/*
 * qq-fx.css —— 首页 / 登录页的动效与氛围层
 * ---------------------------------------------------------------------------
 * 加载顺序：theme-qq-*.css → index.css → qq-ui.css → qq-fx.css（本文件）
 * 因此这里的规则可以放心覆盖前面几层，且全部走 --color-* 变量，深浅色自动跟随。
 *
 * 结构：
 *   1. 全局氛围（只在 body.qq-fx-active 下生效）：粒子画布 + 两团缓慢漂移的光雾
 *   2. 首页 hero：旋转光环 + 渐变标题 + 打字口号 + 鼠标光斑
 *   3. 首页三卡：毛玻璃 + 悬停抬升 + 顶部渐变细线
 *   4. 登录页：整块毛玻璃卡片 + 渐变描边 + 输入框聚焦光晕 + 按钮流光
 *   5. 无障碍：prefers-reduced-motion 全关
 */

/* =========================================================================
   1. 全局氛围
   ========================================================================= */
html {
	background-color: var(--color-body);
}

body.qq-fx-active {
	position: relative;
	min-height: 100vh;
	overflow-x: hidden;
	background-color: var(--color-body);
}

#qq-fx-canvas {
	position: fixed;
	inset: 0;
	width: 100%;
	height: 100%;
	z-index: 0;
	pointer-events: none;
	opacity: 0.9;
}

/* 两团极慢漂移的光雾，给纯白/纯黑背景一点体积感 */
body.qq-fx-active::before,
body.qq-fx-active::after {
	content: "";
	position: fixed;
	z-index: 0;
	pointer-events: none;
	border-radius: 50%;
	filter: blur(70px);
	opacity: 0.55;
	will-change: transform;
}

body.qq-fx-active::before {
	width: 46vw;
	height: 46vw;
	left: -12vw;
	top: -14vw;
	background: radial-gradient(circle at 50% 50%,
		color-mix(in srgb, var(--color-primary) 30%, transparent) 0%,
		transparent 68%);
	animation: qq-drift-a 26s ease-in-out infinite;
}

body.qq-fx-active::after {
	width: 40vw;
	height: 40vw;
	right: -10vw;
	bottom: -12vw;
	background: radial-gradient(circle at 50% 50%,
		color-mix(in srgb, #38BDF8 26%, transparent) 0%,
		transparent 70%);
	animation: qq-drift-b 32s ease-in-out infinite;
}

/* 内容压在氛围层之上 */
body.qq-fx-active > .full.height,
body.qq-fx-active .page {
	position: relative;
	z-index: 1;
}

@keyframes qq-drift-a {
	0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
	50% { transform: translate3d(6vw, 5vw, 0) scale(1.12); }
}

@keyframes qq-drift-b {
	0%, 100% { transform: translate3d(0, 0, 0) scale(1.05); }
	50% { transform: translate3d(-5vw, -4vw, 0) scale(0.94); }
}

/* =========================================================================
   2. 首页 hero
   ========================================================================= */
.page-content.home.qq-home {
	padding-top: 6vh;
}

.qq-hero {
	position: relative;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 10px;
	padding: 2vh 0 5vh;
	text-align: center;
	--qq-mx: 50%;
	--qq-my: 40%;
}

/* 鼠标光斑（JS 只改两个变量） */
.qq-hero::before {
	content: "";
	position: absolute;
	inset: -8% -20%;
	z-index: -1;
	pointer-events: none;
	background: radial-gradient(320px circle at var(--qq-mx) var(--qq-my),
		color-mix(in srgb, var(--color-primary) 16%, transparent),
		transparent 62%);
	transition: background 0.12s linear;
}

/* 光晕：静态柔光，不旋转（QQ 反馈「这一圈光在转圈圈没必要」） */
.qq-logo-halo {
	position: relative;
	width: 172px;
	height: 172px;
	display: grid;
	place-items: center;
	margin-bottom: 16px;
}

.qq-logo-halo::before {
	content: "";
	position: absolute;
	inset: -18px;
	border-radius: 50%;
	background: radial-gradient(
		circle at 50% 50%,
		color-mix(in srgb, var(--color-primary) 34%, transparent) 0%,
		color-mix(in srgb, var(--color-primary) 15%, transparent) 46%,
		transparent 72%
	);
	filter: blur(14px);
	opacity: 0.9;
}

/* 不再画细描边圆环：只留柔光，避免「一圈光」的观感 */
.qq-logo-halo::after {
	content: none;
}

.qq-logo-halo .logo {
	width: 152px;
	height: 152px;
	border-radius: 50%;
	animation: qq-breathe 7s ease-in-out infinite;
}

@keyframes qq-breathe {
	0%, 100% { transform: translateY(0) scale(1); }
	50% { transform: translateY(-5px) scale(1.02); }
}

