/* ============================================================
   Vollwerk Ads Dashboard — PWA stylesheet
   Mobile-first, dark theme, responsive con breakpoint a 768px.
   ============================================================ */

:root {
  --bg: #0e1117;
  --surface: #1a1f2e;
  --surface-2: #232938;
  --surface-3: #2d3548;
  --border: #2d3548;
  --text: #fafafa;
  --text-dim: #9ca3af;
  --text-faint: #6b7280;
  --accent: #ff6b35;
  --accent-dim: #c8501f;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  --topbar-h: 56px;
  --drawer-w: 280px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
*:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

html, body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

button, input, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; cursor: pointer; }

/* ============================================================
   LOGIN SCREEN
   ============================================================ */

.login-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 100;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
  box-shadow: var(--shadow);
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 6px;
}

.logo-svg { width: 36px; height: auto; fill: var(--text); }
.logo-img { width: 72px; height: 72px; border-radius: 8px; display: block; }

.login-wordmark {
  font-weight: 900;
  font-size: 24px;
  letter-spacing: -1px;
}

.login-tag {
  text-align: center;
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.login-form { display: flex; flex-direction: column; gap: 12px; }

.login-form input {
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
}
.login-form input:focus { border-color: var(--accent); }

.login-error {
  color: var(--danger);
  font-size: 13px;
  text-align: center;
  margin-top: 4px;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn-primary, .btn-ghost {
  padding: 11px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s;
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-dim); border-color: var(--accent-dim); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--surface-2); }

.btn-sm {
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 4px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--text);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.icon-btn:hover { background: var(--surface-2); }

/* ============================================================
   APP SHELL
   ============================================================ */

.app {
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-columns: 1fr;
  min-height: 100vh;
  min-height: 100dvh;
}

.topbar {
  grid-row: 1;
  grid-column: 1 / -1;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-brand {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
}
.topbar-logo { width: 32px; height: 32px; border-radius: 4px; display: block; object-fit: cover; }
.topbar-title { font-weight: 700; font-size: 15px; letter-spacing: -0.3px; }

/* ============================================================
   DRAWER
   ============================================================ */

.drawer {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  bottom: 0;
  width: var(--drawer-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  transform: translateX(-100%);
  transition: transform 0.25s ease;
  display: flex;
  flex-direction: column;
  z-index: 30;
  overflow-y: auto;
}
.drawer.open { transform: translateX(0); }

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 25;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.drawer-overlay.open { opacity: 1; pointer-events: auto; }

.drawer-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.drawer-logo { width: 56px; height: 56px; border-radius: 6px; display: block; object-fit: cover; }
.drawer-brand { display: flex; flex-direction: column; gap: 2px; }
.drawer-tag { color: var(--accent); font-size: 10px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; }

.drawer-nav, .drawer-filters { display: flex; flex-direction: column; gap: 2px; margin-bottom: 24px; }

.nav-title {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.nav-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-item:hover { background: var(--surface-2); }
.nav-item.active { background: var(--surface-2); color: var(--accent); }

.select {
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  width: 100%;
}

.drawer-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.version { color: var(--text-faint); font-size: 11px; }

/* ============================================================
   MAIN CONTENT
   ============================================================ */

.main {
  grid-row: 2;
  padding: 16px;
  overflow-x: hidden;
}

.view { display: none; }
.view.active { display: block; }

.view-header { margin-bottom: 16px; }
.view-title { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
.view-subtitle { color: var(--text-dim); font-size: 13px; margin-top: 2px; }

.section { margin-bottom: 24px; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.section-title { font-size: 15px; font-weight: 600; }
.link { color: var(--accent); font-size: 13px; }

/* ============================================================
   STATUS BANNER
   ============================================================ */

.status-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  font-size: 12px;
}
.status-item { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-faint); }
.status-dot-success { background: var(--success); }
.status-dot-warning { background: var(--warning); }
.status-dot-danger { background: var(--danger); }
.status-label { color: var(--text-dim); }
.status-value { font-weight: 500; color: var(--text); }

/* ============================================================
   KPI CARDS
   ============================================================ */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 24px;
}
.kpi-grid-3 { grid-template-columns: 1fr; }

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.kpi-label { color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
.kpi-value { font-size: 22px; font-weight: 700; line-height: 1.2; }
.kpi-trend { font-size: 11px; margin-top: 6px; color: var(--text-dim); }
.kpi-trend.up { color: var(--success); }
.kpi-trend.down { color: var(--danger); }

.skeleton { opacity: 0.45; }
.skeleton .kpi-value, .skeleton .kpi-trend { color: var(--text-faint); }

/* ============================================================
   CAMPAIGNS
   ============================================================ */

.campaigns-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.campaign-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.campaign-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 12px;
}
.campaign-name { font-weight: 600; font-size: 14px; flex: 1; }
.campaign-id { font-size: 10px; color: var(--text-faint); font-family: "SF Mono", "Consolas", monospace; }

