* {
    box-sizing: border-box;
}

:root {
    --bg-color: #fff5f7; /* Soft blush */
    --container-bg: #ffffff;
    --text-color: #5d4a4d; /* Warm brown-gray */
    --accent-color: #ff8fa3; /* Rose pink */
    --number-bg: #fff;
    --number-border: #ffd1dc;
    --button-bg: #ffb7c5;
    --button-text: #ffffff;
    --header-font: 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
}

[data-theme="dark"] {
    --bg-color: #2d1b1e;
    --container-bg: #3d2b2e;
    --text-color: #fce4e8;
    --accent-color: #ff8fa3;
    --number-bg: #4d3b3e;
    --number-border: #5d4a4d;
    --button-bg: #ff8fa3;
    --button-text: #ffffff;
}

body {
    font-family: var(--header-font);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.5s ease, color 0.5s ease;
    overflow-x: hidden;
    line-height: 1.6;
}

.container {
    text-align: center;
    padding: 3rem 2rem;
    background-color: var(--container-bg);
    border-radius: 30px; /* Softer corners */
    box-shadow: 0 10px 30px rgba(255, 143, 163, 0.15);
    width: 100%;
    max-width: 600px;
    margin-bottom: 30px;
    border: 1px solid rgba(255, 209, 220, 0.3);
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    color: var(--accent-color);
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1rem;
    opacity: 0.8;
    margin-bottom: 30px;
}

.lotto-numbers {
    display: flex;
    margin: 40px 0;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

.number {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background-color: var(--number-bg);
    border: 2px solid var(--number-border);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 22px;
    font-weight: 600;
    color: var(--text-color);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.number:hover {
    transform: scale(1.1);
}

#generate-btn {
    padding: 16px 40px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    background: linear-gradient(135deg, #ffb7c5 0%, #ff8fa3 100%);
    color: white;
    border: none;
    border-radius: 50px;
    box-shadow: 0 5px 15px rgba(255, 143, 163, 0.4);
    transition: all 0.3s ease;
}

#generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 143, 163, 0.6);
}

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

#theme-toggle {
    background-color: transparent;
    border: 1.5px solid var(--accent-color);
    color: var(--accent-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
}

.contact-section h2, .faq-section h2 {
    color: var(--accent-color);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.form-group input, .form-group textarea {
    border-radius: 15px;
    padding: 15px;
    border: 1px solid var(--number-border);
    background-color: var(--bg-color);
}

#submit-btn {
    border-radius: 50px;
    background: var(--accent-color);
    padding: 15px;
}

/* Sharing Section */
.share-container {
    margin-top: 40px;
    padding-top: 25px;
    border-top: 1px solid var(--number-border);
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.share-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.share-btn.facebook { background-color: #E7F3FF; color: #1877F2; }
.share-btn.twitter { background-color: #f0f0f0; color: #000; }
.share-btn.link { background-color: #FFF0F3; color: #FF8FA3; }

.info-section {
    text-align: left;
}

.faq-item {
    background-color: #fff;
    border: 1px solid var(--number-border);
    border-radius: 20px;
    padding: 20px;
}

.theme-switch-wrapper {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}