:root {
    /* Colors - Light Mode */
    --primary: #2563EB;
    /* Trust Blue */
    --primary-dark: #1E40AF;
    --secondary: #64748B;
    --background: #FFFFFF;
    --surface: #F8FAFC;
    --surface-hover: #F1F5F9;
    --text-main: #0F172A;
    --text-muted: #475569;
    --border: #E2E8F0;
    --accent: #0EA5E9;

    /* Spacing */
    --container-padding: 2rem;
    --max-width: 1200px;
    --header-height: 80px;

    /* Transitions */
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    /* Colors - Dark Mode */
    --primary: #3B82F6;
    --primary-dark: #60A5FA;
    --secondary: #94A3B8;
    --background: #0F172A;
    --surface: #1E293B;
    --surface-hover: #334155;
    --text-main: #F8FAFC;
    --text-muted: #CBD5E1;
    --border: #334155;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

/* 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;
}

.text-primary {
    color: var(--primary);
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

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

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

.gap-4 {
    gap: 2rem;
}

.grid {
    display: grid;
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.btn-outline {
    border: 2px solid var(--border);
    background: transparent;
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}

[data-theme="dark"] .navbar {
    background-color: rgba(15, 23, 42, 0.9);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

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

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

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-muted);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-main);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding-top: calc(var(--header-height) + 4rem);
    padding-bottom: 4rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
    margin: 0 auto;
    text-align: center;
}

.hero-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.hero-image {
    position: absolute;
    right: -5%;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    z-index: 1;
    opacity: 0.8;
    pointer-events: none;
}

/* Trust Badges */
.trust-badges {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
    opacity: 0.7;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Services */
.card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.card-icon {
    width: 64px;
    height: 64px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

/* Portfolio grid */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.portfolio-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 4/3;
    background-color: var(--surface);
    border: 1px solid var(--border);
    group: hover;
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
    transform: translateY(0);
}

/* Trust Section */
.trust-section {
    background-color: var(--surface);
    position: relative;
    overflow: hidden;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: start;
    gap: 1rem;
}

.check-icon {
    color: var(--primary);
    font-size: 1.25rem;
    margin-top: 0.2rem;
}

/* Contact Form */
.form-container {
    background-color: var(--background);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border);
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--surface);
    color: var(--text-main);
    font-family: inherit;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Footer */
.footer {
    background-color: var(--surface);
    padding-top: 4rem;
    padding-bottom: 2rem;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-image {
        display: none;
    }

    .hero {
        text-align: center;
        justify-content: center;
    }

    .hero-content {
        margin: 0 auto;
    }

    .trust-badges {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1.5rem;
        --header-height: 70px;
    }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--background);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .mobile-menu-btn {
        display: block;
    }

    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }
}