/* ===== CSS Variables / Themes ===== */
:root {
  --sidebar-bg: #fff;
  --sidebar-text: #333;
  --sidebar-text-secondary: #888;
  --sidebar-hover-bg: #f5f5f5;
  --sidebar-active-bg: #e6f7ff;
  --sidebar-active-border: #1890ff;
  --sidebar-header-border: #f0f0f0;
  --sidebar-toggle-bg: #f0f0f0;
  --sidebar-toggle-hover: #d9d9d9;
  --sidebar-toggle-color: #888;
  --body-bg: #f0f2f5;
  --text-color: #333;
  --text-heading: #222;
  --card-bg: #fff;
  --card-shadow: 0 1px 4px rgba(0,0,0,.06);
  --card-border: #f0f0f0;
  --input-bg: #fff;
  --input-border: #d9d9d9;
  --input-color: #333;
  --table-header-bg: #fafafa;
  --table-border: #f0f0f0;
  --table-hover: #fafafa;
  --modal-overlay: rgba(0,0,0,.45);
  --modal-bg: #fff;
  --modal-border: #f0f0f0;
  --alert-info-bg: #e6f7ff;
  --alert-info-border: #91d5ff;
  --alert-info-color: #0050b3;
  --alert-warn-bg: #fff7e6;
  --alert-warn-color: #613400;
  --alert-error-bg: #fff2f0;
  --alert-error-border: #ffccc7;
  --alert-error-color: #a8071a;
  --alert-success-bg: #f6ffed;
  --alert-success-border: #b7eb8f;
  --alert-success-color: #135200;
  --stat-card-bg: #fff;
  --stat-label-color: #888;
  --detail-border: #f5f5f5;
  --detail-label: #888;
  --detail-value: #333;
  --login-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  --login-card-bg: #fff;
  --login-card-shadow: 0 2px 12px rgba(0,0,0,.08);
  --loading-color: #888;
  --footer-text: #bbb;
}

/* Dark theme */
body.dark-theme {
  --sidebar-bg: #1f1f1f;
  --sidebar-text: rgba(255,255,255,.85);
  --sidebar-text-secondary: rgba(255,255,255,.45);
  --sidebar-hover-bg: rgba(255,255,255,.08);
  --sidebar-active-bg: rgba(255,255,255,.08);
  --sidebar-active-border: #1890ff;
  --sidebar-header-border: rgba(255,255,255,.1);
  --sidebar-toggle-bg: rgba(255,255,255,.1);
  --sidebar-toggle-hover: rgba(255,255,255,.2);
  --sidebar-toggle-color: rgba(255,255,255,.45);
  --body-bg: #141414;
  --text-color: rgba(255,255,255,.85);
  --text-heading: rgba(255,255,255,.85);
  --card-bg: #1f1f1f;
  --card-shadow: 0 1px 4px rgba(0,0,0,.3);
  --card-border: #303030;
  --input-bg: #2a2a2a;
  --input-border: #434343;
  --input-color: rgba(255,255,255,.85);
  --table-header-bg: #1a1a1a;
  --table-border: #303030;
  --table-hover: #2a2a2a;
  --modal-overlay: rgba(0,0,0,.65);
  --modal-bg: #1f1f1f;
  --modal-border: #303030;
  --alert-info-bg: #111d2c;
  --alert-info-border: #153450;
  --alert-info-color: #91d5ff;
  --alert-warn-bg: #2b1d0a;
  --alert-warn-color: #ffd591;
  --alert-error-bg: #2a1215;
  --alert-error-border: #58181c;
  --alert-error-color: #ffa39e;
  --alert-success-bg: #162312;
  --alert-success-border: #274916;
  --alert-success-color: #b7eb8f;
  --stat-card-bg: #1f1f1f;
  --stat-label-color: rgba(255,255,255,.45);
  --detail-border: #303030;
  --detail-label: rgba(255,255,255,.45);
  --detail-value: rgba(255,255,255,.85);
  --login-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --login-card-bg: #1f1f1f;
  --login-card-shadow: 0 2px 12px rgba(0,0,0,.3);
  --loading-color: rgba(255,255,255,.45);
  --footer-text: rgba(255,255,255,.25);
}

