:root {
    --bg-color: #0d1117;
    --bg-secondary: #161b22;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    --accent-glow: rgba(88, 166, 255, 0.15);
    --border-color: #30363d;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Outfit', sans-serif;
    --container-padding: 2rem;
    --max-width: 1200px;
    --btn-radius: 4px;
    --card-radius: 12px;
    --transition-speed: 0.3s;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Utilities */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: 5rem 0;
}

.text-center { text-align: center; }

.gradient-text {
    background: linear-gradient(135deg, var(--accent-color), #bc8cff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    font-family: var(--font-body);
}

.logo .accent {
    color: var(--accent-color);
}

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-background {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle at center, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.6;
    z-index: 1;
    pointer-events: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    font-weight: 600;
    border-radius: var(--btn-radius);
    transition: all var(--transition-speed);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #000;
}

.btn-primary:hover {
    background-color: #79c0ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(88, 166, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Services */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: var(--card-radius);
    transition: transform var(--transition-speed), border-color var(--transition-speed);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.service-icon {
    width: 50px;
    height: 50px;
    background: rgba(88, 166, 255, 0.1);
    color: var(--accent-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-family: var(--font-body);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Approach Section */
.approach-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.feature-list {
    margin-top: 2rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: "•";
    color: var(--accent-color);
    font-size: 1.5rem;
    line-height: 1;
    margin-right: 0.8rem;
}

.visual-card {
    width: 100%;
    height: 400px;
    background: linear-gradient(45deg, var(--bg-secondary), #1c2128);
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.visual-card::after {
    content: "";
    position: absolute;
    width: 150%;
    height: 150%;
    background: conic-gradient(from 180deg at 50% 50%, #0d1117 0deg, var(--accent-glow) 180deg, #0d1117 360deg);
    top: -25%;
    left: -25%;
    animation: rotate 10s linear infinite;
    opacity: 0.3;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Contact */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    background: var(--bg-secondary);
    border-radius: var(--card-radius);
    padding: 4rem;
    border: 1px solid var(--border-color);
}

.contact-email {
    display: inline-block;
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-top: 1rem;
    font-weight: 700;
}

.contact-form .form-group {
    margin-bottom: 1.5rem;
}

.contact-form label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--btn-radius);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.full-width { width: 100%; }

/* Footer */
.footer {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    background: var(--bg-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    margin-left: 2rem;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--accent-color);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 768px) {
    .header-container { height: 70px; }
    
    .mobile-nav-toggle { display: block; z-index: 1001;}
    .mobile-nav-toggle.open .bar:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .mobile-nav-toggle.open .bar:nth-child(2) { opacity: 0; }
    .mobile-nav-toggle.open .bar:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg-secondary);
        padding-top: 6rem;
        transition: 0.3s ease-in-out;
        display: flex;
        justify-content: center;
    }

    .nav.open { right: 0; }

    .nav-list {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    .nav-link { font-size: 1.5rem; }

    .approach-container,
    .contact-wrapper {
        grid-template-columns: 1fr;
        padding: 2rem;
    }
}