diff --git a/src/app/(dashboard)/[portSlug]/admin/ports/page.tsx b/src/app/(dashboard)/[portSlug]/admin/ports/page.tsx
index e827340..e0acb7e 100644
--- a/src/app/(dashboard)/[portSlug]/admin/ports/page.tsx
+++ b/src/app/(dashboard)/[portSlug]/admin/ports/page.tsx
@@ -1,16 +1,5 @@
+import { PortList } from '@/components/admin/ports/port-list';
+
 export default function PortManagementPage() {
-  return (
-    <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">Port Management</h1>
-        <p className="text-muted-foreground">Manage port locations and configurations</p>
-      </div>
-      <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
-        <p className="text-lg font-medium text-muted-foreground">Coming in Layer 2</p>
-        <p className="text-sm text-muted-foreground">
-          This feature will be implemented in the next phase.
-        </p>
-      </div>
-    </div>
-  );
+  return <PortList />;
 }
diff --git a/src/app/(dashboard)/[portSlug]/admin/settings/page.tsx b/src/app/(dashboard)/[portSlug]/admin/settings/page.tsx
index 52503c1..10bddcb 100644
--- a/src/app/(dashboard)/[portSlug]/admin/settings/page.tsx
+++ b/src/app/(dashboard)/[portSlug]/admin/settings/page.tsx
@@ -1,16 +1,5 @@
+import { SettingsManager } from '@/components/admin/settings/settings-manager';
+
 export default function SystemSettingsPage() {
-  return (
-    <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-bold text-foreground">System Settings</h1>
-        <p className="text-muted-foreground">Configure system-wide settings</p>
-      </div>
-      <div className="flex flex-col items-center justify-center rounded-lg border border-dashed p-12">
-        <p className="text-lg font-medium text-muted-foreground">Coming in Layer 2</p>
-        <p className="text-sm text-muted-foreground">
-          This feature will be implemented in the next phase.
-        </p>
-      </div>
-    </div>
-  );
+  return <SettingsManager />;
 }
diff --git a/src/app/api/v1/admin/ports/[id]/route.ts b/src/app/api/v1/admin/ports/[id]/route.ts
new file mode 100644
index 0000000..db221de
--- /dev/null
+++ b/src/app/api/v1/admin/ports/[id]/route.ts
@@ -0,0 +1,35 @@
+import { NextResponse } from 'next/server';
+
+import { withAuth, withPermission } from '@/lib/api/helpers';
+import { parseBody } from '@/lib/api/route-helpers';
+import { getPort, updatePort } from '@/lib/services/ports.service';
+import { updatePortSchema } from '@/lib/validators/ports';
+import { errorResponse } from '@/lib/errors';
+
+export const GET = withAuth(
+  withPermission('admin', 'manage_settings', async (_req, _ctx, params) => {
+    try {
+      const data = await getPort(params.id!);
+      return NextResponse.json({ data });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
+
+export const PATCH = withAuth(
+  withPermission('admin', 'manage_settings', async (req, ctx, params) => {
+    try {
+      const body = await parseBody(req, updatePortSchema);
+      const data = await updatePort(params.id!, body, {
+        userId: ctx.userId,
+        portId: ctx.portId,
+        ipAddress: ctx.ipAddress,
+        userAgent: ctx.userAgent,
+      });
+      return NextResponse.json({ data });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
diff --git a/src/app/api/v1/admin/ports/route.ts b/src/app/api/v1/admin/ports/route.ts
new file mode 100644
index 0000000..881f5f9
--- /dev/null
+++ b/src/app/api/v1/admin/ports/route.ts
@@ -0,0 +1,35 @@
+import { NextResponse } from 'next/server';
+
+import { withAuth, withPermission } from '@/lib/api/helpers';
+import { parseBody } from '@/lib/api/route-helpers';
+import { listPorts, createPort } from '@/lib/services/ports.service';
+import { createPortSchema } from '@/lib/validators/ports';
+import { errorResponse } from '@/lib/errors';
+
+export const GET = withAuth(
+  withPermission('admin', 'manage_settings', async () => {
+    try {
+      const data = await listPorts();
+      return NextResponse.json({ data });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
+
+export const POST = withAuth(
+  withPermission('admin', 'manage_settings', async (req, ctx) => {
+    try {
+      const body = await parseBody(req, createPortSchema);
+      const data = await createPort(body, {
+        userId: ctx.userId,
+        portId: ctx.portId,
+        ipAddress: ctx.ipAddress,
+        userAgent: ctx.userAgent,
+      });
+      return NextResponse.json({ data }, { status: 201 });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
diff --git a/src/app/api/v1/admin/settings/route.ts b/src/app/api/v1/admin/settings/route.ts
new file mode 100644
index 0000000..4e5d9ad
--- /dev/null
+++ b/src/app/api/v1/admin/settings/route.ts
@@ -0,0 +1,52 @@
+import { NextResponse } from 'next/server';
+
+import { withAuth, withPermission } from '@/lib/api/helpers';
+import { parseBody } from '@/lib/api/route-helpers';
+import { listSettings, upsertSetting, deleteSetting } from '@/lib/services/settings.service';
+import { upsertSettingSchema, deleteSettingSchema } from '@/lib/validators/settings';
+import { errorResponse } from '@/lib/errors';
+
