/* ==========================================================================
   基础层：重置、排版、表单、WordPress 核心类
   ========================================================================== */

*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	-webkit-text-size-adjust: 100%;
	text-size-adjust: 100%;
	scroll-behavior: smooth;
	/* 顶部导航是固定定位，锚点跳转时留出空间避免标题被盖住 */
	scroll-padding-top: 96px;
	/* 横向裁剪放在 html 上而不是 body：
	   html 的 overflow 会传播给视口，不会额外制造滚动容器；
	   而 body 上的 overflow-x:hidden 会把 overflow-y 计算成 auto，
	   反而多出一个滚动容器，还会破坏 sticky 定位。 */
	overflow-x: hidden;
}

body {
	margin: 0;
	min-height: 100vh;
	background-color: var(--tide-bg);
	color: var(--tide-text);
	font-family: var(--tide-font);
	font-size: var(--tide-fs-base);
	line-height: 1.75;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	transition: background-color var(--tide-dur) var(--tide-ease),
		color var(--tide-dur) var(--tide-ease);
}

/* 页面底部的两团柔光，是「鸣潮」式氛围的关键：
   纯 CSS 径向渐变，不消耗任何额外网络请求，也不占 JS 性能。 */
body::before {
	content: "";
	position: fixed;
	inset: 0;
	z-index: var(--tide-z-bg);
	pointer-events: none;
	background:
		radial-gradient(58vw 46vw at 12% -6%, rgba(var(--tide-accent-rgb), 0.14), transparent 62%),
		radial-gradient(52vw 42vw at 92% 4%, rgba(var(--tide-accent-2-rgb), 0.13), transparent 60%),
		radial-gradient(70vw 60vw at 50% 108%, rgba(var(--tide-accent-rgb), 0.08), transparent 65%);
	opacity: calc(0.65 + 0.35 * var(--tide-glow));
	transition: background var(--tide-dur) var(--tide-ease);
}

:root[data-tide-mode="light"] body::before {
	background:
		radial-gradient(58vw 46vw at 10% -8%, rgba(var(--tide-accent-rgb), 0.18), transparent 60%),
		radial-gradient(52vw 42vw at 94% 2%, rgba(var(--tide-accent-2-rgb), 0.14), transparent 58%);
	opacity: 0.9;
}

/* 颗粒噪点：用内联 SVG 生成，不产生额外请求 */
body.tide-has-noise::after {
	content: "";
	position: fixed;
	inset: -50%;
	z-index: var(--tide-z-bg);
	pointer-events: none;
	opacity: 0.028;
	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='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
	animation: tide-noise-shift 8s steps(6) infinite;
}

:root[data-tide-mode="light"] body.tide-has-noise::after {
	opacity: 0.016;
}

/* --------------------------------------------------------------------------
   排版
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
	margin: 0 0 var(--tide-sp-4);
	font-family: var(--tide-font-display);
	font-weight: 700;
	line-height: 1.28;
	letter-spacing: -0.01em;
	color: var(--tide-text);
	text-wrap: balance;
}

h1 { font-size: var(--tide-fs-3xl); }
h2 { font-size: var(--tide-fs-2xl); }
h3 { font-size: var(--tide-fs-xl); }
h4 { font-size: var(--tide-fs-lg); }
h5 { font-size: var(--tide-fs-md); }
h6 { font-size: var(--tide-fs-base); }

p {
	margin: 0 0 var(--tide-sp-5);
	text-wrap: pretty;
}

a {
	color: var(--tide-accent);
	text-decoration: none;
	transition: color var(--tide-dur-fast) var(--tide-ease),
		opacity var(--tide-dur-fast) var(--tide-ease);
}

a:hover {
	color: var(--tide-accent-2);
}

img,
svg,
video,
iframe {
	max-width: 100%;
	height: auto;
	vertical-align: middle;
}

img {
	border-style: none;
}

figure {
	margin: 0 0 var(--tide-sp-5);
}

hr {
	height: 1px;
	margin: var(--tide-sp-7) 0;
	border: 0;
	background: linear-gradient(90deg, transparent, var(--tide-border-strong), transparent);
}

strong,
b {
	font-weight: 700;
	color: var(--tide-text);
}

small {
	font-size: var(--tide-fs-sm);
}

::selection {
	background: rgba(var(--tide-accent-rgb), 0.3);
	color: var(--tide-text);
}

/* 焦点可见性：键盘用户必须看得见当前焦点 */
:focus-visible {
	outline: 2px solid var(--tide-accent);
	outline-offset: 3px;
	border-radius: 4px;
}

