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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2a2d3a;
  --text: #e2e8f0;
  --muted: #8892a4;
  --accent: #6366f1;
  --accent-hover: #4f52d9;
  --danger: #ef4444;
  --success: #22c55e;
  --warn: #f59e0b;
  --radius: 10px;
  --tap: 44px; /* Apple HIG minimum touch target */
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

.hidden { display: none !important; }

.error {
  background: rgba(239,68,68,.12);
  border: 1px solid rgba(239,68,68,.3);
  color: #fca5a5;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 12px;
  font-size: 14px;
}

.success {
  background: rgba(34,197,94,.12);
  border: 1px solid rgba(34,197,94,.3);
  color: #86efac;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 12px;
  font-size: 14px;
}

/* ---- Login ---- */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100svh;
  padding: 24px 20px;
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  width: 100%;
  max-width: 360px;
}

.login-card h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 28px;
  text-align: center;
  letter-spacing: -.3px;
}

.login-card input {
  display: block;
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 13px 14px;
  margin-bottom: 12px;
  font-size: 16px; /* prevents iOS zoom on focus */
  -webkit-appearance: none;
}

.login-card input:focus { outline: none; border-color: var(--accent); }
.login-card button { width: 100%; margin-top: 8px; height: var(--tap); font-size: 16px; }

/* ---- Buttons ---- */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0 20px;
  height: var(--tap);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { opacity: .85; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.btn-sm {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 0 16px;
  height: var(--tap);
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  -webkit-tap-highlight-color: transparent;
}
.btn-sm:hover { border-color: var(--muted); }

.btn-danger {
  background: transparent;
  border: 1px solid rgba(239,68,68,.4);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 0 14px;
  height: var(--tap);
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  -webkit-tap-highlight-color: transparent;
}
.btn-danger:hover { background: rgba(239,68,68,.1); }
.btn-danger:active { background: rgba(239,68,68,.2); }

.btn-qr {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: var(--radius);
  width: var(--tap);
  height: var(--tap);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.btn-qr:hover { color: var(--text); border-color: var(--muted); }
.btn-qr:active { background: rgba(255,255,255,.06); }

.action-cell { display: flex; align-items: center; gap: 8px; }

/* ---- Header ---- */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: env(safe-area-inset-top);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
  height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo { font-weight: 700; font-size: 16px; flex-shrink: 0; letter-spacing: -.2px; }

#stats-bar {
  flex: 1;
  color: var(--muted);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---- Header actions ---- */
.header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: var(--radius);
  width: var(--tap);
  height: var(--tap);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.btn-icon:hover { color: var(--text); border-color: var(--muted); }

/* ---- Settings dropdown ---- */
#settings-menu-wrap { position: relative; }

.dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 180px;
  box-shadow: 0 8px 32px rgba(0,0,0,.5);
  z-index: 200;
  padding: 4px 0;
}

.dropdown-item {
  display: block;
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 0 16px;
  height: var(--tap);
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  -webkit-tap-highlight-color: transparent;
}
.dropdown-item:hover { background: rgba(255,255,255,.06); }

/* ---- Main ---- */
main {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px;
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.toolbar h2 { font-size: 18px; font-weight: 700; letter-spacing: -.2px; }

/* ---- Status dot ---- */
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.dot.online { background: var(--success); box-shadow: 0 0 6px var(--success); }
.dot.offline { background: var(--border); }

/* ---- Quota bar ---- */
.quota-wrap { display: flex; flex-direction: column; gap: 4px; min-width: 100px; }
.quota-bar-bg { background: var(--border); border-radius: 4px; height: 4px; overflow: hidden; }
.quota-bar-fill { height: 100%; border-radius: 4px; background: var(--accent); transition: width .3s; }
.quota-bar-fill.warn { background: var(--warn); }
.quota-bar-fill.danger { background: var(--danger); }
.quota-label { font-size: 12px; color: var(--muted); }

/* ---- Table (desktop) ---- */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

thead th {
  background: var(--bg);
  padding: 10px 14px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  border-bottom: 1px solid var(--border);
}

tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: rgba(255,255,255,.02); }
td { padding: 10px 14px; vertical-align: middle; }
.loading { text-align: center; color: var(--muted); padding: 40px !important; }

/* row-name: shown only in mobile status cell, hidden on desktop */
.row-name { display: none; }
@media (min-width: 641px) { .row-name { display: none !important; } }

/* ---- Mobile: card layout ---- */
@media (max-width: 640px) {
  /* Switch to card layout */
  table, thead, tbody, tr, td, th { display: block; }
  thead tr { display: none; }

  table {
    background: transparent;
    border: none;
    border-radius: 0;
    overflow: visible;
  }

  tbody tr {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 10px;
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  tbody tr:last-child { margin-bottom: 0; }

  /* Hide desktop-only columns: name (shown inline), upload, download */
  td.col-name,
  td:nth-child(3),
  td:nth-child(4) { display: none; }

  /* Status cell: dot + name inline */
  td:nth-child(1) {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0;
    font-size: 16px;
    font-weight: 600;
  }

  .row-name { display: inline; }

  td:nth-child(5) { padding: 0; }
  td:nth-child(6) { padding: 0; }

  /* Full-width action buttons */
  .btn-danger { flex: 1; justify-content: center; }
  .btn-qr { flex-shrink: 0; }
}

/* ---- Modal ---- */
#modal-overlay,
#chpw-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.65);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 100;
  padding: 0;
}

@media (min-width: 480px) {
  #modal-overlay,
  #chpw-overlay {
    align-items: center;
  }
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px 16px 0 0;
  padding: 28px 24px;
  padding-bottom: max(28px, env(safe-area-inset-bottom));
  width: 100%;
  max-width: 480px;
}

@media (min-width: 480px) {
  .modal {
    border-radius: 16px;
    max-width: 400px;
  }
}

/* Drag handle hint on mobile */
.modal::before {
  content: '';
  display: block;
  width: 36px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin: -12px auto 20px;
}

@media (min-width: 480px) {
  .modal::before { display: none; }
}

.modal h3 { font-size: 18px; font-weight: 700; margin-bottom: 20px; letter-spacing: -.2px; }

.modal label {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 14px;
}

.modal label input {
  display: block;
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 13px 14px;
  margin-top: 6px;
  font-size: 16px; /* prevents iOS zoom */
  -webkit-appearance: none;
}
.modal label input:focus { outline: none; border-color: var(--accent); }

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 24px;
}

@media (max-width: 479px) {
  .modal-actions {
    flex-direction: column-reverse;
  }
  .modal-actions .btn-primary,
  .modal-actions .btn-sm {
    width: 100%;
    justify-content: center;
  }
}