:root {
    --bg-color: #f0f2f5;
    --text-color: #333;
    --machine-bg: rgba(255, 255, 255, 0.9);
    --ball-bg: #eee;
    --btn-bg: #007bff;
    --btn-hover: #0056b3;
    --input-bg: #fff;
    --input-border: #ddd;
    --form-card-bg: rgba(255, 255, 255, 0.95);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f0f2f5;
    --machine-bg: rgba(45, 45, 45, 0.9);
    --ball-bg: #444;
    --btn-bg: #375a7f;
    --btn-hover: #2b4764;
    --input-bg: #2d2d2d;
    --input-border: #444;
    --form-card-bg: rgba(35, 35, 35, 0.95);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
    color: var(--text-color);
    min-height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
}

#falling-coins-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    border-radius: 20px;
    border: none;
    background-color: var(--btn-bg);
    color: white;
    cursor: pointer;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: background-color 0.3s ease;
    z-index: 100;
}

#theme-toggle:hover {
    background-color: var(--btn-hover);
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 80px 20px;
    gap: 60px;
}

.lotto-machine {
    text-align: center;
    background: var(--machine-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 600px;
    backdrop-filter: blur(10px);
}

h1 {
    margin-bottom: 30px;
}

.animation-container {
    height: 100px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    width: 100%;
}

.lotto-ball {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--ball-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--text-color);
    box-shadow: inset 0 -5px 10px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.5s ease, transform 0.5s ease, background-color 0.3s ease, color 0.3s ease;
}

#generate-btn {
    padding: 15px 30px;
    font-size: 18px;
    color: #fff;
    background-color: var(--btn-bg);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s active;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

#generate-btn:hover {
    background-color: var(--btn-hover);
    transform: translateY(-2px);
}

#generate-btn:active {
    transform: translateY(0) scale(0.98);
}

/* Partnership Section Styles */
.partnership-section {
    width: 100%;
    max-width: 600px;
}

.form-card {
    background: var(--form-card-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.form-card h2 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 24px;
}

.form-card p {
    margin-bottom: 30px;
    opacity: 0.8;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    font-size: 14px;
}

.form-group input, 
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 16px;
    box-sizing: border-box;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--btn-bg);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background-color: var(--btn-bg);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

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

.submit-btn:active {
    transform: translateY(0);
}

/* Comments Section Styles */
.comments-section {
    width: 100%;
    max-width: 600px;
}

.comments-card {
    background: var(--form-card-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.comments-card h2 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 24px;
}

@media (max-width: 480px) {
    .lotto-ball {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    .lotto-numbers {
        gap: 8px;
    }
    
    .form-card, .comments-card {
        padding: 25px;
    }
}