/* ===== Базовые стили ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif; -webkit-font-smoothing: antialiased; font-size: 14px; line-height: 1.5; color: var(--text-color); background: var(--body-bg); transition: background .3s, color .3s; }
a { color: #1890ff; text-decoration: none; }
a:hover { color: #40a9ff; }
h1, h2, h3, h4 { font-weight: 600; color: var(--text-heading); }
h2 { font-size: 20px; margin-bottom: 16px; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }
table { border-collapse: collapse; width: 100%; }

/* ===== Layout ===== */
.layout { display: flex; min-height: 100vh; }

/* ===== Sidebar ===== */
.sidebar { width: 220px; background: var(--sidebar-bg); color: var(--sidebar-text); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; bottom: 0; z-index: 100; transition: width .2s, background .3s; overflow: hidden; box-shadow: 2px 0 8px rgba(0,0,0,.06); }
.sidebar.collapsed { width: 60px; }
.sidebar-header { padding: 16px 20px; border-bottom: 1px solid var(--sidebar-header-border); white-space: nowrap; overflow: hidden; transition: border-color .3s; }
.sidebar-header h2 { font-size: 16px; font-weight: 600; color: var(--sidebar-text); margin: 0; }
.sidebar-header .sub { font-size: 11px; color: var(--sidebar-text-secondary); margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 8px 0; overflow-y: auto; }
.sidebar-nav a { display: flex; align-items: center; gap: 10px; padding: 12px 24px; color: var(--sidebar-text); text-decoration: none; font-size: 14px; transition: all .2s; white-space: nowrap; overflow: hidden; border-left: 3px solid transparent; }
.sidebar-nav a:hover { color: var(--sidebar-text); background: var(--sidebar-hover-bg); }
.sidebar-nav a.active { color: #1890ff; background: var(--sidebar-active-bg); border-left-color: var(--sidebar-active-border); font-weight: 500; }
.sidebar-nav a .icon { width: 16px; text-align: center; font-size: 14px; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; }
.sidebar-nav a .icon svg { display: block; }
.sidebar-nav .menu-label { transition: opacity .2s; }
.sidebar.collapsed .menu-label { opacity: 0; width: 0; overflow: hidden; }
.sidebar.collapsed .sidebar-header h2,
.sidebar.collapsed .sidebar-header .sub { opacity: 0; }
.sidebar.collapsed .sidebar-nav a { justify-content: center; padding: 12px 0; }
.sidebar.collapsed .sidebar-footer .user-name { display: none; }
.sidebar.collapsed .sidebar-footer { justify-content: center; }
.sidebar-footer { padding: 12px 20px; border-top: 1px solid var(--sidebar-header-border); font-size: 13px; color: var(--sidebar-text-secondary); display: flex; align-items: center; justify-content: space-between; white-space: nowrap; overflow: hidden; transition: border-color .3s; }
.sidebar-footer .user-name { color: var(--sidebar-text); }
.sidebar-footer .logout-btn { color: var(--sidebar-text-secondary); cursor: pointer; display: flex; align-items: center; gap: 4px; }
.sidebar-footer .logout-btn:hover { color: #ff4d4f; }
.sidebar-toggle { position: absolute; bottom: 56px; left: 50%; transform: translateX(-50%); background: var(--sidebar-toggle-bg); border: none; color: var(--sidebar-toggle-color); width: 24px; height: 24px; border-radius: 4px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all .2s; z-index: 10; }
.sidebar-toggle:hover { background: var(--sidebar-toggle-hover); color: var(--sidebar-text); }
.sidebar.collapsed .sidebar-toggle { transform: translateX(-50%) rotate(180deg); }

/* Theme toggle in sidebar footer */
.theme-toggle { color: var(--sidebar-text-secondary); cursor: pointer; display: flex; align-items: center; gap: 4px; }
.theme-toggle:hover { color: var(--sidebar-text); }

