:root {
    --primary-color: #5E5CE6;
    --secondary-color: #00C4CC;
    --background-color: #F2F2F7;
    --surface-color: #FFFFFF;
    --text-color: #1C1C1E;
    --light-gray-color: #E5E5EA;
    --border-radius: 12px;
    --font-family: 'system-ui', -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--background-color);
    font-family: var(--font-family);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 15px;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), #A450E4);
    color: white;
    padding: 100px 0;
    text-align: center;
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background-color: var(--secondary-color);
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 600;
    padding: 15px 35px;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.upload-section {
    padding: 60px 0;
    text-align: center;
}

#upload-card {
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    max-width: 600px;
    margin: 0 auto;
}

#file-input {
    display: none;
}

#processing-status {
    text-align: left;
}

.progress-bar-container {
    background-color: var(--light-gray-color);
    border-radius: 5px;
    height: 10px;
    margin: 15px 0;
}

.progress-bar {
    width: 0;
    height: 100%;
    background-color: var(--secondary-color);
    border-radius: 5px;
    transition: width 0.5s ease-in-out;
}

#status-text {
    font-weight: 500;
    margin-bottom: 1rem;
}

.hidden {
    display: none;
}