/* ═══════════════════════════════════════════════════
   B4S Design System — Base Styles
   ═══════════════════════════════════════════════════ */

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

:root {
  /* ── Palette ── */
  --bg:           #080b11;
  --bg-2:         #0d1118;
  --surface:      #111620;
  --surface-2:    #161c2a;
  --border:       #1e2538;
  --border-2:     #252d42;

  --accent:       #00b4d8;
  --accent-dark:  #0090ae;
  --accent-dim:   rgba(0, 180, 216, .12);
  --accent-glow:  rgba(0, 180, 216, .25);

  --text:         #c8d0e7;
  --text-2:       #8895b3;
  --text-muted:   #4a5568;

  --error:        #e63946;
  --error-dim:    rgba(230, 57, 70, .12);
  --success:      #2ec4b6;
  --success-dim:  rgba(46, 196, 182, .12);
  --warn:         #f0a500;
  --warn-dim:     rgba(240, 165, 0, .12);

  /* ── Typography ── */
  --font:         'Courier New', 'Lucida Console', monospace;

  /* ── Layout ── */
  --header-h:     58px;
  --content-max:  1280px;
  --sidebar-w:    240px;

  /* ── Effects ── */
  --shadow-sm:    0 2px 8px rgba(0,0,0,.35);
  --shadow-md:    0 4px 20px rgba(0,0,0,.5);
  --shadow-lg:    0 8px 40px rgba(0,0,0,.65);
  --transition:   .2s ease;
}

/* ── Reset & Base ─────────────────────────────────── */

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: .8; }

img { max-width: 100%; display: block; }

/* ── Typography ───────────────────────────────────── */

h1, h2, h3, h4, h5 { color: var(--text); font-family: var(--font); font-weight: 700; }
h1 { font-size: 22px; letter-spacing: 4px; }
h2 { font-size: 18px; letter-spacing: 2px; }
h3 { font-size: 15px; letter-spacing: 1px; }
h4 { font-size: 13px; letter-spacing: .5px; }

.text-muted  { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.text-error  { color: var(--error); }
.text-success{ color: var(--success); }
.text-warn   { color: var(--warn); }

/* ── Cards ────────────────────────────────────────── */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover::before { opacity: 1; }

.card--accent::before { opacity: 1; }
.card--error::before  { background: linear-gradient(90deg, transparent, var(--error), transparent); opacity: 1; }
.card--warn::before   { background: linear-gradient(90deg, transparent, var(--warn), transparent); opacity: 1; }
.card--success::before{ background: linear-gradient(90deg, transparent, var(--success), transparent); opacity: 1; }

.card-body { padding: var(--space-6, 24px) var(--space-8, 32px); }
.card-body-sm { padding: 16px 20px; }

/* ── Buttons ──────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  padding: 10px 20px;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:disabled { opacity: .45; cursor: default; pointer-events: none; }

.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-dark);
  box-shadow: 0 0 16px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--accent-dim);
  box-shadow: 0 0 12px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-ghost:hover:not(:disabled) { border-color: var(--text-2); color: var(--text); }

.btn-danger {
  background: var(--error);
  border: none;
  color: #fff;
}
.btn-danger:hover:not(:disabled) { opacity: .85; box-shadow: 0 0 12px rgba(230,57,70,.3); }

.btn-sm { padding: 6px 14px; font-size: 11px; letter-spacing: 1px; }
.btn-lg { padding: 14px 28px; font-size: 13px; }

/* ── Forms ────────────────────────────────────────── */

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.form-label .required { color: var(--error); margin-left: 2px; }

.form-input {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  font-family: var(--font);
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

.form-input::placeholder { color: var(--text-muted); }
.form-input.is-error { border-color: var(--error); }
.form-input.is-error:focus { box-shadow: 0 0 0 2px var(--error-dim); }

.form-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-2);
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}
.form-input-wrap:focus-within { border-color: var(--accent); }
.form-input-wrap .form-input {
  border: none;
  background: transparent;
  box-shadow: none;
}
.form-input-wrap .form-input:focus { box-shadow: none; }

.input-action {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0 12px;
  font-size: 16px;
  cursor: pointer;
  transition: color var(--transition);
  flex-shrink: 0;
}
.input-action:hover { color: var(--text); }

