:root {
    --bg-color: #121212;
    --bg-card: #18181b;
    /* Zinc-900 */
    --bg-card-hover: #27272a;
    /* Zinc-800 */
    --text-primary: #F5F5F5;
    --text-secondary: #a1a1aa;
    /* Zinc-400 */
    --primary: #1D4ED8;
    /* Trust Blue */
    --primary-hover: #1e40af;
    --border: #27272a;

    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;

    --container-width: 1200px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--border) var(--bg-color);
}

/* Custom Scrollbar for Chrome/Safari/Edge */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background-color: var(--border);
    border-radius: 5px;
    border: 2px solid var(--bg-color);
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-secondary);
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1,
h2,
h3,
h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: #fff;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.25rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 400;
}

/* Icons */
.icon-svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
    display: inline-block;
}

.icon-lg {
    width: 40px;
    height: 40px;
    stroke-width: 1.5;
}

.icon-xl {
    width: 64px;
    height: 64px;
    stroke-width: 1;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 96px 0;
    position: relative;
    border-bottom: 1px solid var(--border);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 0;
    background: rgba(18, 18, 18, 0.85);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    gap: 12px;
    align-items: center;
    letter-spacing: -0.01em;
}

.logo .icon-svg {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: #fff;
}

.menu-toggle {
    display: none;
    /* Hidden on desktop */
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

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

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

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

/* Hero */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: 80px;
    background: radial-gradient(circle at 50% 0%, #1e1e24 0%, #121212 50%);
    border-bottom: 1px solid var(--border);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-secondary);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    display: flex;
    justify-content: center;
    color: var(--border);
    opacity: 0.5;
}

/* Services */
.services-header {
    text-align: center;
    margin-bottom: 64px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    padding: 32px;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.5);
}

.service-icon {
    color: var(--primary);
    margin-bottom: 20px;
    display: inline-flex;
    padding: 12px;
    background: rgba(29, 78, 216, 0.1);
    border-radius: 8px;
    width: fit-content;
}

.service-card h3 {
    margin-bottom: 16px;
    font-size: 1.1rem;
}

/* Professional List Styling */
.service-list {
    list-style: none;
    margin-top: 8px;
    padding: 0;
    flex-grow: 1;
}

.service-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.service-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    background-color: var(--text-secondary);
    border-radius: 1px;
    /* Slight rounded square */
    opacity: 0.8;
}

/* Free Safety Check (Form) */
.safety-check {
    background: #0d0d0d;
}

.check-container {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 48px;
    border: 1px solid var(--border);
    max-width: 500px;
    margin: 0 auto;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    background: #000;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}

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

/* Why Choose */
.why-list {
    list-style: none;
    max-width: 700px;
    margin: 48px auto 0;
}

.why-item {
    padding: 24px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 20px;
    border-radius: 8px;
    transition: var(--transition);
}

.why-item:hover {
    border-color: var(--primary);
}

.why-icon {
    color: var(--primary);
    flex-shrink: 0;
}

/* Footer */
footer {
    padding: 80px 0 40px;
    text-align: center;
    border-top: 1px solid var(--border);
    background: #0a0a0a;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin: 32px 0;
}

.social-link {
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Responsive & Mobile Menu */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .navbar .container {
        position: relative;
    }

    .nav-links {
        display: none;
        /* Hidden by default */
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-card);
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        display: flex;
        /* Show when active */
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

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

    .hero-title {
        font-size: 2.75rem;
    }

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

    .section {
        padding: 64px 0;
    }
}