feat(ui): global redesign, unified layout and personalized feed

- introduce global design system via CSS variables
- modern green-based color palette with improved readability
- unify Feed, Explore and Profile visual language
- add discovery posts visual highlight via border (no text shift)
- improve card depth, shadows and container consistency
- stabilize personalized feed logic (subscriptions + discovery)
- prepare UI for future theming without TSX changes

frontend/app/components/PostCard/PostCard.tsx

@@ -1,242 +1,119 @@
 'use client';
 
-import { useState, useEffect } from 'react';
+import { useRef } from 'react';
-import CommentModal from '../CommentModal/CommentModal';
 
-type Comment = {
+export type PostCardData = {
   id: number;
-  author: string;
+  petName: string;
+  petType: 'Hund' | 'Katze';
+  authorName: string;
+  createdAt: string;
   text: string;
-};
+  likesCount: number;
-
+  commentsCount: number;
-type Media = {
+  
-  type: 'image' | 'video';
-  url: string;
-  aspect: '1:1' | '9:16';
 };
 
 type PostCardProps = {
-  petName: string;
+  post: PostCardData;
-  petType: 'Hund' | 'Katze';
+  isDiscovery?: boolean
-  ownerName?: string;
+  onOpenPreview: (post: PostCardData) => void;
-  text: string;
+  onCommentClick?: (post: PostCardData) => void;
-  createdAt: string;
+  
-  media?: Media;
+
-  likes: number;
-  likedByCurrentUser?: boolean;
-  commentsCount: number;
-  commentsList: Comment[];
 };
 
-// 🔐 Simulierter eingeloggter User
-const CURRENT_USER_ID = 1;
-
 export default function PostCard({
-  petName,
+  post,
-  petType,
+  onOpenPreview,
-  ownerName,
+  onCommentClick,
-  text,
+  isDiscovery,
-  createdAt,
-  media,
-  likes,
-  likedByCurrentUser,
-  commentsCount,
-  commentsList,
 }: PostCardProps) {
-  const [showComments, setShowComments] = useState(false);
+  const likeRef = useRef<HTMLButtonElement | null>(null);
-  const [showMediaFullscreen, setShowMediaFullscreen] = useState(false);
+  const commentRef = useRef<HTMLButtonElement | null>(null);
 
-  const [localLikes, setLocalLikes] = useState(likes);
+  function animate(
-  const [liked, setLiked] = useState(!!likedByCurrentUser);
+    ref: React.RefObject<HTMLButtonElement>,
-
+    animation: string
-  const isSquare = media?.aspect === '1:1';
+  ) {
-
+    if (!ref.current) return;
-  // ⛔ Scroll sperren bei Vollbild
+    const el = ref.current;
-  useEffect(() => {
+    el.style.animation = animation;
-    if (showMediaFullscreen) {
+    el.addEventListener(
-      document.body.style.overflow = 'hidden';
+      'animationend',
-    } else {
+      () => {
-      document.body.style.overflow = '';
+        el.style.animation = '';
-    }
+      },
-  }, [showMediaFullscreen]);
+      { once: true }
+    );
+  }
 
   return (
-    <>
+    <article
-      <article
+  className={`postcard ${
-        style={{
+    isDiscovery ? 'postcard--discovery' : ''
-          border: '1px solid #e5e5e5',
+  }`}
-          borderRadius: '16px',
+>
-          backgroundColor: 'white',
+
-          overflow: 'hidden',
+      {/* Klickbarer Bereich → Preview */}
-        }}
+      <div
+        className="postcard-main"
+        onClick={() => onOpenPreview(post)}
       >
-        {/* HEADER */}
+        <div className="postcard-media" />
-        <header style={{ padding: '1rem', display: 'grid', gap: '0.2rem' }}>
-          <div style={{ fontWeight: 800, fontSize: '1.1rem' }}>
-            {petName}{' '}
-            <span style={{ fontWeight: 500, color: '#666' }}>
-              ({petType})
-            </span>
-          </div>
 
-          <div style={{ fontSize: '0.8rem', color: '#777' }}>
+        <div className="postcard-content">
-            {createdAt}
+          <div className="postcard-header">
-            {ownerName && (
+  {isDiscovery && (
-              <>
+    <div className="post-discovery-wrapper">
-                {' · '}
+      
-                <span style={{ fontStyle: 'italic' }}>
+    </div>
-                  verwaltet von {ownerName}
+  )}
-                </span>
-              </>
-            )}
-          </div>
-        </header>
 
-        {/* MEDIA */}
+  <div className="postcard-title-row">
-        {media && (
+    <strong className="postcard-title">
-          <div
+      {post.petName}
-            onClick={() => setShowMediaFullscreen(true)}
+    </strong>
-            style={{
+    <span className="postcard-meta">
-              width: '100%',
+      · {post.petType} · {post.authorName} · {post.createdAt}
-              aspectRatio: isSquare ? '1 / 1' : '9 / 16',
+    </span>
-              backgroundColor: '#000',
+  </div>
-              cursor: 'pointer',
+</div>
-            }}
-          >
-            {media.type === 'image' && (
-              <img
-                src={media.url}
-                alt={petName}
-                style={{
-                  width: '100%',
-                  height: '100%',
-                  objectFit: 'cover',
-                }}
-              />
-            )}
 
-            {media.type === 'video' && (
+          <p className="postcard-text">{post.text}</p>
-              <video
-                src={media.url}
-                muted
-                style={{
-                  width: '100%',
-                  height: '100%',
-                  objectFit: 'cover',
-                }}
-              />
-            )}
-          </div>
-        )}
-
-        {/* TEXT */}
-        <div style={{ padding: '1rem', fontSize: '0.95rem' }}>
-          {text}
         </div>
+      </div>
 
