/* --- 1. CSS VARIABLES & RESET --- */
:root {
    --color-dark: #0f172a;      /* Deep Slate Background */
    --color-darker: #020617;    /* Almost Black */
    --color-light: #f8fafc;     /* Off-White Text */
    --color-accent: #3b82f6;    /* Electric Blue */
    --color-secondary: #64748b; /* Subtle Gray Text */
    --max-width: 1200px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-darker);
    color: var(--color-light);
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* --- 2. LAYOUT & UTILITIES --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0;
}

.gradient-text {
    background: linear-gradient(90deg, #60a5fa, var(--color-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

/* --- 3. TYPOGRAPHY & HEADINGS --- */
.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    text-align: center;
    color: var(--color-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* --- 4. HEADER & NAV --- */
.header {
    background-color: var(--color-darker);
    border-bottom: 1px solid #1e293b;
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    text-decoration: none;
    color: var(--color-light);
}

.accent {
    color: var(--color-accent);
}

.nav-menu a {
    color: var(--color-secondary);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--color-light);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-light);
    font-size: 2rem;
    cursor: pointer;
}

/* --- 5. BUTTONS --- */
.btn {
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 700;
    transition: all 0.3s;
    border: 1px solid transparent;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: #3b73e8;
}

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

.btn-secondary:hover {
    background-color: #1e293b;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-cta {
    margin-top: 2rem;
    font-size: 1.25rem;
    padding: 1rem 2.5rem;
}

/* --- 6. HERO SECTION --- */
.hero {
    text-align: center;
    padding: 8rem 0 10rem;
}

.tagline {
    color: var(--color-accent);
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--color-secondary);
    max-width: 800px;
    margin: 0 auto 2rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

/* --- 7. SERVICES GRID --- */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.card {
    background-color: var(--color-dark);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #1e293b;
    transition: border-color 0.3s;
}

.card:hover {
    border-color: var(--color-accent);
}

.card .icon {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--color-secondary);
}

/* --- 8. CTA SECTION --- */
.cta {
    text-align: center;
    background-color: var(--color-dark);
    border-top: 1px solid #1e293b;
    border-bottom: 1px solid #1e293b;
}

.btn-cta {
    margin-top: 2rem;
}

.contact-emails {
    margin-top: 2rem;
    color: var(--color-secondary);
}

.contact-emails a {
    color: var(--color-light);
    text-decoration: none;
    font-weight: 500;
}

/* --- 9. FOOTER --- */
.footer {
    padding: 2rem 0;
    text-align: center;
    color: var(--color-secondary);
    font-size: 0.9rem;
}

/* --- 10. RESPONSIVENESS (Mobile First) --- */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-darker);
        border-top: 1px solid #1e293b;
        display: none;
        flex-direction: column;
        padding: 1rem 0;
        text-align: center;
        z-index: 999;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-menu a {
        margin: 0.5rem 0;
        padding: 0.5rem 0;
        border-bottom: 1px solid #1e293b;
    }
    
    .nav-menu a:last-child {
        border-bottom: none;
        margin-top: 1rem;
    }

    .hero-title {
        font-size: 3rem;
    }

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

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

    .btn-large {
        width: 100%;
    }
}