:root {
  color-scheme: light;
  font-family: Tahoma, "Segoe UI", Arial, sans-serif;
  color: #172033;
  background: #f4f6fa;
  --navy-950: #071426;
  --navy-900: #0d203b;
  --navy-800: #17345c;
  --blue-600: #2563eb;
  --blue-500: #3478f6;
  --cyan-400: #22d3d8;
  --violet-500: #705cf6;
  --slate-700: #334155;
  --slate-500: #64748b;
  --slate-300: #cbd5e1;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --border: #e2e8f0;
  --success: #0f9f6e;
  --danger: #c7362f;
  --shadow-sm: 0 8px 22px rgba(15, 31, 56, .07);
  --shadow-lg: 0 24px 70px rgba(15, 31, 56, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #f4f6fa; }
a { color: var(--blue-600); }
h1, h2, h3, p { margin-top: 0; }
h2 { margin-bottom: 7px; font-size: clamp(1.25rem, 2vw, 1.55rem); }
h3 { margin-bottom: 6px; }
p { line-height: 1.75; }

header {
  min-height: 70px;
  background: var(--navy-950);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 max(24px, calc((100% - 1180px) / 2));
}
header b { font-size: 24px; }
header small { display: block; opacity: .72; margin-top: 3px; }

.container { max-width: 1180px; margin: 28px auto; padding: 0 18px; }
.login { width: min(440px, calc(100% - 32px)); margin: 7vh auto; }
.login .brand { justify-content: center; flex-direction: column; text-align: center; }
.shield { width: 76px; height: 76px; display: grid; place-items: center; border-radius: 24px; color: #fff; font-size: 32px; font-weight: 800; background: linear-gradient(135deg, var(--blue-500), var(--cyan-400)); box-shadow: var(--shadow-lg); }

.card, .card2 {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.card2 { background: #fbfcfe; margin: 16px 0; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.formgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
label { display: block; font-size: 13px; font-weight: 700; color: var(--slate-700); }
input, select, textarea, button { font: inherit; }
input, select, textarea {
  width: 100%;
  margin-top: 7px;
  padding: 12px 13px;
  border: 1px solid var(--slate-300);
  border-radius: 11px;
  background: #fff;
  color: #172033;
  transition: border-color .18s, box-shadow .18s, background .18s;
}
input:focus, select:focus, textarea:focus { outline: 0; border-color: var(--blue-500); box-shadow: 0 0 0 4px rgba(52, 120, 246, .13); }
textarea { resize: vertical; line-height: 1.6; }
.wide { grid-column: 1 / -1; }
button {
  border: 0;
  border-radius: 11px;
  padding: 11px 17px;
  background: var(--blue-600);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  transition: transform .16s, box-shadow .16s, opacity .16s;
}
button:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(37, 99, 235, .23); }
button:active:not(:disabled) { transform: translateY(0); }
button:disabled { cursor: not-allowed; opacity: .55; }
.ghost { background: transparent; border: 1px solid #64748b; }
.danger { background: var(--danger); }
.pill { padding: 7px 11px; border-radius: 999px; background: #e8edf5; }
.pill.ok { background: #d9fbe8; color: #067647; }
.pill.bad { background: #fee4e2; color: #b42318; }
.meter { height: 8px; background: #e9edf4; border-radius: 999px; overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--blue-600); }
.error { color: #b42318; font-weight: 700; }
pre { direction: ltr; text-align: left; white-space: pre-wrap; background: #101827; color: #d7e0ef; padding: 14px; border-radius: 10px; max-height: 230px; overflow: auto; }
.toast { position: fixed; left: 24px; bottom: 24px; background: #111827; color: #fff; padding: 14px 18px; border-radius: 10px; opacity: 0; transform: translateY(20px); transition: .2s; }
.toast.show { opacity: 1; transform: none; }
.actions span { font-family: monospace; font-size: 11px; word-break: break-all; }

/* Admin workspace */
.admin-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 92% 4%, rgba(34, 211, 216, .14), transparent 27rem),
    radial-gradient(circle at 8% 18%, rgba(112, 92, 246, .10), transparent 24rem),
    #f3f6fb;
  color: #172033;
}
.admin-page .topbar {
  min-height: 84px;
  position: relative;
  padding: 13px max(24px, calc((100% - 1320px) / 2));
  background: linear-gradient(110deg, #071426 0%, #102a4c 58%, #12385f 100%);
  border-bottom: 1px solid rgba(255,255,255,.1);
  box-shadow: 0 10px 34px rgba(5, 17, 35, .2);
}
.admin-page .brand { display: flex; align-items: center; gap: 13px; }
.admin-page .brand img { width: 52px; height: 52px; border-radius: 16px; object-fit: cover; border: 1px solid rgba(255,255,255,.22); box-shadow: 0 8px 24px rgba(0,0,0,.22); }
.admin-page .brand b { letter-spacing: .02em; }
.admin-page .topbar-actions { display: flex; align-items: center; gap: 12px; }
.admin-page .secure-indicator { display: flex; align-items: center; gap: 8px; color: #dce9fa; font-size: .84rem; }
.admin-page .secure-indicator i { width: 8px; height: 8px; border-radius: 50%; background: #35d398; box-shadow: 0 0 0 5px rgba(53, 211, 152, .12); }
.admin-page .topbar .ghost { border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.08); backdrop-filter: blur(8px); }
.admin-page .container { max-width: 1320px; margin: 0 auto; padding: 26px 24px 54px; }

