:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --border: #d9dee7;
  --accent: #285c86;
  --accent-hover: #1f4c70;
  --danger: #b42318;
  --danger-bg: #fff1f0;
  --success: #067647;
  --success-bg: #ecfdf3;
  --shadow: 0 24px 80px rgba(16, 24, 40, .10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.centered {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at top left, rgba(40, 92, 134, .10), transparent 34rem),
    linear-gradient(135deg, #f8fafc, var(--bg));
}

.card {
  width: min(92vw, 430px);
  padding: 38px 34px 34px;
  background: rgba(255, 255, 255, .96);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.brand { margin-bottom: 28px; text-align: center; }
.brand-title { margin: 0; font-size: 34px; line-height: 1.05; }
.brand-subtitle { margin: 7px 0 0; color: var(--muted); font-size: 17px; }
.brand-note { margin: 20px 0 0; color: var(--muted); }

label { display: block; margin: 16px 0 7px; color: var(--muted); font-size: 14px; font-weight: 700; }
input { width: 100%; padding: 13px 14px; border: 1px solid var(--border); border-radius: 8px; color: var(--text); font: inherit; }
input:focus { border-color: var(--accent); outline: 3px solid rgba(40, 92, 134, .14); }
select { width: 100%; padding: 13px 14px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); font: inherit; }
input[type="checkbox"] { width: auto; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 20px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
}
.button:hover, .button:focus-visible { background: var(--accent-hover); outline: none; }
.button.full { width: 100%; margin-top: 22px; }
.button.linklike { min-height: auto; padding: 0; background: none; color: var(--accent); }

.message { margin: 0 0 18px; padding: 12px 14px; border-radius: 8px; font-size: 14px; }
.message.error { border: 1px solid #fecdca; background: var(--danger-bg); color: var(--danger); }
.message.success { background: var(--success-bg); color: var(--success); }
.hint { margin-top: 12px; color: var(--muted); font-size: 12px; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px clamp(18px, 4vw, 42px);
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.site-brand strong { display: block; font-size: 24px; }
.site-brand span { color: var(--muted); font-size: 14px; }
.account { color: var(--muted); text-align: right; font-size: 14px; }
.account-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px; margin-top: 5px; }
.account a { color: var(--accent); font-weight: 700; text-decoration: none; }
.account form { display: inline; }

.content { width: min(1000px, 92vw); margin: 38px auto; }
.panel { padding: 28px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 18px 60px rgba(16,24,40,.08); }
.panel h1, .panel h2 { margin-top: 0; }
.panel p { color: var(--muted); }
.tools { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin-top: 22px; }
.tool { display: flex; align-items: center; gap: 20px; min-height: 150px; padding: 24px; overflow: hidden; border: 1px solid var(--border); border-radius: 14px; background: linear-gradient(135deg,#fff 20%,#f5faf9); color: var(--text); text-decoration: none; }
.tool:hover, .tool:focus-visible { border-color: var(--accent); box-shadow: 0 12px 28px rgba(40,92,134,.12); outline: none; transform: translateY(-1px); }
.tool strong { display: block; margin-bottom: 9px; }
.tool span { color: var(--muted); }
.tool-visual { display: grid; place-items: center; width: 88px; height: 88px; flex: 0 0 88px; border-radius: 22px; background: linear-gradient(145deg,#0f766e,#285c86); box-shadow: 0 14px 30px rgba(15,118,110,.24); }
.tool-visual svg { width: 58px; height: 58px; fill: rgba(255,255,255,.25); }
.tool-visual .tool-cross { fill: #fff; }
.tool-copy { display: block; }
.tool-copy strong { font-size: 21px; }
.tool-copy em { display: block; margin-top: 16px; color: var(--accent); font-size: 13px; font-style: normal; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; }
.tool:hover .tool-visual { transform: scale(1.04) rotate(-1deg); }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 22px; }
.toolbar h1 { margin: 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-size: 13px; }
.button.small { min-height: 36px; padding: 7px 12px; }
.button.secondary { background: #e8eef3; color: var(--accent); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
.checks { display: flex; gap: 22px; margin: 18px 0; }
.checks label { margin: 0; color: var(--text); }
.backlink { color: var(--accent); font-weight: 700; text-decoration: none; }
.users-content { width: min(1100px, 94vw); margin-top: 30px; }
.user-panel { margin-bottom: 20px; }
.user-create-grid { display: grid; grid-template-columns: 1fr 1.4fr 1fr 130px auto; gap: 10px; align-items: end; }
.check { display: flex; align-items: center; gap: 7px; min-height: 42px; margin: 0; color: var(--text); font-size: 13px; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.user-group { margin-top: 12px; overflow: hidden; border: 1px solid var(--border); border-radius: 9px; }
.user-group summary { padding: 14px 16px; background: #f8fafc; font-weight: 750; cursor: pointer; list-style: none; }
.user-group summary::-webkit-details-marker { display: none; }
.user-group summary::before { content: '▶'; display: inline-block; margin-right: 9px; font-size: 11px; transition: transform .15s; }
.user-group[open] summary::before { transform: rotate(90deg); }
.group-body { padding: 0 16px; }
.user-row { padding: 14px 0; border-top: 1px solid var(--border); }
.user-edit-form { display: grid; grid-template-columns: 1fr 1.4fr 130px 130px auto; gap: 10px; align-items: center; }
.password-row { display: flex; gap: 8px; margin-top: 8px; padding-left: calc(25% + 10px); }
.password-row input { min-width: 0; }
.meta { display: block; margin-top: 4px; color: var(--muted); font-size: 12px; }
.empty { padding: 8px 0; }
.button.danger-button { background: var(--danger); }

@media (max-width: 640px) {
  .site-header { align-items: flex-start; }
  .account-nav { flex-direction: column; align-items: flex-end; gap: 5px; }
  .form-grid { grid-template-columns: 1fr; }
  .tool { align-items: flex-start; }
  .tool-visual { width: 64px; height: 64px; flex-basis: 64px; border-radius: 16px; }
  .tool-visual svg { width: 43px; height: 43px; }
  .user-create-grid, .user-edit-form { grid-template-columns: 1fr 1fr; }
  .password-row { flex-direction: column; padding-left: 0; }
}