/* CSS Variables */
:root {
    --primary: #1a56db;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --text: #111827;
    --text-light: #4b5563;
    --bg: #ffffff;
    --bg-alt: #f9fafb;
    --border: #e5e7eb;
    --accent: #0ea5e9;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.75rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

p {
    color: var(--text-light);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.btn-large {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    z-index: 100;
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 130px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 112px;
    width: auto;
}

.nav {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-light);
}

.nav-links a:hover {
    color: var(--text);
}

.nav-links .btn {
    padding: 10px 20px;
}

.nav-links .btn-primary {
    color: white;
}

.nav-links .btn-primary:hover {
    color: white;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s ease;
}

/* Hero */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.hero-inner {
    max-width: 720px;
}

.hero h1 {
    margin-bottom: 1.5rem;
    color: var(--text);
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

/* About */
.about {
    padding: 100px 0;
}

.about-content {
    max-width: 720px;
}

.about-content p {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* Services */
.services {
    padding: 100px 0;
    background: var(--bg-alt);
}

.services h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-alt);
    border-radius: 12px;
    margin-bottom: 1.25rem;
    color: var(--primary);
}

.service-card h3 {
    color: var(--text);
}

.service-card p {
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* Why Section */
.why {
    padding: 100px 0;
}

.why h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.why-card {
    display: flex;
    gap: 16px;
}

.why-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-alt);
    border-radius: 10px;
    color: var(--primary);
}

.why-card h3 {
    color: var(--text);
    margin-bottom: 0.375rem;
}

.why-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Contact */
.contact {
    padding: 100px 0;
    background: var(--bg-alt);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    max-width: 960px;
    margin: 0 auto;
}

.contact-info h2 {
    margin-bottom: 0.5rem;
}

.contact-subtitle {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

.contact-info > p {
    margin-bottom: 2rem;
}

.contact-location {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.9375rem;
}

.contact-location svg {
    color: var(--primary);
}

/* Form */
.contact-form {
    background: var(--bg);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group input.error,
.form-group textarea.error {
    border-color: #ef4444;
}

.error-message {
    font-size: 0.8125rem;
    color: #ef4444;
    margin-top: 6px;
}

/* Footer */
.footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
}

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

.footer p {
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 1024px) {
    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        background: var(--bg);
        padding: 32px 24px;
        gap: 24px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }

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

    .nav-links a {
        font-size: 1.125rem;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 120px 0 80px;
    }

    h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .about,
    .services,
    .why,
    .contact {
        padding: 80px 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .why-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-form {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    .btn-large {
        width: 100%;
    }

    .service-card {
        padding: 24px;
    }
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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