:root {
  color-scheme: light;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #f9fafb;
  --border: #e3e5e9;
  --text: #1a1d23;
  --text-muted: #6b7280;
  --primary: #16a34a;
  --primary-dark: #15803d;
  --primary-contrast: #ffffff;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --info: #2563eb;
  --info-bg: #eff6ff;
  --success-bg: #f0fdf4;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.06);
  --sidebar-w: 232px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 { margin: 0 0 0.5rem; font-weight: 600; }
h1 { font-size: 1.4rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 0.75rem; }

.text-muted { color: var(--text-muted); }
.small { font-size: 0.8rem; }

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

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1rem 0.75rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  padding: 0.4rem 0.5rem 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); }

.nav-group { margin-bottom: 1.1rem; }
.nav-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 0 0.5rem;
  margin-bottom: 0.35rem;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
  margin-bottom: 2px;
}
.nav-link:hover { background: var(--surface-2); }
.nav-link.active { background: var(--success-bg); color: var(--primary-dark); }
.nav-link .icon { width: 18px; text-align: center; opacity: 0.85; }

.sidebar-footer { margin-top: auto; padding-top: 0.75rem; border-top: 1px solid var(--border); }

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}

.content { padding: 1.25rem; flex: 1; }
.content.no-pad { padding: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  line-height: 1.2;
}
.btn:hover { background: var(--surface-2); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-contrast); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.78rem; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { background: var(--surface-2); }
.btn-block { width: 100%; justify-content: center; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ---------- Forms ---------- */
.field { margin-bottom: 1rem; }
label { display: block; font-weight: 600; font-size: 0.82rem; margin-bottom: 0.3rem; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=search], input[type=date], input[type=datetime-local], input[type=tel],
select, textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(22, 163, 74, 0.25);
  border-color: var(--primary);
}
.help-text { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; }
.error-text { font-size: 0.75rem; color: var(--danger); margin-top: 0.25rem; }
.checkbox-row { display: flex; align-items: center; gap: 0.5rem; }
.checkbox-row input { width: auto; }

/* ---------- Cards / tables ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-header {
  padding: 0.9rem 1.1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-body { padding: 1.1rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.65rem 1rem; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
th { color: var(--text-muted); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--surface-2);
  color: var(--text-muted);
  white-space: nowrap;
}
.badge-success { background: var(--success-bg); color: var(--primary-dark); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }

.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }

/* ---------- Alerts / flashes ---------- */
.alert { padding: 0.7rem 1rem; border-radius: var(--radius-sm); margin-bottom: 1rem; font-size: 0.85rem; border: 1px solid transparent; }
.alert-success { background: var(--success-bg); color: var(--primary-dark); border-color: #bbf7d0; }
.alert-error { background: var(--danger-bg); color: var(--danger); border-color: #fecaca; }
.alert-info { background: var(--info-bg); color: var(--info); border-color: #bfdbfe; }

/* ---------- Auth pages ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: var(--bg);
}
.auth-card { width: 100%; max-width: 380px; }
.auth-card .brand { justify-content: center; padding-bottom: 1.5rem; }

/* ---------- Inbox layout ---------- */
.inbox {
  display: grid;
  grid-template-columns: 300px 1fr 280px;
  height: calc(100vh - 57px);
}
.inbox-list { border-right: 1px solid var(--border); overflow-y: auto; background: var(--surface); }
.inbox-thread { display: flex; flex-direction: column; min-width: 0; background: var(--surface-2); }
.inbox-details { border-left: 1px solid var(--border); overflow-y: auto; background: var(--surface); padding: 1rem; }

.conv-item { display: block; padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); cursor: pointer; }
.conv-item:hover { background: var(--surface-2); }
.conv-item.active { background: var(--success-bg); }
.conv-item .name { font-weight: 600; }
.conv-item .preview { color: var(--text-muted); font-size: 0.8rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-item .meta { display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; }

