/*
 * Crystal Theme — Battery Inventory System
 * =====================================================================
 * Palette: white, light grey, dark green (#1a5c38), light green (#4caf50),
 *          with subtle frosted-glass ("crystal") surfaces.
 * Typography: Inter (system-ui fallback) for data tables; slight uppercase
 *             tracking for labels, giving the dashboard a clean ops-room feel.
 * Signature element: the scan pulse ring on the barcode scanner button.
 * =====================================================================
 */

/* ── Custom properties ───────────────────────────────────────────────── */
:root {
  --c-dark-green:   #1a5c38;
  --c-mid-green:    #2e7d52;
  --c-light-green:  #4caf50;
  --c-pale-green:   #e8f5e9;
  --c-white:        #ffffff;
  --c-grey-50:      #f9fafb;
  --c-grey-100:     #f3f4f6;
  --c-grey-200:     #e5e7eb;
  --c-grey-400:     #9ca3af;
  --c-grey-600:     #4b5563;
  --c-grey-900:     #111827;

  --c-danger:       #dc2626;
  --c-warning:      #d97706;
  --c-info:         #0369a1;

  /* Crystal surface */
  --crystal-bg:     rgba(255,255,255,0.72);
  --crystal-border: rgba(255,255,255,0.45);
  --crystal-shadow: 0 4px 24px rgba(26,92,56,0.10), 0 1px 4px rgba(0,0,0,0.06);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --nav-width: 240px;
}

/* ── Reset / base ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { font-size: 15px; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, #e8f5e9 0%, #f0f4f0 50%, #e3eeea 100%);
  min-height: 100vh;
  color: var(--c-grey-900);
  line-height: 1.55;
}

/* ── Login page ─────────────────────────────────────────────────────── */
.login-body {
  background: linear-gradient(160deg, var(--c-dark-green) 0%, var(--c-mid-green) 55%, #1b3a28 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem;
}

.login-card {
  background: var(--crystal-bg);
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  border: 1px solid var(--crystal-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--crystal-shadow), 0 0 0 1px rgba(255,255,255,0.12) inset;
  padding: 2.5rem 2.75rem;
  width: 100%;
  max-width: 420px;
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.login-logo-icon {
  width: 44px;
  height: 44px;
  background: var(--c-dark-green);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-light-green);
  font-size: 1.4rem;
}

.login-logo-text {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-dark-green);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.login-logo-text small {
  display: block;
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--c-grey-600);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.login-card .form-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-grey-600);
}

.login-card .form-control {
  border: 1.5px solid var(--c-grey-200);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  font-size: 0.95rem;
  background: rgba(255,255,255,0.9);
  transition: border-color 0.18s, box-shadow 0.18s;
}

.login-card .form-control:focus {
  border-color: var(--c-mid-green);
  box-shadow: 0 0 0 3px rgba(46,125,82,0.18);
  outline: none;
}

.btn-login {
  background: var(--c-dark-green);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.65rem 1.5rem;
  width: 100%;
  transition: background 0.18s, transform 0.1s;
}

.btn-login:hover  { background: var(--c-mid-green); color: #fff; }
.btn-login:active { transform: scale(0.98); }

/* ── Layout shell ────────────────────────────────────────────────────── */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar navigation ──────────────────────────────────────────────── */
.sidebar {
  width: var(--nav-width);
  background: var(--c-dark-green);
  color: rgba(255,255,255,0.85);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 200;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
  transition: transform 0.25s ease;
}

.sidebar-brand {
  padding: 1.25rem 1rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.sidebar-brand-icon {
  width: 34px;
  height: 34px;
  background: var(--c-light-green);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-dark-green);
  font-size: 1rem;
  flex-shrink: 0;
}

.sidebar-brand-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.sidebar-brand-name small {
  display: block;
  font-weight: 400;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
}

.sidebar-company {
  padding: 0.55rem 1rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #fff;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  margin: 0 0.75rem 0.25rem;
  white-space: normal;
  overflow: visible;
  word-break: break-word;
  line-height: 1.3;
}

.sidebar-section-label {
  padding: 1rem 1rem 0.3rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}

.sidebar-nav { list-style: none; padding: 0; margin: 0; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 1rem;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 0.875rem;
  border-radius: 0;
  transition: background 0.15s, color 0.15s;
  position: relative;
}

