* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    border: none;
    outline: none;
    scroll-behavior: smooth;
    font-family: 'Poppins', sans-serif;
}
.container {
  width: 100%;
  max-width: 1200px;
}
img {
  max-width: 100%;
  height: auto;
}

:root {
    --bg-color: #1f242d;
    --second-bg-color: #323946;
    --text-color: #fff;
    --main-color: #0ef;
}

html {
    font-size: 62.5%;
    overflow-x: hidden;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    /* Fix: মোবাইলে কেটে যাওয়া থামাতে */
    overflow-x: hidden;
    overflow-y: auto;
}

section {
    /* Fix: আগেরটা min-width: 100vh ছিল */
    min-height: 100vh;
    padding: 10rem 9% 2rem;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 9%;
    background: var(--bg-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.header.sticky {
    border-bottom: .1rem solid rgba(0, 0, 0, .2);
}

.logo {
    font-size: 2.5rem;
    color: var(--text-color);
    font-weight: 600;
    cursor: default;
}

.navbar a {
    font-size: 1.7rem;
    color: var(--text-color);
    margin-left: 4rem;
    transition: .3s;
}

.navbar a:hover {
    color: var(--main-color);
}

.navbar a.active {
    color: var(--main-color);
}

#menu-icon {
    font-size: 3.6rem;
    color: var(--text-color);
    display: none;
}

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

/* Original রাখছি: desktop এ vw ভিত্তিক সাইজ */
.home-img img {
    width: 35vw;
    animation: floatImage 4s ease-in-out infinite;
}

/* About image (Original) */
.about-img img {
    width: 40vw;
}

@keyframes floatImage {
    0%{ transform: translateY(0) }
    50%{ transform: translateY(-2.4rem) }
    100%{ transform: translateY(0) }
}

.home-content h3 {
    font-size: 3.2rem;
    font-weight: 700;
}

/* Fix: selector এ বাড়তি space ছিল */
.home-content h3:nth-of-type(2) {
    margin-bottom: 2rem;
}

span {
    color: var(--main-color);
}

.home-content h1 {
    font-size: 5.6rem;
    font-weight: 700;
    line-height: 1.3;
}

.home-content p {
    font-size: 1.6rem;
}

.social-media a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 4rem;
    height: 4rem;
    background: transparent;
    border: .2rem solid var(--main-color);
    border-radius: 50%;
    color: var(--main-color);
    margin: 3rem 1.5rem 3rem 0;
    transition: .5s ease;
}

.social-media a i {
    font-size: large;
}

.social-media a:hover {
    background: var(--main-color);
    color: var(--second-bg-color);
    box-shadow: 0 0 1rem var(--main-color);
}

.btn {
    display: inline-block;
    padding: 1rem 2.8rem;
    background: var(--main-color);
    border-radius: 4rem;
    box-shadow: 0 0 1rem var(--main-color);
    font-size: 1.6rem;
    color: var(--second-bg-color);
    letter-spacing: .1rem;
    font-weight: 600;
    transition: .5s ease;
}

.btn:hover {
    box-shadow: none;
}

.about {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    background: var(--second-bg-color);
}

.heading {
    text-align: center;
    font-size: 5rem;
}

.about-content h2 {
    text-align: left;
    line-height: 1.5;
}

.about-content h3 {
    font-size: 2.6rem;
}

.about-content p {
    font-size: 1.6rem;
    margin: 2rem 0 3rem;
}

.services h2 {
    margin-bottom: 5rem;
}

.services-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.services-container .services-box {
    flex: 1 1 30rem;
    background: var(--second-bg-color);
    padding: 3rem 2rem 4rem;
    border-radius: 2rem;
    text-align: center;
    border: .2rem solid var(--bg-color);
    transition: .5s ease;
}

.services-container .services-box:hover {
    border-color: var(--main-color);
    transform: scale(1.02);
}

.services-box i {
    font-size: 7rem;
    color: var(--main-color);
}

.services-box h3 {
    font-size: 2.6rem;
}

.services-box p {
    font-size: 1.6rem;
    margin: 1rem 0 3rem;
}

.portfolio {
    background: var(--second-bg-color);
}

.portfolio h2 {
    margin-bottom: 4rem;
}

.portfolio-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    align-items: center;
    gap: 2.5rem;
}