+export const GET = withAuth(
+  withPermission('admin', 'manage_settings', async (_req, ctx) => {
+    try {
+      const data = await listSettings(ctx.portId);
+      return NextResponse.json({ data });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
+
+export const PUT = withAuth(
+  withPermission('admin', 'manage_settings', async (req, ctx) => {
+    try {
+      const { key, value } = await parseBody(req, upsertSettingSchema);
+      const data = await upsertSetting(key, value, ctx.portId, {
+        userId: ctx.userId,
+        portId: ctx.portId,
+        ipAddress: ctx.ipAddress,
+        userAgent: ctx.userAgent,
+      });
+      return NextResponse.json({ data });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
+
+export const DELETE = withAuth(
+  withPermission('admin', 'manage_settings', async (req, ctx) => {
+    try {
+      const { key } = await parseBody(req, deleteSettingSchema);
+      await deleteSetting(key, ctx.portId, {
+        userId: ctx.userId,
+        portId: ctx.portId,
+        ipAddress: ctx.ipAddress,
+        userAgent: ctx.userAgent,
+      });
+      return NextResponse.json({ success: true });
+    } catch (error) {
+      return errorResponse(error);
+    }
+  }),
+);
diff --git a/src/components/admin/ports/port-form.tsx b/src/components/admin/ports/port-form.tsx
new file mode 100644
index 0000000..31c8192
--- /dev/null
+++ b/src/components/admin/ports/port-form.tsx
@@ -0,0 +1,209 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { Switch } from '@/components/ui/switch';
+import { Sheet, SheetContent, SheetHeader, SheetTitle, SheetFooter } from '@/components/ui/sheet';
+import { apiFetch } from '@/lib/api/client';
+
+interface PortFormProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  port?: {
+    id: string;
+    name: string;
+    slug: string;
+    logoUrl: string | null;
+    primaryColor: string | null;
+    defaultCurrency: string;
+    timezone: string;
+    isActive: boolean;
+  } | null;
+  onSuccess: () => void;
+}
+
+export function PortForm({ open, onOpenChange, port, onSuccess }: PortFormProps) {
+  const [name, setName] = useState('');
+  const [slug, setSlug] = useState('');
+  const [primaryColor, setPrimaryColor] = useState('#0F4C81');
+  const [defaultCurrency, setDefaultCurrency] = useState('USD');
+  const [timezone, setTimezone] = useState('America/Anguilla');
+  const [isActive, setIsActive] = useState(true);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const isEdit = !!port;
+
+  useEffect(() => {
+    if (open) {
+      if (port) {
+        setName(port.name);
+        setSlug(port.slug);
+        setPrimaryColor(port.primaryColor ?? '#0F4C81');
+        setDefaultCurrency(port.defaultCurrency);
+        setTimezone(port.timezone);
+        setIsActive(port.isActive);
+      } else {
+        setName('');
+        setSlug('');
+        setPrimaryColor('#0F4C81');
+        setDefaultCurrency('USD');
+        setTimezone('America/Anguilla');
+        setIsActive(true);
+      }
+      setError(null);
+    }
+  }, [open, port]);
+
+  function handleNameChange(value: string) {
+    setName(value);
+    if (!isEdit) {
+      setSlug(
+        value
+          .toLowerCase()
+          .replace(/[^a-z0-9]+/g, '-')
+          .replace(/^-|-$/g, ''),
+      );
+    }
+  }
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    setError(null);
+    setLoading(true);
+
+    try {
+      if (isEdit) {
+        await apiFetch(`/api/v1/admin/ports/${port.id}`, {
+          method: 'PATCH',
+          body: { name, slug, primaryColor, defaultCurrency, timezone, isActive },
+        });
+      } else {
+        await apiFetch('/api/v1/admin/ports', {
+          method: 'POST',
+          body: { name, slug, primaryColor, defaultCurrency, timezone },
+        });
+      }
+      onSuccess();
+      onOpenChange(false);
+    } catch (err: unknown) {
+      const message = err instanceof Error ? err.message : 'Something went wrong';
+      setError(message);
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  return (
+    <Sheet open={open} onOpenChange={onOpenChange}>
+      <SheetContent className="overflow-y-auto">
+        <SheetHeader>
+          <SheetTitle>{isEdit ? 'Edit Port' : 'New Port'}</SheetTitle>
+        </SheetHeader>
+
+        <form onSubmit={handleSubmit} className="mt-6 space-y-4">
+          <div className="space-y-2">
+            <Label htmlFor="port-name">Name</Label>
+            <Input
+              id="port-name"
+              value={name}
+              onChange={(e) => handleNameChange(e.target.value)}
+              placeholder="Port Nimara"
+              required
+            />
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="port-slug">Slug</Label>
+            <Input
+              id="port-slug"
+              value={slug}
+              onChange={(e) => setSlug(e.target.value)}
+              placeholder="port-nimara"
+              pattern="^[a-z0-9-]+$"
+              required
+            />
+            <p className="text-xs text-muted-foreground">
+              Used in URLs. Lowercase letters, numbers, and hyphens only.