/* 屏蔽鼠标点击时的焦点圈，避免影响观感 */
:focus:not(:focus-visible) {
	outline: none;
}

/* --------------------------------------------------------------------------
   列表
   -------------------------------------------------------------------------- */

ul,
ol {
	margin: 0 0 var(--tide-sp-5);
	padding-left: 1.4em;
}

li {
	margin-bottom: var(--tide-sp-2);
}

li > ul,
li > ol {
	margin-top: var(--tide-sp-2);
	margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   引用与代码
   -------------------------------------------------------------------------- */

blockquote {
	position: relative;
	margin: var(--tide-sp-6) 0;
	padding: var(--tide-sp-5) var(--tide-sp-5) var(--tide-sp-5) var(--tide-sp-6);
	border-left: 2px solid var(--tide-accent);
	border-radius: 0 var(--tide-radius-sm) var(--tide-radius-sm) 0;
	background: linear-gradient(90deg, rgba(var(--tide-accent-rgb), 0.09), transparent 70%);
	color: var(--tide-muted);
	font-style: normal;
}

blockquote p:last-child {
	margin-bottom: 0;
}

blockquote cite {
	display: block;
	margin-top: var(--tide-sp-3);
	color: var(--tide-muted);
	font-size: var(--tide-fs-sm);
	font-style: normal;
	opacity: 0.75;
}

code,
kbd,
samp {
	font-family: var(--tide-font-mono);
	font-size: 0.9em;
}

:not(pre) > code {
	padding: 0.15em 0.42em;
	border: 1px solid var(--tide-border);
	border-radius: 6px;
	background: var(--tide-surface-2);
	color: var(--tide-accent);
	word-break: break-word;
}

pre {
	position: relative;
	margin: var(--tide-sp-6) 0;
	padding: var(--tide-sp-5);
	border: 1px solid var(--tide-border);
	border-radius: var(--tide-radius);
	background: rgba(0, 0, 0, 0.36);
	overflow-x: auto;
	overscroll-behavior-x: contain;
	-webkit-overflow-scrolling: touch;
}

:root[data-tide-mode="light"] pre {
	background: rgba(14, 24, 42, 0.045);
}

pre code {
	display: block;
	padding: 0;
	border: 0;
	background: none;
	color: inherit;
	font-size: var(--tide-fs-sm);
	line-height: 1.7;
	white-space: pre;
	tab-size: 4;
}

kbd {
	padding: 0.12em 0.45em;
	border: 1px solid var(--tide-border-strong);
	border-bottom-width: 2px;
	border-radius: 6px;
	background: var(--tide-surface-2);
	font-size: var(--tide-fs-xs);
}

/* 自定义滚动条，避免系统默认样式破坏整体观感 */
* {
	scrollbar-width: thin;
	scrollbar-color: rgba(var(--tide-accent-rgb), 0.4) transparent;
}

::-webkit-scrollbar {
	width: 10px;
	height: 10px;
}

::-webkit-scrollbar-track {
	background: transparent;
}

::-webkit-scrollbar-thumb {
	border: 3px solid transparent;
	border-radius: 99px;
	background: rgba(var(--tide-accent-rgb), 0.34);
	background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
	background: rgba(var(--tide-accent-rgb), 0.6);
	background-clip: content-box;
}

/* --------------------------------------------------------------------------
   表格
   -------------------------------------------------------------------------- */

table {
	width: 100%;
	margin: var(--tide-sp-6) 0;
	border-collapse: collapse;
	font-size: var(--tide-fs-sm);
}

th,
td {
	padding: var(--tide-sp-3) var(--tide-sp-4);
	border: 1px solid var(--tide-border);
	text-align: left;
}

th {
	background: var(--tide-surface-2);
	font-weight: 600;
	color: var(--tide-text);
}

tbody tr {
	transition: background-color var(--tide-dur-fast) var(--tide-ease);
}

tbody tr:hover {
	background: var(--tide-surface);
}

/* --------------------------------------------------------------------------
   表单
   -------------------------------------------------------------------------- */

input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="tel"],
input[type="date"],
select,
textarea {
	width: 100%;
	padding: 0.68em 0.9em;
	border: 1px solid var(--tide-border);
	border-radius: var(--tide-radius-sm);
	background: var(--tide-surface-2);
	color: var(--tide-text);
	font-family: inherit;
	font-size: var(--tide-fs-base);
	line-height: 1.5;
	transition: border-color var(--tide-dur-fast) var(--tide-ease),
		box-shadow var(--tide-dur-fast) var(--tide-ease),
		background-color var(--tide-dur-fast) var(--tide-ease);
}

input::placeholder,
textarea::placeholder {
	color: var(--tide-muted);
	opacity: 0.65;
}

input:focus,
select:focus,
textarea:focus {
	outline: none;
	border-color: var(--tide-border-accent);
	background: var(--tide-surface-3);
	box-shadow: 0 0 0 4px rgba(var(--tide-accent-rgb), 0.12);
}

textarea {
	min-height: 9rem;
	resize: vertical;
}

label {
	display: inline-block;
	margin-bottom: var(--tide-sp-2);
	font-size: var(--tide-fs-sm);
	color: var(--tide-muted);
}

button,
input[type="submit"],
input[type="button"] {
	font-family: inherit;
}

/* --------------------------------------------------------------------------
   无障碍与工具类
   -------------------------------------------------------------------------- */

.screen-reader-text {
	position: absolute !important;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	border: 0;
	clip: rect(0 0 0 0);
	clip-path: inset(50%);
	overflow: hidden;
	white-space: nowrap;
	word-wrap: normal;
}