-        {/* FOOTER */}
+      {/* Interaktionen */}
-        <footer
+      <div className="postcard-actions">
-          style={{
+        <button
-            padding: '0 1rem 1rem',
+          ref={likeRef}
-            display: 'flex',
+          type="button"
-            gap: '1.2rem',
+          className="postcard-action"
-            fontSize: '0.85rem',
+          onClick={(e) => {
+            e.stopPropagation();
+            animate(likeRef, 'heart-pop 0.3s ease');
+            // später: Like-Logik
           }}
         >
-          <button
+          <span aria-hidden>❤️</span>
-            type="button"
+          <span>{post.likesCount}</span>
-            onClick={() => {
+        </button>
-              setLiked(!liked);
-              setLocalLikes((prev) => (liked ? prev - 1 : prev + 1));
 
-              console.log('LIKE', {
+        <button
-                byUser: CURRENT_USER_ID,
+          ref={commentRef}
-                pet: petName,
+          type="button"
-              });
+          className="postcard-action"
-            }}
+          onClick={(e) => {
-            style={{
+            e.stopPropagation();
-              background: 'none',
+            animate(commentRef, 'comment-wiggle 0.25s ease');
-              border: 'none',
+            onCommentClick?.(post);
-              cursor: 'pointer',
-              fontWeight: 600,
-              color: liked ? '#d32f2f' : '#555',
-            }}
-          >
-            ❤️ {localLikes}
-          </button>
-
-          <button
-            type="button"
-            onClick={() => setShowComments(true)}
-            style={{
-              background: 'none',
-              border: 'none',
-              cursor: 'pointer',
-              fontWeight: 600,
-              color: '#2E7D32',
-            }}
-          >
-            💬 {commentsCount} Kommentare
-          </button>
-        </footer>
-      </article>
-
-      {/* 💬 Kommentare */}
-      {showComments && (
-        <CommentModal
-          comments={commentsList}
-          onClose={() => setShowComments(false)}
-        />
-      )}
-
-      {/* 🖼️ MEDIA FULLSCREEN */}
-      {showMediaFullscreen && media && (
-        <div
-          onClick={() => setShowMediaFullscreen(false)}
-          style={{
-            position: 'fixed',
-            inset: 0,
-            backgroundColor: 'rgba(0,0,0,0.9)',
-            display: 'flex',
-            alignItems: 'center',
-            justifyContent: 'center',
-            zIndex: 2000,
-            cursor: 'zoom-out',
           }}
         >
-          <div
+          <span aria-hidden>💬</span>
-            onClick={(e) => e.stopPropagation()}
+          <span>{post.commentsCount}</span>
-            style={{
+        </button>
-              maxWidth: '95vw',
+      </div>
-              maxHeight: '95vh',
+    </article>
-            }}
-          >
-            {media.type === 'image' && (
-              <img
-                src={media.url}
-                alt={petName}
-                style={{
-                  maxWidth: '100%',
-                  maxHeight: '100%',
-                  objectFit: 'contain',
-                }}
-              />
-            )}
-
-            {media.type === 'video' && (
-              <video
-                src={media.url}
-                controls
-                autoPlay
-                style={{
-                  maxWidth: '100%',
-                  maxHeight: '100%',
-                }}
-              />
-            )}
-          </div>
-        </div>
-      )}
-    </>
   );
 }

frontend/app/explore/page.tsx

@@ -1,26 +1,15 @@
 'use client';
 
 import { useRef, useState } from 'react';
+import PostCard, {
+  PostCardData,
+} from '@/app/components/PostCard/PostCard';
 
-type ExplorePet = {
+/* =======================
-  id: number;
+   MOCK DATA
-  name: string;
+======================= */
-  type: 'Hund' | 'Katze';
-};
 
-type ExplorePost = {
+const trendingPets = [
-  id: number;
-  petId: number;
-  petName: string;
-  petType: 'Hund' | 'Katze';
-  authorName: string;
-  createdAt: string;
-  text: string;
-  likesCount: number;
-  commentsCount: number;
-};
-
-const trendingPets: ExplorePet[] = [
   { id: 1, name: 'Luna', type: 'Katze' },
   { id: 2, name: 'Bello', type: 'Hund' },
   { id: 3, name: 'Milo', type: 'Katze' },
@@ -29,10 +18,9 @@ const trendingPets: ExplorePet[] = [
   { id: 6, name: 'Leo', type: 'Hund' },
 ];
 
-const latestPosts: ExplorePost[] = [
+const latestPosts: PostCardData[] = [
   {
     id: 101,
-    petId: 1,
     petName: 'Luna',
     petType: 'Katze',
     authorName: 'Anna',
@@ -43,7 +31,6 @@ const latestPosts: ExplorePost[] = [
   },
   {
     id: 102,
-    petId: 2,
     petName: 'Bello',
     petType: 'Hund',
     authorName: 'Markus',
@@ -54,7 +41,6 @@ const latestPosts: ExplorePost[] = [
   },
   {
     id: 103,
-    petId: 3,
     petName: 'Milo',
     petType: 'Katze',
     authorName: 'Sophie',
@@ -65,7 +51,6 @@ const latestPosts: ExplorePost[] = [
   },
   {
     id: 104,
-    petId: 4,
     petName: 'Rocky',
     petType: 'Hund',
     authorName: 'Timo',
@@ -76,15 +61,20 @@ const latestPosts: ExplorePost[] = [
   },
 ];
 