+            </p>
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="port-color">Brand Color</Label>
+            <div className="flex items-center gap-2">
+              <input
+                type="color"
+                id="port-color"
+                value={primaryColor}
+                onChange={(e) => setPrimaryColor(e.target.value)}
+                className="h-9 w-9 rounded border cursor-pointer"
+              />
+              <Input
+                value={primaryColor}
+                onChange={(e) => setPrimaryColor(e.target.value)}
+                placeholder="#0F4C81"
+                className="w-28 font-mono text-sm"
+                maxLength={7}
+              />
+            </div>
+          </div>
+
+          <div className="grid grid-cols-2 gap-4">
+            <div className="space-y-2">
+              <Label htmlFor="port-currency">Currency</Label>
+              <Input
+                id="port-currency"
+                value={defaultCurrency}
+                onChange={(e) => setDefaultCurrency(e.target.value.toUpperCase())}
+                placeholder="USD"
+                maxLength={3}
+                required
+              />
+            </div>
+
+            <div className="space-y-2">
+              <Label htmlFor="port-timezone">Timezone</Label>
+              <Input
+                id="port-timezone"
+                value={timezone}
+                onChange={(e) => setTimezone(e.target.value)}
+                placeholder="America/Anguilla"
+                required
+              />
+            </div>
+          </div>
+
+          {isEdit && (
+            <div className="flex items-center justify-between rounded-lg border p-3">
+              <div>
+                <Label htmlFor="port-active">Port Active</Label>
+                <p className="text-xs text-muted-foreground">
+                  Inactive ports are hidden from users
+                </p>
+              </div>
+              <Switch id="port-active" checked={isActive} onCheckedChange={setIsActive} />
+            </div>
+          )}
+
+          {error && <p className="text-sm text-destructive">{error}</p>}
+
+          <SheetFooter>
+            <Button
+              type="button"
+              variant="outline"
+              onClick={() => onOpenChange(false)}
+              disabled={loading}
+            >
+              Cancel
+            </Button>
+            <Button type="submit" disabled={loading || !name.trim() || !slug.trim()}>
+              {loading ? 'Saving...' : isEdit ? 'Save Changes' : 'Create Port'}
+            </Button>
+          </SheetFooter>
+        </form>
+      </SheetContent>
+    </Sheet>
+  );
+}
diff --git a/src/components/admin/ports/port-list.tsx b/src/components/admin/ports/port-list.tsx
new file mode 100644
index 0000000..d48aea3
--- /dev/null
+++ b/src/components/admin/ports/port-list.tsx
@@ -0,0 +1,147 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { type ColumnDef } from '@tanstack/react-table';
+import { Pencil, Plus } from 'lucide-react';
+
+import { DataTable } from '@/components/shared/data-table';
+import { PageHeader } from '@/components/shared/page-header';
+import { Button } from '@/components/ui/button';
+import { Badge } from '@/components/ui/badge';
+import { apiFetch } from '@/lib/api/client';
+import { PortForm } from './port-form';
+
+interface PortRow {
+  id: string;
+  name: string;
+  slug: string;
+  logoUrl: string | null;
+  primaryColor: string | null;
+  defaultCurrency: string;
+  timezone: string;
+  isActive: boolean;
+  settings: Record<string, unknown>;
+  createdAt: string;
+}
+
+export function PortList() {
+  const [ports, setPorts] = useState<PortRow[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [formOpen, setFormOpen] = useState(false);
+  const [editingPort, setEditingPort] = useState<PortRow | null>(null);
+
+  const fetchPorts = useCallback(async () => {
+    setLoading(true);
+    try {
+      const res = await apiFetch<{ data: PortRow[] }>('/api/v1/admin/ports');
+      setPorts(res.data);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void fetchPorts();
+  }, [fetchPorts]);
+
+  function handleNewPort() {
+    setEditingPort(null);
+    setFormOpen(true);
+  }
+
+  function handleEditPort(port: PortRow) {
+    setEditingPort(port);
+    setFormOpen(true);
+  }
+
+  const columns: ColumnDef<PortRow, unknown>[] = [
+    {
+      accessorKey: 'name',
+      header: 'Name',
+      cell: ({ row }) => (
+        <div className="flex items-center gap-2">
+          {row.original.primaryColor && (
