/* ==========================================================================
   WuDrop · 设计系统（styles.css）
   负责：设计 token、reset、全局基础样式、组件样式、动效系统，
        以及 ui-layout.css 不覆盖的部分（auth / drawer / modal / 背景）。
   布局覆盖由后加载的 ui-layout.css 负责。
   ========================================================================== */

/* ---------- 设计 token ---------- */
:root {
  /* 色 - 中性 */
  --bg: #eef3fb;
  --bg-soft: #f5f8fd;
  --paper: #ffffff;
  --ink: #101828;
  --ink-soft: #344054;
  --muted: #667085;
  --muted-2: #8b95a7;
  --line: #e4e9f2;
  --line-strong: #d6dde9;
  --soft: #f6f8fc;

  /* 色 - 主色（蓝） */
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: #eff5ff;
  --accent-line: #bcd2fb;

  /* 色 - 功能 */
  --success: #059669;
  --success-soft: #ecfdf5;
  --success-line: #a7f3d0;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --danger-line: #fecaca;
  --warn: #d97706;
  --warn-soft: #fffbeb;

  /* 字体 */
  --font: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system,
    "Segoe UI", sans-serif;
  --font-mono: "DM Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-pill: 999px;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-sm: 0 2px 8px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 8px 24px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 18px 48px rgba(16, 24, 40, 0.1);
  --shadow-xl: 0 30px 80px rgba(16, 24, 40, 0.14);

  /* 玻璃 */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-strong: rgba(255, 255, 255, 0.88);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-blur: blur(20px) saturate(140%);

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 140ms;
  --dur: 220ms;
  --dur-slow: 360ms;

  /* 尺寸 */
  --public-gutter: clamp(24px, 2.7vw, 48px);
  --p2p-shell-width: clamp(1100px, 70.6vw, 1440px);
  --cloud-shell-max: 1360px;
}

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

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

html,
body {
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 750;
}

p {
  margin: 0;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

button {
  font-family: inherit;
}

svg {
  display: block;
}

img {
  max-width: 100%;
}

::selection {
  background: rgba(37, 99, 235, 0.18);
}

/* ---------- 滚动条 ---------- */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
*::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border: 3px solid transparent;
  border-radius: var(--r-pill);
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover {
  background: #b9c2d2;
  background-clip: padding-box;
}

/* ---------- 页面骨架 ---------- */
.page {
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
}

/* 头部（被 ui-layout 接管 grid，这里只给基础视觉） */
.header {
  position: relative;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  margin: 0;
  padding: 0 var(--public-gutter);
  border-bottom: 1px solid var(--line);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-sm);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: none;
  color: var(--accent-strong);
}

.brand-mark svg {
  width: 30px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3.2;
}

.app-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
  padding: 4px;
  border-radius: var(--r-md);
  background: rgba(226, 234, 245, 0.7);
}

.app-nav-button {
  position: relative;
  border: 0;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--muted);
  padding: 7px 14px;
  font: 700 13px var(--font);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.app-nav-button:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.65);
}

.app-nav-button.active {
  color: var(--accent-strong);
  background: #fff;
  box-shadow: var(--shadow-xs);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- 按钮 ---------- */
.account-button,
.admin-link,
.text-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: #fff;
  color: var(--ink-soft);
  font: 700 13px var(--font);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease),
    transform var(--dur-fast) var(--ease);
}

.account-button:hover,
.admin-link:hover,
.text-action:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.account-button:active,
.admin-link:active,
.text-action:active {
  transform: scale(0.97);
}

.admin-link svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.9;
}

/* 主按钮 */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: var(--r-md);
  padding: 13px 18px;
  font: 800 14px var(--font);
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease),
    box-shadow var(--dur) var(--ease),
    background var(--dur-fast) var(--ease);
}

.button:not(:disabled):hover {
  transform: translateY(-1px);
}

.button:not(:disabled):active {
  transform: translateY(0) scale(0.99);
}

.primary {
  background: linear-gradient(135deg, #2f7df4, #1d4ed8);
  color: #fff;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.primary:not(:disabled):hover {
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.32),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.primary:disabled {
  background: #c7d6ea;
  color: #fff;
  box-shadow: none;
  cursor: not-allowed;
}

.secondary {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--ink-soft);
}

.secondary:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.wide {
  width: 100%;
}

.button-icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

/* 小图标按钮（文件操作） */
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 50px;
  height: 34px;
  padding: 0 11px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--ink-soft);
  font: 700 12px var(--font);
  text-decoration: none;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.icon-button:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.icon-button.danger:hover {
  border-color: var(--danger-line);
  background: var(--danger-soft);
  color: var(--danger);
}

