:root {
  --bg-base:        #0d1117;
  --bg-surface:     #161b22;
  --bg-card:        #1c2230;
  --border:         #30363d;
  --text-primary:   #e6edf3;
  --text-muted:     #8b949e;
  --accent:         #4f8ef7;
  --accent-hover:   #6aa3ff;
}

html, body {
  height: 100%;
}

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, sans-serif;
}

/* ── Modal ── */
.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.modal-header {
  border-bottom-color: var(--border);
}

.modal-footer {
  border-top-color: var(--border);
}

.modal-title {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
}

.modal-backdrop {
  background-color: #000;
}


.sidebar {
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  width: 240px;
  min-height: 100vh;
  padding: 1.25rem 1rem;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1040;
  display: flex;
  flex-direction: column;
}

.sidebar .brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding-bottom: 1.25rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.sidebar .brand img {
  width: 120px;
  height: auto;
  object-fit: contain;
}

.sidebar .brand span {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.nav-link-custom {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: background 0.15s, color 0.15s;
}

.nav-link-custom:hover,
.nav-link-custom.active {
  background: rgba(79, 142, 247, 0.12);
  color: var(--accent);
}

.nav-link-custom i {
  flex-shrink: 0;
  opacity: 0.7;
  width: 1rem;
  text-align: center;
}

.nav-link-custom.active i,
.nav-link-custom:hover i {
  opacity: 1;
}

/* ── Bottom nav (mobile) ── */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  z-index: 1040;
  flex-direction: row;
  gap: 0.75rem;
  align-items: stretch;
  padding: 0.5rem max(0.5rem, env(safe-area-inset-left)) calc(0.5rem + env(safe-area-inset-bottom)) max(0.5rem, env(safe-area-inset-right));
}

.bottom-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.25rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.68rem;
  transition: color 0.15s;
  white-space: nowrap;
}

.bottom-nav a i {
  font-size: 1.15rem;
}

.bottom-nav a.active,
.bottom-nav a:hover {
  color: var(--accent);
}

/* ── Top bar (mobile) ── */
.topbar {
  display: none;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 1030;
  align-items: center;
  gap: 0.75rem;
}

/* ── Main ── */
.main {
  margin-left: 240px;
  padding: 1.75rem 2rem;
  min-height: 100vh;
}

.main-inner {
  max-width: 960px;
  margin: 0 auto;
}

/* ── Page header ── */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.page-header p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0.25rem 0 0;
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.card h5 {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* ── Stat cards ── */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem;
  text-align: center;
}

.stat-card .stat-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.stat-card .stat-value {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

/* ── Forms ── */
.form-control,
.form-select {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 8px;
}

.form-control:focus,
.form-select:focus {
  background: var(--bg-surface);
  border-color: var(--accent);
  color: var(--text-primary);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.18);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-control[type="file"] {
  color: var(--text-muted);
}

/* ── Tables ── */
.table {
  color: var(--text-primary);
  font-size: 0.875rem;
  --bs-table-bg: transparent;
  --bs-table-striped-bg: rgba(255,255,255,0.03);
  --bs-table-border-color: var(--border);
}

.table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-color: var(--border);
}

.table td {
  border-color: var(--border);
  vertical-align: middle;
}

.table-responsive {
  border-radius: 8px;
}



/* ── Buttons ── */
.btn {
  border-radius: 8px;
}

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

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

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

.btn-secondary:hover, .btn-secondary:focus {
  background: rgba(255,255,255,0.05);
  border-color: var(--border);
  color: var(--text-primary);
}

.btn-danger {
  background: rgba(220, 53, 69, 0.12);
  border-color: transparent;
  color: #f87171;
}

.btn-danger:hover, .btn-danger:focus {
  background: rgba(220, 53, 69, 0.22);
  border-color: transparent;
  color: #f87171;
}

.btn-accent {
  background: rgba(79, 142, 247, 0.12);
  border-color: transparent;
  color: var(--accent);
}

.btn-accent:hover, .btn-accent:focus {
  background: rgba(79, 142, 247, 0.22);
  border-color: transparent;
  color: var(--accent-hover);
}

.btn-success {
  border-radius: 8px;
}

/* ── Hamburger toggle ── */
.hamburger {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  line-height: 1;
  font-size: 1rem;
  display: flex;
  align-items: center;
}

/* ── Offcanvas dark sidebar (mobile) ── */
.offcanvas {
  background: var(--bg-surface) !important;
  border-right: 1px solid var(--border) !important;
}

.offcanvas-header {
  border-bottom: 1px solid var(--border);
}

/* ── Badge ── */
.badge-failed {
  background: rgba(220,53,69,0.18);
  color: #f87171;
  border-radius: 6px;
  font-size: 0.8rem;
  padding: 0.2em 0.55em;
}

.badge-delivered {
  background: rgba(34,197,94,0.15);
  color: #4ade80;
  border-radius: 6px;
  font-size: 0.8rem;
  padding: 0.2em 0.55em;
}

/* ── Dropzone ── */
.dropzone {
  background: var(--bg-surface);
  border: 2px dashed var(--border);
  border-radius: 10px;
  color: var(--text-muted);
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 1rem;
  cursor: pointer;
}

.dropzone:hover,
.dropzone.dz-drag-hover {
  border-color: var(--accent);
  background: rgba(79, 142, 247, 0.06);
}

.dropzone .dz-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  pointer-events: none;
}

.dropzone .dz-message .dz-icon {
  font-size: 1.75rem;
  color: var(--text-muted);
}

.dropzone .dz-message span {
  font-size: 0.875rem;
}

.dropzone .dz-preview .dz-filename span,
.dropzone .dz-preview .dz-size {
  color: var(--text-primary);
}

.dropzone .dz-preview .dz-progress .dz-upload {
  background: var(--accent);
}

/* ── Section header ── */
.section-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

/* ── Chat bubble tail override when sitting on --bg-surface ── */
.bubble-on-surface .from-them:after {
  background: var(--bg-surface);
}

/* ── Responsive ── */
@media (max-width: 767.98px) {
  .sidebar     { display: none; }
  .bottom-nav  { display: flex; }
  .topbar      { display: flex; padding-left: max(1rem, env(safe-area-inset-left)); padding-right: max(1rem, env(safe-area-inset-right)); }
  .main        {
    margin-left: 0;
    padding-top:    1rem;
    padding-left:   max(1rem, env(safe-area-inset-left));
    padding-right:  max(1rem, env(safe-area-inset-right));
    padding-bottom: calc(4rem + max(0.5rem, env(safe-area-inset-bottom)));
  }
}