* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    border: none;
    outline: none;
    scroll-behavior: smooth;
    font-family: "Poppins", sans-serif;
}

:root {
    --bg-color: #080808;
    --second-bg-color: #ff0c0c17;
    --text-color: white;
    --main-color: #f60b0b;
}

/* Prevent horizontal overflow */
html, body {
    overflow-x: hidden;
}

/* Apply box-sizing globally */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 50%;
    overflow: -moz-hidden-unscrollable;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    padding: 3rem 12% 2rem;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    width: 100%;
}
.header .btn{
    background-color: var(--main-color);
    color: white;
    font-size: 15px;
}
.btn{
    display: inline-block;
    padding: 1rem 2.8rem;
    background: var(--main-color);
    box-shadow: 0 0 25px var(--main-color);
    border-radius: 4rem;
    font-size: 1.6rem;
    color: black;
    border: 2px solid transparent;
    letter-spacing: 0.1rem;
    font-weight: 600;
    transition: 0.3s ease-in-out;
    cursor: pointer;
}
.btn:hover{
    transform: scale(1.05);
    box-shadow: 0 0 50px var(--main-color);
}
.btn-group{
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.btn-group a:nth-of-type(2){
    background-color: black;
    color: var(--main-color);
    border: 2px solid var(--main-color);
    box-shadow:0 0 25px transparent;
}
.btn-group a:nth-of-type(2):hover{
    box-shadow: 0 0 25px var(--main-color);
    background-color: var(--main-color);
    color: black;
}

.logo {
    font-size: 3rem;
    color: var(--text-color);
    font-weight: 800;
    cursor: pointer;
    transition: 0.3s ease;
}

.logo:hover {
    transform: scale(1.1);
}

.logo span {
    text-shadow: 0 0 25px var(--main-color);
    color: var(--main-color);
}
.heading span {
    text-shadow: 0 0 25px var(--main-color);
    color: var(--main-color);
}
.downloads {
    padding: 100px 0;
    text-align: center;
}

.heading {
    text-align: center;
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.downloads-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 20px;
}

.download-card {
    background-color: var(--bg-color);
    border-radius: 10px;
    padding: 20px;
    width: 200px;
    text-align: center;
    border: 3px solid var(--main-color);
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

.download-card:hover {
    transform: scale(1.05);
    box-shadow: 0 0 25px var(--main-color);
}

.app-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 10px;
}

.download-btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--main-color);
    color: #fff;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.download-btn:hover {
    background-color: #e60000;
}
@media (max-width: 768px) {
    .header {
        padding: 2rem 5%;
    }

    .logo {
        font-size: 2.5rem;
    }

    .downloads-container {
        flex-direction: column;
        align-items: center;
    }

    .download-card {
        width: 80%;
        margin-bottom: 20px;
    }
}
.certificates-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.certificate-item {
    background-color: var(--second-bg-color);
    border-radius: 10px;
    padding: 20px;
    width: 250px;
    height: 150px;
    text-align: center;
    border: 3px solid var(--main-color);
}

.certificate-item img {
    width: 150px;
    height: 100px;
    margin-bottom: 10px;
}

.certificate-item p {
    margin: 0;
    font-size: 1.2em;
    color: var(--text-color);
    font-size: medium;
}

.certificate-item:hover {
    background-color: var(--second-bg-color);
    box-shadow: 0 0 25px var(--main-color);
}
.container .btn{
    margin-top: 15px;
    background-color: black;
    color: var(--main-color);
    border: 2px solid var(--main-color);
    box-shadow:0 0 25px transparent;
}
.container .btn:hover{
    box-shadow: 0 0 25px var(--main-color);
    background-color: var(--main-color);
    color: black;
}
/* Full-screen overlay */
.fullscreen-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.certificates .heading{
        margin-top: 15vh;
        font-size: 40px;
        font-weight: bold;
}