/**
 * 头部样式（精简优化版）
 * - 保留：头部基础/Logo/工具按钮/搜索/主题切换/用户菜单/登录模态
 * - 导航样式与行为交由 modules/nav.css 处理（不在此处隐藏/显示）
 */

@import url("modules/panel.css");

/*--------------------------------------------------------------
>>> 头部基础
--------------------------------------------------------------*/
.site-header {
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
  position: sticky;
  top: 0;
  transition: transform .3s ease;
  z-index: 1000;
  padding: .8rem 0;
}
.site-header.scroll-down { transform: translateY(-100%); }
.site-header.scroll-up   { transform: translateY(0); box-shadow: 0 2px 4px rgba(0,0,0,.1); }

/* 主行：站点菜单 | LOGO | 中间自适应 | 工具区 */
.header-wrapper {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  column-gap: 12px;
  padding: 0;
  position: relative;
}

/* 放置到对应网格列 */
.site-menu-wrapper { grid-column: 1; }
.site-branding     { grid-column: 2; }
.site-header .main-navigation {
  grid-column: 3;
  justify-self: center;
  position: static;
  left: auto; top: auto; transform: none;
  max-width: 100%;
  white-space: nowrap;
}
.header-tools { grid-column: 4; justify-self: end; }

/* 小屏头部布局：左右分布 */
@media (max-width: 768px) {
  .header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
  }
}

/*--------------------------------------------------------------
>>> 站点标题/Logo（单/双 Logo 适配）
--------------------------------------------------------------*/
.site-branding { display: flex; align-items: center; flex-shrink: 0; }
.site-branding .custom-logo-link {
  display: inline-flex; align-items: center; line-height: 0;
  position: relative; overflow: visible; isolation: isolate;
}

/* 单图滤镜变量（双图自动禁用） */
:root {
  --logo-filter: none;
  --logo-hover-filter: drop-shadow(0 6px 18px rgba(0,47,167,.35)) saturate(1.08) brightness(1.05);
}
[data-theme="dark"] {
  --logo-filter: saturate(0) contrast(130%) brightness(100%) invert(1);
  --logo-hover-filter: saturate(0) contrast(140%) brightness(105%) invert(1) drop-shadow(0 8px 20px rgba(0,47,167,.45));
}
.site-branding .custom-logo {
  height: auto; max-height: 42px; max-width: 200px; width: auto;
  object-fit: contain; vertical-align: middle;
  filter: var(--logo-filter);
  transition: transform .35s cubic-bezier(.2,.8,.2,1), filter .35s cubic-bezier(.2,.8,.2,1);
  will-change: transform, filter;
}

/* 双 Logo 自动切换（.has-dual-logo） */
.site-branding .custom-logo-link.has-dual-logo .logo--light { display: inline-block; }
.site-branding .custom-logo-link.has-dual-logo .logo--dark  { display: none; }
[data-theme="dark"] .site-branding .custom-logo-link.has-dual-logo .logo--light { display: none; }
[data-theme="dark"] .site-branding .custom-logo-link.has-dual-logo .logo--dark  { display: inline-block; }

/* 双图禁用反色滤镜，仅保留悬浮发光 */
.site-branding .custom-logo-link.has-dual-logo .custom-logo { filter: none; }
.site-branding .custom-logo-link.has-dual-logo:hover .custom-logo {
  filter: drop-shadow(0 6px 18px rgba(0,47,167,.35)) saturate(1.08) brightness(1.05);
}

/* 悬浮光晕层 */
.site-branding .custom-logo-link::before {
  content: "";
  position: absolute; inset: -10px; border-radius: 16px; pointer-events: none; z-index: 1;
  background:
    radial-gradient(60% 60% at 50% 50%, rgba(0,47,167,.25) 0%, rgba(0,47,167,0) 60%),
    radial-gradient(35% 35% at 25% 35%, rgba(255,255,255,.20) 0%, rgba(255,255,255,0) 60%);
  opacity: 0; transform: scale(.95);
  transition: opacity .35s ease, transform .35s ease, filter .35s ease;
  filter: blur(0);
}
.site-branding .custom-logo-link:hover::before { opacity: 1; transform: scale(1); filter: blur(.5px); }
.site-branding .custom-logo-link:hover .custom-logo { transform: scale(1.05) rotate(.4deg); filter: var(--logo-hover-filter); }

