/* ============================================================
   main.css —— 全局样式
   深色主题、玻璃拟态、响应式布局
   ============================================================ */

/* CSS 变量：统一管理颜色 */
:root {
  --color-bg: #0b0e14;
  --color-text: #e6e8ee;
  --color-text-muted: #a0a6b5;
  --color-accent: #5b8cff;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);
  --radius: 16px;
  --blur: 16px;
  --nav-height: 60px;
}

/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 保证 hidden 属性始终生效，避免被组件级 display 规则覆盖
   （如 .admin-login 的 display:flex 会覆盖 UA 默认的 display:none） */
[hidden] {
  display: none !important;
}

html,
body {
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden; /* 无横向滚动条 */
  line-height: 1.6;
}

/* 必应壁纸背景层 + 暗色蒙版 */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center;
}

.bg-layer::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

/* 玻璃拟态卡片 */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
  animation: fadeIn 0.45s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ============ 全局状态提示（Toast） ============ */
.site-toast {
  position: fixed;
  top: calc(var(--nav-height) + 0.75rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  max-width: 90vw;
}

.site-toast.show {
  opacity: 1;
}

.site-toast-info {
  border-color: var(--color-accent);
}

.site-toast-error {
  border-color: #e74c3c;
}

/* 旋转加载指示器 */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--color-text);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* 导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 1.5rem;
}

.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.nav-menu a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-text);
}

/* 汉堡按钮（移动端） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* 页面主容器 */
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: calc(100vh - var(--nav-height));
}

.section {
  margin-bottom: 1.5rem;
  padding: 1.5rem;
}

.hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

/* 页脚 */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--color-text-muted);
}

/* ============ 首页 Hero ============ */
.hero-name {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.hero-title {
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.hero-bio {
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 1rem;
}

.hitokoto {
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: 1.5rem;
  min-height: 1.6em;
}

/* 3D 翻转头像 */
.avatar-flip {
  width: 160px;
  height: 160px;
  margin: 0 auto 1.5rem;
  perspective: 1000px;
}

.avatar-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s ease;
}

.avatar-flip:hover .avatar-inner {
  transform: rotateY(180deg);
}

.avatar-front,
.avatar-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-back {
  transform: rotateY(180deg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
  font-size: 0.9rem;
  padding: 1rem;
  text-align: center;
}

/* 社交链接 */
.social-links,
.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.social-link {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-family: inherit;
  transition: transform 0.2s ease, background 0.2s ease;
}

.social-link:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.14);
}

/* ============ 简历 / 关于等分区页 ============ */
.page-title {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.section-title {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
}

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

.entry {
  margin-bottom: 1rem;
}

.entry-head {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.entry-title {
  font-weight: 600;
}

.entry-period {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.entry-sub {
  color: var(--color-accent);
  font-size: 0.95rem;
}

.entry-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.skill-group {
  margin-bottom: 0.75rem;
}

.skill-category {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.skill-items {
  color: var(--color-text-muted);
}

.empty-hint {
  color: var(--color-text-muted);
}

/* ============ 项目卡片 ============ */
.loading-hint {
  color: var(--color-text-muted);
  text-align: center;
  padding: 1.5rem 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
  transition: transform 0.2s ease;
}

.project-card:hover {
  transform: translateY(-4px);
}

.project-image {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 12px;
  background: var(--glass-bg);
}

.project-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.project-name {
  font-size: 1.2rem;
}

.project-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tag {
  font-size: 0.8rem;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  color: var(--color-text-muted);
  transition: background 0.2s ease, color 0.2s ease;
}

.project-tag:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--color-text);
}

.project-links {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.project-link {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 0.9rem;
}

.project-link:hover {
  text-decoration: underline;
}

/* ============ 移动端响应式：屏幕 < 640px 时导航转为汉堡菜单 ============ */
@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    display: none;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu li {
    text-align: center;
  }

  .nav-menu a {
    display: block;
    padding: 0.9rem;
  }
}

/* 项目网格：≥640px 时两列布局 */
@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============ 后台管理面板 ============ */
.admin-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.admin-login .glass {
  padding: 2rem;
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.admin-login .glass h1 {
  font-size: 1.5rem;
  text-align: center;
}

.admin-login .glass input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--color-text);
  padding: 0.6rem 0.8rem;
  font-family: inherit;
  font-size: 0.95rem;
}

.admin-login .glass input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.admin-login .glass button {
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  border: none;
  background: var(--color-accent);
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s ease, opacity 0.2s ease;
}

.admin-login .glass button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.admin-panel {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.admin-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.admin-actions button {
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

.admin-actions button:hover {
  background: rgba(255, 255, 255, 0.14);
}

.admin-actions button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* 保存按钮使用强调色，与登录按钮一致 */
.admin-actions #btn-save {
  background: var(--color-accent);
  color: #fff;
  border-color: transparent;
}

.admin-actions #btn-save:hover {
  background: #4a7be8;
}

.admin-hint {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.admin-section-title {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
}

.admin-subtitle {
  font-size: 1rem;
  margin: 1rem 0 0.5rem;
  color: var(--color-accent);
}

.admin-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.admin-label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.admin-field input,
.admin-field textarea {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--color-text);
  padding: 0.6rem 0.8rem;
  font-family: inherit;
  font-size: 0.95rem;
  width: 100%;
  resize: vertical;
}

.admin-field input:focus,
.admin-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.admin-btn {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.admin-btn:hover {
  background: rgba(255, 255, 255, 0.14);
}

.admin-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.admin-btn-add {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.admin-btn-del {
  border-color: #e74c3c;
  color: #e74c3c;
}

.admin-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.admin-list-item {
  padding: 1rem;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
}

.admin-list-item .admin-btn-del {
  margin-top: 0.25rem;
}

/* 消息提示 */
.admin-message {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  z-index: 999;
  background: rgba(0, 0, 0, 0.85);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
  font-size: 0.9rem;
  transition: opacity 0.3s ease;
  max-width: 90vw;
}

.admin-message-ok {
  border-color: #2ecc71;
}

.admin-message-error {
  border-color: #e74c3c;
}

.admin-message-hide {
  opacity: 0;
}

/* ============ 打印：简历页打印时隐藏装饰元素 ============ */
@media print {
  .bg-layer,
  .site-header,
  .site-footer {
    display: none !important;
  }

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

  .page {
    max-width: none;
    padding: 0;
  }

  .glass {
    background: none;
    border: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}