/* ---------- 表单 ---------- */
input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--ink);
  padding: 12px 14px;
  font: 14px var(--font);
  outline: 0;
  transition: border-color var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}

input::placeholder {
  color: var(--muted-2);
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.field {
  margin-top: 18px;
}

.field label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 700;
}

.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.inline-action {
  border: 0;
  background: transparent;
  color: var(--accent-strong);
  padding: 2px 0;
  font: 700 12px var(--font);
  cursor: pointer;
}

.field-tip {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

/* ---------- 通用工具 ---------- */
.hidden {
  display: none !important;
}

.section-kicker {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
  font: 800 11px var(--font);
  letter-spacing: 0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--accent-line);
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent-strong);
  padding: 6px 12px;
  font: 700 11px var(--font);
}

.eyebrow::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- 站点公告 ---------- */
.site-announcement {
  margin: 12px 0 0;
  padding: 11px 16px;
  border: 1px solid var(--accent-line);
  border-radius: var(--r-md);
  background: var(--accent-soft);
  color: var(--accent-strong);
  text-align: center;
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, 24px);
  max-width: calc(100vw - 32px);
  border-radius: var(--r-md);
  background: var(--ink);
  color: #fff;
  padding: 12px 18px;
  font: 700 13px var(--font);
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--shadow-xl);
  transition: opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.toast.error {
  background: var(--danger);
}

.toast.success {
  background: var(--success);
}

/* ==========================================================================
   动效系统（keyframes + 动画 utility class）
   ========================================================================== */
@keyframes wd-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes wd-fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes wd-fade-down {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes wd-scale-in {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes wd-modal-in {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.94); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

@keyframes wd-slide-left {
  from { opacity: 0; transform: translateX(28px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes wd-slide-right-in {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

@keyframes wd-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

@keyframes wd-pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.32); }
  70% { box-shadow: 0 0 0 14px rgba(37, 99, 235, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

@keyframes wd-shimmer {
  from { background-position: -200% 0; }
  to { background-position: 200% 0; }
}

@keyframes wd-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes wd-spin {
  to { transform: rotate(360deg); }
}

@keyframes wd-progress-stripe {
  from { background-position: 0 0; }
  to { background-position: 28px 0; }
}

/* utility 动画 class */
.wd-anim-fade-in { animation: wd-fade-in var(--dur-slow) var(--ease) both; }
.wd-anim-fade-up { animation: wd-fade-up var(--dur-slow) var(--ease) both; }
.wd-anim-fade-down { animation: wd-fade-down var(--dur) var(--ease) both; }
.wd-anim-scale-in { animation: wd-scale-in var(--dur) var(--ease) both; }

/* 列表项 staggered 进入 */
.wd-stagger > * {
  animation: wd-fade-up var(--dur-slow) var(--ease) both;
}
.wd-stagger > *:nth-child(1) { animation-delay: 30ms; }
.wd-stagger > *:nth-child(2) { animation-delay: 70ms; }
.wd-stagger > *:nth-child(3) { animation-delay: 110ms; }
.wd-stagger > *:nth-child(4) { animation-delay: 150ms; }
.wd-stagger > *:nth-child(5) { animation-delay: 190ms; }
.wd-stagger > *:nth-child(6) { animation-delay: 230ms; }
.wd-stagger > *:nth-child(7) { animation-delay: 270ms; }
.wd-stagger > *:nth-child(8) { animation-delay: 310ms; }

/* spinner */
.wd-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: wd-spin 0.6s linear infinite;
}

/* ==========================================================================
   P2P 视图（基础视觉，布局细节由 ui-layout.css 覆盖）
   ========================================================================== */
body[data-app-view="p2p"],
body[data-app-view="cloud"] {
  min-height: 100vh;
  background-color: #e6f0fb;
  background-image: var(--p2p-background-image, url("/p2p-background.svg"));
  background-attachment: fixed;
  background-position: center top;
  background-repeat: no-repeat;
  background-size: cover;
}

body[data-app-view="p2p"] .page,
body[data-app-view="cloud"] .page {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: none;
  min-height: 100svh;
  margin: 0;
}

/* 顶部公告条 */
body[data-app-view="p2p"] .site-announcement,
body[data-app-view="cloud"] .site-announcement {
  width: min(100% - 48px, 1180px);
  margin: 12px auto 0;
}

/* 标题区 */
.intro {
  padding: clamp(40px, 6vh, 60px) 0 24px;
}

.intro h1 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: clamp(38px, 4.2vw, 60px);
  font-weight: 760;
  line-height: 1.05;
  letter-spacing: -2.5px;
}

.intro p {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

/* 主卡片：玻璃拟态 */
.transfer-card {
  overflow: hidden;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg);
  box-shadow: var(--shadow-lg),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  backdrop-filter: var(--glass-blur);
}

