/* ===================================
   RESET & GENERAL STYLES
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #007BFF;
    --primary-dark: #0056b3;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===================================
   HEADER & NAVIGATION
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    padding: 10px 0;
    box-shadow: var(--shadow-lg);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    color: var(--white);
    padding: 180px 0 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 20px;
    font-weight: 300;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
    transform: translateY(-2px);
}

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

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

.btn-block {
    width: 100%;
}

/* ===================================
   SECTIONS
   =================================== */
.services,
.portfolio,
.about,
.contact {
    padding: 100px 0;
}

.services {
    background: var(--white);
}

.portfolio {
    background: var(--bg-light);
}

.about {
    background: var(--white);
}

.contact {
    background: var(--bg-light);
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--text-dark);
}

/* ===================================
   SERVICES SECTION
   =================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.service-description {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

/* ===================================
   PORTFOLIO SECTION
   =================================== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.portfolio-item {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 123, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-link {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
}

.portfolio-info {
    padding: 25px;
}

.portfolio-info h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.portfolio-info p {
    color: var(--text-light);
    font-size: 14px;
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about-intro {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 60px;
    line-height: 1.8;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
    max-width: 800px;
    margin: 0 auto;
}

.team-card {
    background: var(--bg-light);
    padding: 50px 30px;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.team-avatar {
    width: 100px;
    height: 100px;
    background: var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.team-name {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.team-role {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 15px;
}

.team-description {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form-container {
    position: relative;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 15px;
    transition: var(--transition);
}

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

.form-group textarea {
    resize: vertical;
}

.form-success {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    box-shadow: var(--shadow);
}

.form-success.show {
    display: flex;
}

.form-success svg {
    color: #28a745;
    margin-bottom: 20px;
}

.form-success p {
    font-size: 18px;
    color: var(--text-dark);
    font-weight: 500;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-info h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

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

.contact-item a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--primary-color);
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.footer-nav {
    display: flex;
    gap: 25px;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-nav a:hover {
    color: var(--white);
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* ===================================
   ANIMATIONS
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    /* Navigation */
    .mobile-menu-btn {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        gap: 15px;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
    }

    /* Hero */
    .hero {
        padding: 140px 0 80px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .btn {
        text-align: center;
    }

    /* Sections */
    .services,
    .portfolio,
    .about,
    .contact {
        padding: 60px 0;
    }

    .section-title {
        font-size: 32px;
        margin-bottom: 40px;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* Portfolio */
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    /* Team */
    .team-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* Contact */
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: 25px;
        text-align: center;
    }

    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }

    .section-title {
        font-size: 28px;
    }

    .contact-form {
        padding: 30px 20px;
    }
}