/* 渐变标题：字色随背景流动 */
.qq-hero-title {
	margin: 0;
	font-size: clamp(38px, 6.2vw, 66px);
	font-weight: 800;
	line-height: 1.1;
	letter-spacing: -0.02em;
	background: linear-gradient(100deg,
		var(--color-text) 6%,
		var(--color-primary) 38%,
		#38BDF8 62%,
		var(--color-text) 94%);
	background-size: 240% 100%;
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
	-webkit-text-fill-color: transparent;
	animation: qq-shimmer 9s ease-in-out infinite;
}

@keyframes qq-shimmer {
	0%, 100% { background-position: 0% 50%; }
	50% { background-position: 100% 50%; }
}

/* 口号 + 光标 */
.qq-hero-tag {
	min-height: 1.6em;
	margin: 2px 0 0;
	font-size: 15px;
	letter-spacing: 0.04em;
	color: var(--color-text-light-2);
}

.qq-hero-tag.qq-typing::after,
.qq-hero-tag.qq-typed::after {
	content: "▌";
	margin-left: 2px;
	color: var(--color-primary);
	animation: qq-caret 1.1s step-end infinite;
}

@keyframes qq-caret {
	0%, 49% { opacity: 1; }
	50%, 100% { opacity: 0; }
}

/* =========================================================================
   3. 首页三卡
   ========================================================================= */
.qq-home-cards {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 16px;
	max-width: 980px;
	margin: 0 auto;
	padding: 0 0 9vh;
}

.qq-home-card {
	position: relative;
	padding: 20px 22px;
	border: 1px solid var(--color-secondary);
	border-radius: 16px;
	background: color-mix(in srgb, var(--color-box-body) 72%, transparent);
	backdrop-filter: blur(14px);
	-webkit-backdrop-filter: blur(14px);
	overflow: hidden;
	transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1),
		border-color 0.3s ease, box-shadow 0.3s ease;
}

/* 悬停时从顶部扫过的一条渐变细线 */
.qq-home-card::after {
	content: "";
	position: absolute;
	left: 0;
	top: 0;
	height: 2px;
	width: 100%;
	background: linear-gradient(90deg, transparent, var(--color-primary), #38BDF8, transparent);
	transform: scaleX(0);
	transform-origin: left center;
	transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.qq-home-card:hover {
	transform: translateY(-6px);
	border-color: color-mix(in srgb, var(--color-primary) 45%, transparent);
	box-shadow: 0 20px 44px -22px color-mix(in srgb, var(--color-primary) 60%, transparent);
}

.qq-home-card:hover::after {
	transform: scaleX(1);
}

.qq-home-card h3 {
	margin: 0 0 8px;
	font-size: 15px;
	font-weight: 600;
	display: flex;
	align-items: center;
	gap: 8px;
	color: var(--color-text);
}

.qq-home-card h3 svg {
	color: var(--color-primary);
}

.qq-home-card p {
	margin: 0;
	font-size: 13px;
	line-height: 1.75;
	color: var(--color-text-light-2);
}

/* =========================================================================
   4. 登录页
   ========================================================================= */
.page-content.user.signin .ui.middle.very.relaxed.page.grid {
	margin-top: 5vh;
}

.page-content.user.signin .ui.container.column.fluid {
	position: relative;
	width: 100%;
	max-width: 560px;
	margin: 0 auto;
	padding: 0;
}

/* 卡片外发光 */
.page-content.user.signin .ui.container.column.fluid::before {
	content: "";
	position: absolute;
	inset: -2px;
	z-index: -1;
	border-radius: 22px;
	background: linear-gradient(135deg,
		color-mix(in srgb, var(--color-primary) 55%, transparent),
		transparent 45%,
		color-mix(in srgb, #38BDF8 45%, transparent));
	filter: blur(14px);
	opacity: 0.5;
}

/* 顶部标题：从「贴附表头」变成卡片标题 */
.page-content.user.signin h4.ui.top.attached.header.center {
	margin: 0;
	padding: 26px 0 10px;
	border: 1px solid var(--color-secondary);
	border-bottom: 0;
	border-radius: 18px 18px 0 0;
	background: color-mix(in srgb, var(--color-box-body) 78%, transparent);
	backdrop-filter: blur(18px);
	-webkit-backdrop-filter: blur(18px);
	font-size: 20px;
	font-weight: 700;
	letter-spacing: 0.06em;
	color: var(--color-text);
}

/* 表单主体：毛玻璃卡片 */
.page-content.user.signin .ui.attached.segment {
	margin: 0;
	padding: 18px 24px 26px;
	border: 1px solid var(--color-secondary);
	border-top: 0;
	border-radius: 0 0 18px 18px;
	background: color-mix(in srgb, var(--color-box-body) 78%, transparent);
	backdrop-filter: blur(18px);
	-webkit-backdrop-filter: blur(18px);
	box-shadow: 0 30px 70px -40px color-mix(in srgb, var(--color-primary) 75%, transparent);
	font-size: 13px;
}