.sidebar-nav a:hover {
  background: rgba(255,255,255,0.09);
  color: #fff;
}

.sidebar-nav a.active {
  background: rgba(76,175,80,0.18);
  color: var(--c-light-green);
  font-weight: 600;
}

.sidebar-nav a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-light-green);
  border-radius: 0 2px 2px 0;
}

.sidebar-nav .nav-icon {
  width: 18px;
  text-align: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.sidebar-nav .badge {
  margin-left: auto;
  font-size: 0.67rem;
}

/* ── Main content area ───────────────────────────────────────────────── */
.main-content {
  flex: 1;
  margin-left: var(--nav-width);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  background: var(--crystal-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-grey-200);
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.topbar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-dark-green);
  flex: 1;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--c-grey-600);
}

.topbar-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--c-dark-green);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--c-dark-green);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
}

.page-content {
  padding: 1.5rem;
  flex: 1;
}

/* ── Crystal cards ───────────────────────────────────────────────────── */
.crystal-card {
  background: var(--crystal-bg);
  backdrop-filter: blur(10px) saturate(1.4);
  -webkit-backdrop-filter: blur(10px) saturate(1.4);
  border: 1px solid var(--crystal-border);
  border-radius: var(--radius-md);
  box-shadow: var(--crystal-shadow);
}

.crystal-card .card-header {
  background: rgba(255,255,255,0.55);
  border-bottom: 1px solid var(--c-grey-200);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--c-dark-green);
}

.crystal-card .card-body {
  padding: 1.25rem;
}

/* ── Stat cards (dashboard) ──────────────────────────────────────────── */
.stat-card {
  background: var(--crystal-bg);
  backdrop-filter: blur(10px) saturate(1.4);
  -webkit-backdrop-filter: blur(10px) saturate(1.4);
  border: 1px solid var(--crystal-border);
  border-radius: var(--radius-md);
  box-shadow: var(--crystal-shadow);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform 0.15s, box-shadow 0.15s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(26,92,56,0.14), 0 2px 8px rgba(0,0,0,0.08);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.stat-icon.green  { background: var(--c-pale-green); color: var(--c-dark-green); }
.stat-icon.grey   { background: var(--c-grey-100);   color: var(--c-grey-600);   }
.stat-icon.amber  { background: #fff8e1;              color: var(--c-warning);    }
.stat-icon.red    { background: #fee2e2;              color: var(--c-danger);     }
.stat-icon.blue   { background: #e0f2fe;              color: var(--c-info);       }

.stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--c-dark-green);
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-grey-400);
  margin-top: 0.2rem;
}

/* ── Tables ──────────────────────────────────────────────────────────── */
.table-crystal {
  background: transparent;
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
}

.table-crystal thead th {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-grey-600);
  background: rgba(255,255,255,0.6);
  border-bottom: 2px solid var(--c-grey-200);
  padding: 0.7rem 1rem;
  white-space: nowrap;
}

.table-crystal tbody td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--c-grey-100);
  font-size: 0.875rem;
  vertical-align: middle;
  background: rgba(255,255,255,0.45);
  transition: background 0.12s;
}

.table-crystal tbody tr:hover td {
  background: var(--c-pale-green);
}

.table-crystal tbody tr:last-child td { border-bottom: none; }

/* ── Status badges ───────────────────────────────────────────────────── */
.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-status.warehouse   { background: var(--c-pale-green); color: var(--c-dark-green); }
.badge-status.assigned    { background: #fff3e0; color: #e65100; }
.badge-status.sold        { background: #e3f2fd; color: #1565c0; }
.badge-status.returned    { background: #f3e5f5; color: #6a1b9a; }
.badge-status.discrepancy { background: #fee2e2; color: var(--c-danger); }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn-primary {
  background: var(--c-dark-green);
  border-color: var(--c-dark-green);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: background 0.15s, border-color 0.15s;
}
.btn-primary:hover,
.btn-primary:focus { background: var(--c-mid-green); border-color: var(--c-mid-green); color: #fff; }

.btn-success {
  background: var(--c-light-green);
  border-color: var(--c-light-green);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.btn-success:hover { background: #43a047; border-color: #43a047; color: #fff; }

.btn-outline-primary {
  color: var(--c-dark-green);
  border-color: var(--c-dark-green);
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.btn-outline-primary:hover { background: var(--c-dark-green); color: #fff; }