.admin-page .admin-hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  overflow: hidden;
  position: relative;
  padding: 27px 30px;
  margin-bottom: 18px;
  border: 1px solid rgba(37, 99, 235, .12);
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(120deg, #102a4c 0%, #16447a 62%, #156e82 100%);
  box-shadow: var(--shadow-lg);
}
.admin-page .admin-hero::after { content: ""; position: absolute; width: 260px; height: 260px; left: -70px; top: -135px; border: 42px solid rgba(64, 222, 225, .12); border-radius: 50%; }
.admin-page .admin-hero h1 { margin: 5px 0 6px; font-size: clamp(1.55rem, 3vw, 2.3rem); }
.admin-page .admin-hero p { margin: 0; color: #d7e6f8; }
.admin-page .eyebrow { color: #71eef0; font-size: .78rem; font-weight: 800; letter-spacing: .08em; }
.admin-page .hero-badge { flex: 0 0 auto; min-width: 116px; padding: 13px 18px; border: 1px solid rgba(255,255,255,.18); border-radius: 18px; background: rgba(5,20,40,.28); backdrop-filter: blur(10px); text-align: center; z-index: 1; }
.admin-page .hero-badge span { display: block; color: #bcd0e8; font-size: .76rem; }
.admin-page .hero-badge b { display: block; margin-top: 4px; color: #4ee0ae; font-size: 1.15rem; }

.admin-page .admin-tabs {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 9px;
  overflow: visible;
  position: sticky;
  top: 10px;
  z-index: 20;
  margin: 0 0 22px;
  padding: 9px;
  border: 1px solid rgba(203, 213, 225, .85);
  border-radius: 19px;
  background: rgba(255,255,255,.88);
  box-shadow: 0 12px 38px rgba(15, 31, 56, .09);
  backdrop-filter: blur(18px);
}
.admin-page .admin-tabs button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  white-space: nowrap;
  border: 1px solid transparent;
  background: transparent;
  color: #516177;
  box-shadow: none;
}
.admin-page .admin-tabs button::before { content: attr(data-icon); display: grid; place-items: center; width: 26px; height: 26px; border-radius: 9px; color: #41658f; background: #eaf1fa; font-size: .68rem; }
.admin-page .admin-tabs button:hover { color: #183a66; background: #f2f6fb; box-shadow: none; }
.admin-page .admin-tabs button.active { color: #fff; background: linear-gradient(135deg, var(--blue-600), #3158d8); box-shadow: 0 10px 24px rgba(37, 99, 235, .25); }
.admin-page .admin-tabs button.active::before { color: #fff; background: rgba(255,255,255,.17); }
.admin-page .tab-panel { animation: adminFade .22s ease-out; }
@keyframes adminFade { from { opacity: .35; transform: translateY(5px); } to { opacity: 1; transform: none; } }