[data-theme="dark"] .site-branding .custom-logo-link::before {
  background:
    radial-gradient(60% 60% at 50% 50%, rgba(0,47,167,.35) 0%, rgba(0,47,167,0) 60%),
    radial-gradient(35% 35% at 25% 35%, rgba(255,255,255,.15) 0%, rgba(255,255,255,0) 60%);
}

@media (max-width: 992px) { .site-branding .custom-logo { max-height: 38px; max-width: 180px; } }
@media (max-width: 768px) { .site-branding .custom-logo { max-height: 32px; max-width: 160px; } }

/* 文字标题兜底 */
.site-title { margin: 0; font-size: 2rem; line-height: 1.4; }
.site-title a {
  color: var(--color-heading); text-decoration: none;
  font-family: "Source Han Serif CN", serif; font-weight: 900;
  transition: color .3s ease;
}
.site-title a:hover { color: var(--color-primary); }
[data-theme="dark"] .site-title a { color: #fff; }

/*--------------------------------------------------------------
>>> 工具按钮
--------------------------------------------------------------*/
.header-tools { display: flex; align-items: center; margin-left: auto; }
.tool-group   { display: flex; align-items: center; gap: 8px; }

.tool-button {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; padding: 0; border: 0;
  background: var(--color-background-light);
  color: var(--color-text);
  border-radius: 50%; cursor: pointer; transition: all .2s ease;
}
.tool-button i { font-size: 1.1rem; transition: transform .3s ease; }
.tool-button:hover { background: var(--color-primary); color: #fff; }
.tool-button:hover i { transform: scale(1.2); }

.random-post { position: relative; }
.random-post:hover i { transform: rotate(180deg); }

[data-theme="dark"] .tool-button { background: var(--color-background); color: var(--color-text); }
[data-theme="dark"] .tool-button:hover { background: var(--color-primary); color: #fff; }

@media (max-width: 1200px) { .tool-group { gap: 6px; } }
@media (max-width: 768px)  {
  .tool-group { gap: 4px; }
  .tool-button { width: 32px; height: 32px; }
  .tool-button i { font-size: 1rem; }
}
@media (max-width: 480px)  { .tool-group { gap: 3px; } .tool-button { width: 30px; height: 30px; } }

/*--------------------------------------------------------------
>>> 搜索框与搜索模态
--------------------------------------------------------------*/
.search-form { position: relative; }
.search-input-wrapper { position: relative; display: flex; align-items: center; }

.search-field {
  width: 180px; height: 36px; padding: 0 36px 0 1rem;
  border: 1px solid var(--color-border); border-radius: 18px;
  background: var(--color-background-light); color: var(--color-text);
  font-size: .9rem; transition: all .3s ease;
}
.search-field:focus { width: 300px; border-color: var(--color-primary); outline: none; }
.search-field::placeholder { color: var(--color-text-light); opacity: .7; }

.search-submit {
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 36px; height: 36px; padding: 0; border: 0; background: none;
  color: var(--color-text-light); cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: color .2s ease;
}
.search-submit:hover { color: var(--color-primary); }

/* 移动端：搜索改为按钮形态（隐藏输入框） */
@media (max-width: 768px) {
  .search-wrapper { margin: 0; display: inline-flex; align-items: center; }
  .search-wrapper .search-form { display: contents; }
  .search-wrapper .search-input-wrapper { display: contents; height: auto; }
  .search-wrapper .search-field { display: none !important; }
  .search-wrapper .search-submit {
    position: static !important;
    right: auto; top: auto; transform: none;
    display: inline-flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; padding: 0; border: 0; border-radius: 50%;
    background: var(--color-background-light);
    color: var(--color-text);
    transition: background-color .18s ease, color .18s ease, transform .18s ease;
  }
  .search-wrapper .search-submit i { font-size: 1rem; line-height: 1; }
  .search-wrapper .search-submit:hover { background: var(--color-primary); color: #fff; }
}

