:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --secondary: #10B981;
    --bg-primary: #ffffff;
    --bg-secondary: #F1F5F9;
    --bg-tertiary: #E2E8F0;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-tertiary: #94A3B8;
    --card-bg: #ffffff;
    --border-color: #E2E8F0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --modal-overlay: rgba(0, 0, 0, 0.5);
}
[data-theme="dark"] {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --text-primary: #F8FAFC;
    --text-secondary: #E2E8F0;
    --text-tertiary: #CBD5E1;
    --card-bg: #1E293B;
    --border-color: #475569;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --modal-overlay: rgba(0, 0, 0, 0.7);
}
body, .navbar, .service-card, .client-card, .modal-content, 
footer, button, a, input, textarea, select {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}
.navbar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 10002;
}
.navbar a {
    color: var(--text-primary);
}
.navbar a:hover {
    color: var(--primary);
}
.hero-gradient {
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
}
.service-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-color);
}
.service-card:hover {
    box-shadow: 0 10px 15px var(--shadow-color);
}
.service-card h3 {
    color: var(--text-primary);
}
.service-card p {
    color: var(--text-secondary);
}
.btn-primary {
    background-color: var(--primary);
    color: white;
}
.btn-primary:hover {
    background-color: var(--primary-dark);
}
.btn-secondary {
    background-color: var(--secondary);
    color: white;
}
.btn-secondary:hover {
    filter: brightness(90%);
}
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-overlay);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}
.modal-content {
    background-color: var(--bg-primary);
    border-radius: 1rem;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 4px 6px var(--shadow-color);
    z-index: 10000;
}
.modal-content .prose {
    padding: 1.5rem;
}
.modal-content .prose h4 {
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}
.modal-content .prose ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
}
.modal-content .prose li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}
.modal-content .prose strong {
    color: var(--text-primary);
}
.modal-content::-webkit-scrollbar {
    width: 8px;
}
.modal-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}
.modal-content::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}
.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}
.modal-content .flex.justify-between {
    position: sticky;
    top: 0;
    z-index: 1;
    padding: 1rem 1.5rem;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}
.modal-content .mt-8 {
    position: sticky;
    bottom: 0;
    padding: 1rem 1.5rem;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    margin-top: 0;
}
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 10001;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow-color);
}
.theme-toggle:hover {
    transform: scale(1.1);
    background-color: var(--bg-tertiary);
}
.theme-toggle i {
    font-size: 1.2rem;
    color: var(--text-primary);
    transition: transform 0.3s ease;
}
.theme-toggle:hover i {
    transform: rotate(30deg);
}
.scroll-top {
    z-index: 10001;
}
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}
.text-gray-600 {
    color: var(--text-secondary) !important;
}
.text-gray-400 {
    color: var(--text-tertiary) !important;
}
a {
    color: var(--primary);
}
a:hover {
    color: var(--primary-dark);
}
#sobre .bg-white {
    background-color: var(--card-bg) !important;
}
#sobre .text-gray-700 {
    color: var(--text-secondary) !important;
}
#contato .bg-gray-50 {
    background-color: var(--bg-secondary) !important;
}
#contato .text-gray-800 {
    color: var(--text-primary) !important;
}
#contato .border-gray-200 {
    border-color: var(--border-color) !important;
}
.clients-grid {
    perspective: 1000px;
}
.client-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    transition: all 3s ease-in-out;
    position: relative;
    grid-area: var(--grid-area);
}
.client-card[data-position="1"] { --grid-area: 1 / 1 / 2 / 2; }
.client-card[data-position="2"] { --grid-area: 1 / 2 / 2 / 3; }