+            <span
+              className="inline-block h-3 w-3 rounded-full"
+              style={{ backgroundColor: row.original.primaryColor }}
+            />
+          )}
+          <span className="font-medium">{row.original.name}</span>
+        </div>
+      ),
+    },
+    {
+      accessorKey: 'slug',
+      header: 'Slug',
+      cell: ({ row }) => (
+        <code className="text-xs bg-muted px-1.5 py-0.5 rounded">{row.original.slug}</code>
+      ),
+    },
+    {
+      accessorKey: 'defaultCurrency',
+      header: 'Currency',
+    },
+    {
+      accessorKey: 'timezone',
+      header: 'Timezone',
+    },
+    {
+      accessorKey: 'isActive',
+      header: 'Status',
+      cell: ({ row }) =>
+        row.original.isActive ? (
+          <Badge variant="default" className="bg-green-600">
+            Active
+          </Badge>
+        ) : (
+          <Badge variant="destructive">Inactive</Badge>
+        ),
+    },
+    {
+      id: 'actions',
+      header: '',
+      cell: ({ row }) => (
+        <Button variant="ghost" size="sm" onClick={() => handleEditPort(row.original)}>
+          <Pencil className="h-4 w-4" />
+          <span className="sr-only">Edit</span>
+        </Button>
+      ),
+      enableSorting: false,
+      size: 60,
+    },
+  ];
+
+  return (
+    <div>
+      <PageHeader
+        title="Port Management"
+        description="Manage marina ports and their configuration"
+        actions={
+          <Button onClick={handleNewPort}>
+            <Plus className="mr-1.5 h-4 w-4" />
+            New Port
+          </Button>
+        }
+      />
+
+      <DataTable
+        columns={columns}
+        data={ports}
+        isLoading={loading}
+        getRowId={(row) => row.id}
+        emptyState={
+          <div className="text-center py-8">
+            <p className="text-muted-foreground">No ports configured.</p>
+          </div>
+        }
+      />
+
+      <PortForm
+        open={formOpen}
+        onOpenChange={setFormOpen}
+        port={editingPort}
+        onSuccess={fetchPorts}
+      />
+    </div>
+  );
+}
diff --git a/src/components/admin/settings/settings-manager.tsx b/src/components/admin/settings/settings-manager.tsx
new file mode 100644
index 0000000..3f630d7
--- /dev/null
+++ b/src/components/admin/settings/settings-manager.tsx
@@ -0,0 +1,340 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { Trash2, Plus, Save } from 'lucide-react';
+
+import { PageHeader } from '@/components/shared/page-header';
+import { ConfirmationDialog } from '@/components/shared/confirmation-dialog';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { Switch } from '@/components/ui/switch';
+import { Textarea } from '@/components/ui/textarea';
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { Separator } from '@/components/ui/separator';
+import { apiFetch } from '@/lib/api/client';
+
+interface Setting {
+  key: string;
+  value: unknown;
+  portId: string | null;
+  updatedBy: string | null;
+  updatedAt: string;
+}
+
+/** Well-known settings with their display metadata */
+const KNOWN_SETTINGS: Array<{
+  key: string;
+  label: string;
+  description: string;
+  type: 'boolean' | 'number' | 'json';
+  defaultValue: unknown;
+}> = [
+  {
+    key: 'ai_interest_scoring',
+    label: 'AI Interest Scoring',
+    description: 'Enable AI-powered interest scoring based on engagement signals',
+    type: 'boolean',
+    defaultValue: false,
+  },
+  {
+    key: 'ai_email_drafts',
+    label: 'AI Email Drafts',
+    description: 'Enable AI-assisted email draft generation',
+    type: 'boolean',
+    defaultValue: false,
+  },
+  {
+    key: 'invoice_net10_discount',
+    label: 'Net-10 Invoice Discount (%)',
+    description: 'Discount percentage applied when payment terms are net-10',
+    type: 'number',
+    defaultValue: 2,
+  },
+  {
+    key: 'pipeline_weights',
+    label: 'Pipeline Stage Weights',
+    description: 'Probability weights for revenue forecast by pipeline stage (JSON)',
+    type: 'json',
+    defaultValue: {
+      open: 0.05,
+      details_sent: 0.1,
+      in_communication: 0.2,
+      signed_eoi_nda: 0.4,
+      deposit_10pct: 0.6,
+      contract: 0.8,
+      completed: 1.0,
+    },
+  },
+  {
+    key: 'berth_rules',
+    label: 'Berth Status Rules',
+    description: 'Auto/suggest/off rules for berth status transitions (JSON)',
+    type: 'json',
+    defaultValue: [],
+  },
+];
+
+export function SettingsManager() {
+  const [portSettings, setPortSettings] = useState<Setting[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState<string | null>(null);
+  const [values, setValues] = useState<Record<string, unknown>>({});
+  const [customKey, setCustomKey] = useState('');
+  const [customValue, setCustomValue] = useState('');
+
+  const fetchSettings = useCallback(async () => {
+    setLoading(true);
+    try {
+      const res = await apiFetch<{ data: { portSettings: Setting[]; globalSettings: Setting[] } }>(
+        '/api/v1/admin/settings',
+      );
+      setPortSettings(res.data.portSettings);
+
+      // Build values map from existing settings
+      const vals: Record<string, unknown> = {};
+      for (const s of res.data.portSettings) {
+        vals[s.key] = s.value;
+      }
+      setValues(vals);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void fetchSettings();
+  }, [fetchSettings]);
+
+  async function saveSetting(key: string, value: unknown) {
+    setSaving(key);
+    try {
+      await apiFetch('/api/v1/admin/settings', {
+        method: 'PUT',
+        body: { key, value },
+      });
+      await fetchSettings();
+    } finally {
+      setSaving(null);
+    }
+  }
+
+  async function handleDeleteSetting(key: string) {
+    await apiFetch('/api/v1/admin/settings', {
+      method: 'DELETE',
+      body: { key },
+    });
+    await fetchSettings();
+  }
+
+  async function handleAddCustom() {
+    if (!customKey.trim()) return;
+    let parsed: unknown;
+    try {
+      parsed = JSON.parse(customValue);
+    } catch {
+      parsed = customValue;
+    }
+    await saveSetting(customKey, parsed);
+    setCustomKey('');
+    setCustomValue('');
+  }
+
+  function getEffectiveValue(key: string, defaultValue: unknown): unknown {
+    return values[key] ?? defaultValue;
+  }
+
+  if (loading) {
+    return (
+      <div>
+        <PageHeader title="System Settings" description="Configure system behavior for this port" />
+        <div className="flex items-center justify-center py-12 text-muted-foreground">
+          Loading...
+        </div>
+      </div>
+    );
+  }
+
+  // Custom settings = port settings that aren't in KNOWN_SETTINGS
+  const knownKeys = new Set(KNOWN_SETTINGS.map((s) => s.key));
+  const customSettings = portSettings.filter((s) => !knownKeys.has(s.key));
+
+  return (
+    <div>
+      <PageHeader title="System Settings" description="Configure system behavior for this port" />
+
+      <div className="space-y-6 mt-6">
+        {/* Feature Flags */}
+        <Card>
+          <CardHeader>
+            <CardTitle>Feature Flags</CardTitle>
+            <CardDescription>Enable or disable optional features</CardDescription>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            {KNOWN_SETTINGS.filter((s) => s.type === 'boolean').map((setting) => (
+              <div key={setting.key} className="flex items-center justify-between">
+                <div>
+                  <Label>{setting.label}</Label>
+                  <p className="text-xs text-muted-foreground">{setting.description}</p>
+                </div>
+                <Switch
+                  checked={getEffectiveValue(setting.key, setting.defaultValue) === true}
+                  disabled={saving === setting.key}
+                  onCheckedChange={(checked) => saveSetting(setting.key, checked)}
+                />
+              </div>
+            ))}
+          </CardContent>
+        </Card>
+
+        {/* Numeric Settings */}
+        <Card>
+          <CardHeader>
+            <CardTitle>Business Rules</CardTitle>
+            <CardDescription>Configure financial and operational parameters</CardDescription>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            {KNOWN_SETTINGS.filter((s) => s.type === 'number').map((setting) => (
+              <div key={setting.key} className="flex items-center justify-between gap-4">
+                <div className="flex-1">
+                  <Label>{setting.label}</Label>
+                  <p className="text-xs text-muted-foreground">{setting.description}</p>
+                </div>
+                <div className="flex items-center gap-2">
+                  <Input
+                    type="number"
+                    className="w-24"
+                    value={String(getEffectiveValue(setting.key, setting.defaultValue) ?? '')}
+                    onChange={(e) =>
+                      setValues((prev) => ({
+                        ...prev,
+                        [setting.key]: parseFloat(e.target.value) || 0,
+                      }))
+                    }
+                  />
+                  <Button
+                    size="sm"
