/* Mobile-First Base Styles (Default for all screens) */
:root {
    --primary-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --primary-color: #007bff;
    --text-color: #333;
    --bg-color: #fff;
    --padding-base: 1rem;
    --gap-base: 1rem;
}

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

body {
    font-family: var(--primary-font);
    color: var(--text-color);
    background: var(--bg-color);
    line-height: 1.6;
    font-size: clamp(1rem, 2vw, 1.1rem);
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

button, .btn {
    padding: 0.8rem 1.5rem;
    font-size: clamp(0.9rem, 2vw, 1rem);
    border: none;
    border-radius: 5px;
    background: var(--primary-color);
    color: #fff;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover, .btn:hover {
    background: darken(var(--primary-color), 10%);
}

/* Responsive Media Queries */

/* Extra Large Screens (≥ 1200px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
        margin: 0 auto;
        padding: 0 var(--padding-base);
    }

    nav {
        padding: 1.5rem 3rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    nav ul {
        display: flex;
        gap: 2rem;
    }

    nav ul li {
        list-style: none;
    }

    nav ul li a {
        font-size: clamp(1rem, 1.5vw, 1.1rem);
    }

    .logo {
        width: 80px;
        height: 80px;
    }

    .hero {
        padding: 6rem 2rem;
        text-align: center;
    }

    .hero h2 {
        font-size: clamp(3.5rem, 5vw, 4rem);
    }

    .hero p {
        font-size: clamp(1.3rem, 2vw, 1.5rem);
        max-width: 600px;
        margin: 1rem auto;
    }

    .hero .btn {
        padding: 1rem 2.5rem;
        font-size: clamp(1rem, 2vw, 1.2rem);
    }

    .featured h3 {
        font-size: clamp(2.5rem, 4vw, 3rem);
        text-align: center;
    }

    .featured .grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
        padding: 0 2rem;
    }

    .portfolio-item {
        max-width: 100%;
    }

    .portfolio-item img {
        height: 250px;
        object-fit: cover;
        width: 100%;
    }

    .portfolio-item h4 {
        font-size: clamp(1.5rem, 2.5vw, 1.8rem);
    }

    .portfolio-item p {
        font-size: clamp(1rem, 1.5vw, 1.1rem);
    }

    footer {
        padding: 2rem;
        text-align: center;
    }

    footer p {
        font-size: clamp(1rem, 1.5vw, 1.2rem);
    }

    .social-icon {
        font-size: 1.8rem;
        margin: 0 0.75rem;
    }

    form {
        max-width: 600px;
        margin: 0 auto;
    }

    input, textarea {
        width: 100%;
        padding: 0.8rem;
        margin-bottom: 1rem;
        font-size: clamp(1rem, 1.5vw, 1.1rem);
        border: 1px solid #ccc;
        border-radius: 5px;
    }
}

/* Large Desktops & Tablets (≤ 1200px) */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
        padding: 0 var(--padding-base);
    }

    nav {
        padding: 1.25rem 2.5rem;
    }

    .hero h2 {
        font-size: clamp(3rem, 5vw, 3.5rem);
    }

    .hero p {
        font-size: clamp(1.2rem, 2vw, 1.4rem);
    }

    .featured .grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .portfolio-item img {
        height: 220px;
    }
}

/* Tablets & Small Laptops (≤ 1024px) */
@media (max-width: 1024px) {
    .container {
        max-width: 720px;
    }

    nav {
        padding: 1rem 2rem;
    }

    .hero h2 {
        font-size: clamp(2.8rem, 5vw, 3.2rem);
    }

    .hero p {
        font-size: clamp(1.2rem, 2.5vw, 1.3rem);
    }

    .featured h3 {
        font-size: clamp(2.2rem, 4vw, 2.5rem);
    }

    .portfolio-item img {
        height: 200px;
        object-fit: cover;
    }

    .social-icon {
        font-size: 1.6rem;
    }
}

/* Tablets & Phablets (≤ 768px) */
@media (max-width: 768px) {
    .container {
        max-width: 100%;
        padding: 0 1rem;
    }

    nav {
        flex-direction: column;
        align-items: center;
        padding: 1rem;
        gap: var(--gap-base);
    }

    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    nav ul li a {
        font-size: clamp(0.9rem, 2vw, 1rem);
    }

    .logo {
        width: 60px;
        height: 60px;
    }

    h1 {
        font-size: clamp(1.6rem, 4vw, 1.8rem);
        text-align: center;
        margin-left: 0;
    }

    .hero {
        padding: 4rem 1rem;
        text-align: center;
    }

    .hero h2 {
        font-size: clamp(2.2rem, 6vw, 2.5rem);
    }

    .hero p {
        font-size: clamp(1rem, 2vw, 1.1rem);
    }

    .hero .btn {
        padding: 0.8rem 2rem;
        font-size: clamp(0.9rem, 2vw, 1rem);
    }

    .featured h3 {
        font-size: clamp(2rem, 5vw, 2.2rem);
    }

    .featured .grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 1rem;
    }

    .portfolio-item {
        max-width: 95%;
        margin: 0 auto;
    }

    .portfolio-item img {
        height: 180px;
    }

    footer p {
        font-size: clamp(0.9rem, 2vw, 1rem);
    }

    .social-icon {
        font-size: 1.5rem;
        margin: 0 0.5rem;
    }

    form {
        max-width: 90%;
    }

    input, textarea {
        font-size: clamp(0.9rem, 2vw, 1rem);
    }

    .modal {
        width: 90%;
        max-width: 500px;
        padding: 1.5rem;
    }
}

/* Mobile Phones (≤ 480px) */
@media (max-width: 480px) {
    .hero h2 {
        font-size: clamp(1.8rem, 5vw, 2rem);
    }

    .hero p {
        font-size: clamp(0.9rem, 2vw, 1rem);
    }

    .hero .btn {
        padding: 0.6rem 1.5rem;
        font-size: clamp(0.85rem, 2vw, 0.95rem);
    }

    .portfolio-item h4 {
        font-size: clamp(1.2rem, 3vw, 1.3rem);
    }

    .portfolio-item p {
        font-size: clamp(0.8rem, 2vw, 0.9rem);
    }

    .portfolio-item img {
        height: 150px;
    }

    .featured h3 {
        font-size: clamp(1.6rem, 4vw, 1.8rem);
    }

    footer p {
        font-size: clamp(0.85rem, 2vw, 0.95rem);
    }

    .social-icon {
        font-size: 1.3rem;
        margin: 0 0.4rem;
    }

    .modal {
        width: 95%;
        padding: 1rem;
    }
}

/* Extra Small Devices (≤ 360px) */
@media (max-width: 360px) {
    h1 {
        font-size: clamp(1.3rem, 4vw, 1.5rem);
    }

    .hero h2 {
        font-size: clamp(1.5rem, 5vw, 1.7rem);
    }

    .hero p {
        font-size: clamp(0.85rem, 2vw, 0.95rem);
    }

    .hero .btn {
        font-size: clamp(0.75rem, 2vw, 0.85rem);
        padding: 0.5rem 1.2rem;
    }

    .portfolio-item h4 {
        font-size: clamp(1rem, 3vw, 1.1rem);
    }

    .portfolio-item p {
        font-size: clamp(0.75rem, 2vw, 0.85rem);
    }

    .portfolio-item img {
        height: 120px;
    }

    footer p {
        font-size: clamp(0.75rem, 2vw, 0.85rem);
    }

    .social-icon {
        font-size: 1.2rem;
    }
}