:root {
    --primary-bg: #1c2331;
    --secondary-bg: #40BCF4;
    --text-color: white;
    --accent-color: #ff8000;
}

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, var(--primary-bg), #2c3e50);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.container {
    background: rgba(28, 35, 49, 0.8);
    border-radius: 16px;
    padding: 30px;
    width: 90%;
    max-width: 800px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.app-header {
    text-align: center;
    margin-bottom: 20px;
    font-size: 2.5rem;
    color: var(--secondary-bg);
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.username-input {
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--secondary-bg);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    font-size: 1rem;
}

.venn-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.venn-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0.7;
    margin: 0 -50px;
    position: relative;
    user-select: none;
}

.venn-circle:hover {
    opacity: 1;
    transform: scale(1.05);
}

#user1-circle {
    background-color: #ff8000;
}

#user2-circle {
    background-color: #40BCF4;
}

#intersection-circle {
    background-color: #00e054;
    z-index: 10;
}

.file-status {
    color: #aaa;
    text-align: center;
    margin-top: 10px;
}

#results {
    text-align: center;
    margin-top: 20px;
}

.movie-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.movie-item {
    background: rgba(255,255,255,0.1);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    color: var(--text-color);
}

.movie-item:hover {
    background: rgba(255,255,255,0.2);
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.btn {
    background-color: var(--secondary-bg);
    color: var(--text-color);
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    opacity: 0.9;
    transform: scale(1.05);
}

.btn:disabled {
    background-color: #888;
    cursor: not-allowed;
    transform: none;
}

.kofi-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin: 20px 0;
}

.kofi-container iframe {
    margin: 0 auto;
}