/* 拖放区 */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  border: 1.5px dashed var(--accent-line);
  border-radius: var(--r-lg);
  background: radial-gradient(240px 180px at 50% 34%, rgba(80, 150, 230, 0.08), transparent 72%),
    rgba(255, 255, 255, 0.8);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.dropzone:hover,
.dropzone.drag {
  border-color: var(--accent);
  background: radial-gradient(260px 190px at 50% 34%, rgba(80, 150, 230, 0.14), transparent 72%),
    rgba(255, 255, 255, 0.94);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7),
    0 14px 36px rgba(37, 99, 235, 0.12);
}

.dropzone.drag {
  animation: wd-pulse-ring 1.6s var(--ease) infinite;
}

.upload-mark {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  margin: 0 0 18px;
  border-radius: 50%;
  background: linear-gradient(160deg, #eaf3ff, #d4e6ff);
  color: var(--accent-strong);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.14),
    inset 0 1px 0 #fff;
}

.upload-mark svg {
  width: 36px;
  height: 36px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.dropzone strong {
  color: var(--ink);
  font-size: 21px;
  letter-spacing: -0.4px;
}

.dropzone small {
  margin-top: 9px;
  max-width: 320px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  line-height: 1.6;
}

.dropzone-support {
  margin-top: 4px !important;
  color: var(--muted-2) !important;
  font-size: 12px !important;
}

/* 文件列表 */
.file-list:not(:empty) {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 0;
}

.file-list:empty {
  display: none;
}

.file-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: #fff;
  font-size: 12px;
  animation: wd-fade-up var(--dur) var(--ease) both;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
  cursor: default;
}

.file-item:hover {
  border-color: var(--accent-line);
  box-shadow: var(--shadow-sm);
  z-index: 10;
}

/* tooltip 玻璃卡片 */
.file-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 200px;
  max-width: 340px;
  padding: 10px 14px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  background: var(--glass-bg-strong);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.9);
  backdrop-filter: var(--glass-blur);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s var(--ease-out), transform 0.22s var(--ease-out);
  z-index: 100;
}

.file-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--glass-bg-strong);
}

.file-item:hover .file-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.file-tooltip strong {
  display: block;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  word-break: break-all;
  line-height: 1.3;
}

.file-tooltip span {
  color: var(--muted);
  font-size: 11px;
}

.file-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1 1 auto;
  color: var(--ink);
  font-weight: 600;
}

.file-type {
  flex: none;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.file-dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.file-size {
  flex: none;
  color: var(--muted);
  font: 10px var(--font-mono);
}

.remove-file {
  flex: none;
  border: 0;
  background: transparent;
  color: var(--muted-2);
  font-size: 16px;
  line-height: 1;
  padding: 2px 4px;
  cursor: pointer;
  border-radius: 4px;
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.remove-file:hover {
  color: var(--danger);
  background: var(--danger-soft);
}

/* 设置侧 */
.transfer-settings-side {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: rgba(255, 255, 255, 0.32);
}

.settings-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.settings-head > div > span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font: 800 11px var(--font);
  letter-spacing: 0.04em;
}

.settings-head h2 {
  margin: 0;
  color: var(--ink);
  font-size: 26px;
  letter-spacing: -0.8px;
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  flex: none;
  color: var(--success);
  font: 700 11px var(--font);
}

.security-badge svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.9;
}

.settings-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.5);
  color: var(--muted);
}

.settings-mark svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

/* 口令输入组 */
.password-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
}

.password-row .text-action {
  width: auto;
  min-height: 46px;
  padding: 0 12px;
  font-size: 12px;
  white-space: nowrap;
}

.compact-action {
  font-size: 12px;
}

/* 链接生成区 */
.connection-box {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid rgba(116, 145, 170, 0.18);
  animation: wd-fade-up var(--dur-slow) var(--ease) both;
}

.link-heading {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 700;
}

.expires {
  color: var(--muted);
  font: 11px var(--font-mono);
}

.room-code {
  padding: 18px 0;
  color: var(--accent-strong);
  font: 800 30px var(--font-mono);
  letter-spacing: 6px;
}

.share-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.share-row input {
  flex: 1 1 100%;
  background: rgba(255, 255, 255, 0.7);
  font: 12px var(--font-mono);
}

.share-hint {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.expiry-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.expiry-note svg {
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

/* 接收侧 room 输入 */
.room-input {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
}

/* 状态/进度 */
.status-box {
  margin-top: 18px;
  padding: 13px 14px;
  border: 1px solid var(--success-line);
  border-radius: var(--r-md);
  background: var(--success-soft);
  color: var(--success);
  font-size: 13px;
  line-height: 1.65;
  animation: wd-fade-up var(--dur) var(--ease) both;
}

.status-box.error {
  border-color: var(--danger-line);
  background: var(--danger-soft);
  color: var(--danger);
}

