/* base.css - 基础样式：变量、Reset、登录页、主布局（导航/内容区/状态栏）、响应式布局 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #4a9eff;
  --primary-dark: #2a7edf;
  --success: #28a745;
  --danger: #dc3545;
  --warning: #f0ad4e;
  --nav-bg: #1e1e2d;
  --nav-border: #2a2a3d;
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1e1e2d;
  --muted: #888888;
  --border: #e0e0e0;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ===== 登录页 ===== */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e1e2d 0%, #2a2a3d 60%, #4a9eff 130%);
  padding: 20px;
}

.login-card {
  background: #fff;
  width: 100%;
  max-width: 380px;
  padding: 36px 32px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.login-logo { font-size: 22px; font-weight: 700; color: var(--primary); text-align: center; }
.login-sub { text-align: center; color: var(--muted); font-size: 12px; margin: 6px 0 24px; }
.login-card label { display: block; font-size: 13px; color: var(--muted); margin: 14px 0 6px; }
.login-card input {
  width: 100%; padding: 10px 12px;
  border: 1px solid #c0c0c0; font-size: 14px; outline: none;
}
.login-card input:focus { border-color: var(--primary); }
.login-card button {
  width: 100%; margin-top: 22px; padding: 11px;
  background: var(--primary); color: #fff; border: none;
  font-size: 15px; font-weight: 600; cursor: pointer;
}
.login-card button:hover { background: var(--primary-dark); }
.login-card button:disabled { opacity: 0.6; cursor: not-allowed; }
.login-error { color: var(--danger); font-size: 13px; margin-top: 12px; min-height: 18px; }
.login-status { text-align: center; color: var(--muted); font-size: 12px; margin-top: 16px; }

/* ===== 主布局：左侧导航 + 内容区 ===== */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.app-top {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* 左侧导航 */
.nav {
  width: 200px;
  background: var(--nav-bg);
  border-right: 1px solid var(--nav-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.nav-title {
  color: #fff; font-size: 18px; font-weight: bold;
  padding: 20px 16px 10px;
}
.nav-sub { color: #6a6a7a; font-size: 11px; padding: 0 16px 20px; }
.nav-sep { height: 1px; background: var(--nav-border); }

.nav-btn {
  display: block; width: 100%; text-align: left;
  color: #a0a0b0; background: transparent; border: none;
  border-bottom: 2px solid var(--nav-border);
  border-left: 3px solid transparent;
  padding: 12px 20px; font-size: 14px; cursor: pointer;
  font-family: inherit;
}
.nav-btn:hover { background: var(--nav-border); color: #fff; }
.nav-btn.active {
  background: var(--nav-border); color: var(--primary);
  border-left: 3px solid var(--primary);
}

.nav-spacer { flex: 1; }
.nav-conn { color: #6a6a7a; font-size: 11px; padding: 10px 16px; }
.nav-conn.on { color: #5cb85c; }

/* 右侧内容区 */
.main {
  flex: 1;
  overflow-y: auto;
  padding: 0 20px 20px;
  display: flex;
  flex-direction: column;
}

.page { padding-top: 16px; flex: 1; }
.page-title { font-size: 20px; font-weight: bold; color: var(--text); padding: 4px 0; }
.page-sub { font-size: 12px; color: #888; padding-bottom: 12px; }

/* ===== 状态栏 ===== */
.status-bar {
  background: #f0f0f0;
  border-top: 1px solid #d0d0d0;
  padding: 5px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: #666;
  flex-shrink: 0;
}
.status-bar-spacer { flex: 1; }
#service-status.ok { color: var(--success); }
#service-status.err { color: var(--danger); }
#service-status.wait { color: var(--warning); }

/* ===== 响应式（布局部分） ===== */
@media (max-width: 900px) {
  .nav { width: 160px; }
}

@media (max-width: 640px) {
  .app { flex-direction: column; }
  .app-top { flex-direction: column; overflow: visible; }
  .nav {
    width: 100%; flex-direction: row; flex-wrap: wrap;
    border-right: none; border-bottom: 1px solid var(--nav-border);
  }
  .nav-title, .nav-sub, .nav-sep, .nav-spacer, .nav-conn { display: none; }
  .nav-btn { width: auto; border-bottom: none; border-left: none; padding: 10px 14px; font-size: 13px; }
  .nav-btn.active { border-bottom: 3px solid var(--primary); border-left: none; }
}