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

:root {
    --color-dark-blue: #0d2b4a;
    --color-light-blue: #e3f2fd;
    --color-green: #4caf50;
    --color-green-hover: #66bb6a;
    --color-white: #ffffff;
    --color-gray: #666666;
    --color-gray-light: #999999;
    --color-overlay: rgba(0, 0, 0, 0.5);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark-blue);
    overflow-x: hidden;
}

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

/* Header */
.header {
    background-color: var(--color-light-blue);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: baseline;
    text-decoration: none;
    font-size: 1.75rem;
}

.logo-ng {
    color: #1a4a7a;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo-packet {
    color: #2196f3;
    font-weight: 400;
    font-size: 0.85em;
    margin-left: 0.05em;
}

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

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

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

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

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

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

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

.btn-primary:hover {
    background-color: #1a3a5f;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 43, 74, 0.3);
}

.btn-cta {
    background-color: var(--color-green);
    color: var(--color-white);
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-cta:hover {
    background-color: var(--color-green-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.btn-secondary {
    background-color: var(--color-gray-light);
    color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-gray);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-dark-blue) 0%, #1a3a5f 100%);
    margin-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 8H17V6C17 4.9 16.1 4 15 4H9C7.9 4 7 4.9 7 6V8H4C2.9 8 2 8.9 2 10V19C2 20.1 2.9 21 4 21H20C21.1 21 22 20.1 22 19V10C22 8.9 21.1 8 20 8Z' fill='white'/%3E%3C/svg%3E");
    background-size: 400px 400px;
    background-repeat: repeat;
    animation: float 20s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    50% {
        transform: translateY(-20px) translateX(20px);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 4rem 0;
    animation: fadeInUp 1s ease-out;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hero-title-main {
    color: var(--color-white);
}

.hero-title-accent {
    color: var(--color-green);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-white);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.hero-phone {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-white);
    text-decoration: none;
    font-size: 1.75rem;
    font-weight: 600;
    padding: 1rem 2rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    transition: var(--transition);
}

.hero-phone:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-phone .phone-icon {
    flex-shrink: 0;
}

/* Features Section */
.features {
    background-color: var(--color-white);
    padding: 5rem 0;
    border-radius: 40px 40px 0 0;
    margin-top: -40px;
    position: relative;
    z-index: 2;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.feature-card {
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.animate {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark-blue);
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--color-gray);
    line-height: 1.7;
}

/* Footer */
.footer {
    background-color: var(--color-dark-blue);
    color: var(--color-white);
    padding: 3rem 0 2rem;
}

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

.footer-logo {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
}

.footer-logo .logo-ng {
    color: var(--color-white);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.footer-logo .logo-packet {
    color: #64b5f6;
    font-weight: 400;
    font-size: 0.85em;
    margin-left: 0.05em;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.9;
    transition: var(--transition);
}

.footer-link:hover {
    opacity: 1;
    color: var(--color-green);
}

.footer-copyright {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-overlay);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal {
    background-color: var(--color-white);
    border-radius: 16px;
    padding: 2.5rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--color-gray);
    cursor: pointer;
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background-color: var(--color-light-blue);
    color: var(--color-dark-blue);
}

.modal-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-dark-blue);
    margin-bottom: 1.5rem;
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--color-dark-blue);
}

.form-group input,
.form-group textarea {
    padding: 0.75rem;
    border: 2px solid var(--color-light-blue);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

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

.error-message {
    color: #e74c3c;
    font-size: 0.875rem;
    min-height: 1.25rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.form-actions .btn {
    flex: 1;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .nav.active {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-light-blue);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        padding: 1rem 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
        padding: 0 20px;
    }

    .nav-list li {
        padding: 0.75rem 0;
        border-bottom: 1px solid rgba(13, 43, 74, 0.1);
    }

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

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

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

    .btn-call {
        display: none;
    }

    .hero {
        min-height: 80vh;
        margin-top: 70px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .features {
        padding: 3rem 0;
        border-radius: 30px 30px 0 0;
        margin-top: -30px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .feature-card {
        padding: 2rem;
    }

    .footer-nav {
        flex-direction: column;
        gap: 1rem;
    }

    .modal {
        padding: 2rem 1.5rem;
    }

    .form-actions {
        flex-direction: column;
    }
}

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

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

    .btn-cta {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .hero-phone {
        font-size: 1.25rem;
        padding: 0.875rem 1.5rem;
    }

    .logo-text {
        font-size: 1.25rem;
    }
}