+/* =======================
+   PAGE
+======================= */
+
 export default function ExplorePage() {
-  const [activeFilter, setActiveFilter] = useState<
+  const [activeFilter, setActiveFilter] =
-    'ALLE' | 'HUND' | 'KATZE'
+    useState<'ALLE' | 'HUND' | 'KATZE'>('ALLE');
-  >('ALLE');
 
-  const [previewPost, setPreviewPost] = useState<ExplorePost | null>(null);
+  const [previewPost, setPreviewPost] =
-const [openComments, setOpenComments] = useState(false);
+    useState<PostCardData | null>(null);
 
-  // Swipe-Down Handling fürs Modal
+  const [openComments, setOpenComments] = useState(false);
+
+  // Swipe-Down fürs Modal
   const startY = useRef<number | null>(null);
 
   const filteredPosts = latestPosts.filter((p) => {
@@ -96,90 +86,46 @@ const [openComments, setOpenComments] = useState(false);
   return (
     <>
       {/* ================= HEADER / FILTER ================= */}
-      <section
+      <section className="explore-header">
-        style={{
-          padding: '1rem',
-          display: 'grid',
-          gap: '1rem',
-          maxWidth: '720px',
-          margin: '0 auto',
-        }}
-      >
         <header>
-          <h1 style={{ marginBottom: '0.3rem' }}>Entdecken</h1>
+          <h1>Entdecken</h1>
-          <p style={{ margin: 0, color: '#666' }}>
+          <p>Neue Tiere, Trends & besondere Momente</p>
-            Neue Tiere, Trends & besondere Momente
-          </p>
         </header>
 
-        <div style={{ display: 'flex', gap: '0.5rem' }}>
+        <div className="explore-filter">
           {[
             { key: 'ALLE', label: 'Alle' },
             { key: 'HUND', label: 'Hunde' },
             { key: 'KATZE', label: 'Katzen' },
-          ].map((f) => {
+          ].map((f) => (
-            const active = activeFilter === f.key;
+            <button
-            return (
+              key={f.key}
-              <button
+              className={
-                key={f.key}
+                activeFilter === f.key
-                onClick={() =>
+                  ? 'filter-button active'
-                  setActiveFilter(f.key as 'ALLE' | 'HUND' | 'KATZE')
+                  : 'filter-button'
-                }
+              }
-                style={{
+              onClick={() =>
-                  padding: '0.45rem 0.9rem',
+                setActiveFilter(f.key as 'ALLE' | 'HUND' | 'KATZE')
-                  borderRadius: '999px',
+              }
-                  border: active ? 'none' : '1px solid #ccc',
+            >
-                  backgroundColor: active ? '#2E7D32' : 'white',
+              {f.label}
-                  color: active ? 'white' : 'inherit',
+            </button>
-                  fontSize: '0.75rem',
+          ))}
-                  fontWeight: active ? 600 : 400,
-                  cursor: 'pointer',
-                  transform: active ? 'scale(1.05)' : 'scale(1)',
-                  transition:
-                    'background-color 0.2s ease, transform 0.15s ease',
-                }}
-              >
-                {f.label}
-              </button>
-            );
-          })}
         </div>
       </section>
 
       {/* ================= BELIEBTE TIERE ================= */}
-      <section style={{ paddingLeft: '1rem', marginBottom: '1.5rem' }}>
+      <section className="explore-trending">
-        <strong style={{ display: 'block', marginBottom: '0.6rem' }}>
+        <strong>Beliebte Tiere</strong>
-          Beliebte Tiere
-        </strong>
 
-        <div
+        <div className="trending-scroll hide-scrollbar">
-          className="hide-scrollbar"
-          style={{
-            display: 'flex',
-            gap: '0.8rem',
-            overflowX: 'auto',
-            WebkitOverflowScrolling: 'touch',
-          }}
-        >
           {trendingPets.map((pet) => (
-            <div key={pet.id} style={{ width: '84px', flex: '0 0 auto' }}>
+            <div key={pet.id} className="trending-item">
-              <div
+              <div className="trending-avatar">🐾</div>
-                style={{
+              <div className="trending-meta">
-                  width: '84px',
-                  height: '84px',
-                  borderRadius: '18px',
-                  backgroundColor: '#f2f2f2',
-                  display: 'flex',
-                  alignItems: 'center',
-                  justifyContent: 'center',
-                  fontSize: '1.4rem',
-                }}
-              >
-                🐾
-              </div>
-              <div style={{ marginTop: '0.4rem', fontSize: '0.72rem' }}>
                 <strong>{pet.name}</strong>
-                <div style={{ color: '#777' }}>{pet.type}</div>
+                <span>{pet.type}</span>
               </div>
             </div>
           ))}
@@ -187,151 +133,23 @@ const [openComments, setOpenComments] = useState(false);
       </section>
 
       {/* ================= POSTS ================= */}
-      <section
+      <section className="explore-posts">
-        style={{
+        <strong>Neueste Beiträge</strong>
-          padding: '0 1rem 1rem',
-          maxWidth: '720px',
-          margin: '0 auto',
-        }}
-      >
-        <strong style={{ display: 'block', marginBottom: '0.6rem' }}>
-          Neueste Beiträge
-        </strong>
 
