/* ==========================================================================
   LeanVPN design system -- shared by the public site and the admin panel.
   Pure black & white: white/gray for everything, red reserved exclusively
   for destructive actions and error/expired states.
   ========================================================================== */

:root {
  color-scheme: dark;

  --bg: #000000;
  --bg-raised: #0d0d0d;
  --bg-input: #0a0a0a;
  --bg-hover: #1a1a1a;

  --border: #262626;
  --border-strong: #404040;

  --text: #f5f5f5;
  --text-muted: #a3a3a3;
  --text-faint: #6b6b6b;

  --accent: #ffffff;
  --accent-text: #000000;
  --accent-hover: #d4d4d4;

  --danger: #ef4444;
  --danger-text: #fca5a5;
  --danger-border: #5c1f1f;
  --danger-bg: #1a0e0e;

  --radius: 0.75rem;
  --radius-pill: 999px;

  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ===== Base ===== */
* { box-sizing: border-box; }

html, body {
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--text);
  text-decoration-color: var(--border-strong);
}

a:hover {
  text-decoration-color: var(--text);
}

code {
  font-family: var(--font-mono);
  overflow-wrap: anywhere;
}

main {
  max-width: 1040px;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
}

/* ===== Header / nav (public site) ===== */
header.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
}

nav a:hover {
  color: var(--text);
}

.status-bar {
  padding: 0.5rem 1.5rem;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  color: var(--text-muted);
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem 2rem;
  font-size: 0.75rem;
  color: var(--text-faint);
  text-align: center;
}

/* Mobile burger nav (public site) */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 1, 1); white-space: nowrap; border: 0;
}

.nav-toggle {
  position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden;
}

.nav-burger {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border: 1px solid var(--border-strong); border-radius: 0.6rem;
  background: var(--bg-raised); cursor: pointer;
}

.nav-burger .burger-lines,
.nav-burger .burger-lines::before,
.nav-burger .burger-lines::after {
  content: ""; display: block; width: 20px; height: 2px; background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-burger .burger-lines::before { transform: translateY(-6px); }
.nav-burger .burger-lines::after { transform: translateY(6px); }

.nav-backdrop { display: none; }

@media (max-width: 768px) {
  .nav-burger { display: flex; position: relative; z-index: 25; }
  .nav-wrap { align-items: center; }

  /* header.site-header is `position: sticky`, so it's the positioning
     context here -- this makes the dropdown span the full header width
     and overlay the page instead of pushing content down. */
  .nav-wrap nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-top: 1px solid var(--border);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.6);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
    z-index: 20;
  }
  nav ul { flex-direction: column; align-items: stretch; padding: 0.5rem; gap: 0.15rem; }
  nav a {
    width: 100%;
    padding: 0.9rem 1rem;
    font-size: 1rem;
    border-radius: 0.5rem;
    display: block;
  }
  nav a:hover, nav a:active { background: var(--bg-hover); }
  .nav-toggle:checked ~ .nav-burger { border-color: var(--text-muted); }
  .nav-toggle:checked ~ .nav-burger .burger-lines { transform: rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger .burger-lines::before { transform: rotate(90deg); }
  .nav-toggle:checked ~ .nav-burger .burger-lines::after { transform: rotate(90deg); opacity: 0; }
  .nav-toggle:checked ~ nav { max-height: 80vh; overflow-y: auto; }
  .nav-toggle:checked ~ .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 15;
  }
}

/* ===== Header / nav (admin panel) ===== */
header.admin-header {
  background: var(--bg);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header.admin-header h1 {
  font-size: 1rem;
  margin: 0;
}

header.admin-header a { color: inherit; text-decoration: none; }

header.admin-header nav a {
  margin-left: 1rem;
  font-size: 0.9rem;
}

/* ===== Cards ===== */
.card {
  background: var(--bg-raised);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

.card h1 { font-size: 1.3rem; margin: 0 0 0.5rem; }
.card h2 { font-size: 1.1rem; margin: 0 0 0.5rem; }
.card h2:first-child, .card h1:first-child { margin-top: 0; }
.card h3 { font-size: 0.95rem; margin: 0 0 0.25rem; }
.card p { font-size: 0.9rem; line-height: 1.55; }