.screen-reader-text:focus {
	position: fixed !important;
	top: 12px;
	left: 12px;
	z-index: 200;
	width: auto;
	height: auto;
	padding: 0.7em 1.2em;
	clip: auto;
	clip-path: none;
	border-radius: var(--tide-radius-sm);
	background: var(--tide-accent);
	color: #05070d;
	font-size: var(--tide-fs-sm);
	font-weight: 600;
}

.tide-skip-link {
	position: absolute;
	top: -100px;
	left: 1rem;
	z-index: 200;
	padding: 0.7em 1.2em;
	border-radius: 0 0 var(--tide-radius-sm) var(--tide-radius-sm);
	background: var(--tide-accent);
	color: #05070d;
	font-weight: 600;
	transition: top var(--tide-dur) var(--tide-ease);
}

.tide-skip-link:focus {
	top: 0;
	color: #05070d;
}

/* --------------------------------------------------------------------------
   布局容器
   -------------------------------------------------------------------------- */

.tide-container {
	width: 100%;
	max-width: var(--tide-container);
	margin-inline: auto;
	padding-inline: clamp(1rem, 4vw, 2.5rem);
}

.tide-container--narrow {
	max-width: 860px;
}

.tide-container--wide {
	max-width: calc(var(--tide-container) + 160px);
}

/* --------------------------------------------------------------------------
   WordPress 核心类
   -------------------------------------------------------------------------- */

.alignleft {
	float: left;
	margin: 0.35em var(--tide-sp-5) var(--tide-sp-4) 0;
}

.alignright {
	float: right;
	margin: 0.35em 0 var(--tide-sp-4) var(--tide-sp-5);
}

.aligncenter {
	display: block;
	margin-inline: auto;
}

.alignwide {
	width: min(1100px, calc(100vw - 3rem));
	max-width: none;
	margin-inline: calc(50% - min(1100px, calc(100vw - 3rem)) / 2);
}

.alignfull {
	width: 100vw;
	max-width: none;
	margin-inline: calc(50% - 50vw);
}

.wp-caption {
	max-width: 100%;
	margin-bottom: var(--tide-sp-5);
}

.wp-caption-text,
.wp-element-caption,
figcaption {
	margin-top: var(--tide-sp-2);
	color: var(--tide-muted);
	font-size: var(--tide-fs-sm);
	text-align: center;
}

.gallery {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
	gap: var(--tide-sp-3);
	margin-bottom: var(--tide-sp-5);
}

.gallery-item {
	margin: 0;
}

.gallery-item img {
	width: 100%;
	border-radius: var(--tide-radius-sm);
	transition: transform var(--tide-dur) var(--tide-ease-out),
		box-shadow var(--tide-dur) var(--tide-ease);
}

.gallery-item a:hover img {
	transform: scale(1.03);
	box-shadow: var(--tide-glow-mid);
}

.sticky {
	position: relative;
}

.sticky::before {
	content: "";
	position: absolute;
	inset-inline-start: 0;
	top: 12%;
	bottom: 12%;
	width: 3px;
	border-radius: 99px;
	background: var(--tide-gradient);
}

.bypostauthor > .comment-body .comment-author .fn::after {
	content: "作者";
	display: inline-block;
	margin-inline-start: 0.5em;
	padding: 0.1em 0.5em;
	border-radius: 99px;
	background: rgba(var(--tide-accent-rgb), 0.16);
	color: var(--tide-accent);
	font-size: var(--tide-fs-xs);
	vertical-align: middle;
}

.wp-block-button__link,
.wp-element-button {
	border-radius: var(--tide-radius-sm);
	transition: transform var(--tide-dur-fast) var(--tide-ease-spring),
		box-shadow var(--tide-dur) var(--tide-ease);
}

.wp-block-button__link:hover,
.wp-element-button:hover {
	transform: translateY(-2px);
	box-shadow: var(--tide-glow-soft);
}

.wp-block-quote,
.wp-block-pullquote {
	border-color: var(--tide-border-accent);
}

.wp-block-table table {
	border-color: var(--tide-border);
}

.wp-block-separator {
	border-color: var(--tide-border);
}

.wp-block-image img {
	border-radius: var(--tide-radius);
}

.wp-block-cover {
	border-radius: var(--tide-radius);
	overflow: hidden;
}

.wp-block-preformatted,
.wp-block-code {
	padding: var(--tide-sp-5);
	border: 1px solid var(--tide-border);
	border-radius: var(--tide-radius);
	background: rgba(0, 0, 0, 0.3);
}

/* --------------------------------------------------------------------------
   打印：去掉所有装饰，只留正文
   -------------------------------------------------------------------------- */

@media print {
	body::before,
	body::after,
	.tide-header,
	.tide-footer,
	.tide-progress,
	.tide-top,
	.tide-cursor,
	.tide-drawer,
	.tide-share,
	.tide-toc {
		display: none !important;
	}

	body {
		background: #fff;
		color: #000;
	}

	.tide-container {
		max-width: 100%;
		padding: 0;
	}
}