/* 搜索模态 */
.search-modal {
  position: fixed; inset: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,.8); backdrop-filter: blur(5px);
  z-index: 9999; opacity: 0; visibility: hidden; transition: all .3s ease;
}
.search-modal.active { opacity: 1; visibility: visible; }

.search-modal-inner {
  position: relative; width: 90%; max-width: 800px; margin: 80px auto 0;
  background: var(--color-background); border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,.2);
  transform: translateY(-20px); transition: transform .3s ease;
}
.search-modal.active .search-modal-inner { transform: translateY(0); }

.modal-search-header {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.5rem; border-bottom: 1px solid var(--color-border);
}
.search-icon { font-size: 1.2rem; color: var(--color-primary); }
.modal-search-form { flex: 1; }
.modal-search-field {
  width: 100%; padding: .8rem; border: 0; background: none;
  font-size: 1.2rem; color: var(--color-text);
}
.modal-search-field:focus { outline: none; }
.modal-search-field::placeholder { color: var(--color-text-light); }

.search-shortcut {
  display: inline-block; padding: .3rem .6rem;
  background: var(--color-background-light); border: 1px solid var(--color-border);
  border-radius: 4px; font-size: .8rem; color: var(--color-text-light);
}
.search-close {
  padding: .5rem; background: none; border: 0; color: var(--color-text-light);
  cursor: pointer; transition: color .2s ease;
}
.search-close:hover { color: var(--color-primary); }

.search-results-list { display: flex; flex-direction: column; gap: .8rem; }
.search-item { padding: .8rem; border-radius: 8px; transition: background-color .2s ease; }
.search-item:hover { background: var(--color-background-light); }
.search-item a {
  display: flex; align-items: center; justify-content: space-between;
  text-decoration: none; color: var(--color-text);
}
.search-title { font-size: 1rem; }
.search-date  { font-size: .85rem; color: var(--color-text-light); }
.highlight { color: var(--color-primary); font-weight: 500; }
.view-all {
  display: block; text-align: center; padding: 1rem; margin-top: 1rem;
  border-top: 1px solid var(--color-border); color: var(--color-primary);
  text-decoration: none; font-weight: 500;
}
.search-wrapper { position: relative; margin-right: 1rem; }

/* 暗色适配（搜索） */
[data-theme="dark"] .search-field { background: var(--color-background); border-color: var(--color-border); color: var(--color-text); }
[data-theme="dark"] .search-field:focus { background: var(--color-background-light); border-color: var(--color-primary); }
[data-theme="dark"] .search-field::placeholder { color: var(--color-text-light); opacity: .5; }
[data-theme="dark"] .search-modal { background: rgba(0,0,0,.9); backdrop-filter: blur(8px); }
[data-theme="dark"] .search-modal-inner { background: var(--color-background); box-shadow: 0 10px 30px rgba(0,0,0,.3); border: 1px solid var(--color-border); }
[data-theme="dark"] .modal-search-field { color: var(--color-text); }
[data-theme="dark"] .search-shortcut { background: var(--color-background); border-color: var(--color-border); }
[data-theme="dark"] .search-close:hover { background: var(--color-background-light); }

/*--------------------------------------------------------------
>>> 主题切换
--------------------------------------------------------------*/
.theme-switch {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; padding: 0; border: 0; border-radius: 50%;
  background: var(--color-background-light); color: var(--color-text);
  cursor: pointer; transition: all .3s ease;
}
.theme-switch:hover { background: var(--color-background); transform: translateY(-2px); }
.theme-switch i { font-size: 1.1rem; }
.theme-switch .light-icon { color: #ffa600; }
.theme-switch .dark-icon { display: none; }
[data-theme="dark"] .theme-switch { background: var(--color-background-light); }
[data-theme="dark"] .theme-switch:hover { background: var(--color-background); }
[data-theme="dark"] .theme-switch .light-icon { display: none; }
[data-theme="dark"] .theme-switch .dark-icon { display: block; color: #ffd43b; }