.badge {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.badge-active { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-paused { background: rgba(245, 158, 11, 0.15); color: var(--warning); }

.campaign-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 10px;
  font-size: 12px;
}
.metric { display: flex; flex-direction: column; gap: 2px; }
.metric-label { color: var(--text-dim); font-size: 10px; text-transform: uppercase; letter-spacing: 0.3px; }
.metric-value { font-weight: 600; }

.campaign-actions {
  display: flex;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.campaign-actions button { flex: 1; }

.action-btn-pause { color: var(--warning); }
.action-btn-activate { color: var(--success); }

/* Adsets nested */
.adsets-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.adset-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  padding: 6px 0;
}
.adset-name { color: var(--text-dim); }
.adset-spend { font-weight: 500; font-feature-settings: "tnum"; }

/* ============================================================
   PIXEL GRID
   ============================================================ */

.pixel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.pixel-event {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
}
.pixel-event-name { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.3px; margin-bottom: 4px; }
.pixel-event-count { font-size: 18px; font-weight: 700; }
.pixel-event-last { font-size: 10px; color: var(--text-faint); margin-top: 2px; }

/* ============================================================
   CREATIVES
   ============================================================ */

.creatives-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.creative-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  gap: 12px;
  align-items: center;
}
.creative-thumb {
  width: 64px;
  height: 64px;
  background: var(--surface-2);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}
.creative-info { flex: 1; min-width: 0; }
.creative-name { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.creative-meta { color: var(--text-dim); font-size: 11px; }

/* ============================================================
   REPORT VIEW
   ============================================================ */

.report-content { display: flex; flex-direction: column; gap: 16px; }

.report-banner {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.report-banner-title { font-size: 11px; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.report-banner-body { font-size: 13px; color: var(--text); }

.report-camp-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 10px;
}
.report-camp-name { font-weight: 600; font-size: 15px; margin-bottom: 12px; }
.report-camp-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.report-camp-metric { padding: 6px 0; }
.report-camp-metric-label { font-size: 10px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.3px; }
.report-camp-metric-value { font-size: 18px; font-weight: 600; }
.report-camp-metric-sub { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

.report-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 8px;
  border-left-width: 3px;
}
.report-item-success { border-left-color: var(--success); }
.report-item-warning { border-left-color: var(--warning); }
.report-item-danger { border-left-color: var(--danger); }
.report-item-name { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.report-item-stats { font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
.report-item-reason { font-size: 12px; color: var(--text); }
.report-item-tag {
  display: inline-block;
  margin-top: 6px;
  padding: 2px 6px;
  font-size: 10px;
  border-radius: 4px;
  background: var(--surface-3);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.report-recs {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.report-recs li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}

.report-footer {
  margin-top: 16px;
  padding: 10px;
  font-size: 11px;
  color: var(--text-faint);
  text-align: center;
  border-top: 1px solid var(--border);
}

@media (min-width: 768px) {
  .report-camp-metrics { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================================
   MODAL + TOAST
   ============================================================ */

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
}
.modal-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  max-width: 380px;
  width: 100%;
  box-shadow: var(--shadow);
}
.modal-title { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.modal-body { color: var(--text-dim); font-size: 13px; margin-bottom: 18px; }
.modal-actions { display: flex; gap: 8px; }
.modal-actions button { flex: 1; }

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-3);
  color: var(--text);
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 60;
  font-size: 13px;
  max-width: 90%;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* ============================================================
   RESPONSIVE — Desktop (768px+)
   ============================================================ */

@media (min-width: 768px) {
  .app {
    grid-template-columns: var(--drawer-w) 1fr;
    grid-template-rows: var(--topbar-h) 1fr;
  }
  .topbar-brand { display: none; }
  #menu-toggle { display: none; }
  .drawer {
    position: sticky;
    transform: translateX(0);
    top: var(--topbar-h);
    height: calc(100vh - var(--topbar-h));
    grid-column: 1;
    grid-row: 2;
  }
  .drawer-overlay { display: none; }
  .main {
    grid-column: 2;
    grid-row: 2;
    padding: 24px 32px;
    max-width: 1400px;
  }
  .topbar { padding: 0 24px; }
  .topbar { justify-content: flex-end; }
  .kpi-grid { grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .kpi-grid-3 { grid-template-columns: repeat(3, 1fr); }
  .pixel-grid { grid-template-columns: repeat(4, 1fr); gap: 12px; }
  .creatives-grid { grid-template-columns: repeat(3, 1fr); }
  .view-title { font-size: 26px; }
  .kpi-value { font-size: 26px; }
}

/* ============================================================
   RESPONSIVE — Larger desktop (1200px+)
   ============================================================ */

@media (min-width: 1200px) {
  .main { padding: 32px 40px; }
}