:root {
  --ink: #0F1218;
  --cyan: #00E5FF;
  --cyan-dark: #00B8D4;
  --white: #FFFFFF;
  --gray-100: #F2F4F7;
  --gray-500: #5B6573;
}

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

body {
  font: 14px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  background: var(--gray-100);
  color: var(--ink);
  min-height: 100vh;
}

input, select, textarea, button { font: inherit; outline: none; }

.btn {
  background: var(--cyan);
  color: var(--ink);
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  border: none;
  cursor: pointer;
  display: inline-block;
  text-align: center;
  transition: all 0.2s;
}
.btn:hover {
  background: var(--cyan-dark);
  box-shadow: 0 2px 8px rgba(0, 229, 255, 0.3);
}

.btn-sm { padding: 7px 16px; font-size: 12px; }
.btn-r  { background: #E53935; color: var(--white); }
.btn-r:hover { background: #C62828; }
.btn-g  { background: #2E7D32; color: var(--white); }
.btn-g:hover { background: #1B5E20; }
.btn-o  { background: #F57C00; color: var(--white); }
.btn-o:hover { background: #E65100; }

#login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--ink), #006478, var(--cyan-dark));
}
#login > div {
  background: var(--white);
  border-radius: 16px;
  padding: 40px;
  width: 400px;
  max-width: 90vw;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}
#login h1 { font-size: 22px; font-weight: 800; margin-bottom: 4px; }
#login h1 span { color: var(--cyan-dark); }
#login > div > p { color: var(--gray-500); font-size: 13px; margin-bottom: 24px; }
#login input {
  display: block;
  width: 100%;
  padding: 12px;
  border: 2px solid var(--gray-100);
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 12px;
  transition: border 0.2s;
}
#login input:focus { border-color: var(--cyan-dark); }

#app { display: none; min-height: 100vh; }

#sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 220px;
  background: var(--ink);
  color: var(--white);
  z-index: 100;
  overflow-y: auto;
  box-shadow: 2px 0 12px rgba(0, 0, 0, 0.1);
}
#sidebar .logo {
  padding: 20px 16px 12px;
  font-size: 16px;
  font-weight: 800;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  align-items: center;
  gap: 8px;
}
#sidebar .logo span { color: var(--cyan); }
#sidebar .user { font-size: 11px; color: #94A3B8; padding: 10px 16px; border-bottom: 1px solid rgba(255, 255, 255, .05); }
#sidebar a {
  display: block;
  padding: 12px 16px;
  color: #CBD5E1;
  text-decoration: none;
  font-size: 13px;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.15s;
}
#sidebar a:hover { background: rgba(0, 229, 255, .1); color: var(--white); }
#sidebar a.active {
  background: rgba(0, 229, 255, .2);
  color: var(--cyan);
  border-left-color: var(--cyan);
  font-weight: 600;
}
#sidebar .logout { position: absolute; bottom: 16px; left: 16px; right: 16px; }

#main { margin-left: 220px; padding: 24px; min-height: 100vh; }

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0 16px;
  border-bottom: 2px solid var(--gray-100);
  margin-bottom: 20px;
}
.top h2 { font-size: 20px; font-weight: 700; }

.card {
  background: var(--white);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid #E8ECF1;
  overflow-x: auto;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}
.card h3 { font-size: 16px; font-weight: 700; margin-bottom: 12px; }

table { width: 100%; border-collapse: collapse; }
th, td {
  padding: 8px 10px;
  font-size: 13px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: top;
}
th {
  background: var(--gray-100);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--gray-500);
  white-space: nowrap;
}
tr:hover { background: #FAFBFC; }

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}
.badge.g { background: #E8F5E9; color: #2E7D32; }
.badge.a { background: #FFF3E0; color: #E65100; }
.badge.r { background: #FFEBEE; color: #C62828; }
.badge.b { background: #E3F2FD; color: #1565C0; }
.badge.w { background: #F5F5F5; color: #757575; }

