/* ============================================================
   PLC Connect — Light theme (slate gray + semantic accents)
   ============================================================ */

:root {
  /* Strukturalne boje */
  --bg:           #f8fafc;
  --bg-card:      #ffffff;
  --border:      #e2e8f0;
  --border-strong: #cbd5e1;
  --text:        #0f172a;
  --text-soft:   #475569;
  --muted:       #94a3b8;

  /* Accent + statusi */
  --accent:      #0f172a;
  --accent-hover: #1e293b;
  --green:       #10b981;
  --green-bg:    #ecfdf5;
  --yellow:      #f59e0b;
  --yellow-bg:   #fffbeb;
  --red:         #ef4444;
  --red-bg:      #fef2f2;
  --blue-link:   #475569;
  --blue-link-hover: #0f172a;

  /* Sjenke */
  --shadow-sm:   0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow:      0 1px 3px 0 rgba(15, 23, 42, 0.06), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
  --shadow-md:   0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg:   0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

code, pre, .mono {
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.85em;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--text);
}

/* ============================================================
   HEADER
   ============================================================ */
header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 14px 32px;
  display: flex;
  align-items: center;
  gap: 28px;
  box-shadow: var(--shadow-sm);
}

.logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.logo::before {
  /* Heksagon kao filled glyph */
  content: "⬢";
  color: var(--accent);
  font-size: 1.2em;
}

.nav-tabs {
  display: flex;
  gap: 4px;
  flex: 1;
}
.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-soft);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}
.tab-btn:hover {
  background: var(--bg);
  color: var(--text);
}
.tab-btn.active {
  background: var(--text);
  color: var(--bg-card);
}

.header-meta {
  color: var(--text-soft);
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================================
   CONTAINER + LAYOUT
   ============================================================ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
  color: var(--text);
}

.sub {
  color: var(--muted);
  font-size: 0.8125rem;
  margin-bottom: 24px;
}

.section-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 20px 0 12px;
}

/* ============================================================
   PANEL / CARDS
   ============================================================ */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}
.card-label {
  color: var(--muted);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 6px;
}
.card-value {
  color: var(--text);
  font-size: 1.125rem;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}

/* ============================================================
   FORMS
   ============================================================ */
.field {
  margin-bottom: 16px;
}
.field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}
input[type="text"],
input[type="password"],
input[type="email"],
select,
textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.08);
}
input::placeholder, textarea::placeholder {
  color: var(--muted);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}
.btn:hover {
  background: var(--bg);
  border-color: var(--text-soft);
}

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

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-soft);
}
.btn-ghost:hover {
  background: var(--bg);
  color: var(--text);
}

.btn-danger {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--red);
}
.btn-danger:hover {
  background: var(--red-bg);
  border-color: var(--red);
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.75rem;
}

/* ============================================================
   TABLES
   ============================================================ */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.data-table thead th {
  text-align: left;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: var(--muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: transparent;
}
.data-table tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}
.data-table tbody tr:last-child td {
  border-bottom: none;
}
.data-table tbody tr:hover {
  background: var(--bg);
}

.site-name {
  font-weight: 600;
  color: var(--text);
}

.empty-row td {
  color: var(--muted);
  text-align: center;
  font-style: italic;
  padding: 24px 12px !important;
}

/* ============================================================
   BADGES + PILLS
   ============================================================ */
.badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid rgba(16, 185, 129, 0.2);
}
.badge.offline {
  background: var(--red-bg);
  color: var(--red);
  border-color: rgba(239, 68, 68, 0.2);
}

.pill {
  font-size: 0.6875rem;
  padding: 2px 9px;
  border-radius: 12px;
  font-weight: 500;
  border: 1px solid var(--border);
  color: var(--text-soft);
  background: var(--bg);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.pill.admin {
  color: var(--yellow);
  border-color: rgba(245, 158, 11, 0.25);
  background: var(--yellow-bg);
}
.pill.user {
  color: var(--text-soft);
  border-color: var(--border);
  background: var(--bg);
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.4);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
}
.modal-overlay.open {
  display: flex;
}
.modal {
  background: var(--bg-card);
  border-radius: 10px;
  padding: 24px;
  width: 440px;
  max-width: 92vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}
.modal h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 18px;
  color: var(--text);
}
.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 22px;
  justify-content: flex-end;
}

.err-msg {
  color: var(--red);
  font-size: 0.8125rem;
  min-height: 18px;
  margin-top: 4px;
}

/* ============================================================
   LOGIN / AUTH PAGES
   ============================================================ */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--bg);
}
.login-card {
  width: 380px;
  max-width: 92vw;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.login-card .logo {
  display: flex;
  justify-content: center;
  margin-bottom: 6px;
  font-size: 1.25rem;
}
.login-sub {
  text-align: center;
  color: var(--muted);
  font-size: 0.8125rem;
  margin-bottom: 28px;
}

/* ============================================================
   FLASH MESSAGES
   ============================================================ */
.flash {
  background: var(--red-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--red);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.8125rem;
  margin-bottom: 16px;
}

/* ============================================================
   UTILITY
   ============================================================ */
.muted-inline {
  color: var(--muted);
  font-size: 0.8125rem;
}
a.linklike {
  color: var(--blue-link);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
}
a.linklike:hover {
  color: var(--blue-link-hover);
  text-decoration: underline;
}

.tenant-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 28px 0 10px;
  padding: 0 4px;
}
.tenant-head h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

.qr-img {
  display: block;
  margin: 0 auto;
  background: #fff;
  padding: 12px;
  border-radius: 10px;
  width: 220px;
  height: 220px;
  border: 1px solid var(--border);
}

/* View visibility */
.view { display: none; }
.view.active { display: block; }

/* ============================================================
   ITER9: Peer-type toggle (Gateway / Client)
   ============================================================ */
.type-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.type-option {
  cursor: pointer;
  display: block;
}
.type-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.type-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  transition: border-color 0.15s, background 0.15s;
}
.type-option:hover .type-card {
  border-color: var(--text-soft);
}
.type-option input[type="radio"]:checked + .type-card {
  border-color: var(--accent);
  background: var(--bg);
}
.type-card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}
.type-card-sub {
  font-size: 0.75rem;
  color: var(--text-soft);
  line-height: 1.4;
}

/* Peer-type badge in tables */
.peer-type-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid var(--border);
}
.peer-type-badge.gateway {
  background: var(--bg);
  color: var(--text-soft);
}
.peer-type-badge.client {
  background: var(--green-bg);
  color: var(--green);
  border-color: rgba(16, 185, 129, 0.25);
}

/* ============================================================
   ITER12: Sortable table headers
   Click header → sorts ascending → click again → descending → click again → off
   ============================================================ */
.data-table thead th.sortable {
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, color 0.15s;
}
.data-table thead th.sortable:hover {
  color: var(--text);
}
.data-table thead th.sortable::after {
  content: " ↕";
  opacity: 0.3;
  font-size: 0.7em;
  transition: opacity 0.15s;
}
.data-table thead th.sortable:hover::after {
  opacity: 0.6;
}
.data-table thead th.sort-asc::after {
  content: " ↑";
  opacity: 1;
  color: var(--text);
}
.data-table thead th.sort-desc::after {
  content: " ↓";
  opacity: 1;
  color: var(--text);
}