/* ---------------------------------------------------------------------
   Southlink File Manager — design tokens
   Palette: near-black charcoal-blue base, single teal signal accent.
   Type: Space Grotesk (display) / Inter (UI) / JetBrains Mono (data)
--------------------------------------------------------------------- */
:root {
  --bg: #0b0f14;
  --surface: #121822;
  --surface-2: #171f2b;
  --surface-hover: #1c2534;
  --border: #232c3a;
  --text: #e8edf4;
  --text-dim: #8996a8;
  --text-faint: #5b6678;
  --accent: #2dd4bf;
  --accent-strong: #5eead4;
  --accent-glow: rgba(45, 212, 191, 0.16);
  --danger: #f87171;
  --danger-glow: rgba(248, 113, 113, 0.14);
  --warning: #f5b942;
  --radius: 10px;
  --radius-sm: 7px;
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, Segoe UI, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---------------------------------------------------------------------
   Brand mark
--------------------------------------------------------------------- */
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent) 0%, #1a8f82 100%);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.1em;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--text-faint);
}
.brand-stacked { justify-content: center; }

/* ---------------------------------------------------------------------
   Shared buttons
--------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--accent);
  color: #06201c;
}
.btn-primary:hover { background: var(--accent-strong); }

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-faint); }

.btn-small {
  padding: 6px 12px;
  font-size: 12px;
  background: var(--surface-2);
  color: var(--text-dim);
  border-color: var(--border);
}
.btn-small:hover { color: var(--text); border-color: var(--accent); }
.btn-copied { color: var(--accent) !important; border-color: var(--accent) !important; }

.btn-danger-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-faint);
  padding: 7px 9px;
}
.btn-danger-ghost:hover { color: var(--danger); border-color: var(--danger); background: var(--danger-glow); }

/* ---------------------------------------------------------------------
   Auth screen
--------------------------------------------------------------------- */
.auth-body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.grid-backdrop {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.35;
  mask-image: radial-gradient(circle at 50% 40%, black, transparent 70%);
}
.auth-wrap { position: relative; z-index: 1; text-align: center; }
.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 34px;
  width: 340px;
  text-align: left;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.auth-card .brand { justify-content: center; margin-bottom: 10px; }
.auth-sub {
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  margin: 0 0 24px;
}
.auth-form label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin: 14px 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.auth-form input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-body);
}
.auth-form input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.auth-form .btn { margin-top: 22px; }
.auth-footnote {
  margin-top: 18px;
  font-size: 12px;
  color: var(--text-faint);
}

/* ---------------------------------------------------------------------
   App shell — sidebar + main column
--------------------------------------------------------------------- */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 226px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 22px 14px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}
.sidebar-brand { padding: 0 8px; margin-bottom: 26px; }

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}
.sidebar-link svg { flex-shrink: 0; opacity: 0.85; }
.sidebar-link:hover { background: var(--surface-2); color: var(--text); }
.sidebar-link.active {
  background: var(--accent-glow);
  color: var(--accent);
}
.sidebar-link.active svg { opacity: 1; }

.sidebar-foot {
  border-top: 1px solid var(--border);
  padding-top: 14px;
  margin-top: 14px;
}
.sidebar-foot .status-pill { padding: 0 12px 10px; }
.sidebar-logout { color: var(--text-faint); }
.sidebar-logout:hover { color: var(--danger); background: var(--danger-glow); }

.status-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.main-col { flex: 1; min-width: 0; }

.page-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.page-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

/* ---------------------------------------------------------------------
   Layout
--------------------------------------------------------------------- */
.container { max-width: 980px; margin: 0 auto; padding: 28px 20px 60px; }
.container-narrow { max-width: 560px; }
.page-container { max-width: 980px; margin: 0 auto; padding: 26px 28px 60px; }

.quick-links-row { display: flex; gap: 10px; flex-wrap: wrap; }
.quick-links-row .btn { width: auto; }

.flash {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--text-dim);
}
.flash p { margin: 2px 0; }
.flash-error { border-left-color: var(--danger); }

/* ---------------------------------------------------------------------
   Stat cards
--------------------------------------------------------------------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 22px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}
.stat-unit { font-size: 13px; color: var(--text-dim); margin-left: 6px; font-family: var(--font-body); font-weight: 500; }

/* ---------------------------------------------------------------------
   Panels
--------------------------------------------------------------------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.panel-head .panel-title { margin: 0; }
.panel-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 16px;
  color: var(--text);
}
.panel-sub {
  font-size: 13px;
  color: var(--text-dim);
  margin: -8px 0 18px;
}