@media (max-width: 768px) { .theme-switch { width: 32px; height: 32px; } .theme-switch i { font-size: 1rem; } }

/*--------------------------------------------------------------
>>> 用户菜单 / 登录模态
--------------------------------------------------------------*/
.user-profile { position: relative; }
.user-avatar {
  padding: 0 !important; overflow: hidden; width: 32px; height: 32px;
  border-radius: 50%; border: 2px solid transparent; transition: all .2s ease;
}
.user-avatar:hover { border-color: var(--color-primary); transform: scale(1.1); }
.user-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }

.user-dropdown {
  position: absolute; top: calc(100% + 25px); right: -100px; width: 240px;
  background: var(--color-background); border-radius: 12px; box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .2s ease; z-index: 1000;
}
.user-profile:hover .user-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }

.user-info {
  padding: 1rem; display: flex; align-items: center; gap: 1rem;
  border-bottom: 1px solid var(--color-border);
}
.user-avatar-large { width: 64px; height: 64px; border-radius: 50%; overflow: hidden; }
.user-avatar-large img { width: 100%; height: 100%; object-fit: cover; }
.user-meta { flex: 1; }
.user-name { font-weight: 600; color: var(--color-text); margin-bottom: .25rem; }
.user-role { font-size: .85rem; color: var(--color-text-light); }

.user-links { padding: .5rem; }
.user-link {
  display: flex; align-items: center; gap: .75rem; padding: .75rem 1rem;
  color: var(--color-text); border-radius: 8px; transition: all .2s ease;
}
.user-link:hover { background: var(--color-background-light); color: var(--color-primary); }
.user-link.logout { color: #dc2626; }
.user-link.logout:hover { background: #fee2e2; color: #dc2626; }

.login-button { background: var(--color-background-light); }
.login-button:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }

[data-theme="dark"] .user-dropdown { background: var(--color-background); border: 1px solid var(--color-border); }
[data-theme="dark"] .user-link:hover { background: var(--color-background-light); }
[data-theme="dark"] .user-link.logout:hover { background: rgba(220,38,38,.1); }

/* 登录模态 */
.login-modal {
  position: fixed; inset: 0; width: 100%; height: 100vh;
  background: rgba(0,0,0,.5); backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; opacity: 0; visibility: hidden; transition: all .3s ease;
  overflow-y: auto; overscroll-behavior: contain;
}
.login-modal.active { opacity: 1; visibility: visible; }
.login-modal-inner {
  position: relative; width: 90%; max-width: 400px; margin: auto;
  background: var(--color-background); border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,.2);
  transform: translateY(-20px); transition: transform .3s ease;
}
.login-modal.active .login-modal-inner { transform: translateY(0); }

.login-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px; border-bottom: 1px solid var(--color-border);
}
.login-header h3 { margin: 0; font-size: 1.25rem; color: var(--color-text); }
.modal-close {
  width: 32px; height: 32px; border: 0; background: var(--color-background-light);
  color: var(--color-text); border-radius: 50%; cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: all .2s ease;
}
.modal-close:hover { background: var(--color-primary); color: #fff; transform: rotate(90deg); }

.login-content { padding: 20px; }

/* 表单（登录/找回公用） */
.login-form .form-group, .forgot-form .form-group { margin-bottom: 20px; }
.login-form label, .forgot-form label {
  display: block; margin-bottom: 8px; color: var(--color-text); font-size: .9rem;
}
.login-form input, .forgot-form input {
  width: 100%; padding: 12px; border: 1px solid var(--color-border); border-radius: 6px;
  background: var(--color-background-light); color: var(--color-text); font-size: .95rem; transition: all .2s ease;
}
.login-form input:focus, .forgot-form input:focus {
  outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(var(--color-primary-rgb), .1);
}