.progress {
  height: 6px;
  margin: 8px 0 4px;
  border-radius: var(--r-pill);
  background: #dbeee5;
  overflow: hidden;
}

.progress i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #059669, #34d399);
  transition: width var(--dur) var(--ease);
}

.received-files {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 14px;
}

.received-files:empty {
  display: none;
}

.received-file {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--success-line);
  border-radius: var(--r-sm);
  background: var(--success-soft);
  font-size: 12px;
  animation: wd-fade-up var(--dur) var(--ease) both;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}

.received-file:hover {
  border-color: #34d399;
  box-shadow: 0 2px 10px rgba(5,150,105,0.08);
}

.received-file .file-dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 2px;
  background: var(--success);
  box-shadow: 0 0 0 2px rgba(5,150,105,0.15);
}

.received-file .file-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1 1 auto;
  color: var(--ink);
  font-weight: 600;
}

.received-file .file-type {
  flex: none;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(5,150,105,0.12);
  color: var(--success);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.received-file .file-size {
  flex: none;
  color: var(--muted);
  font: 10px var(--font-mono);
}

.received-file a {
  flex: none;
  border-radius: 4px;
  background: var(--success);
  color: #fff;
  padding: 5px 9px;
  font-size: 10px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur-fast) var(--ease);
}

.received-file a:hover {
  background: #047857;
}

/* 信任条 */
.privacy {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0 0;
  padding: 0;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  padding: 12px 14px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.62);
  box-shadow: var(--shadow-sm),
    inset 0 1px 0 rgba(255, 255, 255, 0.74);
  backdrop-filter: blur(14px) saturate(125%);
  transition: transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.trust-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.trust-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 50%;
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.6);
}

.trust-item:nth-child(1) .trust-icon {
  background: rgba(219, 234, 254, 0.9);
  color: #1d4ed8;
}

.trust-item:nth-child(2) .trust-icon {
  background: rgba(254, 243, 199, 0.9);
  color: #b45309;
}

.trust-item:nth-child(3) .trust-icon {
  background: rgba(209, 250, 229, 0.9);
  color: #047857;
}

.trust-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.trust-item strong,
.trust-item small {
  display: block;
}

.trust-item strong {
  color: var(--ink);
  font-size: 14px;
}

.trust-item small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.demo-link {
  margin: 16px auto 0;
  border: 0;
  background: transparent;
  color: var(--muted-2);
  font: 12px var(--font);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 4px;
}

/* ==========================================================================
   Cloud 视图基础视觉
   ========================================================================== */
.cloud-hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 22px;
  margin-top: 30px;
  padding: 34px 40px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg);
  box-shadow: var(--shadow-lg),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  backdrop-filter: var(--glass-blur);
}

.cloud-hero h1 {
  margin: 12px 0 9px;
  color: var(--ink);
  font-size: clamp(34px, 3.5vw, 48px);
  letter-spacing: -1.6px;
}

.cloud-hero p {
  max-width: 680px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

.cloud-badge {
  flex: none;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.6);
  color: var(--success);
  padding: 9px 14px;
  font: 800 12px var(--font-mono);
  white-space: nowrap;
  box-shadow: var(--shadow-xs);
}

/* 访客引导 */
.cloud-guest {
  max-width: 780px;
  margin: 26px auto 0;
  padding: 46px 36px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg-strong);
  text-align: center;
  box-shadow: var(--shadow-lg),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: var(--glass-blur);
}

.cloud-guest-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 26px;
  box-shadow: var(--shadow-sm);
}

.cloud-guest-copy h2 {
  margin: 8px 0 10px;
  font-size: 26px;
  letter-spacing: -1px;
}

.cloud-guest-copy p {
  max-width: 460px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.cloud-guest-points {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 22px 0;
}

.cloud-guest-points span {
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: #fff;
  color: var(--ink-soft);
  padding: 6px 12px;
  font-size: 12px;
}

.cloud-guest-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.cloud-guest-actions .button {
  padding: 12px 24px;
  text-decoration: none;
}

.guest-register-link {
  color: var(--accent-strong);
  font: 700 13px var(--font);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.guest-register-link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 云端仪表盘 */
.cloud-dashboard {
  display: grid;
  gap: 16px;
  margin-top: 22px;
  padding: 26px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg);
  box-shadow: var(--shadow-lg),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  backdrop-filter: var(--glass-blur);
}

.dashboard-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.dashboard-head h2 {
  margin: 4px 0 6px;
  color: var(--ink);
  font-size: 28px;
  letter-spacing: -1px;
}

.dashboard-head p {
  color: var(--muted);
  font-size: 14px;
}

.account-actions {
  display: flex;
  gap: 8px;
}

.quota-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 120px;
  padding: 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow-xs),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.quota-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 14px;
}