.btn-sm { font-size: 0.8rem; padding: 0.3rem 0.7rem; }

/* ── Scan zone ───────────────────────────────────────────────────────── */
.scan-zone {
  background: var(--crystal-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 2px dashed var(--c-grey-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
}

.scan-zone.scanning  { border-color: var(--c-light-green); background: rgba(76,175,80,0.06); }
.scan-zone.success   { border-color: var(--c-light-green); background: rgba(76,175,80,0.1); }
.scan-zone.duplicate { border-color: var(--c-warning);     background: rgba(217,119,6,0.08); }
.scan-zone.error     { border-color: var(--c-danger);      background: rgba(220,38,38,0.07); }

/* Signature: scan pulse ring */
.scan-btn-pulse {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--c-dark-green);
  color: var(--c-light-green);
  font-size: 1.7rem;
  cursor: pointer;
  border: none;
  outline: none;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(26,92,56,0.3);
  transition: transform 0.15s;
}

.scan-btn-pulse:hover { transform: scale(1.06); }

.scan-btn-pulse::before,
.scan-btn-pulse::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--c-light-green);
  animation: scanPulse 2s ease-out infinite;
  opacity: 0;
}

.scan-btn-pulse::after { animation-delay: 0.9s; }

@keyframes scanPulse {
  0%   { width: 68px; height: 68px; opacity: 0.7; }
  100% { width: 120px; height: 120px; opacity: 0; }
}

.scan-zone.scanning .scan-btn-pulse::before,
.scan-zone.scanning .scan-btn-pulse::after {
  animation-play-state: running;
}

/* Camera preview */
#camera-preview {
  width: 100%;
  max-width: 380px;
  border-radius: var(--radius-sm);
  margin: 0 auto;
  display: none;
  border: 2px solid var(--c-light-green);
}

/* ── Barcode result feedback ─────────────────────────────────────────── */
.scan-result-toast {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  margin-top: 1rem;
  animation: fadeInUp 0.2s ease;
}

@keyframes fadeInUp {
  from { transform: translateY(6px); opacity: 0; }
  to   { transform: translateY(0);   opacity: 1; }
}

.scan-result-toast.show { display: flex; }
.scan-result-toast.matched   { background: var(--c-pale-green); color: var(--c-dark-green); }
.scan-result-toast.not-found { background: #fee2e2;              color: var(--c-danger);    }
.scan-result-toast.duplicate { background: #fff3e0;              color: var(--c-warning);   }

/* ── Forms ───────────────────────────────────────────────────────────── */
.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-grey-600);
  margin-bottom: 0.3rem;
}

.form-control, .form-select {
  border: 1.5px solid var(--c-grey-200);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus, .form-select:focus {
  border-color: var(--c-mid-green);
  box-shadow: 0 0 0 3px rgba(46,125,82,0.15);
  outline: none;
  background: #fff;
}

.form-control.is-invalid { border-color: var(--c-danger); }
.form-control.is-valid   { border-color: var(--c-light-green); }

/* ── Discrepancy notification banner ────────────────────────────────── */
.disc-banner {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.8rem 1.2rem;
  background: #fee2e2;
  border: 1px solid #fca5a5;
  border-radius: var(--radius-sm);
  color: var(--c-danger);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
  animation: fadeInUp 0.25s ease;
}

/* ── Print barcode styles ────────────────────────────────────────────── */
@media print {
  .sidebar, .topbar, .no-print { display: none !important; }
  .main-content { margin-left: 0; }
  .barcode-label {
    width: 2.5in;
    height: 1.25in;
    border: 1px solid #ccc;
    padding: 4px 8px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    page-break-inside: avoid;
    margin: 4px;
  }
  .barcode-label svg { max-width: 100%; height: 55px; }
  .barcode-label .barcode-text { font-size: 9px; font-family: monospace; }
  .barcode-label .part-number  { font-size: 10px; font-weight: 700; }
}

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: 4px 0 24px rgba(0,0,0,0.18);
  }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .sidebar-toggle { display: block; }
  .page-content { padding: 1rem; }
  .stat-card { padding: 1rem; }
  .stat-value { font-size: 1.5rem; }
  .table-responsive { font-size: 0.82rem; }
  .topbar { padding: 0.55rem 1rem; }
}

@media (max-width: 480px) {
  .login-card { padding: 1.75rem 1.5rem; }
  .scan-zone { padding: 1.25rem; }
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 190;
}
.sidebar-overlay.show { display: block; }