/* 密码显隐 */
.password-input { position: relative; }
.toggle-password {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  background: none; border: 0; color: var(--color-text-light); cursor: pointer; padding: 0;
}

/* 记住我/忘记密码 */
.form-check { display: flex; align-items: center; justify-content: space-between; margin: 15px 0; }
.form-check label { display: inline-flex; align-items: center; gap: 6px; margin: 0; cursor: pointer; }
.form-check input[type="checkbox"] { width: 16px; height: 16px; margin: 0; cursor: pointer; }
.form-check label span { color: var(--color-text); font-size: .9rem; user-select: none; }
.forgot-password { color: var(--color-primary); text-decoration: none; font-size: .9rem; transition: color .2s ease; }
.forgot-password:hover { text-decoration: underline; }
@media (max-width: 768px) { .form-check { margin: 12px 0; } .form-check label span { font-size: .85rem; } }

/* 找回密码显隐 */
.forgot-form { display: none; padding: 20px; }
.forgot-form.active { display: block; }
.login-form.hide { display: none; }

/* 提交按钮 */
.submit-btn, .login-form .submit-btn, .forgot-form .submit-btn {
  width: 100%; padding: 12px; border: 0; border-radius: 6px;
  background: var(--color-primary); color: #fff; font-size: 1rem; font-weight: 500;
  cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: all .2s ease;
}
.submit-btn:hover { background: var(--color-primary-dark, var(--color-primary)); transform: translateY(-1px); }
.submit-btn:disabled { opacity: .7; cursor: not-allowed; }

.login-error, .login-message {
  padding: 12px; margin-bottom: 15px; border-radius: 6px; font-size: 14px;
  opacity: 0; transform: translateY(-10px); transition: all .3s ease;
}
.login-error   { background: #fff5f5; color: #e53e3e; border: 1px solid #feb2b2; }
.login-message { background: #f0fff4; color: #38a169; border: 1px solid #9ae6b4; }
.login-error.show, .login-message.show { opacity: 1; transform: translateY(0); }

.login-message.login-success { background: #e7f6ed; color: #0a5132; border: 1px solid #9ddfc3; }
.login-message.login-error   { background: #fee7e7; color: #b91c1c; border: 1px solid #fca5a5; }
.login-message i { font-size: 1.1em; }

.login-footer { text-align: center; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--color-border); }

/* 暗色适配（登录） */
[data-theme="dark"] .forgot-form input { background: var(--color-background); border-color: var(--color-border); color: var(--color-text); }
[data-theme="dark"] .forgot-form input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(var(--color-primary-rgb), .15); }

/*--------------------------------------------------------------
>>> 基线对齐（桌面端）
--------------------------------------------------------------*/
@media (min-width: 769px) {
  :root { --hdr-item-h: 36px; }

  .site-header .header-wrapper { align-items: center; }

  .site-menu-wrapper,
  .site-branding,
  .site-header .main-navigation,
  .header-tools,
  .header-tools .tool-group,
  .search-wrapper,
  .search-wrapper .search-input-wrapper {
    display: flex;
    align-items: center;
    min-height: var(--hdr-item-h);
  }

  .tool-button,
  .theme-switch,
  .search-wrapper .search-submit,
  .user-profile .user-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--hdr-item-h);
    height: var(--hdr-item-h);
    box-sizing: border-box;
  }

  .search-form { margin: 0; }
  .search-field {
    height: var(--hdr-item-h);
    line-height: var(--hdr-item-h);
    padding: 0 12px;
    margin: 0;
    box-sizing: border-box;
  }

  .user-profile .user-avatar img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .site-branding .custom-logo-link { line-height: 0; }
  .main-navigation.hover-icons .nav-menu > li { line-height: 0; }
  .main-navigation.hover-icons .nav-menu > li > a i { line-height: 1; }

  .site-branding,
  .site-menu-wrapper,
  .site-header .main-navigation,
  .search-wrapper,
  .header-tools {
    margin-top: 0;
    margin-bottom: 0;
  }
}