.quota-row strong {
  color: var(--ink);
  font: 13px var(--font-mono);
}

.quota-track {
  height: 10px;
  border-radius: var(--r-pill);
  background: #e6ecf4;
  overflow: hidden;
}

.quota-track i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #2563eb, #34d399);
  transition: width var(--dur-slow) var(--ease);
}

.quota-card small {
  margin-top: 11px;
  color: var(--muted);
  font-size: 12px;
}

/* 云端拖放区 */
.cloud-dropzone {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 120px;
  padding: 22px;
  border: 1.5px dashed var(--accent-line);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.78);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.cloud-dropzone:hover,
.cloud-dropzone.drag {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.1);
}

.cloud-dropzone.drag {
  animation: wd-pulse-ring 1.6s var(--ease) infinite;
}

.cloud-upload-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  flex: none;
  border-radius: var(--r-md);
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 22px;
}

.cloud-dropzone strong {
  display: block;
  font-size: 16px;
}

.cloud-dropzone small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.choose-button {
  margin-left: auto;
  border: 1px solid var(--accent-line);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--accent-strong);
  padding: 9px 14px;
  font: 700 13px var(--font);
  white-space: nowrap;
}

/* 上传队列 */
.cloud-upload-queue {
  display: grid;
  gap: 8px;
}

.cloud-upload-queue:empty {
  display: none;
}

.upload-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px 12px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  animation: wd-fade-up var(--dur) var(--ease) both;
}

.upload-row strong {
  display: block;
  font-size: 13px;
}

.upload-row small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font: 11px var(--font-mono);
}

.upload-percent {
  color: var(--muted);
  font: 700 11px var(--font-mono);
}

.upload-progress {
  grid-column: 1 / -1;
  height: 6px;
  border-radius: var(--r-pill);
  background: #e6ecf4;
  overflow: hidden;
}

.upload-progress i {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg,
    #2563eb,
    #2563eb 25%,
    #34d399 25%,
    #34d399 50%,
    #2563eb 50%,
    #2563eb 75%,
    #34d399 75%);
  background-size: 28px 100%;
  animation: wd-progress-stripe 0.7s linear infinite;
  transition: width var(--dur) var(--ease);
}

.upload-actions {
  display: flex;
  gap: 5px;
}

.upload-actions button {
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--muted);
  padding: 6px 9px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.upload-actions button:hover {
  border-color: var(--accent-line);
  color: var(--accent-strong);
}

.upload-actions button:last-child:hover {
  border-color: var(--danger-line);
  background: var(--danger-soft);
  color: var(--danger);
}

.upload-actions button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* 文件区 */
.files-section {
  padding: 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow-xs),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.files-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.files-heading h3 {
  font-size: 19px;
  letter-spacing: -0.4px;
}

.files-heading span {
  color: var(--muted);
  font-size: 12px;
}

.refresh-button {
  min-width: 58px;
}

.cloud-file-list {
  display: grid;
  gap: 9px;
}

.cloud-file-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  transition: border-color var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease),
    transform var(--dur-fast) var(--ease);
  animation: wd-fade-up var(--dur) var(--ease) both;
}

.cloud-file-card:hover {
  border-color: var(--accent-line);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.file-main {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.file-main > div {
  min-width: 0;
}

.file-main strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 14px;
}

.file-main small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.file-type {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: none;
  border-radius: var(--r-sm);
  background: var(--accent-soft);
  color: var(--accent-strong);
  font: 800 10px var(--font-mono);
}

.file-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex: none;
}

.empty-files {
  display: grid;
  place-items: center;
  text-align: center;
  min-height: 140px;
  padding: 34px 18px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.5);
  color: var(--muted);
}

.empty-files span {
  font-size: 28px;
  color: var(--muted-2);
}

.empty-files strong {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.empty-files p {
  max-width: 320px;
  margin: 7px 0 0;
  font-size: 12px;
  line-height: 1.7;
}

/* ==========================================================================
   合作推广
   ========================================================================== */
.sponsor-card {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 26px auto 0;
  padding: 16px 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  background: var(--glass-bg);
  box-shadow: var(--shadow-md),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: var(--glass-blur);
}

.sponsor-image {
  width: 92px;
  height: 60px;
  flex: none;
  border-radius: var(--r-md);
  object-fit: cover;
  background: var(--soft);
}

.sponsor-copy {
  min-width: 0;
}

.sponsor-copy > span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted-2);
  font: 700 9px var(--font);
  letter-spacing: 0.1em;
}

.sponsor-copy strong {
  display: block;
  font-size: 15px;
}

.sponsor-copy p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.sponsor-button {
  margin-left: auto;
  flex: none;
  border-radius: var(--r-sm);
  background: var(--ink);
  color: #fff;
  padding: 10px 15px;
  font: 800 12px var(--font);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur-fast) var(--ease),
    transform var(--dur-fast) var(--ease);
}

