Sync: toggle de tema com sol/lua e modo automático

index.html

@@ -13,6 +13,11 @@
         <header class="header">
             <h1 class="logo"><span class="logo-mind">MINDAPPS</span><span class="logo-ai">.AI</span></h1>
             <p class="tagline">Laboratório de IA Aplicada</p>
+            <button id="theme-toggle" class="theme-toggle" aria-label="Alternar tema">
+                <span class="theme-icon">☀️</span>
+                <span class="theme-icon">🌙</span>
+                <span class="theme-toggle-knob"></span>
+            </button>
         </header>
 
         <!-- Intro Card -->
@@ -224,5 +229,42 @@
             </p>
         </footer>
     </div>
+    <script>
+        (function() {
+            const storageKey = 'theme-preference';
+            const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
+            const toggleBtn = document.getElementById('theme-toggle');
+
+            function applyTheme(mode) {
+                if (mode === 'auto') {
+                    document.body.setAttribute('data-theme', mediaQuery.matches ? 'dark' : 'light');
+                } else {
+                    document.body.setAttribute('data-theme', mode);
+                }
+            }
+
+            function init() {
+                let saved = localStorage.getItem(storageKey);
+                const initial = saved ? saved : (mediaQuery.matches ? 'dark' : 'light');
+                applyTheme(initial);
+
+                mediaQuery.addEventListener('change', () => {
+                    const savedPref = localStorage.getItem(storageKey);
+                    if (!savedPref) {
+                        applyTheme(mediaQuery.matches ? 'dark' : 'light');
+                    }
+                });
+
+                toggleBtn.addEventListener('click', () => {
+                    const current = document.body.getAttribute('data-theme') || (mediaQuery.matches ? 'dark' : 'light');
+                    const next = current === 'dark' ? 'light' : 'dark';
+                    localStorage.setItem(storageKey, next);
+                    applyTheme(next);
+                });
+            }
+
+            init();
+        })();
+    </script>
 </body>
-</html>
+</html>

style.css

@@ -1,4 +1,20 @@
 /* Reset and Base Styles */
+:root {
+    --bg: #f9fafb;
+    --text: #1f2937;
+    --card-bg: #ffffff;
+    --card-border: #e5e7eb;
+    --muted: #6b7280;
+    --accent: #ffbe00;
+}
+
+[data-theme="dark"] {
+    --bg: #0b0b0b;
+    --text: #e5e7eb;
+    --card-bg: #111827;
+    --card-border: #1f2937;
+    --muted: #9ca3af;
+}
 * {
     margin: 0;
     padding: 0;
@@ -8,8 +24,8 @@
 body {
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Arial", sans-serif;
     line-height: 1.6;
-    color: #1f2937;
-    background: #f9fafb;
+    color: var(--text);
+    background: var(--bg);
     padding: 0;
 }
 
@@ -26,6 +42,7 @@ body {
     padding: 2rem 0;
     background: #000;
     margin: -2rem -1rem 2rem -1rem;
+    position: relative;
 }
 
 .logo {
@@ -40,11 +57,11 @@ body {
 }
 
 .logo-ai {
-    color: #ffbe00;
+    color: var(--accent);
 }
 
 .tagline {
-    color: #9ca3af;
+    color: var(--muted);
     font-size: 0.875rem;
     text-transform: uppercase;
     letter-spacing: 0.15em;
@@ -53,8 +70,8 @@ body {
 
 /* Cards */
 .card {
-    background: white;
-    border: 1px solid #e5e7eb;
+    background: var(--card-bg);
+    border: 1px solid var(--card-border);
     border-radius: 12px;
     padding: 1.5rem;
     margin-bottom: 2rem;
@@ -68,11 +85,11 @@ body {
 .intro-card h2 {
     font-size: 1.5rem;
     margin-bottom: 1rem;
-    color: #111827;
+    color: var(--text);
 }
 
 .intro-card p {
-    color: #4b5563;
+    color: var(--muted);
     font-size: 1rem;
     margin-bottom: 0.75rem;
 }
@@ -99,7 +116,7 @@ body {
 }
 
 .btn-primary {
-    background: #ffbe00;
+    background: var(--accent);
     color: #000;
 }
 