-        <div style={{ display: 'flex', flexDirection: 'column', gap: '0.9rem' }}>
+        <div className="post-list">
           {filteredPosts.map((post) => (
-            <article
+            <PostCard
               key={post.id}
-              style={{
+              post={post}
-                border: '1px solid #eee',
+              onOpenPreview={(p) => {
-                borderRadius: '18px',
+                setOpenComments(false);
-                overflow: 'hidden',
+                setPreviewPost(p);
-                backgroundColor: 'white',
               }}
-            >
+              onCommentClick={(p) => {
-              {/* ✅ Nur dieser Bereich öffnet das Modal */}
+                setOpenComments(true);
-              <div
+                setPreviewPost(p);
-                onClick={() => setPreviewPost(post)}
+              }}
-                style={{ cursor: 'pointer' }}
+            />
-              >
-                <div
-                  style={{
-                    width: '100%',
-                    aspectRatio: '3 / 2',
-                    backgroundColor: '#eaeaea',
-                  }}
-                />
-
-                <div style={{ padding: '0.8rem', display: 'grid', gap: '0.35rem' }}>
-                  <div
-                    style={{
-                      display: 'flex',
-                      justifyContent: 'space-between',
-                      gap: '0.6rem',
-                    }}
-                  >
-                    <div>
-                      <strong>{post.petName}</strong>{' '}
-                      <span style={{ color: '#777', fontSize: '0.8rem' }}>
-                        · {post.petType} · {post.authorName}
-                      </span>
-                    </div>
-                    <span
-                      style={{
-                        color: '#777',
-                        fontSize: '0.8rem',
-                        whiteSpace: 'nowrap',
-                      }}
-                    >
-                      {post.createdAt}
-                    </span>
-                  </div>
-
-                  <p style={{ margin: 0, fontSize: '0.9rem' }}>{post.text}</p>
-                </div>
-              </div>
-
-              {/* ✅ Interaktionszeile (öffnet KEIN Modal) */}
-              <div
-                style={{
-                  padding: '0 0.8rem 0.8rem',
-                  display: 'flex',
-                  gap: '1rem',
-                  fontSize: '0.85rem',
-                  color: '#555',
-                }}
-              >
-                <button
-  type="button"
-  onClick={(e) => {
-    e.stopPropagation();
-
-    const el = e.currentTarget;
-    el.style.animation = 'heart-pop 0.3s ease';
-    el.addEventListener(
-      'animationend',
-      () => {
-        el.style.animation = '';
-      },
-      { once: true }
-    );
-
-    console.log('LIKE CLICK', post.id);
-  }}
-  style={{
-    border: 'none',
-    background: 'transparent',
-    padding: 0,
-    cursor: 'pointer',
-    display: 'flex',
-    gap: '0.35rem',
-    alignItems: 'center',
-    color: 'inherit',
-  }}
->
-  <span aria-hidden>❤️</span>
-  <span>{post.likesCount}</span>
-</button>
-
-
-                <button
-  type="button"
-  onClick={(e) => {
-    e.stopPropagation();
-
-    // Animation
-    const el = e.currentTarget;
-    el.style.animation = 'comment-wiggle 0.25s ease';
-    el.addEventListener(
-      'animationend',
-      () => {
-        el.style.animation = '';
-      },
-      { once: true }
-    );
-
-    // 👉 LOGIK
-    setOpenComments(true);
-    setPreviewPost(post);
-  }}
-  style={{
-    border: 'none',
-    background: 'transparent',
-    padding: 0,
-    cursor: 'pointer',
-    display: 'flex',
-    gap: '0.35rem',
-    alignItems: 'center',
-    color: 'inherit',
-  }}
->
-  <span aria-hidden>💬</span>
-  <span>{post.commentsCount}</span>
-</button>
-
-
-              </div>
-            </article>
           ))}
         </div>
       </section>
@@ -339,127 +157,63 @@ const [openComments, setOpenComments] = useState(false);
       {/* ================= PREVIEW MODAL ================= */}
       {previewPost && (
         <div
-          onClick={() => setPreviewPost(null)}
+          className="post-preview-overlay"
-          style={{
+          onClick={() => {
-            position: 'fixed',
+            setPreviewPost(null);
-            inset: 0,
+            setOpenComments(false);
-            backgroundColor: 'rgba(0,0,0,0.4)',
-            zIndex: 50,
-            display: 'flex',
-            justifyContent: 'center',
-            alignItems: 'flex-end',
           }}
         >
           <div
+            className="post-preview-modal"
             onClick={(e) => e.stopPropagation()}
-            onTouchStart={(e) => (startY.current = e.touches[0].clientY)}
+            onTouchStart={(e) =>
+              (startY.current = e.touches[0].clientY)
+            }
             onTouchEnd={(e) => {
               if (
                 startY.current &&
                 e.changedTouches[0].clientY - startY.current > 80
               ) {
                 setPreviewPost(null);
-setOpenComments(false);
+                setOpenComments(false);
-
               }
             }}
-            style={{
-              backgroundColor: 'white',
-              width: '100%',
-              maxWidth: '720px',
-              borderTopLeftRadius: '22px',
-              borderTopRightRadius: '22px',
-              padding: '1rem',
-              animation: 'slideUp 0.25s ease',
-              paddingBottom: '5rem',
-
-            }}
           >
-            <div
+            <div className="modal-handle" />
-              style={{
-                width: '36px',
-                height: '4px',
-                borderRadius: '999px',
-                backgroundColor: '#ccc',
-                margin: '0 auto 0.8rem',
-              }}
-            />
 
-            <div
+            <div className="modal-media" />
-              style={{
-                width: '100%',
-                aspectRatio: '3 / 2',
-                backgroundColor: '#eaeaea',
-                borderRadius: '14px',
-                marginBottom: '0.8rem',
-              }}
-            />
 