.sponsor-button:hover {
  background: #1c2433;
  transform: translateY(-1px);
}

footer {
  padding: 22px 0 28px;
  color: var(--muted);
  text-align: center;
  font: 11px var(--font-mono);
}

/* ==========================================================================
   账户抽屉 / 菜单 / 设置弹窗
   ========================================================================== */
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.form-actions .text-action {
  flex: 1 1 auto;
  min-height: 40px;
}

.danger-text {
  color: var(--danger);
}

/* 头像按钮（顶部） */
.account-avatar-button {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  min-height: 42px;
  padding: 0;
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-size: 18px;
  font-weight: 900;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease);
}

.account-avatar-button:hover {
  transform: scale(1.05);
}

.account-trigger-avatar {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-size: 17px;
  font-weight: 800;
}

.account-trigger-chevron {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--ink-soft);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

/* 账户菜单 popover */
.account-menu-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: transparent;
}

.account-menu-popover {
  position: fixed;
  top: 80px;
  right: clamp(18px, 4vw, 68px);
  z-index: 90;
  width: min(320px, calc(100vw - 30px));
  padding: 14px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg-strong);
  box-shadow: var(--shadow-xl),
    inset 0 1px 0 rgba(255, 255, 255, 0.86);
  backdrop-filter: var(--glass-blur);
  animation: wd-fade-down var(--dur) var(--ease) both;
}

.account-menu-popover.hidden,
.account-menu-scrim.hidden,
.settings-modal.hidden,
.settings-modal-scrim.hidden {
  display: none;
}

.account-menu-card {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
  padding: 10px;
  border-radius: var(--r-lg);
  background: var(--accent-soft);
}

.account-avatar {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}

.account-menu-card strong,
.account-menu-card small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.account-menu-card strong {
  color: var(--ink);
  font-size: 16px;
}

.account-menu-card small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.account-menu-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--ink);
  padding: 0 12px;
  text-align: left;
  text-decoration: none;
  font: 700 14px var(--font);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease);
}

.account-menu-item:hover {
  background: var(--accent-soft);
}

.account-menu-item.danger {
  color: var(--danger);
}

.account-menu-item.danger:hover {
  background: var(--danger-soft);
}

/* 设置弹窗 */
.settings-modal-scrim {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(16, 24, 40, 0.32);
  backdrop-filter: blur(6px);
  animation: wd-fade-in var(--dur) var(--ease) both;
}

.settings-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 110;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: min(720px, calc(100vw - 32px));
  max-height: min(88vh, 820px);
  transform: translate(-50%, -50%);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg-strong);
  box-shadow: var(--shadow-xl),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  backdrop-filter: var(--glass-blur);
  animation: wd-modal-in var(--dur-slow) var(--ease) both;
}

.settings-modal-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px 16px;
  border-bottom: 1px solid var(--line);
}

.settings-modal-head h2 {
  margin: 0 0 6px;
  color: var(--ink);
  font-size: 24px;
  letter-spacing: -0.7px;
}

.settings-modal-head p {
  color: var(--muted);
  font-size: 13px;
}

.settings-modal-body {
  display: grid;
  gap: 16px;
  padding: 20px 24px 24px;
  overflow: auto;
}

.settings-modal-body form {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-soft);
}

.settings-modal-body form > div strong,
.settings-modal-body form > div small {
  display: block;
}

.settings-modal-body form > div strong {
  color: var(--ink);
  font-size: 15px;
}

.settings-modal-body form > div small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

/* 背景选择 */
.background-picker {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-height: 54px;
  padding: 10px 12px;
  border: 1px dashed var(--accent-line);
  border-radius: var(--r-md);
  background: #fff;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease);
}

.background-picker:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.background-picker span {
  border-radius: var(--r-sm);
  background: var(--accent-soft);
  color: var(--accent-strong);
  padding: 9px 12px;
  font-weight: 800;
}

.background-picker small {
  overflow: hidden;
  color: var(--muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.background-crop-panel {
  display: grid;
  gap: 12px;
  animation: wd-fade-up var(--dur) var(--ease) both;
}

.background-crop-panel canvas {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-soft);
  box-shadow: var(--shadow-xs);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.background-crop-panel canvas.dragging {
  cursor: grabbing;
}

.crop-help {
  margin: -2px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.crop-controls {
  display: grid;
  gap: 10px;
}

.crop-controls label {
  display: grid;
  gap: 7px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.crop-controls input {
  width: 100%;
  accent-color: var(--accent);
}