.client-card[data-position="3"] { --grid-area: 1 / 3 / 2 / 4; }
.client-card[data-position="4"] { --grid-area: 2 / 1 / 3 / 2; }
.client-card[data-position="5"] { --grid-area: 2 / 2 / 3 / 3; }
.client-card[data-position="6"] { --grid-area: 2 / 3 / 3 / 4; }
.client-card[data-position="7"] { --grid-area: 3 / 1 / 4 / 2; }
.client-card[data-position="8"] { --grid-area: 3 / 2 / 4 / 3; }
.client-card[data-position="9"] { --grid-area: 3 / 3 / 4 / 4; }
.client-card img {
    transition: all 0.3s ease;
}
.clientes-marquee {
    animation: marquee 30s linear infinite;
    will-change: transform;
}
@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.clientes-marquee img {
    filter: grayscale(1);
    opacity: 0.7;
    transition: filter 0.3s, opacity 0.3s, transform 0.3s;
}
.clientes-marquee img:hover {
    filter: grayscale(0);
    opacity: 1;
    transform: scale(1.1);
}
@media (max-width: 768px) {
    .clients-grid .grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(5, 1fr);
    }
    .client-card[data-position="1"] { --grid-area: 1 / 1 / 2 / 2; }
    .client-card[data-position="2"] { --grid-area: 1 / 2 / 2 / 3; }
    .client-card[data-position="3"] { --grid-area: 2 / 1 / 3 / 2; }
    .client-card[data-position="4"] { --grid-area: 2 / 2 / 3 / 3; }
    .client-card[data-position="5"] { --grid-area: 3 / 1 / 4 / 2; }
    .client-card[data-position="6"] { --grid-area: 3 / 2 / 4 / 3; }
    .client-card[data-position="7"] { --grid-area: 4 / 1 / 5 / 2; }
    .client-card[data-position="8"] { --grid-area: 4 / 2 / 5 / 3; }
    .client-card[data-position="9"] { --grid-area: 5 / 1 / 6 / 2; }
    .clientes-marquee img {
        height: 2.5rem;
    }
    .clientes-marquee {
        animation-duration: 18s;
    }
}
@media (max-width: 480px) {
    .clients-grid .grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(9, 1fr);
    }
    .client-card[data-position="1"] { --grid-area: 1 / 1 / 2 / 2; }
    .client-card[data-position="2"] { --grid-area: 2 / 1 / 3 / 2; }
    .client-card[data-position="3"] { --grid-area: 3 / 1 / 4 / 2; }
    .client-card[data-position="4"] { --grid-area: 4 / 1 / 5 / 2; }
    .client-card[data-position="5"] { --grid-area: 5 / 1 / 6 / 2; }
    .client-card[data-position="6"] { --grid-area: 6 / 1 / 7 / 2; }
    .client-card[data-position="7"] { --grid-area: 7 / 1 / 8 / 2; }
    .client-card[data-position="8"] { --grid-area: 8 / 1 / 9 / 2; }
    .client-card[data-position="9"] { --grid-area: 9 / 1 / 10 / 2; }
    .clientes-marquee img {
        height: 2rem;
    }
    .clientes-marquee {
        animation-duration: 12s;
    }
}

/* --- Portfolio Styles --- */
#portfolio {
    background-color: var(--bg-secondary);
}

#portfolio h1 {
    color: var(--text-primary);
}

.portfolio-filter-btn {
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--card-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.portfolio-filter-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.portfolio-filter-btn.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.3);
}

.portfolio-card {
    position: relative;
    overflow: hidden;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: all 0.4s ease;
    background-color: var(--card-bg);
}

.portfolio-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 20px var(--shadow-color);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.portfolio-card:hover .portfolio-img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0) 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    color: white;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3,
.portfolio-overlay p {
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

.portfolio-card:hover .portfolio-overlay h3,
.portfolio-card:hover .portfolio-overlay p {
    transform: translateY(0);
}

.portfolio-overlay p {
    transition-delay: 0.1s;
}

.portfolio-link {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    text-decoration: none;
    transform: scale(0);
    transition: transform 0.3s ease 0.2s, background-color 0.3s;
}

.portfolio-card:hover .portfolio-link {
    transform: scale(1);
}

.portfolio-link:hover {
    background-color: white;
    color: var(--primary-dark);
}