/* 登录/注册/OpenID 三个页签，收成卡片顶部的一条 */
.page-content.user.signin .new-menu.navbar {
	margin: 0 auto;
	max-width: 560px;
	border-bottom: 1px solid var(--color-secondary);
	background: transparent;
}

.page-content.user.signin .new-menu.navbar .item {
	padding: 10px 14px;
	font-size: 13px;
	border-radius: 8px 8px 0 0;
	transition: color 0.2s ease, background 0.2s ease;
}

.page-content.user.signin .new-menu.navbar .item.active {
	color: var(--color-primary);
	background: color-mix(in srgb, var(--color-primary) 10%, transparent);
}

/* 输入框：圆角 + 聚焦光晕 */
.page-content.user.signin .ui.form .field input {
	padding: 11px 14px;
	border-radius: 10px;
	border: 1px solid var(--color-input-border, var(--color-secondary));
	background: var(--color-input-background, var(--color-body));
	color: var(--color-input-text, var(--color-text));
	transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

/* 复选框文字在深色下别丢 */
.page-content.user.signin .ui.checkbox label {
	color: var(--color-text-light-2);
}

.page-content.user.signin .ui.form .field > label {
	color: var(--color-text-light-2);
}

.page-content.user.signin .ui.form .field input:focus {
	border-color: var(--color-primary);
	box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 18%, transparent);
	outline: none;
}

/* 主按钮：渐变底 + 悬停流光 */
.page-content.user.signin .ui.primary.button {
	position: relative;
	min-width: 108px;
	border: 0;
	border-radius: 10px;
	background: linear-gradient(120deg, var(--color-primary), #38BDF8 55%, var(--color-primary));
	background-size: 200% 100%;
	box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--color-primary) 85%, transparent);
	transition: background-position 0.5s ease, transform 0.15s ease, box-shadow 0.3s ease;
}

.page-content.user.signin .ui.primary.button:hover {
	background-position: 100% 0;
	transform: translateY(-1px);
	box-shadow: 0 14px 28px -12px color-mix(in srgb, var(--color-primary) 90%, transparent);
}

.page-content.user.signin .ui.primary.button:active {
	transform: translateY(0);
}

/* 「记住此设备」这类复选框也跟着主色走 */
.page-content.user.signin .ui.checkbox input:checked ~ label::before,
.page-content.user.signin .ui.checkbox label::before {
	border-color: var(--color-secondary);
}

/* =========================================================================
   5. 减少动态效果
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
	/* 过渡也一并压掉：主题在 JS 切换时有 200ms 过渡，弱动画用户不应看到它 */
	*,
	*::before,
	*::after {
		transition-duration: 0.01ms !important;
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
	}

	body.qq-fx-active::before,
	body.qq-fx-active::after,
	.qq-logo-halo::before,
	.qq-logo-halo .logo,
	.qq-hero-title {
		animation: none !important;
	}

	.qq-hero-tag.qq-typing::after,
	.qq-hero-tag.qq-typed::after {
		animation: none;
		opacity: 1;
	}

	.qq-home-card,
	.qq-home-card::after,
	.page-content.user.signin .ui.primary.button {
		transition: none !important;
	}
}

/* 窄屏：光环缩小，卡片贴边 */
@media (max-width: 600px) {
	.qq-logo-halo { width: 132px; height: 132px; }
	.qq-logo-halo .logo { width: 118px; height: 118px; }
	.qq-hero { padding: 3vh 0 6vh; gap: 8px; }
	.qq-hero-title { font-size: clamp(32px, 11vw, 46px); }
	.qq-hero-tag { font-size: 14px; }
	.qq-home-cards { padding: 0 16px 9vh; }
}

/* 表单字段：强制「标签在左、输入框在右」的一行式布局。
   index.css 里 .inline.field 的行为在窄容器下会退化成上下堆叠，
   这里用显式 flex 规则钉死，保证深浅色/窄屏都是同一套版式。 */
.page-content.user.signin .ui.form .field {
	display: flex !important;
	flex-direction: row !important;
	flex-wrap: nowrap !important;
	align-items: center !important;
	gap: 12px !important;
	margin: 0 0 14px 0 !important;
}

.page-content.user.signin .ui.form .field > label {
	flex: 0 0 96px !important;
	width: 96px !important;
	margin: 0 !important;
	text-align: right !important;
	font-size: 13px !important;
	line-height: 1.6 !important;
}

.page-content.user.signin .ui.form .field > input {
	flex: 1 1 auto !important;
	width: auto !important;
	min-width: 0 !important;
	box-sizing: border-box !important;
}

.page-content.user.signin .ui.form .field > .ui.checkbox,
.page-content.user.signin .ui.form .field > button,
.page-content.user.signin .ui.form .field > a {
	flex: 0 0 auto !important;
}