@import url('https://fonts.googleapis.com/css2?family=Jua&display=swap');

:root {
    /* 기본(다크) 모드 색상 */
    --bg-color: #1a1a1a;
    --container-bg: #2c2c2c;
    --text-color: #f0f0f0;
    --sub-text: #888;
    --content-bg: rgba(0,0,0,0.2);
    --history-item-bg: rgba(255,255,255,0.05);
    --border-color: rgba(255,255,255,0.1);
    
    --primary-gradient: linear-gradient(45deg, #ff416c 0%, #ff4b2b 100%);
    
    /* 로또 공 색상 */
    --color-1: #ffc107;
    --color-2: #03a9f4;
    --color-3: #f44336;
    --color-4: #8bc34a;
    --color-5: #9e9e9e;
}

/* 화이트 모드 설정 */
[data-theme="light"] {
    --bg-color: #f5f7fa;
    --container-bg: #ffffff;
    --text-color: #333333;
    --sub-text: #666;
    --content-bg: #f9f9f9;
    --history-item-bg: #f0f2f5;
    --border-color: #eeeeee;
}

body {
    background-color: var(--bg-color);
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23333" fill-opacity="0.05"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    color: var(--text-color);
    font-family: 'Jua', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-toggle-container {
    margin-bottom: 20px;
    width: 100%;
    max-width: 600px;
    display: flex;
    justify-content: flex-end;
}

#theme-toggle {
    background-color: var(--container-bg);
    border: 2px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-family: 'Jua', sans-serif;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.2s;
}

#theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.container {
    background-color: var(--container-bg);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    text-align: center;
    max-width: 600px;
    width: 100%;
    transition: background-color 0.3s ease;
}

h1 {
    font-size: 2.8rem;
    margin-bottom: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.main-content {
    margin-bottom: 3rem;
    padding: 1.5rem;
    background: var(--content-bg);
    border-radius: 16px;
    transition: background-color 0.3s ease;
}

#generate-btn {
    font-family: 'Jua', sans-serif;
    font-size: 1.6rem;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    color: white;
    cursor: pointer;
    background: var(--primary-gradient);
    box-shadow: 0 10px 20px rgba(255, 65, 108, 0.4);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#generate-btn:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 30px rgba(255, 65, 108, 0.6);
}

/* History Section */
.history-section {
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.history-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--sub-text);
}

#history-list {
    list-style: none;
    padding: 0;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 1.5rem;
}

.history-item {
    background: var(--history-item-bg);
    margin-bottom: 10px;
    padding: 12px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease-out;
    transition: background-color 0.3s ease;
}

.history-item .timestamp {
    font-size: 0.8rem;
    color: var(--sub-text);
}

.history-balls {
    display: flex;
    gap: 8px;
}

.small-ball {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.8rem;
    font-weight: bold;
    color: white;
    box-shadow: inset -2px -2px 4px rgba(0,0,0,0.3), 2px 2px 5px rgba(0,0,0,0.1);
}

.small-ball[data-color="1"] { background: radial-gradient(circle at 30% 30%, #ffd54f, var(--color-1)); }
.small-ball[data-color="2"] { background: radial-gradient(circle at 30% 30%, #4fc3f7, var(--color-2)); }
.small-ball[data-color="3"] { background: radial-gradient(circle at 30% 30%, #e57373, var(--color-3)); }
.small-ball[data-color="4"] { background: radial-gradient(circle at 30% 30%, #aed581, var(--color-4)); }
.small-ball[data-color="5"] { background: radial-gradient(circle at 30% 30%, #bdbdbd, var(--color-5)); }

#clear-history {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--sub-text);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Jua', sans-serif;
    transition: all 0.2s;
}

#clear-history:hover {
    border-color: #ff416c;
    color: #ff416c;
}

/* Partnership Section */
.partnership-section {
    margin-top: 3rem;
    text-align: left;
}

.partnership-section hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.partnership-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--sub-text);
    text-align: center;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--sub-text);
}

.form-group input, 
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--content-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

.form-group input:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: #ff416c;
}

#partnership-submit-btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 12px;
    background: var(--primary-gradient);
    color: white;
    font-size: 1.1rem;
    font-family: 'Jua', sans-serif;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(255, 65, 108, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
}

#partnership-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(255, 65, 108, 0.4);
}

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

/* Comments Section */
.comments-section {
    margin-top: 3rem;
}

.comments-section hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin-bottom: 2rem;
}