             <strong>{previewPost.petName}</strong>{' '}
-            <span style={{ color: '#777', fontSize: '0.85rem' }}>
+            <span className="modal-meta">
               · {previewPost.petType} · {previewPost.authorName}
             </span>
 
-            <p style={{ marginTop: '0.6rem' }}>{previewPost.text}</p>
+            <p className="modal-text">{previewPost.text}</p>
-{openComments && (
-  <div
-    style={{
-      marginTop: '1rem',
-      paddingTop: '0.8rem',
-      borderTop: '1px solid #eee',
-    }}
-  >
-    <strong style={{ fontSize: '0.9rem' }}>Kommentare</strong>
 
-    <div
+            <div className="modal-stats">
-      style={{
+              <span>❤️ {previewPost.likesCount}</span>
-        marginTop: '0.6rem',
+              <span>💬 {previewPost.commentsCount}</span>
-        fontSize: '0.85rem',
+            </div>
-        color: '#666',
-      }}
-    >
-      Noch keine Kommentare.
-    </div>
 
-    <input
+            {openComments && (
-      placeholder="Kommentar schreiben…"
+              <div className="modal-comments">
-      style={{
+                <strong>Kommentare</strong>
-        marginTop: '0.6rem',
+                <p className="modal-comment-empty">
-        width: '100%',
+                  Noch keine Kommentare.
-        padding: '0.6rem 0.8rem',
+                </p>
-        borderRadius: '999px',
-        border: '1px solid #ccc',
-        fontSize: '0.85rem',
-      }}
-      autoFocus
-    />
-  </div>
-)}
 
-            <div
+                <input
-              style={{
+                  className="modal-comment-input"
-                display: 'flex',
+                  placeholder="Kommentar schreiben…"
-                justifyContent: 'space-between',
+                  autoFocus
-                alignItems: 'center',
+                />
-                marginTop: '1rem',
-              }}
-            >
-              <div style={{ fontSize: '0.9rem', color: '#555', display: 'flex', gap: '1rem' }}>
-                <span>❤️ {previewPost.likesCount}</span>
-                <span>💬 {previewPost.commentsCount}</span>
               </div>
+            )}
 
+            <div className="modal-actions">
               <a
                 href={`/post/${previewPost.id}`}
-                style={{
+                className="modal-open-post"
-                  padding: '0.5rem 0.9rem',
-                  borderRadius: '999px',
-                  backgroundColor: '#2E7D32',
-                  color: 'white',
-                  textDecoration: 'none',
-                  fontSize: '0.85rem',
-                  fontWeight: 600,
-                }}
               >
                 Zum Beitrag
               </a>

frontend/app/feed/page.tsx

@@ -1,179 +1,237 @@
 'use client';
 
-import { useState } from 'react';
+import { useRef, useState } from 'react';
-import PostCard from '../components/PostCard/PostCard';
+import PostCard, {
-import FreshPostsSlider from '../components/FreshPostsSlider/FreshPostsSlider';
+  PostCardData,
+} from '@/app/components/PostCard/PostCard';
 
-/* ---------------- TYPES ---------------- */
+/* =======================
+   MOCK: USER KONTEXT
+======================= */
 
-type Comment = {
+const myPets = [
-  id: number;
-  author: string;
-  text: string;
-};
-
-type Media = {
-  type: 'image' | 'video';
-  url: string;
-  aspect: '1:1' | '9:16';
-};
-
-type FeedPost = {
-  id: number;
-
-  // 🐾 Tier (Absender)
-  petId: number;
-  petName: string;
-  petType: 'Hund' | 'Katze';
-
-  // 👤 Admin (sekundär)
-  ownerId: number;
-  ownerName: string;
-
-  // 📝 Inhalt
-  text: string;
-  createdAt: string;
-
-  // 📸 / 🎥 Media
-  media?: Media;
-
-  // ❤️ Interaktion
-  likes: number;
-  //likedByCurrentUser: number; // ✅ FEHLTE
-  commentsCount: number;
-  commentsList: Comment[];
-};
-
-type FeedAdmin = {
-  id: number;
-  name: string;
-  avatar: string;
-};
-
-/* ---------------- MOCK ADMINS ---------------- */
-
-const mockAdmins: FeedAdmin[] = [
   {
     id: 1,
-    name: 'Anna',
+    petType: 'Katze',
-    avatar: 'https://i.pravatar.cc/100?img=12',
+    breed: 'Bengal',
-  },
+    ageMonths: 24,
-  {
-    id: 2,
-    name: 'Markus',
-    avatar: 'https://i.pravatar.cc/100?img=32',
   },
 ];
 
-/* ---------------- MOCK POSTS ---------------- */
+const followedPetIds = [1, 3, 5];
 