/* ── Alerts ───────────────────────────────────────── */

.alert {
  padding: 10px 14px;
  font-size: 12px;
  border-left: 3px solid;
  line-height: 1.6;
}

.alert-error   { background: var(--error-dim);   border-color: var(--error);   color: var(--error); }
.alert-success { background: var(--success-dim); border-color: var(--success); color: var(--success); }
.alert-warn    { background: var(--warn-dim);    border-color: var(--warn);    color: var(--warn); }
.alert-info    { background: var(--accent-dim);  border-color: var(--accent);  color: var(--accent); }

/* ── Badges ───────────────────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 10px;
  letter-spacing: .8px;
  text-transform: uppercase;
  border: 1px solid;
  white-space: nowrap;
}

.badge-success { background: var(--success-dim); border-color: rgba(46,196,182,.35); color: var(--success); }
.badge-error   { background: var(--error-dim);   border-color: rgba(230,57,70,.35);  color: var(--error); }
.badge-warn    { background: var(--warn-dim);     border-color: rgba(240,165,0,.35);  color: var(--warn); }
.badge-accent  { background: var(--accent-dim);   border-color: rgba(0,180,216,.35);  color: var(--accent); }
.badge-muted   { background: rgba(74,85,104,.15); border-color: rgba(74,85,104,.4);   color: var(--text-muted); }

/* ── Tables ───────────────────────────────────────── */

.table-wrap { overflow-x: auto; }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.table th {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 9px 14px;
  text-align: left;
  font-size: 10px;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.table td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  vertical-align: middle;
  transition: background var(--transition);
}

.table tbody tr:hover td { background: rgba(255,255,255,.025); }

/* ── Divider ──────────────────────────────────────── */

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── Modals ───────────────────────────────────────── */

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.75);
  z-index: 500;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 32px;
  width: 100%;
  max-width: 420px;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.modal::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.modal--danger::before { background: linear-gradient(90deg, transparent, var(--error), transparent); }

.modal-title { font-size: 15px; letter-spacing: 1px; margin-bottom: 8px; }
.modal-body  { color: var(--text-muted); font-size: 12px; line-height: 1.7; margin-bottom: 20px; }

/* ── Tabs ─────────────────────────────────────────── */

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  gap: 0;
}

.tab {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  padding: 10px 8px;
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: -1px;
}
.tab:hover  { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Skeleton / Loading ───────────────────────────── */

.skeleton {
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-2) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: 2px;
}

@keyframes skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Utils ────────────────────────────────────────── */

.flex        { display: flex; }
.flex-col    { display: flex; flex-direction: column; }
.items-center{ align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.w-full { width: 100%; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── App layout ───────────────────────────────────── */

.app-body { display: flex; flex-direction: column; min-height: 100vh; }

.app-main {
  flex: 1;
  padding: 32px 28px;
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
}

.page-title {
  font-size: 16px;
  letter-spacing: 2px;
  color: var(--text);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Status cards ─────────────────────────────────── */

.status-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 48px 40px;
  max-width: 580px;
  text-align: center;
  position: relative;
}
.status-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
}
.status-card.pending::before { background: linear-gradient(90deg, transparent, var(--warn), transparent); }
.status-card.device::before  { background: linear-gradient(90deg, transparent, var(--accent), transparent); }
.status-card.rejected::before { background: linear-gradient(90deg, transparent, var(--error), transparent); }

.status-icon { font-size: 48px; margin-bottom: 20px; line-height: 1; }
.status-card h2 { font-size: 16px; letter-spacing: 2px; margin-bottom: 14px; }
.status-card p  { color: var(--text-muted); font-size: 13px; line-height: 1.8; }

.status-detail {
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 12px 16px;
  font-size: 12px;
  color: var(--text-muted);
  margin: 20px 0;
  line-height: 1.8;
  text-align: left;
}
.status-detail strong { color: var(--text); }

/* ── Info block ───────────────────────────────────── */

.info-block {
  background: var(--accent-dim);
  border: 1px solid rgba(0,180,216,.2);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.7;
}
.info-block strong { color: var(--text); }

/* ── Scrollbar ────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }