fix: respect ios safe areas

app/globals.css

@@ -46,7 +46,7 @@ html {
 }
 
 body {
-  min-height: 100vh;
+  min-height: 100dvh;
   background: hsl(var(--background));
   color: hsl(var(--foreground));
   -webkit-font-smoothing: antialiased;
@@ -89,12 +89,56 @@ select {
     scrollbar-gutter: stable;
   }
 
+  .app-header-safe {
+    padding-top: env(safe-area-inset-top);
+  }
+
+  .app-main-safe {
+    padding-bottom: calc(7rem + env(safe-area-inset-bottom));
+  }
+
+  .mobile-nav-safe {
+    bottom: calc(0.75rem + env(safe-area-inset-bottom));
+    left: calc(0.75rem + env(safe-area-inset-left));
+    right: calc(0.75rem + env(safe-area-inset-right));
+  }
+
   .modal-overlay {
     position: fixed;
     inset: -1px 0 0;
+    box-sizing: border-box;
+    height: calc(100dvh + 1px);
     min-height: calc(100dvh + 1px);
     background: hsl(var(--foreground) / 0.55);
   }
+
+  .modal-safe-area {
+    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
+  }
+}
+
+@media (min-width: 640px) {
+  @layer utilities {
+    .modal-safe-area {
+      padding:
+        calc(1rem + env(safe-area-inset-top))
+        calc(1rem + env(safe-area-inset-right))
+        calc(1rem + env(safe-area-inset-bottom))
+        calc(1rem + env(safe-area-inset-left));
+    }
+  }
+}
+
+@media (min-width: 1024px) {
+  @layer utilities {
+    .modal-safe-area {
+      padding:
+        calc(2rem + env(safe-area-inset-top))
+        calc(2rem + env(safe-area-inset-right))
+        calc(2rem + env(safe-area-inset-bottom))
+        calc(2rem + env(safe-area-inset-left));
+    }
+  }
 }
 
 @supports (-moz-appearance: none) {

components/forecast/day-forecast-modal.tsx

@@ -88,7 +88,7 @@ export function DayForecastModal({
     <AnimatePresence>
       {day ? (
         <motion.div
-          className="modal-overlay z-[90] flex items-center justify-center p-0 sm:p-4 lg:p-8"
+          className="modal-overlay modal-safe-area z-[90] flex items-center justify-center"
           initial={{ opacity: 0 }}
           animate={{ opacity: 1 }}
           exit={{ opacity: 0 }}
@@ -98,7 +98,7 @@ export function DayForecastModal({
             role="dialog"
             aria-modal="true"
             aria-labelledby="day-forecast-title"
-            className="h-full w-full overflow-hidden bg-background shadow-card sm:max-w-6xl sm:rounded-panel sm:border sm:border-border/70"
+            className="h-full max-h-full w-full overflow-hidden bg-background shadow-card sm:max-w-6xl sm:rounded-panel sm:border sm:border-border/70"
             initial={{ opacity: 0, y: 28, scale: 0.985 }}
             animate={{ opacity: 1, y: 0, scale: 1 }}
             exit={{ opacity: 0, y: 20, scale: 0.99 }}

components/layout/app-shell.tsx

@@ -15,7 +15,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
   const { t } = useI18n();
   return (
     <div className="min-h-screen overflow-x-hidden bg-background">
-      <header className="sticky top-0 z-40 border-b border-border/70 bg-surface">
+      <header className="app-header-safe sticky top-0 z-40 border-b border-border/70 bg-surface">
         <div className="mx-auto flex max-w-7xl items-center justify-between px-4 py-3 sm:px-6 lg:px-8">
           <Link href="/" className="text-2xl font-semibold tracking-[-0.09em] text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent">
             wtr<span className="text-accent">.</span>
@@ -35,8 +35,8 @@ export function AppShell({ children }: { children: React.ReactNode }) {
           </div>
         </div>
       </header>
-      <main className="mx-auto max-w-7xl px-4 pb-28 pt-5 sm:px-6 sm:pt-8 lg:px-8">{children}</main>
-      <nav aria-label={t("nav.mobile")} className="fixed inset-x-3 bottom-3 z-50 flex justify-around rounded-panel border border-border/70 bg-surface p-1.5 shadow-card md:hidden">
+      <main className="app-main-safe mx-auto max-w-7xl px-4 pt-5 sm:px-6 sm:pt-8 lg:px-8">{children}</main>
+      <nav aria-label={t("nav.mobile")} className="mobile-nav-safe fixed z-50 flex justify-around rounded-panel border border-border/70 bg-surface p-1.5 shadow-card md:hidden">
         {NAV_ITEMS.map((item, index) => {
           const Icon = icons[index];
           const active = item.href === "/" ? pathname === "/" : pathname.startsWith(item.href);