/* ========================================
   CSS Variables & Root Styles
   ======================================== */
:root {
    --color-primary: #0d3b2e;
    --color-primary-light: #145c47;
    --color-primary-dark: #092a21;
    --color-accent: #1a7a5e;
    --color-accent-light: #22a37d;
    --color-bg-dark: #071f18;
    --color-bg-medium: #0a2920;
    --color-bg-light: #0d3b2e;
    --color-text-light: #ffffff;
    --color-text-muted: #a8c5bc;
    --color-text-subtle: #6b9b8c;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.2);
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    --gradient-dark: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

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

/* ========================================
   Container
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-family: var(--font-family);
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-text-light);
    box-shadow: var(--shadow-sm);
}

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

.btn-outline {
    background: transparent;
    color: var(--color-text-light);
    border: 2px solid var(--color-border-light);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent-light);
}

.btn-full {
    width: 100%;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: transparent;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(7, 31, 24, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text-light);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    font-size: 18px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-light);
    transition: width var(--transition-normal);
}

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

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-light);
    font-size: 24px;
    cursor: pointer;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-title span {
    display: block;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, #4fd1a5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-decoration {
    position: absolute;
    top: 50%;
    right: -10%;
    transform: translateY(-50%);
    z-index: 1;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--color-border);
}

.decoration-circle:nth-child(1) {
    width: 400px;
    height: 400px;
    top: -200px;
    right: 0;
    animation: pulse 8s ease-in-out infinite;
}

.decoration-circle:nth-child(2) {
    width: 300px;
    height: 300px;
    top: -100px;
    right: 50px;
    animation: pulse 8s ease-in-out infinite 1s;
}

.decoration-circle:nth-child(3) {
    width: 200px;
    height: 200px;
    top: 0;
    right: 100px;
    animation: pulse 8s ease-in-out infinite 2s;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.05);
    }
}

/* ========================================
   Section Styles
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-accent-light);
    background: rgba(26, 122, 94, 0.15);
    border-radius: 50px;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(32px, 4vw, 44px);
    font-weight: 700;
    color: var(--color-text-light);
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: 100px 0;
    background: var(--color-bg-medium);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 20px;
    font-size: 16px;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    font-size: 20px;
    flex-shrink: 0;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-subtle);
}

/* ========================================
   Services Section
   ======================================== */
.services {
    padding: 100px 0;
    background: var(--color-bg-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    padding: 40px 30px;
    background: var(--color-bg-medium);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.service-card:hover {
    background: var(--color-bg-light);
    border-color: var(--color-accent);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: rgba(26, 122, 94, 0.15);
    border-radius: 16px;
    font-size: 28px;
    color: var(--color-accent-light);
    margin-bottom: 24px;
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
    background: var(--gradient-primary);
    color: var(--color-text-light);
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* ========================================
   Contact Section
   ======================================== */
.contact {
    padding: 100px 0;
    background: var(--color-bg-medium);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-info > p {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(26, 122, 94, 0.15);
    border-radius: 12px;
    color: var(--color-accent-light);
    font-size: 18px;
    flex-shrink: 0;
}

.contact-text span {
    display: block;
    font-size: 13px;
    color: var(--color-text-subtle);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-text a,
.contact-text p {
    font-size: 16px;
    color: var(--color-text-light);
}

.contact-text a:hover {
    color: var(--color-accent-light);
}

/* Contact Form */
.contact-form-wrapper {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 40px;
}

.form-group {
    margin-bottom: 24px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    font-family: var(--font-family);
    font-size: 15px;
    color: var(--color-text-light);
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    outline: none;
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-subtle);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(26, 122, 94, 0.2);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b9b8c' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-group select option {
    background: var(--color-bg-dark);
    color: var(--color-text-light);
}

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

.contact-form .btn {
    margin-top: 8px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 32px 0;
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-border);
}

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

.footer-content p {
    font-size: 14px;
    color: var(--color-text-subtle);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        gap: 32px;
        background: var(--color-bg-dark);
        transition: right var(--transition-normal);
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
        box-shadow: var(--shadow-lg);
    }

    .nav-link {
        font-size: 18px;
    }

    .nav-toggle {
        display: block;
        z-index: 1000;
    }

    .hero-title {
        font-size: 36px;
    }

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

    .hero-decoration {
        display: none;
    }

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

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

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

    .contact-form-wrapper {
        padding: 30px 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .about,
    .services,
    .contact {
        padding: 70px 0;
    }

    .service-card {
        padding: 30px 24px;
    }

    .feature-card {
        flex-direction: column;
        text-align: center;
    }
}

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

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