+                    variant="outline"
+                    disabled={saving === setting.key}
+                    onClick={() =>
+                      saveSetting(setting.key, values[setting.key] ?? setting.defaultValue)
+                    }
+                  >
+                    <Save className="h-3.5 w-3.5" />
+                  </Button>
+                </div>
+              </div>
+            ))}
+          </CardContent>
+        </Card>
+
+        {/* JSON Settings */}
+        <Card>
+          <CardHeader>
+            <CardTitle>Advanced Configuration</CardTitle>
+            <CardDescription>
+              JSON-based settings for pipeline weights and berth rules
+            </CardDescription>
+          </CardHeader>
+          <CardContent className="space-y-6">
+            {KNOWN_SETTINGS.filter((s) => s.type === 'json').map((setting) => {
+              const currentValue = getEffectiveValue(setting.key, setting.defaultValue);
+              const jsonStr =
+                values[`${setting.key}_edit`] !== undefined
+                  ? String(values[`${setting.key}_edit`])
+                  : JSON.stringify(currentValue, null, 2);
+              return (
+                <div key={setting.key} className="space-y-2">
+                  <Label>{setting.label}</Label>
+                  <p className="text-xs text-muted-foreground">{setting.description}</p>
+                  <Textarea
+                    className="font-mono text-xs"
+                    rows={6}
+                    value={jsonStr}
+                    onChange={(e) =>
+                      setValues((prev) => ({ ...prev, [`${setting.key}_edit`]: e.target.value }))
+                    }
+                  />
+                  <Button
+                    size="sm"
+                    disabled={saving === setting.key}
+                    onClick={() => {
+                      try {
+                        const parsed = JSON.parse(
+                          String(values[`${setting.key}_edit`] ?? JSON.stringify(currentValue)),
+                        );
+                        void saveSetting(setting.key, parsed);
+                      } catch {
+                        // invalid JSON — do nothing
+                      }
+                    }}
+                  >
+                    {saving === setting.key ? 'Saving...' : 'Save'}
+                  </Button>
+                </div>
+              );
+            })}
+          </CardContent>
+        </Card>
+
+        {/* Custom Settings */}
+        <Card>
+          <CardHeader>
+            <CardTitle>Custom Settings</CardTitle>
+            <CardDescription>Additional key-value settings for this port</CardDescription>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            {customSettings.map((setting) => (
+              <div key={setting.key} className="flex items-center justify-between gap-2">
+                <div>
+                  <code className="text-sm font-mono">{setting.key}</code>
+                  <p className="text-xs text-muted-foreground">
+                    {typeof setting.value === 'object'
+                      ? JSON.stringify(setting.value)
+                      : String(setting.value)}
+                  </p>
+                </div>
+                <ConfirmationDialog
+                  trigger={
+                    <Button
+                      variant="ghost"
+                      size="sm"
+                      className="text-destructive hover:text-destructive"
+                    >
+                      <Trash2 className="h-4 w-4" />
+                    </Button>
+                  }
+                  title="Delete Setting"
+                  description={`Delete "${setting.key}"? This may affect system behavior.`}
+                  confirmLabel="Delete"
+                  onConfirm={() => handleDeleteSetting(setting.key)}
+                />
+              </div>
+            ))}
+
+            <Separator />
+
+            <div className="flex gap-2">
+              <Input
+                placeholder="Key"
+                value={customKey}
+                onChange={(e) => setCustomKey(e.target.value)}
+                className="w-40"
+              />
+              <Input
+                placeholder="Value (JSON or string)"
+                value={customValue}
+                onChange={(e) => setCustomValue(e.target.value)}
+                className="flex-1"
+              />
+              <Button variant="outline" onClick={handleAddCustom} disabled={!customKey.trim()}>
+                <Plus className="mr-1 h-4 w-4" />
