* {
    margin: 0; padding: 0;
    box-sizing: border-box;
    font-family: Poppins, sans-serif;
}

body {
    background: #f2f2f2;
    transition: 0.3s;
}

/* DARK MODE */
body.dark {
    background: #1a1a1a;
    color: #fff;
}

header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* DARK MODE SWITCH */
.switch {
    position: relative;
    width: 50px;
    height: 25px;
    display: inline-block;
}
.switch input { display: none; }

.slider {
    background: #bbb;
    border-radius: 30px;
    position: absolute;
    inset: 0;
    cursor: pointer;
    transition: .4s;
}
.slider:before {
    content: "";
    width: 21px;
    height: 21px;
    position: absolute;
    left: 2px;
    bottom: 2px;
    background: white;
    border-radius: 50%;
    transition: .4s;
}
input:checked + .slider {
    background: #007bff;
}
input:checked + .slider:before {
    transform: translateX(24px);
}

/* TEST CARDS */
.tests-container {
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.test-card {
    padding: 20px;
    background: white;
    border-radius: 14px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: 0.3s;
    transform-style: preserve-3d;
    position: relative;
}
body.dark .test-card {
    background: #262626;
    box-shadow: 0 4px 10px rgba(255,255,255,0.1);
}

.test-card:hover {
    transform: scale(1.03) rotateX(6deg) rotateY(-6deg);
}

/* NEW BADGE */
.badge-new {
    position: absolute;
    top: 10px;
    right: 10px;
    background: red;
    padding: 5px 10px;
    border-radius: 20px;
    color: white;
    font-size: 12px;
    animation: pop 1s infinite alternate;
}

@keyframes pop {
    0% { transform: scale(1); }
    100% { transform: scale(1.2); }
}

/* POPUP */
.popup {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    justify-content: center;
    align-items: center;
}
.popup-box {
    background: white;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
}
body.dark .popup-box { background: #303030; }

.popup-box button {
    margin-top: 10px;
    padding: 10px;
    width: 100%;
    border: none;
    border-radius: 6px;
    background: #007bff;
    color: white;
    cursor: pointer;
}
/* UNIVERSAL HOME BUTTON */
.home-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 55px;
    height: 55px;
    background: #007bff;
    border-radius: 50%;
    color: #fff;
    font-size: 26px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.25);
    cursor: pointer;
    z-index: 9999;
    transition: 0.2s;
}

.home-btn:active {
    transform: scale(0.88);
}
/* Pure app se text selection aur long-press blue highlight hatane ke liye */
* {
  -webkit-tap-highlight-color: transparent; /* Mobile tap highlight hatata hai */
  -webkit-touch-callout: none;                /* iOS par long-press menu disable karta hai */
  -webkit-user-select: none;                 /* Safari/Chrome select disable */
  -khtml-user-select: none;                  /* Konqueror */
  -moz-user-select: none;                    /* Firefox */
  -ms-user-select: none;                     /* IE/Edge */
  user-select: none;                         /* Standard logic */
}

/* Agar aap chahte hain ki sirf 'input' ya 'textarea' mein selection kaam kare */
input, textarea {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}