/* ==========================================================================
   P2P 发送/接收面板布局（sender-panel / receiver-panel）
   注意：sender-panel 的网格布局由 ui-layout.css 控制
   ========================================================================== */

.receiver-panel {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 24px;
  min-height: 0;
  padding: 28px;
  transition: justify-content 0.35s var(--ease);
}

.receiver-panel.receiving {
  justify-content: flex-start;
}

.receiver-panel .transfer-settings-side {
  width: min(420px, 100%);
  flex: none;
  padding: 28px;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.5);
  box-shadow: var(--shadow-xs), inset 0 1px 0 rgba(255, 255, 255, 0.7);
  transition: width 0.35s var(--ease), margin 0.35s var(--ease);
}

.receiver-panel.receiving .transfer-settings-side {
  width: min(340px, 42%);
  margin: 0;
}

.receiver-panel .received-files {
  flex: 1;
  min-width: 0;
  margin-top: 0;
  opacity: 0;
  transform: translateX(20px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}

.receiver-panel.receiving .received-files:not(:empty) {
  opacity: 1;
  transform: translateX(0);
}

.app-view {
  padding-bottom: 18px;
  animation: wd-fade-in var(--dur-slow) var(--ease) both;
}

/* ==========================================================================
   登录页（auth 页面基础，细节由 auth.css 覆盖）
   ========================================================================== */
.auth-page-body {
  min-height: 100vh;
  background-color: #eef3fb;
  background-image: var(--p2p-background-image, url("/p2p-background.svg"));
  background-attachment: fixed;
  background-position: center top;
  background-repeat: no-repeat;
  background-size: cover;
}

.auth-page {
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
}

.auth-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  border-bottom: 1px solid var(--line);
}

.auth-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: #fff;
  color: var(--ink-soft);
  padding: 0 13px;
  font: 700 12px var(--font);
  text-decoration: none;
}

.auth-back svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.auth-back:hover {
  border-color: var(--accent-line);
  color: var(--accent-strong);
}

.auth-layout {
  display: block;
  width: min(100%, 480px);
  min-height: auto;
  margin: 0 auto;
  padding: 38px 0 52px;
}

.auth-intro {
  padding: 0 12px 24px;
  text-align: center;
}

.auth-intro-badge {
  display: inline-flex;
  border: 1px solid var(--accent-line);
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent-strong);
  padding: 6px 12px;
  font: 700 11px var(--font);
}

.auth-intro h1 {
  max-width: none;
  margin: 14px 0 8px;
  font-size: 32px;
  line-height: 1.2;
  letter-spacing: -1.2px;
}

.auth-intro > p {
  max-width: 460px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.auth-surface {
  width: 100%;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg-strong);
  padding: 30px;
  box-shadow: var(--shadow-lg),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: var(--glass-blur);
  animation: wd-fade-up var(--dur-slow) var(--ease) both;
}

.auth-heading {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 22px;
}

.auth-heading-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: var(--r-md);
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 18px;
}

.auth-heading-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.auth-heading div > span {
  color: var(--accent);
  font: 800 11px var(--font);
}

.auth-heading h2 {
  margin: 4px 0 3px;
  font-size: 24px;
  letter-spacing: -1px;
}

.auth-heading p {
  color: var(--muted);
  font-size: 12px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--bg-soft);
}

.auth-tab {
  border: 0;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--muted);
  padding: 10px;
  font: 800 13px var(--font);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}

.auth-tab.active {
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}

.login-methods {
  display: flex;
  gap: 18px;
  margin: 20px 0 0;
  border-bottom: 1px solid var(--line);
}

.login-method {
  position: relative;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 10px 2px;
  font: 700 13px var(--font);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease);
}

.login-method::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--dur) var(--ease);
}

.login-method.active {
  color: var(--accent-strong);
}

.login-method.active::after {
  transform: scaleX(1);
}

.captcha-row {
  display: grid;
  grid-template-columns: 160px auto minmax(120px, 1fr);
  gap: 8px;
  align-items: stretch;
}

.captcha-row img {
  width: 160px;
  height: 62px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--bg-soft);
  object-fit: cover;
}

.captcha-refresh {
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--muted);
  padding: 0 12px;
  font: 700 12px var(--font);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.captcha-refresh:hover {
  border-color: var(--accent-line);
  color: var(--accent-strong);
}

.captcha-row input {
  height: 62px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.code-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.code-row .text-action,
.code-row .button {
  min-width: 112px;
}

.form-grid-auth {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 12px;
}

.form-grid-auth .full {
  grid-column: 1 / -1;
}

.auth-surface form .field {
  margin-top: 18px;
}

.auth-surface .wide {
  margin-top: 22px;
}

.auth-surface button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.form-error {
  margin: 14px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--danger-line);
  border-radius: var(--r-sm);
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 13px;
  animation: wd-fade-down var(--dur) var(--ease) both;
}