.card-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.card-row > .card {
  flex: 1;
  min-width: 200px;
  margin-bottom: 0;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text);
  font-size: 0.8rem;
  font-family: var(--font);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  background: var(--bg-hover);
  border-color: var(--text-muted);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-danger {
  border-color: var(--danger-border);
  color: var(--danger-text);
  background: transparent;
}

.btn-danger:hover {
  background: var(--danger-bg);
  border-color: var(--danger);
}

/* ===== Pills / status badges ===== */
.pill {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
}

.pill-active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  font-weight: 600;
}

.pill-expired {
  background: transparent;
  color: var(--text-faint);
  border-color: var(--border);
}

.badge-big {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  border: 1px solid var(--border-strong);
  background: var(--bg-raised);
}

.badge-big-ok {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  font-weight: 600;
}

.badge-big-warn {
  background: var(--danger-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
}

.status-dot {
  width: 10px; height: 10px; border-radius: 50%; display: inline-block;
  margin-right: 0.4rem;
}

.status-dot-ok { background: var(--text); }
.status-dot-warn { background: var(--text-faint); }
.status-dot-err { background: var(--danger); }

/* ===== Alerts ===== */
.alert {
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  border: 1px solid var(--border-strong);
  background: var(--bg-raised);
}

.alert-danger {
  border-color: var(--danger-border);
  background: var(--danger-bg);
  color: var(--danger-text);
}

/* ===== Tables ===== */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

th, td {
  padding: 0.5rem 0.5rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  overflow-wrap: anywhere;
}

th {
  color: var(--text-muted);
  font-weight: 500;
}

tr:hover td {
  background: var(--bg-hover);
}

/* ===== Forms ===== */
input, select, textarea {
  background: var(--bg-input);
  border-radius: 0.5rem;
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 0.45rem 0.6rem;
  font-size: 0.9rem;
  font-family: var(--font);
}

input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--text);
  outline-offset: 1px;
  border-color: var(--text);
}

label {
  display: block;
  font-size: 0.8rem;
  margin-bottom: 0.25rem;
  color: var(--text-muted);
}

.form-row { margin-bottom: 0.75rem; }
.form-row input, .form-row select { width: 100%; }
form.inline { display: inline; }

/* ===== Misc utilities ===== */
.text-muted { color: var(--text-muted); }
.text-faint { color: var(--text-faint); }
.text-danger { color: var(--danger-text); }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }
.mono { font-family: var(--font-mono); }
.list-plain { list-style: none; padding: 0; margin: 0; }

pre, .config-box {
  background: var(--bg-input);
  border-radius: var(--radius);
  padding: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  overflow-x: auto;
  color: var(--text);
  white-space: pre;
}

.secret-box {
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-family: var(--font-mono);
  padding: 1rem;
  border-radius: var(--radius);
  word-break: break-all;
  font-size: 1.1rem;
  font-weight: 600;
}

/* ===== Account page ===== */
.account-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1.5rem;
}

.account-sidebar {
  background: var(--bg-raised);
  border-radius: 1rem;
  border: 1px dashed var(--border-strong);
  padding: 1rem;
  font-size: 0.85rem;
  align-self: start;
}

.account-sidebar h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 1rem 0 0.25rem;
}

.account-sidebar h3:first-child { margin-top: 0; }
.account-sidebar ul { list-style: none; margin: 0; padding: 0; }
.account-sidebar li { margin: 0.15rem 0; }

.account-sidebar a {
  color: var(--text);
  text-decoration: none;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-pill);
  display: inline-block;
}

.account-sidebar a:hover { background: var(--bg-hover); }

.account-main { display: flex; flex-direction: column; gap: 1rem; }

.account-card {
  background: radial-gradient(circle at -10% -20%, rgba(255, 255, 255, 0.05), var(--bg-raised) 60%);
  border-radius: 1rem;
  border: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
}

.account-card h1, .account-card h2 { margin-top: 0; }

.account-summary {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.btn-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.75rem; }

.device-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  gap: 0.5rem;
}

.qr-frame {
  display: inline-block;
  background: #ffffff;
  padding: 0.75rem;
  border-radius: 0.5rem;
  line-height: 0;
}

@media (max-width: 800px) {
  .account-layout { grid-template-columns: 1fr; }
}

/* ===== Responsive ===== */
@media (max-width: 700px) {
  nav ul { flex-wrap: wrap; }
}