feat: add responsive case study sharing

src/components/CaseStudyDrawer.module.css

@@ -528,6 +528,163 @@
   border-color: rgba(255, 255, 255, 0.16);
 }
 
+.shareDialog {
+  position: fixed;
+  inset: 0;
+  display: grid;
+  width: 100vw;
+  max-width: none;
+  height: 100dvh;
+  max-height: none;
+  margin: 0;
+  padding: var(--space-4);
+  place-items: center;
+  overflow: hidden;
+  border: 0;
+  background: transparent;
+  color: var(--text-primary);
+}
+
+.shareDialog:not([open]) {
+  display: none;
+}
+
+.shareDialog::backdrop {
+  background: rgba(1, 13, 39, 0.62);
+  opacity: 0;
+  backdrop-filter: blur(4px);
+  transition: opacity 180ms var(--motion-ease-out);
+}
+
+.shareDialog[data-state='open']::backdrop {
+  opacity: 1;
+}
+
+.shareDialog[data-state='closing']::backdrop {
+  opacity: 0;
+  transition-duration: 140ms;
+}
+
+.sharePanel {
+  width: min(30rem, 100%);
+  padding: var(--space-5);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius-xl);
+  background: var(--bg-raised);
+  box-shadow: 0 1.5rem 5rem rgba(1, 13, 39, 0.3);
+  opacity: 0;
+  transform: scale(0.97) translateY(0.5rem);
+  transition:
+    opacity 180ms var(--motion-ease-out),
+    transform 180ms var(--motion-ease-out);
+}
+
+.shareDialog[data-state='open'] .sharePanel {
+  opacity: 1;
+  transform: scale(1) translateY(0);
+}
+
+.shareDialog[data-state='closing'] .sharePanel {
+  opacity: 0;
+  transform: scale(0.98) translateY(0.25rem);
+  transition-duration: 140ms;
+}
+
+.shareDialog[data-motion='none'] .sharePanel,
+.shareDialog[data-motion='none']::backdrop {
+  transition-duration: 0ms;
+}
+
+.shareHeader {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: var(--space-4);
+  padding-bottom: var(--space-4);
+  border-bottom: 1px solid var(--border-default);
+}
+
+.shareHeader h2 {
+  margin-bottom: var(--space-1);
+  color: var(--text-primary);
+  font-size: var(--font-size-h3);
+  line-height: var(--line-height-h3);
+}
+
+.shareHeader p {
+  max-width: 22rem;
+  color: var(--text-secondary);
+  font-size: var(--font-size-body-small);
+  line-height: var(--line-height-body-small);
+}
+
+.shareOptions {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: var(--space-3);
+  margin-block: var(--space-5);
+}
+
+.shareOptions a {
+  display: flex;
+  min-width: 0;
+  min-height: 5rem;
+  align-items: center;
+  justify-content: center;
+  flex-direction: column;
+  gap: var(--space-2);
+  padding: var(--space-3) var(--space-2);
+  border: 1px solid var(--border-default);
+  border-radius: var(--radius-lg);
+  background: var(--bg-surface);
+  color: var(--text-primary);
+  font-size: var(--font-size-label-small);
+  font-weight: 650;
+  text-align: center;
+  transition:
+    border-color var(--motion-duration-fast) ease,
+    background-color var(--motion-duration-fast) ease,
+    transform var(--motion-duration-fast) var(--motion-ease-out);
+}
+
+.shareOptions svg,
+.copyLinkButton svg {
+  width: var(--size-icon-md);
+  height: var(--size-icon-md);
+}
+
+.copyLinkButton {
+  display: flex;
+  width: 100%;
+  min-height: 3rem;
+  align-items: center;
+  justify-content: center;
+  gap: var(--space-2);
+  padding: var(--space-3) var(--space-4);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius-md);
+  background: var(--bg-surface);
+  color: var(--text-primary);
+  cursor: pointer;
+  font: inherit;
+  font-weight: 700;
+  transition:
+    border-color var(--motion-duration-fast) ease,
+    background-color var(--motion-duration-fast) ease,
+    transform var(--motion-duration-fast) var(--motion-ease-out);
+}
+
+.galleryStage:focus-visible,
+.thumbnailButton:focus-visible,
+.viewerThumbnail:focus-visible,
+.viewerIconButton:focus-visible,
+.viewerNavButton:focus-visible,
+.shareOptions a:focus-visible,
+.copyLinkButton:focus-visible {
+  outline: 3px solid var(--focus-ring, var(--accent-default));
+  outline-offset: 3px;
+}
+
 .galleryStage:active,
 .thumbnailButton:active,
 .viewerThumbnail:active,
@@ -535,6 +692,11 @@
   transform: scale(0.97);
 }
 
