/* --- Variables & Reset --- */
:root {
    --bg-main: #f1f5f9;         /* Premium cool light gray background */
    --bg-card: #ffffff;         /* Pure white cards */
    --bg-accent: #e2e8f0;       /* Subtle border/accent gray */
    --text-main: #0f172a;       /* Deep slate for primary text */
    --text-muted: #475569;      /* Crisp gray for secondary text */
    --accent-blue: #2563eb;
    --accent-purple: #7c3aed;
    --gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --transition: all 0.3s ease;
    --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
    --card-shadow-hover: 0 20px 35px -5px rgba(15, 23, 42, 0.1), 0 10px 15px -5px rgba(15, 23, 42, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Typography & Buttons --- */
h1, h2, h3 { font-weight: 700; line-height: 1.2; color: #0f172a; }
h2 { font-size: 2.5rem; margin-bottom: 1rem; }
a { text-decoration: none; color: var(--text-main); }

.cta-btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.primary-btn {
    background: var(--gradient);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.25);
}

.primary-btn:hover {
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
    color: #ffffff;
}

.secondary-btn {
    background: transparent;
    border: 2px solid var(--accent-blue);
    color: var(--accent-blue);
}

.secondary-btn:hover {
    background: rgba(37, 99, 235, 0.05);
}

/* --- Navigation --- */
header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    z-index: 1000;
    transition: var(--transition);
}

header.scrolled {
    background: rgba(241, 245, 249, 0.9);
    padding: 1rem 5%;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--bg-accent);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.5px; }
.logo span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links { list-style: none; display: flex; gap: 2rem; }
.nav-links a { font-weight: 500; font-size: 0.95ln; font-size: 0.95rem; transition: var(--transition); }
.nav-links a:hover { color: var(--accent-blue); }

.nav-cta {
    background: var(--bg-card);
    border: 1px solid var(--bg-accent);
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
    color: var(--text-main);
}
.nav-cta:hover { border-color: var(--accent-blue); color: var(--accent-blue); }

.menu-toggle { display: none; font-size: 1.5rem; cursor: pointer; }

/* --- Hero Section --- */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 100vh;
    padding: 8rem 5% 4rem;
    max-width: 1200px;
    margin: 0 auto;
    gap: 4rem;
}
.hero-content { flex: 1; }
.hero-content h1 { font-size: 4rem; margin-bottom: 1.5rem; letter-spacing: -1px; }
.hero-content h1 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-content p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 500px;
}
.hero-buttons { display: flex; gap: 1rem; }
.hero-image { flex: 1; position: relative; }
.hero-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--card-shadow-hover);
    border: 1px solid var(--bg-accent);
}

/* --- Services Section --- */
.services { padding: 6rem 5%; max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-header p { color: var(--text-muted); font-size: 1.1rem; margin-top: 0.5rem; }

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.service-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--bg-accent);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover);
    border-color: #cbd5e1;
}
.service-card i {
    font-size: 2.5rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
}
.service-card h3 { margin-bottom: 1rem; font-size: 1.3rem; }
.service-card p { color: var(--text-muted); font-size: 0.95rem; }

/* --- Portfolio Section --- */
.portfolio { 
    padding: 6rem 5%; 
    background: #e9eff5; /* Slightly alternate contrast block for section separation */
    border-top: 1px solid var(--bg-accent); 
    border-bottom: 1px solid var(--bg-accent); 
}
.portfolio > .section-header { max-width: 1200px; margin: 0 auto 4rem; }

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
.portfolio-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--bg-accent);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.portfolio-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-3px); }
.portfolio-img { width: 100%; height: 220px; overflow: hidden; }
.portfolio-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.portfolio-card:hover .portfolio-img img { transform: scale(1.05); }
.portfolio-info { padding: 2rem; }
.portfolio-info h3 { margin-bottom: 0.5rem; }
.portfolio-info p { color: var(--text-muted); font-size: 0.9rem; }

/* --- Contact Section --- */
.contact { padding: 6rem 5%; max-width: 1200px; margin: 0 auto; }
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    background: var(--bg-card);
    padding: 4rem;
    border-radius: 12px;
    border: 1px solid var(--bg-accent);
    box-shadow: var(--card-shadow);
}
.contact-text h2 { font-size: 2.2rem; margin-bottom: 1rem; }
.contact-text p { color: var(--text-muted); margin-bottom: 2rem; }
.contact-details p { margin-bottom: 1rem; display: flex; align-items: center; gap: 10px; font-weight: 500; }
.contact-details i { color: var(--accent-blue); }

.contact-form { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-form input, .contact-form select, .contact-form textarea {
    width: 100%;
    padding: 1rem;
    background: var(--bg-main);
    border: 1px solid var(--bg-accent);
    color: var(--text-main);
    border-radius: 6px;
    outline: none;
    transition: var(--transition);
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
    border-color: var(--accent-blue);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.submit-btn { width: 100%; padding: 1rem; font-size: 1rem; }

/* --- Footer --- */
footer {
    padding: 2rem 5%;
    background: var(--bg-main);
    border-top: 1px solid var(--bg-accent);
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.social-links { display: flex; gap: 1.5rem; }
.social-links a { color: var(--text-muted); font-size: 1.2rem; transition: var(--transition); }
.social-links a:hover { color: var(--accent-blue); }

/* --- Responsive Design --- */
@media (max-width: 992px) {
    .hero { flex-direction: column; text-align: center; padding-top: 10rem; }
    .hero-content p { margin: 0 auto 2.5rem; }
    .hero-buttons { justify-content: center; }
    .contact-container { grid-template-columns: 1fr; padding: 2rem; }
}

@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .menu-toggle { display: block; color: var(--text-main); }
    .hero-content h1 { font-size: 2.8rem; }
    .nav-links.active {
        display: flex; flex-direction: column; position: absolute;
        top: 100%; left: 0; width: 100%; background: var(--bg-card);
        padding: 2rem; text-align: center; border-bottom: 1px solid var(--bg-accent);
        box-shadow: var(--card-shadow);
    }
}