@@ -128,8 +145,8 @@ body {
 }
 
 .stat-item {
-    background: white;
-    border: 1px solid #e5e7eb;
+    background: var(--card-bg);
+    border: 1px solid var(--card-border);
     border-radius: 8px;
     padding: 1.5rem;
     text-align: center;
@@ -145,7 +162,7 @@ body {
 .stat-label {
     display: block;
     font-size: 0.875rem;
-    color: #6b7280;
+    color: var(--muted);
     text-transform: uppercase;
     letter-spacing: 0.05em;
     margin-top: 0.25rem;
@@ -160,9 +177,9 @@ body {
     font-size: 1.25rem;
     font-weight: 700;
     margin-bottom: 1rem;
-    color: #111827;
+    color: var(--text);
     padding-bottom: 0.5rem;
-    border-bottom: 2px solid #ffbe00;
+    border-bottom: 2px solid var(--accent);
 }
 
 .apps-grid {
@@ -173,8 +190,8 @@ body {
 }
 
 .app-card {
-    background: white;
-    border: 1px solid #e5e7eb;
+    background: var(--card-bg);
+    border: 1px solid var(--card-border);
     border-radius: 8px;
     padding: 1.25rem;
     transition: all 0.3s;
@@ -189,18 +206,18 @@ body {
 .app-card h3 {
     font-size: 1rem;
     margin-bottom: 0.5rem;
-    color: #111827;
+    color: var(--text);
 }
 
 .app-card p {
-    color: #6b7280;
+    color: var(--muted);
     font-size: 0.875rem;
     margin-bottom: 1rem;
 }
 
 .app-link {
     display: inline-block;
-    color: #ffbe00;
+    color: var(--accent);
     text-decoration: none;
     font-weight: 600;
     font-size: 0.875rem;
@@ -224,7 +241,7 @@ body {
 
 .newsletter-list li {
     padding: 0.5rem 0;
-    color: #4b5563;
+    color: var(--muted);
     font-size: 0.9375rem;
 }
 
@@ -245,7 +262,7 @@ body {
 
 .achievements-list li {
     padding: 0.375rem 0;
-    color: #4b5563;
+    color: var(--muted);
     font-size: 0.9375rem;
 }
 
@@ -254,11 +271,11 @@ body {
     text-align: center;
     padding: 2rem 0 1rem 0;
     margin-top: 3rem;
-    border-top: 1px solid #e5e7eb;
+    border-top: 1px solid var(--card-border);
 }
 
 .footer p {
-    color: #6b7280;
+    color: var(--muted);
     font-size: 0.875rem;
     margin-bottom: 0.5rem;
 }
@@ -268,7 +285,7 @@ body {
 }
 
 .footer-links a {
-    color: #4b5563;
+    color: var(--text);
     text-decoration: none;
     font-weight: 500;
     transition: color 0.2s;
@@ -278,6 +295,70 @@ body {
     color: #ffbe00;
 }
 
+.theme-toggle-btn {
+    position: absolute;
+    top: 12px;
+    right: 12px;
+    width: 32px;
+    height: 32px;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    border-radius: 9999px;
+    background: #111;
+    border: 1px solid #333;
+    color: #fff;
+    font-size: 16px;
+    cursor: pointer;
+    opacity: 0.85;
+    transition: opacity 0.2s, transform 0.2s;
+}
+
+.theme-toggle-btn:hover {
+    opacity: 1;
+    transform: translateY(-1px);
+}
+
+.theme-toggle {
+    position: absolute;
+    top: 12px;
+    right: 12px;
+    width: 56px;
+    height: 28px;
+    display: inline-flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 0 6px;
+    border-radius: 9999px;
+    background: #111;
+    border: 1px solid #333;
+    color: #fff;
+    cursor: pointer;
+    opacity: 0.9;
+}
+
+.theme-icon {
+    font-size: 14px;
+    line-height: 1;
+    user-select: none;
+}
+
+.theme-toggle-knob {
+    position: absolute;
+    top: 2px;
+    left: 2px;
+    width: 24px;
+    height: 24px;
+    border-radius: 9999px;
+    background: var(--accent);
+    box-shadow: 0 1px 3px rgba(0,0,0,0.5);
+    transition: left 0.2s ease;
+}
+
+body[data-theme="dark"] .theme-toggle-knob {
+    left: 30px;
+}
+
 /* Responsive */
 @media (max-width: 768px) {
     .container {
@@ -326,4 +407,4 @@ body {
     .stat-number {
         font-size: 1.5rem;
     }
-}
+}