+.shareOptions a:active,
+.copyLinkButton:active {
+  transform: scale(0.97);
+}
+
 .storyGrid,
 .stackGrid {
   display: grid;
@@ -780,6 +942,14 @@
     justify-content: flex-start;
     padding-inline: var(--space-3);
   }
+
+  .sharePanel {
+    padding: var(--space-4);
+  }
+
+  .shareOptions {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
 }
 
 @media (hover: hover) and (pointer: fine) {
@@ -798,6 +968,12 @@
     opacity: 1;
   }
 
+  .shareOptions a:hover,
+  .copyLinkButton:hover {
+    border-color: var(--accent-default);
+    background: var(--bg-subtle);
+  }
+
   .projectNavLink:hover {
     transform: translateY(-1px);
   }
@@ -822,6 +998,16 @@
     transition-duration: 120ms;
   }
 
+  .sharePanel,
+  .shareDialog::backdrop {
+    transition-duration: 120ms;
+  }
+
+  .sharePanel,
+  .shareDialog[data-state='closing'] .sharePanel {
+    transform: none;
+  }
+
   .thumbnailRail {
     scroll-behavior: auto;
   }

src/components/CaseStudyDrawer.tsx

@@ -1,15 +1,14 @@
 'use client';
 
-import { useCallback, useEffect, useRef, useState, type PointerEvent, type ReactNode } from 'react';
+import { useCallback, useEffect, useRef, type PointerEvent, type ReactNode } from 'react';
-import { Check, Copy, X } from 'lucide-react';
+import { X } from 'lucide-react';
 import { usePathname } from 'next/navigation';
 import { messagesByLocale, type Locale } from '@/i18n/content';
 import { useDismissCaseStudy } from './PortfolioRouteShell';
+import { CaseStudyShare } from './CaseStudyShare';
 import { useDrawerDrag } from './useDrawerDrag';
 import styles from './CaseStudyDrawer.module.css';
 
-type CopyState = 'idle' | 'copied' | 'error';
-
 export function CaseStudyDrawer({ children, locale }: { children: ReactNode; locale: Locale }) {
   const copy = messagesByLocale[locale].projects;
   const pathname = usePathname();
@@ -21,7 +20,6 @@ export function CaseStudyDrawer({ children, locale }: { children: ReactNode; loc
   const closing = useRef(false);
   const returnFocusRef = useRef<HTMLElement | null>(null);
   const backgroundScrollY = useRef(0);
-  const [copyState, setCopyState] = useState<CopyState>('idle');
 
   const finishDismiss = useCallback(() => {
     const dialog = dialogRef.current;
@@ -95,20 +93,10 @@ export function CaseStudyDrawer({ children, locale }: { children: ReactNode; loc
   useEffect(() => {
     scrollRef.current?.scrollTo({ top: 0, behavior: 'auto' });
     requestAnimationFrame(() => {
-      setCopyState('idle');
       dialogRef.current?.querySelector<HTMLElement>('[data-case-study-initial-focus]')?.focus();
     });
   }, [pathname]);
 
-  const copyCurrentLink = async () => {
-    try {
-      await navigator.clipboard.writeText(window.location.href);
-      setCopyState('copied');
-    } catch {
-      setCopyState('error');
-    }
-  };
-
   const handleBackdropDown = (event: PointerEvent<HTMLDialogElement>) => {
     backdropPressed.current = event.target === event.currentTarget;
   };
@@ -118,8 +106,6 @@ export function CaseStudyDrawer({ children, locale }: { children: ReactNode; loc
     backdropPressed.current = false;
   };
 
-  const feedback = copyState === 'copied' ? copy.linkCopied : copyState === 'error' ? copy.copyFailed : '';
-
   return (
     <dialog
       ref={dialogRef}
@@ -141,10 +127,7 @@ export function CaseStudyDrawer({ children, locale }: { children: ReactNode; loc
           </div>
           <span className={styles.drawerLabel}>{copy.drawerLabel}</span>
           <div className={styles.actions}>
-            <button type="button" className={styles.actionButton} onClick={copyCurrentLink} aria-label={copy.copyLink}>
+            <CaseStudyShare locale={locale} />
-              {copyState === 'copied' ? <Check size={19} aria-hidden="true" /> : <Copy size={18} aria-hidden="true" />}
-              <span className={styles.actionText}>{copyState === 'copied' ? copy.linkCopied : copy.copyLink}</span>
-            </button>
             <button
               type="button"
               className={styles.iconButton}
@@ -156,7 +139,6 @@ export function CaseStudyDrawer({ children, locale }: { children: ReactNode; loc
               <X size={21} aria-hidden="true" />
             </button>
           </div>
-          <span className={styles.liveRegion} aria-live="polite">{feedback}</span>
         </div>
         <div ref={scrollRef} className={styles.scrollArea}>{children}</div>
       </div>

