:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #ec4899;
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --card-bg: rgba(255, 255, 255, 0.05);
    --success-color: #10b981;
    --error-color: #ef4444;
    --font-family: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 10s infinite ease-in-out;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-color);
    bottom: -50px;
    right: -50px;
    animation-delay: 2s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: #8b5cf6;
    top: 40%;
    left: 60%;
    animation-delay: 4s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(30px, -30px);
    }
}

/* App Container */
.app-container {
    width: 90%;
    max-width: 800px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin: 2rem 0;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo i {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 16px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s ease;
    background: var(--card-bg);
    cursor: pointer;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    transform: scale(1.01);
}

.upload-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    transition: color 0.3s ease;
}

.drop-zone:hover .upload-icon {
    color: var(--primary-color);
}

.drop-zone h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.browse-btn {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: underline;
    cursor: pointer;
}

.support-text {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* File List */
.file-list-container {
    margin-top: 2rem;
    animation: fadeIn 0.5s ease;
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.clear-all-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.clear-all-btn:hover {
    color: var(--error-color);
}

.file-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.file-item {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s ease;
}

.file-item:hover {
    transform: translateX(5px);
    background: rgba(255, 255, 255, 0.08);
}

.file-preview {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    background: #000;
}

.file-info {
    flex: 1;
    min-width: 0;
    /* For truncation */
}

.file-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

.file-size {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.format-select {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 8px;
    outline: none;
    cursor: pointer;
    font-family: var(--font-family);
}

.convert-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.convert-btn:hover {
    background: var(--primary-hover);
}

.convert-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
}

.remove-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.2s;
}

.remove-btn:hover {
    color: var(--error-color);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

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

/* Responsive */
@media (max-width: 600px) {
    .app-container {
        width: 95%;
        padding: 1.5rem;
    }

    .file-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .file-controls {
        width: 100%;
        justify-content: space-between;
        margin-top: 0.5rem;
    }
}