-const mockPosts: FeedPost[] = [
+/* =======================
+   MOCK: POSTS
+======================= */
+
+type FeedPost = PostCardData & {
+  petId: number;
+  breed: string;
+  ageMonths: number;
+};
+
+const allPosts: FeedPost[] = [
   {
-    id: 1,
+    id: 401,
     petId: 1,
     petName: 'Luna',
     petType: 'Katze',
-
+    breed: 'Bengal',
-    ownerId: 1,
+    ageMonths: 26,
-    ownerName: 'Anna',
+    authorName: 'Anna',
-
+    createdAt: 'vor 10 Minuten',
-    text: 'Luna genießt die Sonne auf dem Balkon ☀️',
+    text: 'Luna liebt den neuen Kratzbaum.',
-    createdAt: 'vor 2 Stunden',
+    likesCount: 8,
-
-    media: {
-      type: 'image',
-      url: 'https://placekitten.com/600/600',
-      aspect: '1:1',
-    },
-
-    likes: 12,
     commentsCount: 2,
-    commentsList: [
-      { id: 1, author: 'Lisa', text: 'Wie süß 😍' },
-      { id: 2, author: 'Tom', text: 'Typisch Katze!' },
-    ],
   },
   {
-    id: 2,
+    id: 402,
     petId: 2,
-    petName: 'Bello',
+    petName: 'Rocky',
     petType: 'Hund',
-
+    breed: 'Labrador',
-    ownerId: 2,
+    ageMonths: 30,
-    ownerName: 'Markus',
+    authorName: 'Tim',
-
+    createdAt: 'vor 1 Stunde',
-    text: 'Spaziergang im Park – jemand hatte sehr viel Energie 🐕',
+    text: 'Rocky war schwimmen 🐕‍🦺',
-    createdAt: 'heute Morgen',
+    likesCount: 15,
-
+    commentsCount: 4,
-    media: {
+  },
-      type: 'video',
+  {
-      url: 'https://www.w3schools.com/html/mov_bbb.mp4',
+    id: 403,
-      aspect: '9:16',
+    petId: 3,
-    },
+    petName: 'Milo',
-
+    petType: 'Katze',
-    likes: 20,
+    breed: 'Bengal',
-    
+    ageMonths: 22,
-
+    authorName: 'Sophie',
-    commentsCount: 0,
+    createdAt: 'heute',
-    commentsList: [],
+    text: 'Milo entdeckt den Balkon.',
+    likesCount: 11,
+    commentsCount: 3,
+  },
+  {
+    id: 404,
+    petId: 4,
+    petName: 'Nala',
+    petType: 'Katze',
+    breed: 'Maine Coon',
+    ageMonths: 40,
+    authorName: 'Laura',
+    createdAt: 'gestern',
+    text: 'Nala beobachtet alles ganz ruhig.',
+    likesCount: 6,
+    commentsCount: 1,
   },
 ];
 
-/* ---------------- PAGE ---------------- */
+/* =======================
+   RELEVANZ LOGIK
+======================= */
+
+function relevanceScore(post: FeedPost) {
+  let score = 0;
+
+  myPets.forEach((pet) => {
+    if (post.petType === pet.petType) score += 3;
+    if (post.breed === pet.breed) score += 5;
+    if (Math.abs(post.ageMonths - pet.ageMonths) <= 6) score += 2;
+  });
+
+  score += Math.min(post.likesCount / 10, 3);
+  score += Math.min(post.commentsCount / 5, 2);
+
+  return score;
+}
+
+/* =======================
+   PAGE
+======================= */
 
 export default function FeedPage() {
-  const [selectedOwnerId, setSelectedOwnerId] = useState<number | null>(null);
+  const [previewPost, setPreviewPost] =
+    useState<PostCardData | null>(null);
+  const [openComments, setOpenComments] = useState(false);
 
-  const visiblePosts = selectedOwnerId
+  const startY = useRef<number | null>(null);
-    ? mockPosts.filter((post) => post.ownerId === selectedOwnerId)
+
-    : mockPosts;
+  /* =======================
+     FEED ZUSAMMENSTELLEN
+  ======================= */
+
+  const subscribedPosts = allPosts.filter((post) =>
+    followedPetIds.includes(post.petId)
+  );
+
+  const discoveryPosts = allPosts
+    .filter((post) => !followedPetIds.includes(post.petId))
+    .sort((a, b) => relevanceScore(b) - relevanceScore(a));
+
+  const FEED_SIZE = 20;
+  const DISCOVERY_RATIO = 0.15;
+
+  const discoveryCount = Math.max(
+    1,
+    Math.round(FEED_SIZE * DISCOVERY_RATIO)
+  );
+
+  const finalFeed = [
+    ...subscribedPosts
+      .slice(0, FEED_SIZE - discoveryCount)
+      .map((p) => ({ ...p, isDiscovery: false })),
+
+    ...discoveryPosts
+      .slice(0, discoveryCount)
+      .map((p) => ({ ...p, isDiscovery: true })),
+  ];
 