src/components/CaseStudyShare.tsx

@@ -0,0 +1,171 @@
+'use client';
+
+import {
+  Check,
+  Copy,
+  Linkedin,
+  Mail,
+  MessageCircle,
+  Send,
+  Share2,
+  X,
+} from 'lucide-react';
+import {
+  useCallback,
+  useEffect,
+  useRef,
+  useState,
+  type MouseEvent,
+} from 'react';
+import { messagesByLocale, type Locale } from '@/i18n/content';
+import styles from './CaseStudyDrawer.module.css';
+
+type CopyState = 'idle' | 'copied' | 'error';
+
+export function CaseStudyShare({ locale }: { locale: Locale }) {
+  const copy = messagesByLocale[locale].projects;
+  const triggerRef = useRef<HTMLButtonElement>(null);
+  const dialogRef = useRef<HTMLDialogElement>(null);
+  const closeRef = useRef<HTMLButtonElement>(null);
+  const skipMotionRef = useRef(false);
+  const [fallbackOpen, setFallbackOpen] = useState(false);
+  const [copyState, setCopyState] = useState<CopyState>('idle');
+  const [shareData, setShareData] = useState({ title: '', url: '' });
+
+  useEffect(() => {
+    const dialog = dialogRef.current;
+    if (!dialog) return;
+
+    if (fallbackOpen && !dialog.open) {
+      dialog.dataset.motion = skipMotionRef.current ? 'none' : 'standard';
+      dialog.showModal();
+      requestAnimationFrame(() => {
+        dialog.dataset.state = 'open';
+        closeRef.current?.focus();
+      });
+    }
+
+    if (!fallbackOpen && dialog.open) dialog.close();
+  }, [fallbackOpen]);
+
+  const openFallback = useCallback((skipMotion: boolean) => {
+    skipMotionRef.current = skipMotion;
+    setCopyState('idle');
+    setShareData({ title: document.title, url: window.location.href });
+    setFallbackOpen(true);
+  }, []);
+
+  const closeFallback = useCallback(() => {
+    const dialog = dialogRef.current;
+    if (!dialog?.open) return;
+    const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+    if (reduceMotion || dialog.dataset.motion === 'none') {
+      dialog.close();
+      setFallbackOpen(false);
+      triggerRef.current?.focus({ preventScroll: true });
+      return;
+    }
+
+    dialog.dataset.state = 'closing';
+    window.setTimeout(() => {
+      dialog.close();
+      setFallbackOpen(false);
+      triggerRef.current?.focus({ preventScroll: true });
+    }, 140);
+  }, []);
+
+  const handleShare = async (event: MouseEvent<HTMLButtonElement>) => {
+    const data = { title: document.title, url: window.location.href };
+    const useNativeShare = window.matchMedia('(max-width: 1100px)').matches
+      && typeof navigator.share === 'function';
+
+    if (useNativeShare) {
+      try {
+        await navigator.share(data);
+        return;
+      } catch (error) {
+        if (error instanceof DOMException && error.name === 'AbortError') return;
+      }
+    }
+
+    openFallback(event.detail === 0);
+  };
+
+  const copyCurrentLink = async () => {
+    try {
+      await navigator.clipboard.writeText(shareData.url);
+      setCopyState('copied');
+    } catch {
+      setCopyState('error');
+    }
+  };
+
+  const encodedUrl = encodeURIComponent(shareData.url);
+  const encodedTitle = encodeURIComponent(shareData.title);
+  const encodedMessage = encodeURIComponent(`${shareData.title} ${shareData.url}`);
+  const feedback = copyState === 'copied' ? copy.linkCopied : copyState === 'error' ? copy.copyFailed : '';
+
+  return (
+    <>
+      <button
+        ref={triggerRef}
+        type="button"
+        className={styles.actionButton}
+        onClick={handleShare}
+        aria-label={copy.shareCaseStudy}
+        aria-haspopup="dialog"
+      >
+        <Share2 size={19} aria-hidden="true" />
+        <span className={styles.actionText}>{copy.shareLabel}</span>
+      </button>
+
+      <dialog
+        ref={dialogRef}
+        className={styles.shareDialog}
+        aria-labelledby="case-study-share-title"
+        aria-describedby="case-study-share-description"
+        data-state="opening"
+        onCancel={(event) => {
+          event.preventDefault();
+          closeFallback();
+        }}
+        onClick={(event) => {
+          if (event.target === event.currentTarget) closeFallback();
+        }}
+      >
+        <section className={styles.sharePanel} onClick={(event) => event.stopPropagation()}>
+          <header className={styles.shareHeader}>
+            <div>
+              <h2 id="case-study-share-title">{copy.shareDialogTitle}</h2>
+              <p id="case-study-share-description">{copy.shareDialogDescription}</p>
+            </div>
+            <button ref={closeRef} type="button" className={styles.iconButton} onClick={closeFallback} aria-label={copy.closeShareDialog}>
+              <X size={21} aria-hidden="true" />
+            </button>
+          </header>
+
+          <div className={styles.shareOptions}>
+            <a href={`https://t.me/share/url?url=${encodedUrl}&text=${encodedTitle}`} target="_blank" rel="noopener noreferrer">
+              <Send aria-hidden="true" /><span>{copy.shareTelegram}</span>
+            </a>
+            <a href={`https://wa.me/?text=${encodedMessage}`} target="_blank" rel="noopener noreferrer">
+              <MessageCircle aria-hidden="true" /><span>{copy.shareWhatsApp}</span>
+            </a>
+            <a href={`https://www.linkedin.com/sharing/share-offsite/?url=${encodedUrl}`} target="_blank" rel="noopener noreferrer">
+              <Linkedin aria-hidden="true" /><span>{copy.shareLinkedIn}</span>
+            </a>
+            <a href={`mailto:?subject=${encodedTitle}&body=${encodedMessage}`}>
+              <Mail aria-hidden="true" /><span>{copy.shareEmail}</span>
+            </a>
+          </div>
+
+          <button type="button" className={styles.copyLinkButton} onClick={copyCurrentLink}>
+            {copyState === 'copied' ? <Check aria-hidden="true" /> : <Copy aria-hidden="true" />}
+            <span>{copyState === 'copied' ? copy.linkCopied : copy.copyLink}</span>
+          </button>
+          <span className={styles.liveRegion} aria-live="polite">{feedback}</span>
+        </section>
+      </dialog>
+    </>
+  );
+}