/* ===== Main content ===== */
.main-content { margin-left: 220px; flex: 1; padding: 24px; min-height: 100vh; transition: margin-left .2s; }
.sidebar.collapsed + .main-content { margin-left: 60px; }

/* ===== Card ===== */
.card { background: var(--card-bg); border-radius: 8px; box-shadow: var(--card-shadow); margin-bottom: 16px; transition: background .3s, box-shadow .3s; }
.card-head { padding: 14px 20px; border-bottom: 1px solid var(--card-border); font-weight: 600; font-size: 15px; color: var(--text-heading); transition: border-color .3s; }
.card-body { padding: 20px; }

/* ===== Stat cards ===== */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--stat-card-bg); border-radius: 8px; padding: 20px; box-shadow: var(--card-shadow); transition: all .3s ease; }
.stat-card:hover { transform: translateY(-5px); box-shadow: 0 4px 12px rgba(0,0,0,.15); }
.stat-card .stat-value { font-size: 28px; font-weight: 700; }
.stat-card .stat-label { font-size: 13px; color: var(--stat-label-color); margin-top: 4px; }

/* ===== Form ===== */
.form-row { display: flex; gap: 16px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 16px; }
.form-row label { font-size: 13px; color: var(--stat-label-color); display: block; margin-bottom: 4px; }
.form-input, .form-row input[type="date"], .form-row input[type="number"], .form-row input[type="text"], .form-row select, .form-row textarea { padding: 4px 8px; border: 1px solid var(--input-border); border-radius: 6px; background: var(--input-bg); color: var(--input-color); height: 32px; transition: background .3s, border-color .3s, color .3s; }
.form-input:focus, .form-row input:focus, .form-row select:focus, .form-row textarea:focus { border-color: #40a9ff; outline: none; box-shadow: 0 0 0 2px rgba(24,144,255,.2); }
.form-row input[type="number"] { width: 200px; }
.form-row input[type="text"] { width: 200px; }
.form-row select { min-width: 250px; padding: 4px 8px; }
.form-row textarea { width: 100%; min-height: 60px; resize: vertical; height: auto; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border: 1px solid var(--input-border); border-radius: 6px; background: var(--card-bg); color: var(--text-color); cursor: pointer; font-size: 14px; line-height: 1.5; transition: all .2s; height: 32px; }
.btn:hover { border-color: #40a9ff; color: #40a9ff; }
.btn-primary { background: #1890ff; border-color: #1890ff; color: #fff; }
.btn-primary:hover { background: #40a9ff; border-color: #40a9ff; color: #fff; }
.btn-sm { font-size: 12px; padding: 2px 8px; height: 24px; }
.btn-link { border: none; background: none; color: #1890ff; padding: 0 4px; height: auto; }
.btn-link:hover { color: #40a9ff; }
.btn-warning { background: #faad14; border-color: #faad14; color: #fff; }
.btn-warning:hover { background: #ffc53d; border-color: #ffc53d; color: #fff; }
.btn-success { background: #52c41a; border-color: #52c41a; color: #fff; }
.btn-success:hover { background: #73d13d; border-color: #73d13d; color: #fff; }
.btn .icon { font-size: 14px; }

/* ===== Table ===== */
.table { width: 100%; border-collapse: collapse; }
.table th { background: var(--table-header-bg); padding: 12px 16px; text-align: left; font-weight: 600; font-size: 13px; color: var(--text-color); border-bottom: 1px solid var(--table-border); transition: background .3s, border-color .3s; }
.table td { padding: 12px 16px; border-bottom: 1px solid var(--table-border); font-size: 14px; transition: border-color .3s; }
.table tr:hover td { background: var(--table-hover); }

/* ===== Tag / Status badges ===== */
.tag { display: inline-block; padding: 1px 8px; border-radius: 4px; font-size: 12px; line-height: 1.5; color: #fff; }
.tag-blue { background: #1890ff; }
.tag-green { background: #52c41a; }
.tag-orange { background: #faad14; }
.tag-red { background: #ff4d4f; }
.tag-purple { background: #722ed1; }
.tag-default { background: #d9d9d9; color: #555; }

