:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --text-light: #f8fafc;
    --text-muted: #94a3b8;
    --success: #10b981;
    --border: #334155;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: radial-gradient(circle at top right, rgba(99, 102, 241, 0.15), transparent 40%),
                      radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.1), transparent 40%);
}

.container {
    max-width: 800px;
    width: 90%;
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.8s ease-out;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #a5b4fc, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.upload-box {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 3rem 2rem;
    transition: all 0.3s ease;
    background: rgba(15, 23, 42, 0.4);
}

.upload-box:hover, .upload-box.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: var(--primary);
    margin-bottom: 1rem;
}

.upload-content h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-content p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.btn-primary, .btn-scan, .btn-download {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.file-name {
    display: block;
    margin-top: 1rem;
    color: var(--success);
    font-weight: 300;
    font-size: 0.9rem;
}

.btn-scan {
    margin-top: 2rem;
    width: 100%;
    padding: 1rem;
    font-size: 1.2rem;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
}

.btn-scan:disabled {
    background: var(--border);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

.btn-scan:not(:disabled):hover {
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

.status-container, .success-container {
    margin-top: 2rem;
    padding: 2rem;
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border);
    animation: fadeIn 0.5s ease-out;
}

.progress-ring-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
}

.progress-ring__circle {
    transition: stroke-dashoffset 0.35s;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    stroke-dasharray: 326.72; /* 2 * pi * 52 */
    stroke-dashoffset: 326.72;
    stroke-linecap: round;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
}

.success-icon {
    width: 64px;
    height: 64px;
    color: var(--success);
    margin-bottom: 1rem;
}

.btn-download {
    background: var(--success);
    margin-top: 1.5rem;
}

.btn-download:hover {
    background: #059669;
    transform: translateY(-2px);
}

@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}