.thread-header { padding: 0.75rem 1.1rem; border-bottom: 1px solid var(--border); background: var(--surface); display: flex; justify-content: space-between; align-items: center; }
.thread-messages { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: 0.5rem; }
.thread-composer { padding: 0.75rem; border-top: 1px solid var(--border); background: var(--surface); display: flex; gap: 0.5rem; }
.thread-composer textarea { flex: 1; resize: none; }

.bubble { max-width: 65%; padding: 0.5rem 0.75rem; border-radius: 12px; font-size: 0.86rem; }
.bubble-in { align-self: flex-start; background: var(--surface); border: 1px solid var(--border); border-bottom-left-radius: 2px; }
.bubble-out { align-self: flex-end; background: var(--success-bg); border-bottom-right-radius: 2px; }
.bubble .meta { font-size: 0.68rem; color: var(--text-muted); margin-top: 0.25rem; text-align: right; }

/* ---------- Automations canvas ---------- */
.flow-toolbar { padding: 0.75rem 1.1rem; border-bottom: 1px solid var(--border); background: var(--surface); display: flex; justify-content: space-between; align-items: center; }
.flow-canvas-wrap { position: relative; overflow: auto; height: calc(100vh - 115px); background: var(--bg) radial-gradient(var(--border) 1px, transparent 1px); background-size: 18px 18px; }
.flow-canvas { position: relative; width: 2400px; height: 1600px; }
.flow-connections { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; }
.flow-connections path { stroke: #9ca3af; stroke-width: 2; fill: none; }
.flow-node {
  position: absolute;
  width: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: grab;
  user-select: none;
}
.flow-node:active { cursor: grabbing; }
.flow-node.dragging { z-index: 20; box-shadow: 0 8px 24px rgba(16,24,40,0.18); }
.flow-node-head { display: flex; align-items: center; gap: 0.4rem; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 0.8rem; }
.flow-node-body { padding: 0.6rem 0.7rem; font-size: 0.78rem; color: var(--text-muted); }
.flow-node-actions { display: flex; gap: 0.3rem; padding: 0.4rem 0.7rem 0.55rem; }
.flow-node.trigger .flow-node-head { color: var(--primary-dark); }
.flow-node.condition .flow-node-head { color: var(--warning); }
.flow-add-btn {
  position: absolute;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  box-shadow: var(--shadow);
}

/* ---------- Modal (used by HTMX dialogs) ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(17, 20, 24, 0.45);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 4vh 1rem; z-index: 50; overflow-y: auto;
}
.modal { background: var(--surface); border-radius: var(--radius); width: 100%; max-width: 480px; box-shadow: 0 20px 50px rgba(0,0,0,0.25); }
.modal-header { padding: 1rem 1.1rem; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-body { padding: 1.1rem; }
.modal-footer { padding: 0.9rem 1.1rem; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 0.5rem; }

.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.8rem; flex-shrink: 0;
}

.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: 0.5rem; }
.gap-md { gap: 1rem; }
.mt-md { margin-top: 1rem; }
.mb-0 { margin-bottom: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ---------- Global loading bar ---------- */
#global-loading-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--primary);
  z-index: 100;
  opacity: 0;
  transition: width 0.2s ease, opacity 0.2s ease;
}
#global-loading-bar.is-loading { width: 70%; opacity: 1; transition: width 8s cubic-bezier(0.1, 0.5, 0.1, 1), opacity 0.15s ease; }
#global-loading-bar.is-done { width: 100%; opacity: 1; transition: width 0.2s ease, opacity 0.25s ease 0.15s; }

/* ---------- Mobile menu toggle ---------- */
.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
}

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(17, 20, 24, 0.45);
  z-index: 39;
}

@media (max-width: 900px) {
  .menu-toggle { display: inline-flex; }

  .sidebar {
    display: flex;
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 40;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: var(--shadow);
  }
  body.menu-open .sidebar { transform: translateX(0); }
  body.menu-open .sidebar-backdrop { display: block; }
  body.menu-open { overflow: hidden; }

  .inbox { grid-template-columns: 1fr; }
  .inbox-list, .inbox-details { display: none; }
  .grid-2 { grid-template-columns: 1fr; }
}