/* ===================================
   Global Styles & Variables
   =================================== */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --text-dark: #1e293b;
    --text-light: #475569;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   Typography
   =================================== */

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

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ===================================
   Navigation
   =================================== */

.navbar {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo:hover {
    color: var(--primary-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: white;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Features Section
   =================================== */

.features {
    padding: 5rem 0;
    background-color: var(--bg-white);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

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

.feature-card {
    padding: 2rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.feature-icon {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

/* ===================================
   CTA Section
   =================================== */

.cta {
    background-color: var(--bg-light);
    padding: 4rem 0;
    text-align: center;
}

.cta h2 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.cta p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

.cta-alt {
    background-color: var(--bg-white);
    padding: 4rem 0;
    text-align: center;
}

.cta-alt h2 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.cta-alt p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

/* ===================================
   Page Header
   =================================== */

.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.page-header h1 {
    color: white;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ===================================
   Services Detail Page
   =================================== */

.services-detail {
    padding: 4rem 0;
}

.service-item {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.service-item:last-child {
    border-bottom: none;
}

.service-item h2 {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.service-features {
    list-style: none;
    margin-top: 1.5rem;
}

.service-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.service-features li:before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ===================================
   About Page
   =================================== */

.about-content {
    padding: 4rem 0;
}

.about-section {
    margin-bottom: 3rem;
}

.about-section h2 {
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.approach-item {
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.approach-item h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.benefits-list,
.tech-list {
    list-style: none;
    margin-top: 1rem;
}

.benefits-list li,
.tech-list li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.benefits-list li:before,
.tech-list li:before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.benefits-list strong {
    color: var(--text-dark);
}

/* ===================================
   Contact Page
   =================================== */

.contact-section {
    padding: 4rem 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.contact-methods {
    margin-top: 2rem;
}

.contact-method {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.contact-method svg {
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-method h3 {
    color: var(--text-dark);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.contact-method p {
    margin: 0;
}

.contact-availability {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: 0.5rem;
}

.contact-availability h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

/* ===================================
   Contact Form
   =================================== */

.contact-form-wrapper {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 0.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
}

.contact-form button {
    width: 100%;
    border: none;
}

.form-note {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

/* ===================================
   Footer
   =================================== */

footer {
    background-color: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 0.5rem 0;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        padding: 4rem 0;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}