/* ===== Variables ===== */
:root {
    /* Blue Palette */
    --primary-blue: #0066FF;
    --secondary-blue: #0052CC;
    --light-blue: #E6F0FF;
    --pale-blue: #F5F9FF;
    --dark-blue: #002B5C;
    --accent-blue: #00B8FF;
    
    /* Neutrals */
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #6B7280;
    --dark-gray: #1F2937;
    --border-gray: #E5E7EB;
    
    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 102, 255, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 102, 255, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 102, 255, 0.16);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--dark-gray);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.nav-brand i {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--dark-gray);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s;
}

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

.btn-login {
    padding: 0.5rem 1.5rem;
    background: var(--primary-blue);
    color: var(--white);
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: all 0.3s;
}

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

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    font-size: 1rem;
}

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

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

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

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

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--pale-blue) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--dark-blue);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: 1.5rem 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 2rem;
    color: var(--primary-blue);
}

.floating-card span {
    font-weight: 600;
    color: var(--dark-blue);
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 10%;
    left: 20%;
    animation-delay: 2s;
}

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

/* ===== Section Styles ===== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--medium-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Services Section ===== */
.services {
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-gray);
    transition: all 0.3s;
    cursor: pointer;
}

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

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--light-blue);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.service-icon i {
    font-size: 2.5rem;
    color: var(--primary-blue);
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--dark-blue);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--medium-gray);
    line-height: 1.8;
}

/* ===== Systems Section ===== */
.systems {
    background: var(--pale-blue);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.system-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    cursor: pointer;
    text-align: center;
}

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

.system-card i {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.system-card h3 {
    font-size: 1.25rem;
    color: var(--dark-blue);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.system-card p {
    color: var(--medium-gray);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== Special Feature Section ===== */
.special-feature {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
}

.feature-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.feature-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-image i {
    font-size: 12rem;
    opacity: 0.2;
}

.feature-text h3 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

.feature-text h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.feature-text .highlight {
    color: var(--accent-blue);
    font-weight: 700;
}

.feature-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.feature-list {
    margin-bottom: var(--spacing-md);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.feature-list i {
    color: var(--accent-blue);
}

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

.feature-text .btn:hover {
    background: var(--light-blue);
}

/* ===== Contact Section ===== */
.contact {
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-card {
    background: var(--pale-blue);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.info-card i {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.info-card h4 {
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.info-card p {
    color: var(--medium-gray);
}

.contact-form {
    background: var(--pale-blue);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-blue);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.form-group textarea {
    resize: vertical;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    background: #D1FAE5;
    color: #065F46;
    display: block;
}

.form-message.error {
    background: #FEE2E2;
    color: #991B1B;
    display: block;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-brand i {
    font-size: 2rem;
}

.footer-section h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--accent-blue);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .feature-content {
        grid-template-columns: 1fr;
    }
    
    .feature-image {
        display: none;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border-gray);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .services-grid,
    .systems-grid {
        grid-template-columns: 1fr;
    }
}