/* ============================================
   小姚的太空博客 - 太空星空主题
   ============================================ */

/* --- 基础重置 & 字体 --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;700&display=swap');

:root {
  --bg-deep:    #050a15;
  --bg-card:     rgba(10, 20, 40, 0.55);
  --border-glow: rgba(80, 160, 255, 0.3);
  --accent:      #4fc3f7;
  --accent-dim:  #1565c0;
  --text-main:    #dce8ff;
  --text-muted:  #7b8ba8;
  --neon-blue:   #00b0ff;
  --neon-purple: #b388ff;
  --glass-bg:     rgba(12, 22, 45, 0.6);
}

html { font-size: 16px; }

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-deep);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* --- 星空 Canvas --- */
#starfield {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* --- 主容器 --- */
.container {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: 100vh;
}

/* --- 头部 --- */
.site-header {
  text-align: center;
  padding: 3rem 0 2rem;
  position: relative;
}

.site-title {
  font-size: 2.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.site-desc {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.15em;
}

.back-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  transition: color 0.3s;
}
.back-link:hover { color: var(--neon-purple); }

/* --- 玻璃卡片 --- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 30px rgba(0, 100, 255, 0.08);
  transition: box-shadow 0.3s;
}
.glass-card:hover {
  box-shadow: 0 0 50px rgba(0, 130, 255, 0.15);
}

/* --- 文章列表 --- */
.posts-list {
  margin-top: 1rem;
}

.post-card {
  display: block;
  text-decoration: none;
  color: inherit;
  margin-bottom: 1.2rem;
  cursor: pointer;
  transition: transform 0.25s, box-shadow 0.3s;
}
.post-card:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 0 60px rgba(0, 130, 255, 0.2);
}

.post-card h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.post-card .post-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.post-card .post-summary {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
  opacity: 0.85;
}

.post-card .post-tags {
  margin-top: 0.6rem;
}
.tag {
  display: inline-block;
  background: rgba(79, 195, 247, 0.12);
  color: var(--accent);
  border: 1px solid rgba(79, 195, 247, 0.3);
  border-radius: 20px;
  padding: 0.15rem 0.7rem;
  font-size: 0.75rem;
  margin-right: 0.4rem;
  margin-top: 0.3rem;
}

/* --- 文章详情 --- */
.post-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0.08em;
}

.post-content {
  line-height: 1.9;
  font-size: 1.05rem;
}
.post-content h1, .post-content h2, .post-content h3 {
  color: var(--accent);
  margin: 1.5em 0 0.6em;
}
.post-content p { margin-bottom: 1em; }
.post-content a {
  color: var(--neon-blue);
  text-decoration: underline;
}
.post-content code {
  background: rgba(79, 195, 247, 0.1);
  color: var(--neon-purple);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  font-size: 0.9em;
}
.post-content pre {
  background: rgba(5, 10, 25, 0.8);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  margin: 1em 0;
}
.post-content pre code {
  background: none;
  color: var(--accent);
  padding: 0;
}
.post-content ul, .post-content ol {
  padding-left: 1.5em;
  margin-bottom: 1em;
}
.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1em;
  color: var(--text-muted);
  margin: 1em 0;
  font-style: italic;
}

/* --- 管理表单 --- */
.admin-form { max-width: 600px; margin: 0 auto; }

.form-group {
  margin-bottom: 1.2rem;
}
.form-group label {
  display: block;
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
  letter-spacing: 0.08em;
}
.form-row {
  display: flex;
  gap: 1rem;
}
.form-row .form-group { flex: 1; }

input[type="text"],
input[type="date"],
textarea {
  width: 100%;
  background: rgba(5, 12, 30, 0.7);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  padding: 0.65rem 1rem;
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.3s, box-shadow 0.3s;
  outline: none;
}
input:focus, textarea:focus {
  border-color: var(--neon-blue);
  box-shadow: 0 0 15px rgba(0, 176, 255, 0.2);
}
textarea { resize: vertical; min-height: 120px; }

/* --- 按钮 --- */
.btn-neon {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-dim), var(--neon-blue));
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1.5rem;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: box-shadow 0.3s, transform 0.2s;
  box-shadow: 0 0 20px rgba(0, 150, 255, 0.25);
}
.btn-neon:hover {
  box-shadow: 0 0 35px rgba(0, 150, 255, 0.45);
  transform: translateY(-1px);
}
.btn-neon.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-glow);
  box-shadow: none;
}
.btn-neon.btn-secondary:hover {
  border-color: var(--neon-purple);
  box-shadow: 0 0 20px rgba(179, 136, 255, 0.2);
}
.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* --- 预览区 --- */
.preview-area {
  margin-top: 1.5rem;
  background: rgba(5, 10, 25, 0.8);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  padding: 1.2rem;
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.8;
}
.preview-area h1, .preview-area h2, .preview-area h3 {
  color: var(--accent);
  margin: 1em 0 0.5em;
}

/* --- 消息提示 --- */
.msg {
  margin-top: 1rem;
  font-size: 0.9rem;
  min-height: 1.2em;
}
.msg.success { color: #4caf50; }
.msg.error   { color: #ef5350; }

/* --- 加载提示 --- */
.loading {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 0;
  font-size: 1rem;
  letter-spacing: 0.1em;
}

/* --- 页脚 --- */
.site-footer {
  text-align: center;
  padding: 2.5rem 0 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

/* --- 响应式 --- */
@media (max-width: 600px) {
  .container { padding: 1rem; }
  .site-title { font-size: 1.6rem; }
  .glass-card { padding: 1rem 1.2rem; }
  .form-row  { flex-direction: column; gap: 0; }
}