:root {
    --primary: #00ffff;
    --secondary: #ff00ff;
    --dark: #0a0a0f;
    --darker: #050508;
    --gray: #6b7280;
}

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

body {
    background: var(--dark);
    color: white;
    font-family: 'Segoe UI', sans-serif;
}

.bg-animation {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: linear-gradient(45deg, var(--dark), var(--darker), var(--dark));
}

.hero {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    background: linear-gradient(45deg, cyan, magenta);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--gray);
}

/* Neon Upload Box */
.drop-zone {
    width: 340px;
    min-height: 220px;
    margin: 25px auto;
    padding: 25px;
    border-radius: 25px;
    border: 2px dashed rgba(0, 255, 255, 0.6);
    background: rgba(0, 0, 0, 0.45);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.3);
    cursor: pointer;
    transition: 0.3s;
}

.drop-zone:hover {
    transform: scale(1.03);
}

.drop-zone.dragover {
    border-color: magenta;
    box-shadow: 0 0 40px rgba(255, 0, 255, 0.6);
}

.drop-content {
    color: var(--gray);
}

.drop-content .plus {
    font-size: 3.5rem;
    color: rgb(0, 255, 255);
}

/* File list */
.file-list {
    list-style: none;
    margin-top: 15px;
    padding: 0;
}

/* Each file row */
.file-item {
    background: rgba(255,255,255,0.08);
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 8px;
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 16px;
    align-items: center;
}

.file-name {
    max-width: 140px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    display: block;
    font-size: 0.85rem;
}

.file-size {
    font-size: 0.75rem;
    text-align: right;
    color: #aaa;
}

.remove-btn {
    color: rgb(0, 255, 255);
    cursor: pointer;
    font-size: 0.9rem;
}


.remove-btn:hover {
    transform: scale(1.2);
}

/* Big Button */
.big-btn {
    margin-top: 25px;
    padding: 18px 50px;
    font-size: 1.2rem;
    border-radius: 50px;
    background: linear-gradient(45deg, cyan, magenta);
    color: black;
    border: none;
    cursor: pointer;
    font-weight: bold;
    box-shadow: 0 0 30px rgba(0,255,255,0.4);
}

.big-btn:hover {
    transform: scale(1.05);
}

.error-msg {
    color: #ff4d4d !important;
    text-align: center;
    margin-bottom: 12px;
    font-size: 14px;
}

/* Animations */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(10px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}