add achievements

src/style.css

@@ -1454,6 +1454,163 @@ footer p {
     transform: translateY(0);
 }
 
+/* Achievements Section */
+.achievements-section {
+    background: var(--bg-secondary);
+    border-top: 1px solid var(--border);
+    border-bottom: 1px solid var(--border);
+}
+
+.achievements-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
+    gap: 1rem;
+    max-width: 1200px;
+    margin: 0 auto;
+}
+
+.achievement-card {
+    background: var(--bg-card);
+    border: 1px solid var(--border);
+    border-radius: 12px;
+    padding: 1.25rem;
+    display: flex;
+    align-items: flex-start;
+    gap: 1rem;
+    transition: all 0.3s ease;
+}
+
+.achievement-card.locked {
+    opacity: 0.4;
+}
+
+.achievement-card.unlocked {
+    border-color: rgba(234, 179, 8, 0.3);
+    box-shadow: 0 0 20px rgba(234, 179, 8, 0.08);
+}
+
+.achievement-icon {
+    width: 40px;
+    height: 40px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background: var(--accent-glow);
+    border: 1px solid rgba(234, 179, 8, 0.2);
+    border-radius: 10px;
+    font-size: 1.2rem;
+    flex-shrink: 0;
+}
+
+.achievement-card.locked .achievement-icon {
+    filter: grayscale(1);
+    opacity: 0.5;
+}
+
+.achievement-info h3 {
+    font-size: 0.9rem;
+    font-weight: 700;
+    margin-bottom: 0.25rem;
+}
+
+.achievement-info p {
+    color: var(--text-muted);
+    font-size: 0.8rem;
+    line-height: 1.4;
+}
+
+.achievement-card.locked .achievement-info h3 {
+    color: var(--text-muted);
+}
+
+.achievement-card.locked .achievement-info p {
+    color: var(--text-muted);
+    opacity: 0.5;
+}
+
+/* Toast Notification */
+.toast-container {
+    position: fixed;
+    top: 80px;
+    right: 20px;
+    z-index: 1000;
+    display: flex;
+    flex-direction: column;
+    gap: 0.75rem;
+    pointer-events: none;
+}
+
+.toast {
+    background: var(--bg-card);
+    border: 1px solid var(--accent);
+    border-radius: 12px;
+    padding: 1rem 1.25rem;
+    display: flex;
+    align-items: center;
+    gap: 0.75rem;
+    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4), 0 0 20px var(--accent-glow);
+    pointer-events: auto;
+    animation: toastIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
+    max-width: 340px;
+}
+
+.toast.removing {
+    animation: toastOut 0.3s ease forwards;
+}
+
+.toast-icon {
+    width: 36px;
+    height: 36px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background: var(--accent-glow);
+    border: 1px solid rgba(234, 179, 8, 0.3);
+    border-radius: 8px;
+    font-size: 1.1rem;
+    flex-shrink: 0;
+}
+
+.toast-content {
+    flex: 1;
+}
+
+.toast-label {
+    font-size: 0.65rem;
+    text-transform: uppercase;
+    letter-spacing: 0.1em;
+    color: var(--accent);
+    font-weight: 600;
+    margin-bottom: 0.15rem;
+}
+
+.toast-title {
+    font-size: 0.9rem;
+    font-weight: 700;
+}
+
+@keyframes toastIn {
+    from {
+        opacity: 0;
+        transform: translateX(100px) scale(0.9);
+    }
+    to {
+        opacity: 1;
+        transform: translateX(0) scale(1);
+    }
+}
+
+@keyframes toastOut {
+    from {
+        opacity: 1;
+        transform: translateX(0) scale(1);
+    }
+    to {
+        opacity: 0;
+        transform: translateX(100px) scale(0.9);
+    }
+}
+
 /* Responsive */
 @media (max-width: 768px) {
     .nav-links {