:root {
    --primary-color: #e53935; /* Red for rise in Korea */
    --background-color: #121212;
    --card-background: rgba(255, 255, 255, 0.05);
    --text-color: #e0e0e0;
    --shadow-color: rgba(229, 57, 53, 0.1);
    --card-text: #ffffff;
    --border-color: rgba(255, 255, 255, 0.1);
    --positive-color: #ff5252;
}

.light-mode {
    --background-color: #f5f7fa;
    --card-background: #ffffff;
    --text-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --card-text: #333333;
    --border-color: #e0e0e0;
    --primary-color: #d32f2f;
    --positive-color: #d32f2f;
}

body {
    margin: 0;
    padding: 20px;
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    position: relative;
    text-align: center;
    background: var(--card-background);
    padding: 40px 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    width: 100%;
    transition: background 0.3s ease, border 0.3s ease, box-shadow 0.3s ease;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    transition: transform 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(20deg);
}

.date-display {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 5px;
    font-weight: 700;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 30px;
}

.stocks-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
    min-height: 100px;
}

.stock-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px var(--shadow-color);
    animation: slideUp 0.5s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

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

.stock-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--card-text);
    margin-bottom: 5px;
}

.stock-reason {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
}

.stock-return {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--positive-color);
}

.generate-btn {
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.generate-btn:hover {
    background-color: #c62828;
    transform: translateY(-2px);
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}