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

body {
    background: #0d0d0d;
    color: #fff;
    padding: 20px;
}


/* Glassmorphism Navbar */

.navbar {
    width: 100%;
    height: 60px;
    margin-bottom: 20px;
    backdrop-filter: blur(18px);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 14px;
}


/* Header */

header {
    text-align: center;
    margin: 25px 0;
}

.muted {
    opacity: 0.7;
}


/* TOOL CONTAINER (Glass Box) */

.tool-container {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 25px;
    padding: 20px;
}

.tool-container>div {
    padding: 22px;
    border-radius: 18px;
    backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.4);
}


/* 
   DRAG & DROP UPLOAD BOX */

.upload-box {
    text-align: center;
    border: 2px dashed rgba(255, 255, 255, 0.35);
    transition: 0.3s;
    cursor: pointer;
    padding: 40px !important;
}

.upload-box:hover {
    border-color: #6b9dfc;
    background: rgba(255, 255, 255, 0.1);
}

.upload-box.drag-over {
    border-color: #00d9ff;
    background: rgba(0, 217, 255, 0.15);
}


/* Hide default file input */

.upload-box input {
    display: none;
}


/* BUTTONS – GRADIENT STYLE */

.primary-btn,
.download-btn {
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    color: #fff;
    background: linear-gradient(135deg, #4d9fff, #1bc2ff);
    transition: 0.25s ease;
}

.primary-btn:hover,
.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 18px rgba(0, 200, 255, 0.6);
}


/*  LOADING ANIMATION */

.loader {
    width: 34px;
    height: 34px;
    border: 4px solid rgba(255, 255, 255, 0.25);
    border-top-color: #1bc2ff;
    border-radius: 50%;
    margin: 15px auto;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}


/* 
   SUCCESS POPUP ANIMATION */

.success-popup {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(0, 255, 136, 0.22);
    padding: 15px 22px;
    border-radius: 14px;
    border: 1px solid rgba(0, 255, 136, 0.5);
    box-shadow: 0 0 12px rgba(0, 255, 136, 0.5);
    backdrop-filter: blur(10px);
    color: #00ff9d;
    font-weight: 600;
    opacity: 0;
    transform: translateY(-20px);
    animation: popup 0.4s forwards;
}

@keyframes popup {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.success-popup.hide {
    animation: hidePopup 0.4s forwards;
}

@keyframes hidePopup {
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}


/* RESPONSIVE */

@media (max-width: 900px) {
    .tool-container {
        grid-template-columns: 1fr;
    }
}