   return (
-    <section
+    <>
-      style={{
+      {/* ================= HEADER ================= */}
-        maxWidth: '600px',
+      <section className="feed-header">
-        margin: '0 auto',
+        <header>
-        display: 'grid',
+          <h1>Feed</h1>
-        gap: '1.5rem',
+          <p>Beiträge deiner Tiere & Abos</p>
-      }}
+        </header>
-    >
-      {/* HEADER */}
-      <header>
-        <h1 style={{ marginBottom: '0.3rem' }}>Feed</h1>
-        <p style={{ margin: 0, color: '#555' }}>
-          Neueste Beiträge aus der OnlyPets-Community
-        </p>
-      </header>
-
-      {/* 🔄 Frische Tier-Admins Slider */}
-      <FreshPostsSlider
-        users={mockAdmins}
-        onSelectUser={setSelectedOwnerId}
-      />
-
-      {/* 📰 FEED */}
-      <section style={{ display: 'grid', gap: '1.5rem' }}>
-        {visiblePosts.length === 0 && (
-          <p style={{ color: '#777' }}>
-            Keine Beiträge von diesen Tier-Admins.
-          </p>
-        )}
-
-        {visiblePosts.map((post) => (
-          <PostCard
-            key={post.id}
-            petName={post.petName}
-            petType={post.petType}
-            ownerName={post.ownerName}
-            text={post.text}
-            createdAt={post.createdAt}
-            media={post.media}
-            likes={post.likes}
-            commentsCount={post.commentsCount}
-            commentsList={post.commentsList}
-          />
-        ))}
       </section>
-    </section>
+
+      {/* ================= POSTS ================= */}
+      <section className="feed-posts">
+        <div className="post-list">
+          {finalFeed.map((post) => (
+            <PostCard
+              key={post.id}
+              post={post}
+              isDiscovery={post.isDiscovery}
+              onOpenPreview={(p) => {
+                setOpenComments(false);
+                setPreviewPost(p);
+              }}
+              onCommentClick={(p) => {
+                setOpenComments(true);
+                setPreviewPost(p);
+              }}
+            />
+          ))}
+        </div>
+      </section>
+
+      {/* ================= PREVIEW MODAL ================= */}
+      {previewPost && (
+        <div
+          className="post-preview-overlay"
+          onClick={() => {
+            setPreviewPost(null);
+            setOpenComments(false);
+          }}
+        >
+          <div
+            className="post-preview-modal"
+            onClick={(e) => e.stopPropagation()}
+            onTouchStart={(e) =>
+              (startY.current = e.touches[0].clientY)
+            }
+            onTouchEnd={(e) => {
+              if (
+                startY.current &&
+                e.changedTouches[0].clientY - startY.current > 80
+              ) {
+                setPreviewPost(null);
+                setOpenComments(false);
+              }
+            }}
+          >
+            <div className="modal-handle" />
+            <div className="modal-media" />
+
+            <strong>{previewPost.petName}</strong>{' '}
+            <span className="modal-meta">
+              · {previewPost.petType} · {previewPost.authorName}
+            </span>
+
+            <p className="modal-text">{previewPost.text}</p>
+
+            <div className="modal-stats">
+              <span>❤️ {previewPost.likesCount}</span>
+              <span>💬 {previewPost.commentsCount}</span>
+            </div>
+
+            {openComments && (
+              <div className="modal-comments">
+                <strong>Kommentare</strong>
+                <p className="modal-comment-empty">
+                  Noch keine Kommentare.
+                </p>
+                <input
+                  className="modal-comment-input"
+                  placeholder="Kommentar schreiben…"
+                  autoFocus
+                />
+              </div>
+            )}
+          </div>
+        </div>
+      )}
+    </>
   );
 }

frontend/app/globals.css

@@ -1,16 +1,49 @@
 @import "tailwindcss";
 
+* {
+  box-sizing: border-box;
+}
 :root {
-  --background: #ffffff;
+  /* ===== COLORS ===== */
-  --foreground: #171717;
+  --color-primary: #2e7d32;
+  --color-primary-soft: #e6efe9;
+
+  --color-bg: #f6faf7;
+  --color-surface: #ffffff;
+
+  --color-text-main: #1f2d24;
+  --color-text-secondary: #5f6f66;
+  --color-text-muted: #8a9b92;
+
+  --color-border: rgba(0, 0, 0, 0.06);
+
+  /* ===== SHADOWS ===== */
+  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.05);
+  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
+  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
+
+  /* ===== RADIUS ===== */
+  --radius-sm: 10px;
+  --radius-md: 14px;
+  --radius-lg: 18px;
+
+  /* ===== SPACING ===== */
+  --space-xs: 0.25rem;
+  --space-sm: 0.5rem;
+  --space-md: 1rem;
+  --space-lg: 1.5rem;
+  --space-xl: 2rem;
+}
+html, body {
+  background: var(--color-bg);
+  color: var(--color-text-main);
+  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
+  line-height: 1.5;
 }
 
-@theme inline {
+
-  --color-background: var(--background);
+
-  --color-foreground: var(--foreground);
+
-  --font-sans: var(--font-geist-sans);
-  --font-mono: var(--font-geist-mono);
-}
 
 @media (prefers-color-scheme: dark) {
   :root {
@@ -96,4 +129,154 @@ body {
     transform: translateY(0);
   }
 }
+.postcard {
+  background: var(--color-surface);
+  border-radius: var(--radius-lg);
+  border: 1px solid var(--color-border);
+  box-shadow: var(--shadow-sm);
+  padding: var(--space-md);
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-sm);
+  transition: box-shadow 0.2s ease, transform 0.2s ease;
+}
 