.live-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------------------------------------------------------------------
   Live usage panel
--------------------------------------------------------------------- */
.usage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.usage-item { display: flex; flex-direction: column; gap: 8px; }
.usage-row {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-dim);
}
.usage-bar {
  height: 6px;
  border-radius: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  overflow: hidden;
}
.usage-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-strong) 100%);
  transition: width 0.5s ease;
}
.usage-footnote {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--text-faint);
  font-family: var(--font-mono);
}

/* ---------------------------------------------------------------------
   Form fields
--------------------------------------------------------------------- */
.field-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  margin: 12px 0 6px;
}
.text-input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-body);
}
.text-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.text-input-small { padding: 6px 8px; font-size: 12.5px; width: 160px; }

.settings-form .btn { margin-top: 18px; }

/* ---------------------------------------------------------------------
   Upload dropzone
--------------------------------------------------------------------- */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 34px 20px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s ease, background 0.15s ease;
  margin-bottom: 6px;
}
.dropzone svg { color: var(--text-faint); margin-bottom: 4px; }
.dropzone-text { font-size: 14px; color: var(--text); }
.dropzone-text u { color: var(--accent); text-decoration: none; }
.dropzone-sub { font-size: 12px; color: var(--text-faint); font-family: var(--font-mono); }
.dropzone.dragging {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.dropzone.has-file { border-color: var(--accent); border-style: solid; }

/* ---------------------------------------------------------------------
   Manifest table
--------------------------------------------------------------------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left;
  padding: 0 10px 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}
td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--surface-hover); }

.mono { font-family: var(--font-mono); }
.dim { color: var(--text-dim); }

.gate-code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--surface-2);
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 3px 7px;
  border-radius: 5px;
  letter-spacing: 0.03em;
}

.file-name { color: var(--text); font-weight: 500; white-space: nowrap; }
.name-display { vertical-align: middle; }
.rename-btn {
  background: none;
  border: none;
  color: var(--text-faint);
  cursor: pointer;
  padding: 2px 4px;
  margin-left: 4px;
  vertical-align: middle;
  border-radius: 4px;
}
.rename-btn:hover { color: var(--accent); background: var(--surface-2); }
.rename-form { align-items: center; gap: 6px; }

.link-field { display: flex; gap: 6px; align-items: center; }
.link-box {
  width: 190px;
  padding: 6px 8px;
  font-size: 11.5px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
}
.link-box:focus { outline: none; border-color: var(--accent); }

.count-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--text);
}
.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-faint);
  transition: background 0.2s ease;
}
.pulse-dot.pulse-active {
  background: var(--accent);
  animation: pulse-ring 1.6s ease-out;
}
.pulse-dot.pulse-active-loop {
  background: var(--accent);
  animation: pulse-soft 2s ease-in-out infinite;
}
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 var(--accent-glow); }
  70%  { box-shadow: 0 0 0 8px rgba(45, 212, 191, 0); }
  100% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0); }
}
@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.empty-state {
  padding: 40px 10px;
  text-align: center;
  color: var(--text-dim);
}
.empty-state p { margin: 4px 0; }
.empty-state .dim { font-size: 13px; color: var(--text-faint); }

/* ---------------------------------------------------------------------
   Mobile menu controls (hidden on desktop)
--------------------------------------------------------------------- */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
}
.mobile-menu-btn:hover { background: var(--surface-2); }

.sidebar-close-btn {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
}
.sidebar-close-btn:hover { color: var(--text); background: var(--surface-2); }

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 40;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.sidebar-backdrop.visible { display: block; opacity: 1; }

/* ---------------------------------------------------------------------
   Responsive — sidebar becomes a slide-out drawer on small screens
--------------------------------------------------------------------- */
@media (max-width: 780px) {
  .page-topbar { display: flex; align-items: center; gap: 12px; }
  .mobile-menu-btn { display: inline-flex; }
  .sidebar-close-btn { display: inline-flex; }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 250px;
    max-width: 82vw;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 12px 0 40px rgba(0, 0, 0, 0.5);
  }
  .sidebar.mobile-open { transform: translateX(0); }

  .sidebar-brand { display: flex; align-items: center; }
}

@media (max-width: 640px) {
  .stats-row { grid-template-columns: 1fr; }
  .usage-grid { grid-template-columns: 1fr; }
  .link-box { width: 120px; }
  .page-topbar { padding: 14px 16px; }
  .page-container { padding: 20px 14px 40px; }
  .container { padding: 20px 12px 40px; }
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .pulse-dot.pulse-active,
  .pulse-dot.pulse-active-loop { animation: none; }
  * { transition: none !important; }
}