.auth-privacy {
  margin: 22px 0 0;
  padding-top: 17px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
  text-align: center;
}

.auth-page-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 26px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 11px var(--font-mono);
}

/* ==========================================================================
   响应式（基础，更细的布局响应式在 ui-layout.css）
   ========================================================================== */
/* ==========================================================================
   传输信息弹窗
   ========================================================================== */
.transfer-modal-scrim {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(16, 24, 40, 0.32);
  backdrop-filter: blur(6px);
  animation: wd-fade-in var(--dur) var(--ease) both;
}

.transfer-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 110;
  width: min(480px, calc(100vw - 32px));
  max-height: min(88vh, 720px);
  transform: translate(-50%, -50%);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  background: var(--glass-bg-strong);
  box-shadow: var(--shadow-xl), inset 0 1px 0 rgba(255,255,255,0.9);
  backdrop-filter: var(--glass-blur);
  animation: wd-modal-in var(--dur-slow) var(--ease) both;
}

.transfer-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 24px 16px;
  border-bottom: 1px solid var(--line);
}

.transfer-modal-head h2 {
  color: var(--ink);
  font-size: 20px;
  letter-spacing: -0.4px;
}

.transfer-modal-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px 24px 24px;
  overflow: auto;
}

.transfer-code {
  padding: 14px 0 0;
  text-align: center;
  color: var(--accent-strong);
  font: 800 36px var(--font-mono);
  letter-spacing: 8px;
}

.transfer-code-hint {
  margin: -8px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}

.transfer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.transfer-meta span {
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: #fff;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 600;
}

.transfer-link-row {
  display: flex;
  gap: 8px;
}

.transfer-link-row input {
  flex: 1;
  background: rgba(255,255,255,0.7);
  font: 12px var(--font-mono);
}

.transfer-pass-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--success-line);
  border-radius: var(--r-md);
  background: var(--success-soft);
}

.transfer-pass-row span {
  color: var(--muted);
  font-size: 12px;
}

.transfer-pass-row strong {
  color: var(--success);
  font: 700 14px var(--font-mono);
}

.transfer-status-box {
  min-height: 20px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--soft);
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

.transfer-status-box:empty {
  display: none;
}

.transfer-modal-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  padding-top: 4px;
}

.transfer-modal-actions .button {
  min-width: 120px;
}

@media (max-width: 720px) {
  .header {
    height: auto;
    padding: 13px 16px;
    flex-wrap: wrap;
    gap: 9px;
  }

  .cloud-hero {
    align-items: flex-start;
    flex-direction: column;
    padding: 26px 22px;
  }

  .cloud-hero h1 {
    font-size: 32px;
  }

  .cloud-dashboard {
    padding: 18px;
  }

  .dashboard-head,
  .cloud-dropzone {
    align-items: flex-start;
    flex-direction: column;
  }

  .choose-button {
    margin-left: 0;
  }

  .cloud-file-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .file-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .sponsor-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .sponsor-image {
    width: 100%;
    height: 130px;
  }

  .sponsor-button {
    width: 100%;
    margin-left: 0;
    text-align: center;
  }

  .auth-layout {
    padding: 28px 0;
  }

  .auth-intro h1 {
    font-size: 28px;
  }

  .auth-surface {
    padding: 24px 18px;
  }

  .auth-surface .captcha-row {
    grid-template-columns: 1fr auto;
  }

  .auth-surface .captcha-row img {
    width: 100%;
    height: 64px;
  }

  .auth-surface .captcha-row input {
    grid-column: 1 / -1;
    height: auto;
  }

  .auth-surface .form-grid-auth {
    grid-template-columns: 1fr;
  }

  .auth-surface .form-grid-auth .full {
    grid-column: auto;
  }

  .auth-page-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }
}

@media (max-width: 520px) {
  .upload-row {
    grid-template-columns: 1fr auto;
  }

  .upload-actions {
    grid-column: 1 / -1;
  }

  .upload-progress {
    grid-column: 1 / -1;
  }

  .cloud-guest {
    padding: 30px 18px;
  }

  .cloud-guest-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .cloud-guest-actions .button {
    width: 100%;
  }

  .code-row {
    grid-template-columns: 1fr;
  }

  .code-row .text-action,
  .code-row .button {
    min-height: 44px;
  }
}

@media (max-width: 620px) {
  .account-menu-popover {
    top: 72px;
    right: 12px;
  }

  .settings-modal {
    width: calc(100vw - 20px);
    max-height: 92vh;
    border-radius: var(--r-xl);
  }

  .settings-modal-head,
  .settings-modal-body {
    padding-left: 16px;
    padding-right: 16px;
  }

  .background-picker {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   无障碍：尊重 reduce-motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}