.admin-page .card {
  padding: clamp(19px, 3vw, 28px);
  border-color: rgba(214, 223, 235, .9);
  border-radius: 22px;
  box-shadow: 0 14px 42px rgba(15, 31, 56, .075);
}
.admin-page .card > .row:first-child { padding-bottom: 17px; margin-bottom: 20px; border-bottom: 1px solid #edf1f6; }
.admin-page .card > .row:first-child p { margin: 5px 0 0; color: var(--slate-500); }
.admin-page .card h2 { color: #142947; }
.admin-page .card2 {
  padding: 20px;
  border-color: #dde5ef;
  border-radius: 18px;
  background: linear-gradient(180deg, #fff, #fbfdff);
  box-shadow: 0 7px 22px rgba(15, 31, 56, .055);
}
.admin-page .formgrid { gap: 17px; padding: 3px 0; }
.admin-page input, .admin-page select, .admin-page textarea { min-height: 46px; border-color: #d5deea; background: #fbfdff; }
.admin-page textarea { min-height: 102px; }
.admin-page .formgrid > button.wide { min-height: 50px; margin-top: 4px; background: linear-gradient(135deg, var(--blue-600), #3057d6); }
.admin-page button.ghost { color: #36506f; border-color: #c7d2df; background: #fff; }
.admin-page .topbar button.ghost { color: #fff; }
.admin-page .danger { background: #c7362f; }
.admin-page .hint { color: #65758b; line-height: 1.7; }
.admin-page .sub-list { gap: 13px; }
.admin-page .sub-row { padding: 17px; border-color: #dde5ef; border-radius: 17px; background: linear-gradient(180deg, #fbfdff, #f7fafd); }
.admin-page .sub-row:hover { border-color: #c7d6e8; }
.admin-page .actions { justify-content: flex-start; padding-top: 12px; border-top: 1px solid #e9eef5; }
.admin-page .actions button, .admin-page .actions select, .admin-page .actions input { width: auto; max-width: 100%; margin-top: 0; }
.admin-page .actions select { min-width: 180px; }
.admin-page pre { border: 1px solid #243753; border-radius: 14px; background: #0b1729; color: #c9d8ed; box-shadow: inset 0 1px 0 rgba(255,255,255,.04); }
.admin-page .log-box { margin: 15px 0; border: 1px solid #dce5ef; border-radius: 14px; background: #f7fafd; }
.admin-page .log-box summary { padding: 13px 15px; color: #36506f; font-weight: 700; cursor: pointer; }
.admin-page .log-box pre { margin: 0 12px 12px; }
.admin-page .diagnostics { border: 1px solid #d7e6f7; background: #f1f7fe; }
.admin-page .pill, .admin-page .status-pill, .admin-page .platform-status { border: 1px solid transparent; }
.admin-page .stat-grid { gap: 13px; }
.admin-page .stat { min-height: 86px; padding: 15px; border-color: #e0e7f0; background: #f8fbff; }
.admin-page .stat b { color: #173d70; font-size: 1.28rem; }
.admin-page .usage-track { height: 8px; background: #e6edf6; }
.admin-page .usage-track i { background: linear-gradient(90deg, var(--blue-500), var(--cyan-400)); }
.admin-page .node-grid { gap: 17px; }
.admin-page .download-grid { gap: 16px; }
.admin-page .download-item { display: flex; flex-direction: column; min-height: 260px; padding: 21px; border-color: #dce5f0; border-radius: 19px; background: linear-gradient(160deg, #fff 20%, #f4f8fd); }
.admin-page .download-item h3 { color: #17345c; font-size: 1.22rem; }
.admin-page .download-item p { flex: 1; color: #64748b; }
.admin-page .download-item a { margin-top: 9px; background: linear-gradient(135deg, var(--blue-600), #3158d8); }
.admin-page .drive-card { border-color: #cbdcf1; border-radius: 19px; background: linear-gradient(135deg, #f8fbff, #eef6ff); }
.admin-page .privacy-note { border: 1px solid #d8e7f6; }
.admin-page .server-access-box { border-color: #cbdcf1; background: #f2f7fd; }
.admin-page .toast { left: 24px; right: auto; bottom: 24px; z-index: 100; max-width: min(430px, calc(100% - 48px)); border: 1px solid rgba(255,255,255,.12); border-radius: 14px; background: #0b1729; box-shadow: 0 18px 45px rgba(5,17,35,.28); }

@media (max-width: 900px) {
  .formgrid { grid-template-columns: 1fr; }
  .wide { grid-column: auto; }
  .admin-page .admin-tabs { grid-template-columns: repeat(5, 150px); overflow-x: auto; justify-content: start; }
  .admin-page .node-grid { grid-template-columns: 1fr; }
  .admin-page .stat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 650px) {
  .admin-page .topbar { min-height: 74px; padding: 11px 15px; }
  .admin-page .brand img { width: 44px; height: 44px; }
  .admin-page .brand b { font-size: 20px; }
  .admin-page .brand small, .admin-page .secure-indicator { display: none; }
  .admin-page .topbar .ghost { padding: 9px 11px; }
  .admin-page .container { padding: 16px 12px 40px; }
  .admin-page .admin-hero { align-items: flex-start; padding: 21px; border-radius: 20px; }
  .admin-page .admin-hero p { font-size: .88rem; }
  .admin-page .hero-badge { display: none; }
  .admin-page .admin-tabs { top: 4px; margin-bottom: 16px; grid-template-columns: repeat(5, 132px); border-radius: 16px; }
  .admin-page .admin-tabs button { min-height: 43px; padding: 8px 10px; font-size: .84rem; }
  .admin-page .card { padding: 17px; border-radius: 18px; }
  .admin-page .stat-grid { grid-template-columns: 1fr; }
  .admin-page .actions { align-items: stretch; }
  .admin-page .actions button, .admin-page .actions select, .admin-page .actions input { width: 100%; }
  .admin-page .repair-box { width: 100%; flex-direction: column; align-items: stretch; }
  .admin-page .repair-box input, .admin-page .repair-box button { width: 100%; min-width: 0; }
  .admin-page .download-grid { grid-template-columns: 1fr; }
}