/* ============================================
   Blog Admin Panel - Clean Design
   ============================================ */

:root {
  --bg: #F5F5F7;
  --card: #FFFFFF;
  --text: #1D1D1F;
  --text-secondary: #86868B;
  --border: #E5E5EA;
  --primary: #007AFF;
  --primary-hover: #0066D6;
  --success: #34C759;
  --danger: #FF3B30;
  --warning: #FF9500;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.08);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  --sidebar-w: 220px;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ========== Layout ========== */
#app { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; bottom: 0;
  z-index: 100;
}
.sidebar-header { display: flex; align-items: center; gap: 10px; padding: 20px; font-size: 16px; font-weight: 600; border-bottom: 1px solid var(--border); }
.sidebar-logo { font-size: 20px; }
.sidebar-nav { flex: 1; padding: 12px 8px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  text-decoration: none; color: var(--text); font-size: 14px;
  transition: background .15s;
}
.nav-item:hover { background: #F0F0F5; }
.nav-item.active { background: #EBF3FF; color: var(--primary); font-weight: 500; }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }
.sidebar-footer { padding: 12px; border-top: 1px solid var(--border); }

.main {
  margin-left: var(--sidebar-w);
  flex: 1; padding: 32px;
  max-width: calc(100vw - var(--sidebar-w));
}

/* ========== Login ========== */
.captcha-row { display: flex; align-items: center; gap: 8px; }
.captcha-question { font-size: 20px; font-weight: 700; padding: 8px 16px; background: #F0F0F5; border-radius: 8px; min-width: 60px; text-align: center; }
.captcha-eq { font-size: 18px; color: var(--text-secondary); }
.captcha-input { width: 64px !important; text-align: center; font-size: 18px !important; padding: 8px !important; }
.code-input-row { margin-bottom: 12px; }
.code-input {
  width: 100%; padding: 14px; font-size: 28px; letter-spacing: 12px; text-align: center;
  border: 2px solid var(--border); border-radius: var(--radius-sm); outline: none;
  font-family: 'SF Mono', monospace; transition: border .2s;
}
.code-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,122,255,0.1); }
.resend-text { font-size: 13px; color: var(--text-secondary); margin-top: 8px; text-align: center; }
.resend-text .btn-text-sm { padding: 0; color: var(--primary); font-size: 13px; cursor: pointer; border: none; background: none; }
.resend-text .btn-text-sm:disabled { color: var(--text-secondary); cursor: default; }
#view-login {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
}
.login-card {
  background: var(--card); border-radius: var(--radius);
  padding: 48px 40px; box-shadow: var(--shadow-lg); text-align: center; width: 360px;
}
.login-icon { font-size: 40px; margin-bottom: 12px; }
.login-card h1 { font-size: 24px; font-weight: 600; margin-bottom: 4px; }
.login-sub { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }
#login-form { display: flex; flex-direction: column; gap: 12px; }
#login-password {
  padding: 12px 16px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-size: 15px; outline: none;
  transition: border .2s;
}
#login-password:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,122,255,0.1); }
.error-msg { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 18px; }

/* ========== Buttons ========== */
.btn-primary, .btn-secondary, .btn-danger, .btn-text, .btn-text-sm {
  cursor: pointer; border: none; font-family: inherit;
  font-size: 14px; padding: 10px 20px; border-radius: var(--radius-sm);
  transition: all .15s; display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-secondary { background: #F0F0F5; color: var(--text); }
.btn-secondary:hover { background: #E5E5EA; }
.btn-danger { background: #FFF0EF; color: var(--danger); }
.btn-danger:hover { background: #FFE0DE; }
.btn-text { background: none; color: var(--text-secondary); padding: 8px 12px; }
.btn-text:hover { color: var(--text); background: #F0F0F5; }
.btn-text-sm { background: none; color: var(--danger); font-size: 13px; padding: 4px 8px; cursor: pointer; border: none; }
.btn-text-sm:hover { text-decoration: underline; }
.btn-lg { padding: 12px 32px; font-size: 15px; }
.btn-sm { padding: 6px 16px; font-size: 13px; }
.select-sm {
  padding: 8px 12px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-family: inherit;
  font-size: 14px; background: var(--card); cursor: pointer;
}

/* ========== Page Header ========== */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.page-header h2 { font-size: 22px; font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 10px; }

/* ========== Stats ========== */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); text-align: center; }
.stat-num { font-size: 32px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ========== Post List ========== */
.post-list { display: flex; flex-direction: column; gap: 8px; }
.post-item {
  background: var(--card); border-radius: var(--radius); padding: 16px 20px;
  box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px;
  transition: box-shadow .15s;
}
.post-item:hover { box-shadow: var(--shadow-lg); }
.post-item-cat {
  font-size: 12px; padding: 3px 10px; border-radius: 20px; font-weight: 500; white-space: nowrap;
}
.cat-project { background: #EBF3FF; color: var(--primary); }
.cat-life { background: #E8F8EE; color: #1B8A3D; }
.cat-research { background: #FFF3E0; color: #E67E00; }
.cat-hidden { background: #F0F0F5; color: var(--text-secondary); }
.post-item-main { flex: 1; min-width: 0; }
.post-item-title { font-size: 15px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.post-item-title.hidden-title { color: var(--text-secondary); text-decoration: line-through; }
.post-item-meta { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.post-item-actions { display: flex; gap: 6px; flex-shrink: 0; }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-secondary); font-size: 15px; }