.fr { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; align-items: center; }
.fr input, .fr select {
  padding: 8px 12px;
  border: 1px solid var(--gray-100);
  border-radius: 8px;
  font-size: 13px;
  background: var(--white);
}
.fr input { min-width: 200px; }

.tr-red { background: #FFF5F5; }
.tr-red td { border-bottom-color: #FECACA; color: #991B1B; }
.tr-amber { background: #FFFBEB; }
.tr-amber td { border-bottom-color: #FDE68A; color: #92400E; }
.tr-green { background: #F0FDF4; }
.tr-green td { border-bottom-color: #BBF7D0; color: #065F46; }

.sec-h {
  background: var(--cyan);
  color: var(--ink);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  display: inline-block;
  margin: 16px 0 8px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--white);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--gray-100);
  text-align: center;
}
.stat-card .num { font-size: 28px; font-weight: 800; margin: 4px 0; }
.stat-card .lb { font-size: 12px; color: var(--gray-500); }
.stat-card.sg .num { color: #10B981; }
.stat-card.sr .num { color: #EF4444; }
.stat-card.sb .num { color: var(--cyan); }
.stat-card.sa .num { color: #F59E0B; }

.chat-box {
  height: 280px;
  overflow-y: auto;
  border: 1px solid var(--gray-100);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 12px;
  background: #FAFBFC;
}
.msg {
  padding: 8px 12px;
  border-radius: 10px;
  margin-bottom: 8px;
  max-width: 85%;
  font-size: 13px;
  line-height: 1.4;
}
.msg.u { margin-left: auto; background: var(--cyan); color: var(--ink); }
.msg.b { background: var(--gray-100); color: var(--ink); }
.msg .nm { font-size: 10px; color: var(--gray-500); margin-bottom: 2px; }

.chat-inp { display: flex; gap: 8px; }
.chat-inp input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--gray-100);
  border-radius: 8px;
  font-size: 13px;
}
.chat-q { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.chat-q button {
  padding: 6px 12px;
  border: 1px solid var(--gray-100);
  border-radius: 100px;
  font-size: 11px;
  background: var(--white);
  cursor: pointer;
  color: var(--ink);
}
.chat-q button:hover {
  background: var(--cyan);
  color: var(--ink);
  border-color: var(--cyan);
}

.rank-bar {
  height: 8px;
  border-radius: 4px;
  background: var(--gray-100);
  overflow: hidden;
  margin-top: 4px;
}
.rank-bar > div { height: 100%; border-radius: 4px; transition: width .3s; }

.sub-row { font-size: 12px; color: var(--gray-500); cursor: pointer; user-select: none; }
.sub-row:hover { color: var(--cyan-dark); }
.sub-row .arr { display: inline-block; width: 16px; text-align: center; }
.sub-items { padding-left: 24px; }
.sub-item { font-size: 12px; padding: 4px 0; border-bottom: 1px solid var(--gray-100); }
.sub-item:last-child { border: none; }

.mod-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, .5);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
}
.mod-box {
  background: var(--white);
  border-radius: 16px;
  padding: 28px;
  max-width: 750px;
  width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  background: #F8FAFC;
  border-radius: 6px;
  margin: 4px 0;
  border: 1px solid var(--gray-100);
  flex-wrap: wrap;
}
.file-item .fn { font-size: 12px; flex: 1; min-width: 80px; }
.file-item .fs { font-size: 10px; color: var(--gray-500); }
.file-item a { font-size: 11px; color: var(--cyan-dark); cursor: pointer; text-decoration: underline; }

.stor-bar { font-size: 11px; color: var(--gray-500); padding: 4px 0; }

@media (max-width: 768px) {
  #sidebar { width: 56px; }
  #sidebar .logo span, #sidebar a span, #sidebar .user { display: none; }
  #main { margin-left: 56px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}