.portfolio-container .portfolio-box {
    position: relative;
    border-radius: 2rem;
    box-shadow: 0 0 1rem var(--bg-color);
    overflow: hidden;
    display: flex;
}

.portfolio-box img {
    width: 100%;
    transition: .5s ease;
}

.portfolio-box:hover img {
    transform: scale(1.1);
}

.portfolio-box .portfolio-layer {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, .1), var(--main-color));
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
    padding: 0 4rem;
    transform: translateY(100%);
    transition: .5s ease;
}

.portfolio-box:hover .portfolio-layer {
    transform: translateY(0);
}

.portfolio-layer h4 {
    font-size: 3rem;
}

.portfolio-layer p {
    font-size: 1.6rem;
    margin: .3rem 0 1rem;
}

.portfolio-layer a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 5rem;
    height: 5rem;
    background: var(--text-color);
    border-radius: 50%;
}

.portfolio-layer a i {
    font-size: 2rem;
    color: var(--second-bg-color);
}

.contact h2 {
    margin-bottom: 3rem;
}

.contact form {
    max-width: 70rem;
    margin: 1rem auto;
    text-align: center;
    margin-bottom: 3rem;
}

.contact form .input-box {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.contact form .input-box input,
.contact form textarea {
    width: 100%;
    padding: 1.5rem;
    font-size: 1.6rem;
    color: var(--text-color);
    background: var(--second-bg-color);
    border-radius: .8rem;
    margin: .7rem 0;
}

.contact form .input-box input {
    width: 49%;
}

/* Fix: FORM -> form */
.contact form textarea {
    resize: none;
}

.contact form .btn {
    margin-top: 2rem;
    cursor: pointer;
}

.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 2rem 9%;
    background: var(--second-bg-color);
}

.footer-text p {
    font-size: 1.6rem;
}

.footer-iconTap a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: .8rem;
    background: var(--main-color);
    border-radius: .8rem;
    transition: .5s ease;
}

.footer-iconTap a:hover {
    box-shadow: 0 0 1rem var(--main-color);
}

.footer-iconTap i {
    font-size: 2.4rem;
    color: var(--second-bg-color);
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #25D366;
    color: #fff;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
    z-index: 1000;
    transition: 0.3s;
}
.whatsapp-float:hover {
    transform: scale(1.08);
}

/* breakpoints */
@media (max-width: 1200px) {
    html { font-size: 55%; }
}

@media (max-width: 991px) {
    .header { padding: 2rem 3%; }
    section { padding: 10rem 3% 2rem; }
    .footer { padding: 2rem 3%; }
    .services { padding-bottom: 7rem; }
    .portfolio { padding-bottom: 7rem; }
    .contact { min-height: auto; }
}

@media (max-width: 768px) {
    #menu-icon { display: block; }

    .navbar {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 1rem 3%;
        background: var(--bg-color);
        border-top: .1rem solid rgba(0, 0, 0, .2);
        box-shadow: 0 .5rem 1rem rgba(0, 0, 0, .2);
        display: none;
    }

    .navbar.active { display: block; }

    .navbar a {
        display: block;
        font-size: 2rem;
        margin: 3rem 0;
    }

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

    .home-content h3 { font-size: 2.6rem; }
    .home-content h1 { font-size: 5rem; }

    /* Mobile এ ছবিকে বড় দেখাতে vw ব্যবহার */
    .home-img img {
        width: 80vw;
        margin-top: 4rem;
    }

    /* Fix: আগে .about img ছিল, এখন সঠিক selector */
    .about {
        flex-direction: column;
        text-align: center;
    }
    .about-img img {
        width: 70vw;
        margin-top: 4rem;
    }

    .services h2 { margin-bottom: 3rem; }
    .portfolio h2 { margin-bottom: 3rem; }
    .portfolio-container { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 617px) {
    .portfolio-container { grid-template-columns: 1fr; }
}

@media (max-width: 450px) {
    html { font-size: 50%; }
    .contact form .input-box input { width: 100%; }
}

@media (max-width: 365px) {
    /* Fix: আগে 90vh ছিল, এখন 90vw */
    .home-img img { width: 90vw; }
    .about-img img { width: 90vw; }

    .footer { flex-direction: column-reverse; }
    .footer p{ text-align: center; margin-top: 2rem; }
    
}