src/i18n/content.ts

@@ -55,6 +55,15 @@ export interface SiteMessages {
     liveProjectLabel: (title: string) => string;
     drawerLabel: string;
     closeCaseStudy: string;
+    shareLabel: string;
+    shareCaseStudy: string;
+    shareDialogTitle: string;
+    shareDialogDescription: string;
+    closeShareDialog: string;
+    shareTelegram: string;
+    shareWhatsApp: string;
+    shareLinkedIn: string;
+    shareEmail: string;
     copyLink: string;
     linkCopied: string;
     copyFailed: string;
@@ -206,6 +215,15 @@ export const messagesByLocale = {
       liveProjectLabel: (title) => `Open the live ${title} project in a new tab`,
       drawerLabel: 'Project case study',
       closeCaseStudy: 'Close case study',
+      shareLabel: 'Share',
+      shareCaseStudy: 'Share this case study',
+      shareDialogTitle: 'Share case study',
+      shareDialogDescription: 'Send this project to someone or copy its direct link.',
+      closeShareDialog: 'Close sharing options',
+      shareTelegram: 'Telegram',
+      shareWhatsApp: 'WhatsApp',
+      shareLinkedIn: 'LinkedIn',
+      shareEmail: 'Email',
       copyLink: 'Copy link',
       linkCopied: 'Link copied',
       copyFailed: 'Could not copy the link',
@@ -358,6 +376,15 @@ export const messagesByLocale = {
       liveProjectLabel: (title) => `باز کردن نسخه زنده ${title} در زبانه جدید`,
       drawerLabel: 'مطالعه موردی پروژه',
       closeCaseStudy: 'بستن مطالعه موردی',
+      shareLabel: 'اشتراک‌گذاری',
+      shareCaseStudy: 'اشتراک‌گذاری این مطالعه موردی',
+      shareDialogTitle: 'اشتراک‌گذاری مطالعه موردی',
+      shareDialogDescription: 'این پروژه را برای دیگران بفرستید یا پیوند مستقیم آن را کپی کنید.',
+      closeShareDialog: 'بستن گزینه‌های اشتراک‌گذاری',
+      shareTelegram: 'تلگرام',
+      shareWhatsApp: 'واتس‌اپ',
+      shareLinkedIn: 'لینکدین',
+      shareEmail: 'ایمیل',
       copyLink: 'کپی پیوند',
       linkCopied: 'پیوند کپی شد',
       copyFailed: 'کپی پیوند ممکن نشد',