+.postcard:hover {
+  box-shadow: var(--shadow-md);
+  transform: translateY(-1px);
+}
+.postcard {
+  background: var(--color-surface);
+  border-radius: var(--radius-lg);
+  border: 1px solid var(--color-border);
+  box-shadow: var(--shadow-sm);
+  padding: var(--space-md);
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-sm);
+  transition: box-shadow 0.2s ease, transform 0.2s ease;
+}
+
+.postcard:hover {
+  box-shadow: var(--shadow-md);
+  transform: translateY(-1px);
+}
+.postcard-content {
+  font-size: 0.95rem;
+  color: var(--color-text-secondary);
+}
+.postcard-actions {
+  display: flex;
+  gap: var(--space-md);
+  align-items: center;
+  font-size: 0.85rem;
+  color: var(--color-text-muted);
+}
+
+.postcard-action {
+  display: flex;
+  align-items: center;
+  gap: 0.3rem;
+  cursor: pointer;
+  user-select: none;
+}
+
+.postcard-action:hover {
+  color: var(--color-text-main);
+}
+.postcard--discovery {
+  border: 1px solid var(--color-primary);
+  box-shadow:
+    0 0 0 1px rgba(46, 125, 50, 0.15),
+    var(--shadow-sm);
+}
+.feed-header,
+.explore-header {
+  padding: var(--space-lg) var(--space-md) var(--space-md);
+}
+
+.feed-header p,
+.explore-header p {
+  color: var(--color-text-secondary);
+  margin: 0.25rem 0 0;
+}
+.post-list {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-md);
+  padding: 0 var(--space-md) var(--space-xl);
+}
+.fresh-scroll,
+.trending-scroll {
+  display: flex;
+  gap: var(--space-sm);
+  overflow-x: auto;
+  padding: var(--space-sm) var(--space-md);
+}
+
+.hide-scrollbar {
+  scrollbar-width: none;
+}
+
+.hide-scrollbar::-webkit-scrollbar {
+  display: none;
+}
+.fresh-item,
+.trending-item {
+  background: var(--color-surface);
+  border-radius: var(--radius-md);
+  padding: var(--space-sm);
+  min-width: 80px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 0.3rem;
+  box-shadow: var(--shadow-sm);
+  border: 1px solid var(--color-border);
+}
+.profile-header {
+  display: flex;
+  gap: var(--space-lg);
+  padding: var(--space-lg);
+  background: var(--color-surface);
+  border-radius: var(--radius-lg);
+  border: 1px solid var(--color-border);
+  box-shadow: var(--shadow-sm);
+  margin: var(--space-md);
+}
+.profile-stats {
+  display: flex;
+  gap: var(--space-lg);
+  margin-top: var(--space-sm);
+}
+
+.profile-stats div {
+  text-align: center;
+}
+
+.profile-stats strong {
+  font-size: 1.1rem;
+}
+
+.profile-stats span {
+  font-size: 0.8rem;
+  color: var(--color-text-muted);
+}
+.post-preview-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.35);
+  display: flex;
+  justify-content: center;
+  align-items: flex-end;
+  z-index: 50;
+}
+
+.post-preview-modal {
+  background: var(--color-surface);
+  width: 100%;
+  max-width: 600px;
+  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
+  padding: var(--space-lg);
+  box-shadow: var(--shadow-lg);
+}

frontend/app/profile/page.tsx

@@ -1,3 +1,157 @@
+'use client';
+
+import PostCard, {
+  PostCardData,
+} from '@/app/components/PostCard/PostCard';
+
+/* =======================
+   MOCK: USER
+======================= */
+
+const user = {
+  id: 1,
+  name: 'Laura',
+  username: '@laura_pets',
+  bio: 'Liebt Tiere, Natur & ruhige Momente.',
+  stats: {
+    pets: 2,
+    posts: 6,
+    follows: 18,
+  },
+};
+
+/* =======================
+   MOCK: PETS
+======================= */
+
+const pets = [
+  {
+    id: 1,
+    name: 'Nala',
+    type: 'Katze',
+    breed: 'Maine Coon',
+    age: '3 Jahre',
+  },
+  {
+    id: 2,
+    name: 'Rocky',
+    type: 'Hund',
+    breed: 'Labrador',
+    age: '4 Jahre',
+  },
+];
+
+/* =======================
+   MOCK: POSTS
+======================= */
+
+const posts: PostCardData[] = [
+  {
+    id: 501,
+    petName: 'Nala',
+    petType: 'Katze',
+    authorName: 'Laura',
+    createdAt: 'gestern',
+    text: 'Nala beobachtet alles ganz ruhig.',
+    likesCount: 6,
+    commentsCount: 1,
+  },
+  {
+    id: 502,
+    petName: 'Rocky',
+    petType: 'Hund',
+    authorName: 'Laura',
+    createdAt: 'vor 2 Tagen',
+    text: 'Rocky liebt lange Spaziergänge.',
+    likesCount: 9,
+    commentsCount: 2,
+  },
+];
+
+/* =======================
+   PAGE
+======================= */
+
 export default function ProfilePage() {
-  return <h1>Profil</h1>;
+  return (
+    <>
+      {/* ================= USER HEADER ================= */}
+      <section className="profile-header">
+        <div className="profile-avatar">
+          <span>👤</span>
+        </div>
+
+        <div className="profile-info">
+          <h1>{user.name}</h1>
+          <span className="profile-username">
+            {user.username}
+          </span>
+
+          {user.bio && (
+            <p className="profile-bio">
+              {user.bio}
+            </p>
+          )}
+
+          <div className="profile-stats">
+            <div>
+              <strong>{user.stats.pets}</strong>
+              <span>Tiere</span>
+            </div>
+            <div>
+              <strong>{user.stats.posts}</strong>
+              <span>Beiträge</span>
+            </div>
+            <div>
+              <strong>{user.stats.follows}</strong>
+              <span>Abos</span>
+            </div>
+          </div>
+        </div>
+      </section>
+
+      {/* ================= PETS ================= */}
+      <section className="profile-pets">
+        <h2>Meine Tiere</h2>
+
+        <div className="pets-grid">
+          {pets.map((pet) => (
+            <a
+              key={pet.id}
+              href={`/pets/${pet.id}`}
+              className="pet-card"
+            >
+              <div className="pet-avatar">🐾</div>
+
+              <strong className="pet-name">
+                {pet.name}
+              </strong>
+
+              <span className="pet-meta">
+                {pet.type} · {pet.breed}
+              </span>
+
+              <span className="pet-age">
+                {pet.age}
+              </span>
+            </a>
+          ))}
+        </div>
+      </section>
+
+      {/* ================= POSTS ================= */}
+      <section className="profile-posts">
+        <h2>Beiträge</h2>
+
+        <div className="post-list">
+          {posts.map((post) => (
+            <PostCard
+              key={post.id}
+              post={post}
+            />
+          ))}
+        </div>
+      </section>
+    </>
+  );
 }