/* ========== Forms ========== */
.post-form { max-width: 720px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 8px; }
.label-hint { font-weight: 400; color: var(--text-secondary); font-size: 12px; }
.form-group input[type="text"] {
  width: 100%; padding: 10px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 14px; outline: none;
  transition: border .2s; background: var(--card);
}
.form-group input[type="text"]:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,122,255,0.1); }

.category-select { display: flex; gap: 10px; }
.radio-card {
  flex: 1; cursor: pointer; padding: 16px 12px;
  border: 2px solid var(--border); border-radius: var(--radius);
  text-align: center; transition: all .15s;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.radio-card:hover { border-color: #C0C0C8; }
.radio-card:has(input:checked) { border-color: var(--primary); background: #EBF3FF; }
.radio-card input { display: none; }
.radio-icon { font-size: 24px; }
.radio-label { font-size: 14px; font-weight: 600; }
.radio-desc { font-size: 11px; color: var(--text-secondary); }

.upload-area {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 32px; text-align: center; cursor: pointer;
  transition: all .15s; color: var(--text-secondary);
}
.upload-area:hover, .upload-area.dragover { border-color: var(--primary); background: #F8FAFF; }
.upload-icon { font-size: 32px; margin-bottom: 8px; }
.upload-area p { font-size: 14px; margin-bottom: 12px; }
.file-info {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; background: #F0F0F5; border-radius: var(--radius-sm);
  margin-top: 8px; font-size: 14px;
}

.preview-tabs { display: flex; gap: 0; margin: 16px 0 0; border-bottom: 2px solid var(--border); }
.tab {
  padding: 8px 20px; cursor: pointer; font-family: inherit;
  font-size: 14px; border: none; background: none; color: var(--text-secondary);
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  transition: all .15s;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.preview-box {
  padding: 20px; background: var(--card); border: 1px solid var(--border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm); min-height: 200px;
  line-height: 1.8; max-height: 500px; overflow-y: auto;
}
.preview-box h1, .preview-box h2, .preview-box h3 { margin: 16px 0 8px; }
.preview-box h1 { font-size: 22px; }
.preview-box h2 { font-size: 18px; }
.preview-box p { margin-bottom: 8px; }
.preview-box ul, .preview-box ol { padding-left: 24px; margin-bottom: 8px; }
.preview-box code { background: #F0F0F5; padding: 2px 6px; border-radius: 4px; font-size: 13px; }
.preview-box pre { background: #1D1D1F; color: #F5F5F7; padding: 16px; border-radius: var(--radius-sm); overflow-x: auto; margin-bottom: 8px; }
.preview-box pre code { background: none; padding: 0; color: inherit; }
.preview-box blockquote { border-left: 3px solid var(--primary); padding-left: 16px; color: var(--text-secondary); margin-bottom: 8px; }
.source-box {
  width: 100%; min-height: 300px; padding: 14px; font-family: "SF Mono", "Fira Code", monospace;
  font-size: 13px; border: 1px solid var(--border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm); resize: vertical;
  background: #1D1D1F; color: #F5F5F7; line-height: 1.6;
}
.form-actions { display: flex; gap: 12px; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border); }
.status-msg { font-size: 13px; margin-top: 8px; min-height: 18px; }
.status-msg.loading { color: var(--primary); }
.status-msg.success { color: var(--success); }
.status-msg.error { color: var(--danger); }

/* ========== Monitor Panel ========== */
.section-desc { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }
.monitor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
.monitor-card {
  background: var(--card); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
.monitor-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.monitor-card-header h3 { font-size: 17px; font-weight: 600; }
.badge {
  font-size: 11px; padding: 3px 10px; border-radius: 20px;
  background: #F0F0F5; color: var(--text-secondary); font-weight: 500;
}
.monitor-desc { color: var(--text-secondary); font-size: 13px; margin-bottom: 16px; }
.monitor-config { display: flex; flex-direction: column; gap: 10px; }
.config-row { display: flex; flex-direction: column; gap: 4px; }
.config-row label { font-size: 12px; font-weight: 500; color: var(--text-secondary); }
.config-input {
  padding: 8px 12px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-family: inherit; font-size: 13px;
  outline: none; transition: border .2s;
}
.config-input:focus { border-color: var(--primary); }
.monitor-links { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.monitor-status { margin-top: 20px; }
.status-hint { color: var(--text-secondary); font-size: 13px; }

/* ========== Toast ========== */
.toast {
  position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%);
  padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 14px; z-index: 1000; box-shadow: var(--shadow-lg);
  transition: opacity .3s, transform .3s; opacity: 0; transform: translateX(-50%) translateY(10px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast-success { background: #E8F8EE; color: #1B8A3D; }
.toast-error { background: #FFF0EF; color: var(--danger); }

/* ========== Modal ========== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.3);
  display: flex; align-items: center; justify-content: center; z-index: 200;
}
.modal-box {
  background: var(--card); border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow-lg); max-width: 400px; width: 90%;
}
.modal-box p { font-size: 15px; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* ========== Utility ========== */
.hidden { display: none !important; }

@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar-header span:not(.sidebar-logo),
  .nav-item span:not(.nav-icon) { display: none; }
  .sidebar-header { justify-content: center; padding: 16px; }
  .nav-item { justify-content: center; padding: 10px; }
  .main { margin-left: 60px; padding: 20px; max-width: calc(100vw - 60px); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .category-select { flex-direction: column; }
  .monitor-grid { grid-template-columns: 1fr; }
}