:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glow: rgba(99, 102, 241, 0.5);
}

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

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

/* Background Blobs for Atmosphere */
.background-blobs {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    filter: blur(80px);
    border-radius: 50%;
    opacity: 0.4;
    animation: float 20s infinite alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: #4338ca;
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 350px;
    height: 350px;
    background: #8b5cf6;
    bottom: -50px;
    right: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: #ec4899;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, 40px) scale(1.1); }
}

/* Container & Typography */
.container {
    width: 90%;
    max-width: 600px;
    z-index: 10;
    text-align: center;
}

header {
    margin-bottom: 2rem;
}

.glow-text {
    font-size: 3.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px var(--glow);
    margin-bottom: 0.5rem;
}

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

/* Card & Drop Zone */
.upload-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

.drop-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 16px;
    padding: 3rem 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.drop-zone.drag-over {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    transform: scale(1.02);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.icon-wrapper {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    padding: 1.5rem;
    border-radius: 50%;
    margin-bottom: 0.5rem;
    transition: transform 0.3s ease;
}

.drop-zone:hover .icon-wrapper {
    transform: translateY(-5px);
}

/* Buttons */
.primary-btn, .secondary-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: inherit;
}

.primary-btn {
    background: var(--primary);
    color: white;
    width: 100%;
    margin-top: 1.5rem;
}

.primary-btn:hover {
    background: var(--primary-hover);
    box-shadow: 0 0 15px var(--glow);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* File List */
.file-list-container {
    margin-top: 2rem;
    text-align: left;
    animation: fadeIn 0.4s ease forwards;
}

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

.file-list-container h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#file-list {
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* Progress */
.progress-container {
    margin-top: 2rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: var(--primary);
    transition: width 0.3s ease;
}

/* Status Messages */
.status-message {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 12px;
    font-weight: 500;
}

.status-message.success {
    background: rgba(34, 197, 94, 0.1);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.status-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.hidden { display: none; }

/* Scrollbar */
#file-list::-webkit-scrollbar {
    width: 4px;
}
#file-list::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 10px;
}