/* ===== CSS Variables ===== */
:root {
    --primary: #28A745;
    --primary-dark: #218838;
    --primary-light: #48c764;
    --secondary: #3f3d56;
    --text-dark: #2f2e41;
    --text-muted: #6c757d;
    --text-light: #f8f9fa;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e9ecef;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

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

ul {
    list-style: none;
}

/* ===== Utility Classes ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

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

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

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

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 17px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ===== Header ===== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    padding: 20px 0;
    transition: var(--transition);
}

#header.scrolled {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    padding: 12px 0;
}

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

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

.logo img {
    height: 35px;
}

.logo-dark {
    display: none;
}

#header.scrolled .logo-light {
    display: none;
}

#header.scrolled .logo-dark {
    display: block;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    font-weight: 500;
    color: var(--text-light);
    padding: 8px 0;
    position: relative;
}

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

.nav-menu a:hover::after {
    width: 100%;
}

#header.scrolled .nav-menu a {
    color: var(--text-dark);
}

.nav-cta {
    padding: 10px 24px;
}

#header.scrolled .nav-cta {
    background-color: var(--primary);
    color: var(--text-light);
}

#header:not(.scrolled) .nav-cta {
    background-color: transparent;
    border: 2px solid var(--text-light);
    color: var(--text-light);
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-light);
    transition: var(--transition);
}

#header.scrolled .mobile-menu-toggle span {
    background: var(--text-dark);
}

/* ===== Hero Section ===== */
#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary) 0%, #1a1a2e 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="%2328A745" stroke-width="0.5" opacity="0.1"/></svg>');
    background-size: 200px;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    padding: 0 20px;
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 18px;
    margin-bottom: 16px;
    animation: fadeInDown 0.8s ease;
}

.hero-title {
    color: var(--text-light);
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 32px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-content .btn {
    animation: fadeInUp 0.8s ease 0.6s both;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-title {
    font-size: clamp(28px, 4vw, 36px);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-description {
    font-size: 17px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== Services Section ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

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

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(40, 167, 69, 0.1);
    border-radius: 12px;
    color: var(--primary);
    margin-bottom: 24px;
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.7;
}

/* ===== Why Us Section ===== */
.why-us-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.why-us-content .section-title {
    text-align: left;
}

.why-us-content .section-description {
    text-align: left;
    margin-bottom: 32px;
}

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: var(--text-muted);
}

.check-icon {
    display: inline-flex;
    color: var(--primary);
    flex-shrink: 0;
}

.why-us-image svg {
    width: 100%;
    height: auto;
}

/* ===== Pricing Section ===== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.pricing-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    position: relative;
}

.pricing-card.featured::before {
    content: 'Popular';
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--primary);
    color: white;
    padding: 4px 40px;
    font-size: 12px;
    font-weight: 600;
    transform: rotate(45deg);
}

.pricing-header {
    padding: 40px 30px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.pricing-card.featured .pricing-header {
    background: var(--primary);
    color: var(--text-light);
}

.pricing-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(40, 167, 69, 0.1);
    border-radius: 50%;
    color: var(--primary);
    margin-bottom: 20px;
}

.pricing-card.featured .pricing-icon {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
}

.pricing-header h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-header p {
    font-size: 14px;
    opacity: 0.8;
}

.pricing-cta {
    padding: 24px 30px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.pricing-cta .btn {
    width: 100%;
}

.pricing-features {
    padding: 30px;
}

.pricing-features h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.pricing-features ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

.pricing-features li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    margin-top: 8px;
    flex-shrink: 0;
}

/* ===== Contact Section ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-title {
    text-align: left;
}

.contact-info .section-description {
    text-align: left;
}

.contact-form-wrapper {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.form-group .required {
    color: #dc3545;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-light);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
}

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

/* ===== Footer ===== */
#footer {
    background: var(--secondary);
    color: var(--text-light);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr;
    gap: 60px;
    padding-bottom: 60px;
}

.footer-about p {
    margin-top: 20px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    line-height: 1.7;
}

.footer-about a {
    color: var(--primary);
}

.footer-about a:hover {
    text-decoration: underline;
}

.footer-links h4,
.footer-newsletter h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 8px;
}

.footer-newsletter p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    margin-bottom: 20px;
}

.newsletter-form input[type="email"] {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    margin-bottom: 12px;
}

.newsletter-form input[type="email"]::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form input[type="email"]:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 16px;
    cursor: pointer;
}

.checkbox-label input {
    margin-top: 3px;
    accent-color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a {
    color: var(--primary);
}

.payment-methods {
    display: flex;
    gap: 12px;
}

.payment-methods img {
    height: 30px;
    width: auto;
    opacity: 0.8;
    transition: var(--transition);
}

.payment-methods img:hover {
    opacity: 1;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ===== Mobile Responsive ===== */
@media (max-width: 992px) {
    .why-us-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .why-us-image {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }

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

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

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .nav-menu,
    .nav-cta {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    #nav.active {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        padding: 20px;
        box-shadow: var(--shadow);
    }

    #nav.active .nav-menu {
        display: flex;
        flex-direction: column;
        gap: 0;
    }

    #nav.active .nav-menu a {
        display: block;
        padding: 12px 0;
        color: var(--text-dark);
        border-bottom: 1px solid var(--border-color);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .footer-bottom-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .hero-content {
        padding: 0 10px;
    }

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

    .pricing-header,
    .pricing-features {
        padding: 24px 20px;
    }
}