/* ===== Alert ===== */
.alert { padding: 8px 12px; border-radius: 6px; font-size: 13px; margin-bottom: 8px; }
.alert-info { background: var(--alert-info-bg); border: 1px solid var(--alert-info-border); color: var(--alert-info-color); }
.alert-warning { background: var(--alert-warn-bg); border-left: 4px solid #faad14; padding: 12px; border-radius: 4px; color: var(--alert-warn-color); }
.alert-error { background: var(--alert-error-bg); border: 1px solid var(--alert-error-border); color: var(--alert-error-color); }
.alert-success { background: var(--alert-success-bg); border: 1px solid var(--alert-success-border); color: var(--alert-success-color); }

/* ===== Detail grid ===== */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
.detail-item { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--detail-border); font-size: 14px; }
.detail-item .label { color: var(--detail-label); }
.detail-item .value { font-weight: 500; color: var(--detail-value); }
.detail-item.full { grid-column: 1 / -1; }

/* ===== Login page ===== */
.login-page { min-height: 100vh; display: flex; justify-content: center; align-items: center; background: var(--login-gradient); transition: background .3s; }
.login-card { background: var(--login-card-bg); border-radius: 12px; padding: 32px; width: 100%; max-width: 400px; box-shadow: var(--login-card-shadow); transition: background .3s, box-shadow .3s; }
.login-card h1 { text-align: center; margin-bottom: 4px; font-size: 22px; color: var(--text-heading); }
.login-card .subtitle { text-align: center; color: var(--stat-label-color); font-size: 13px; margin-bottom: 24px; }
.login-card .icon { text-align: center; font-size: 40px; margin-bottom: 12px; }
.login-card .form-group { margin-bottom: 16px; }
.login-card .form-group label { display: block; font-size: 13px; color: var(--stat-label-color); margin-bottom: 4px; }
.login-card .form-group input { width: 100%; padding: 8px 12px; border: 1px solid var(--input-border); border-radius: 6px; font-size: 14px; height: 40px; background: var(--input-bg); color: var(--input-color); transition: background .3s, border-color .3s, color .3s; }
.login-card .form-group input:focus { border-color: #40a9ff; outline: none; box-shadow: 0 0 0 2px rgba(24,144,255,.2); }
.login-card .btn-primary { width: 100%; padding: 8px; margin-top: 8px; justify-content: center; height: 40px; }
.footer-text { text-align: center; margin-top: 16px; font-size: 11px; color: var(--footer-text); }

/* ===== Modal ===== */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: var(--modal-overlay); z-index: 1000; justify-content: center; align-items: center; }
.modal-overlay.show { display: flex; }
.modal { background: var(--modal-bg); border-radius: 8px; width: 90%; max-width: 700px; max-height: 80vh; overflow-y: auto; box-shadow: 0 4px 20px rgba(0,0,0,.15); transition: background .3s; }
.modal-header { padding: 16px 20px; border-bottom: 1px solid var(--modal-border); display: flex; justify-content: space-between; align-items: center; transition: border-color .3s; }
.modal-header h3 { font-size: 16px; margin: 0; color: var(--text-heading); }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--stat-label-color); padding: 0 4px; line-height: 1; }
.modal-close:hover { color: var(--text-color); }
.modal-body { padding: 20px; }
.modal-footer { padding: 12px 20px; border-top: 1px solid var(--modal-border); text-align: right; display: flex; gap: 8px; justify-content: flex-end; transition: border-color .3s; }

/* ===== Loading ===== */
.loading { text-align: center; padding: 40px; color: var(--loading-color); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar-header h2, .sidebar-header .sub, .sidebar-nav a span:last-child, .sidebar-footer .user-name { display: none; }
  .sidebar-nav a { justify-content: center; padding: 12px; }
  .main-content { margin-left: 60px; padding: 16px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .form-row input[type="number"], .form-row input[type="text"] { width: 100%; }
}