 1.5rem;
}

.letters__list[hidden] {
	display: none;
}

.no-js .letters__stage {
	display: none;
}

.letters__item {
	padding: 1.5rem;
}

.letters__item-title {
	margin: 0 0 0.5em;
	font-size: 1.1rem;
}

.letters__empty {
	margin: 0;
	color: var(--cute-ink-soft);
	font-size: 0.9rem;
}

.envelope--sealed {
	cursor: default;
}

@media (prefers-reduced-motion: reduce) {
	.envelope__flap,
	.envelope__paper {
		transition: none;
	}
}

/* ---------- §4 留言板 ---------- */
.guestbook__form {
	padding: 1.5rem;
	margin-bottom: 2rem;
}

.guestbook__field {
	margin: 0 0 1rem;
}

.guestbook__field label {
	display: block;
	font-size: 0.85rem;
	margin-bottom: 0.3em;
}

.guestbook__captcha-q {
	font-family: var(--cute-font-pixel);
	font-size: 0.8rem;
	color: var(--cute-primary);
	background: var(--cute-white);
	border: 2px solid var(--cute-ink);
	border-radius: var(--cute-radius-sm);
	padding: 0.2em 0.5em;
}

.guestbook__field--captcha input {
	max-width: 140px;
}

/* 蜜罐：对人不可见 */
.guestbook__hp {
	position: absolute;
	left: -9999px;
	top: -9999px;
	width: 1px;
	height: 1px;
	overflow: hidden;
	margin: 0;
}

.guestbook__actions {
	margin: 0;
}

.guestbook__error,
.guestbook__notice {
	margin: 0 0 1rem;
	padding: 0.75em 1em;
	border: 3px solid var(--cute-ink);
	border-radius: var(--cute-radius-sm);
	font-size: 0.9rem;
}

.guestbook__error {
	background: #ffe3ec;
	color: var(--cute-danger);
}

.guestbook__notice {
	background: var(--cute-accent-soft);
	color: var(--cute-success);
}

.guestbook__list {
	display: grid;
	gap: 1.25rem;
}

/* 像素气泡 */
.guestbook__item {
	padding: 1rem 1.25rem;
	border-radius: var(--cute-radius);
}

.guestbook__item:nth-child(2n) {
	background: var(--cute-primary-soft);
}

.guestbook__item-head {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	justify-content: space-between;
	gap: 0.5em;
	margin-bottom: 0.4em;
}

.guestbook__item-name {
	font-weight: 700;
}

.guestbook__item-time {
	font-size: 0.75rem;
	color: var(--cute-ink-soft);
}

.guestbook__item-body {
	font-size: 0.95rem;
}

.guestbook__item-body p {
	margin: 0 0 0.5em;
}

.guestbook__empty {
	margin: 0;
	text-align: center;
	color: var(--cute-ink-soft);
}

.guestbook__more-wrap {
	text-align: center;
	margin: 1.5rem 0 0;
}


/* ---------- §5 首页最新文章 + 信封塞回按钮 ---------- */
.home-posts__title {
	margin: 2rem 0 1.25rem;
	text-align: left;
}

.home-posts__grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: var(--cute-gap);
	text-align: left;
}

@media (max-width: 719px) {
	.home-posts__grid {
		grid-template-columns: 1fr;
	}
}

.home-posts {
	text-align: center;
}

/* 信封展开后的「塞回信封」按钮 */
.envelope__seal-back {
	display: block;
	margin: 1rem auto 0;
}

.envelope__seal-back[hidden] {
	display: none;
}

/* ---------- §6 首页侧边栏置顶文章 ---------- */
.sticky-posts {
	display: grid;
	gap: 1rem;
}

.sticky-post {
	padding: 1rem 1.25rem;
	text-align: left;
}

.sticky-post__title {
	margin: 0 0 0.75rem;
	font-size: 1.05rem;
}

.sticky-post__content {
	font-size: 0.95rem;
}

.sticky-post__content p {
	margin: 0 0 0.5em;
}

.sticky-post__content img {
	max-width: 100%;
	height: auto;
}