+                Add
+              </Button>
+            </div>
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  );
+}
diff --git a/src/lib/services/ports.service.ts b/src/lib/services/ports.service.ts
new file mode 100644
index 0000000..a06ed0c
--- /dev/null
+++ b/src/lib/services/ports.service.ts
@@ -0,0 +1,110 @@
+import { eq } from 'drizzle-orm';
+
+import { db } from '@/lib/db';
+import { ports } from '@/lib/db/schema';
+import type { PortSettings } from '@/lib/db/schema/ports';
+import { createAuditLog } from '@/lib/audit';
+import { ConflictError, NotFoundError } from '@/lib/errors';
+import { emitToRoom } from '@/lib/socket/server';
+import type { CreatePortInput, UpdatePortInput } from '@/lib/validators/ports';
+
+interface AuditMeta {
+  userId: string;
+  portId: string;
+  ipAddress: string;
+  userAgent: string;
+}
+
+export async function listPorts() {
+  return db.select().from(ports).orderBy(ports.name);
+}
+
+export async function getPort(id: string) {
+  const port = await db.query.ports.findFirst({
+    where: eq(ports.id, id),
+  });
+  if (!port) throw new NotFoundError('Port');
+  return port;
+}
+
+export async function createPort(data: CreatePortInput, meta: AuditMeta) {
+  const existing = await db.query.ports.findFirst({
+    where: eq(ports.slug, data.slug),
+  });
+  if (existing) {
+    throw new ConflictError(`A port with slug "${data.slug}" already exists`);
+  }
+
+  const [port] = await db
+    .insert(ports)
+    .values({
+      name: data.name,
+      slug: data.slug,
+      logoUrl: data.logoUrl ?? null,
+      primaryColor: data.primaryColor ?? null,
+      defaultCurrency: data.defaultCurrency,
+      timezone: data.timezone,
+    })
+    .returning();
+
+  void createAuditLog({
+    userId: meta.userId,
+    portId: meta.portId,
+    action: 'create',
+    entityType: 'port',
+    entityId: port!.id,
+    newValue: { name: port!.name, slug: port!.slug },
+    ipAddress: meta.ipAddress,
+    userAgent: meta.userAgent,
+  });
+
+  return port!;
+}
+
+export async function updatePort(id: string, data: UpdatePortInput, meta: AuditMeta) {
+  const port = await db.query.ports.findFirst({
+    where: eq(ports.id, id),
+  });
+  if (!port) throw new NotFoundError('Port');
+
+  if (data.slug && data.slug !== port.slug) {
+    const conflict = await db.query.ports.findFirst({
+      where: eq(ports.slug, data.slug),
+    });
+    if (conflict) {
+      throw new ConflictError(`A port with slug "${data.slug}" already exists`);
+    }
+  }
+
+  const updates: Record<string, unknown> = { updatedAt: new Date() };
+  if (data.name !== undefined) updates.name = data.name;
+  if (data.slug !== undefined) updates.slug = data.slug;
+  if (data.logoUrl !== undefined) updates.logoUrl = data.logoUrl;
+  if (data.primaryColor !== undefined) updates.primaryColor = data.primaryColor;
+  if (data.defaultCurrency !== undefined) updates.defaultCurrency = data.defaultCurrency;
+  if (data.timezone !== undefined) updates.timezone = data.timezone;
+  if (data.isActive !== undefined) updates.isActive = data.isActive;
+  if (data.settings !== undefined) updates.settings = data.settings as PortSettings;
+
+  const [updated] = await db.update(ports).set(updates).where(eq(ports.id, id)).returning();
+
+  void createAuditLog({
+    userId: meta.userId,
+    portId: meta.portId,
+    action: 'update',
+    entityType: 'port',
+    entityId: id,
+    oldValue: { name: port.name, slug: port.slug, isActive: port.isActive },
+    newValue: { name: updated!.name, slug: updated!.slug, isActive: updated!.isActive },
+    ipAddress: meta.ipAddress,
+    userAgent: meta.userAgent,
+  });
+
+  emitToRoom(`port:${id}`, 'system:alert', {
+    alertType: 'port:updated',
+    message: `Port "${updated!.name}" updated`,
+    severity: 'info',
+  });
+
+  return updated!;
+}
diff --git a/src/lib/services/settings.service.ts b/src/lib/services/settings.service.ts
new file mode 100644
index 0000000..704cd59
--- /dev/null
+++ b/src/lib/services/settings.service.ts
@@ -0,0 +1,107 @@
+import { and, eq, isNull } from 'drizzle-orm';
+
+import { db } from '@/lib/db';
+import { systemSettings } from '@/lib/db/schema';
+import { createAuditLog } from '@/lib/audit';
+import { NotFoundError } from '@/lib/errors';
+import { emitToRoom } from '@/lib/socket/server';
+
+interface AuditMeta {
+  userId: string;
+  portId: string;
+  ipAddress: string;
+  userAgent: string;
+}
+
+export async function listSettings(portId: string) {
+  // Get port-specific settings
+  const portSettings = await db
+    .select()
+    .from(systemSettings)
+    .where(eq(systemSettings.portId, portId))
+    .orderBy(systemSettings.key);
+
+  // Get global settings (portId is null)
+  const globalSettings = await db
+    .select()
+    .from(systemSettings)
+    .where(isNull(systemSettings.portId))
+    .orderBy(systemSettings.key);
+
+  return { portSettings, globalSettings };
+}
+
+export async function getSetting(key: string, portId: string) {
+  // Try port-specific first, fall back to global
+  const setting = await db.query.systemSettings.findFirst({
+    where: and(eq(systemSettings.key, key), eq(systemSettings.portId, portId)),
+  });
+  if (setting) return setting;
+
+  const global = await db.query.systemSettings.findFirst({
+    where: and(eq(systemSettings.key, key), isNull(systemSettings.portId)),
+  });
+  return global ?? null;
+}
+
+export async function upsertSetting(key: string, value: unknown, portId: string, meta: AuditMeta) {
+  const existing = await db.query.systemSettings.findFirst({
+    where: and(eq(systemSettings.key, key), eq(systemSettings.portId, portId)),
+  });
+
+  if (existing) {
+    await db
+      .update(systemSettings)
+      .set({ value, updatedBy: meta.userId, updatedAt: new Date() })
+      .where(and(eq(systemSettings.key, key), eq(systemSettings.portId, portId)));
+  } else {
+    await db.insert(systemSettings).values({
+      key,
+      value,
+      portId,
+      updatedBy: meta.userId,
+    });
+  }
+
+  void createAuditLog({
+    userId: meta.userId,
+    portId,
+    action: existing ? 'update' : 'create',
+    entityType: 'setting',
+    entityId: key,
+    oldValue: existing ? { value: existing.value } : undefined,
+    newValue: { value },
+    ipAddress: meta.ipAddress,
+    userAgent: meta.userAgent,
+  });
+
+  emitToRoom(`port:${portId}`, 'system:alert', {
+    alertType: 'setting:updated',
+    message: `Setting "${key}" updated`,
+    severity: 'info',
+  });
+
+  return { key, value, portId };
+}
+
+export async function deleteSetting(key: string, portId: string, meta: AuditMeta) {
+  const existing = await db.query.systemSettings.findFirst({
+    where: and(eq(systemSettings.key, key), eq(systemSettings.portId, portId)),
+  });
+  if (!existing) throw new NotFoundError('Setting');
+
+  await db
+    .delete(systemSettings)
+    .where(and(eq(systemSettings.key, key), eq(systemSettings.portId, portId)));
+
+  void createAuditLog({
+    userId: meta.userId,
+    portId,
+    action: 'delete',
+    entityType: 'setting',
+    entityId: key,
+    oldValue: { value: existing.value },
+    ipAddress: meta.ipAddress,
+    userAgent: meta.userAgent,
+  });
+}
diff --git a/src/lib/validators/ports.ts b/src/lib/validators/ports.ts
new file mode 100644
index 0000000..0c601b7
--- /dev/null
+++ b/src/lib/validators/ports.ts
@@ -0,0 +1,41 @@
+import { z } from 'zod';
+
+export const createPortSchema = z.object({
+  name: z.string().min(1).max(200),
+  slug: z
+    .string()
+    .min(1)
+    .max(100)
+    .regex(/^[a-z0-9-]+$/, 'Slug must be lowercase alphanumeric with hyphens'),
+  logoUrl: z.string().url().optional(),
+  primaryColor: z
+    .string()
+    .regex(/^#[0-9a-fA-F]{6}$/)
+    .optional(),
+  defaultCurrency: z.string().length(3).default('USD'),
+  timezone: z.string().min(1).default('America/Anguilla'),
+});
+
+export type CreatePortInput = z.infer<typeof createPortSchema>;
+
+export const updatePortSchema = z.object({
+  name: z.string().min(1).max(200).optional(),
+  slug: z
+    .string()
+    .min(1)
+    .max(100)
+    .regex(/^[a-z0-9-]+$/, 'Slug must be lowercase alphanumeric with hyphens')
+    .optional(),
+  logoUrl: z.string().url().nullable().optional(),
+  primaryColor: z
+    .string()
+    .regex(/^#[0-9a-fA-F]{6}$/)
+    .nullable()
+    .optional(),
+  defaultCurrency: z.string().length(3).optional(),
+  timezone: z.string().min(1).optional(),
+  isActive: z.boolean().optional(),
+  settings: z.record(z.string(), z.unknown()).optional(),
+});
+
+export type UpdatePortInput = z.infer<typeof updatePortSchema>;
diff --git a/src/lib/validators/settings.ts b/src/lib/validators/settings.ts
new file mode 100644
index 0000000..a7ebb88
--- /dev/null
+++ b/src/lib/validators/settings.ts
@@ -0,0 +1,14 @@
+import { z } from 'zod';
+
+export const upsertSettingSchema = z.object({
+  key: z.string().min(1).max(100),
+  value: z.unknown(),
+});
+
+export type UpsertSettingInput = z.infer<typeof upsertSettingSchema>;
+
+export const deleteSettingSchema = z.object({
+  key: z.string().min(1).max(100),
+});
+
+export type DeleteSettingInput = z.infer<typeof deleteSettingSchema>;