:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --background-color: #f0f4f8;
    --card-bg: #ffffff;
    --text-color: #333333;
    --map-fill: #9acd32;
    /* YellowGreen */
    --map-hover: #ffeb3b;
    --map-stroke: #ffffff;
    --popup-bg: rgba(255, 255, 255, 0.95);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Zen Kaku Gothic New', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.app-container {
    width: 100%;
    max-width: 1000px;
    padding: 2rem;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

p {
    font-size: 1.1rem;
    color: #666;
}

main {
    width: 100%;
    background-color: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow);
    position: relative;
    display: flex;
    justify-content: center;
}

#japan-map-container {
    width: 100%;
    max-width: 800px;
}

/* Force override for svg-japan paths */
#japan-map-container path {
    fill: var(--map-fill) !important;
    stroke: var(--map-stroke) !important;
    stroke-width: 1px !important;
    transition: fill 0.3s ease;
    cursor: pointer;
}

#japan-map-container path:hover {
    fill: var(--map-hover) !important;
}

.popup {
    position: absolute;
    background-color: var(--popup-bg);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 100;
    transform: translate(-50%, -100%);
    pointer-events: none;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.popup.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -120%);
}

#popup-text {
    font-weight: bold;
    font-size: 1.2rem;
    color: var(--primary-color);
}

#close-popup {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
    padding: 0;
    line-height: 1;
}

#close-popup:hover {
    color: var(--accent-color);
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }

    .app-container {
        padding: 1rem;
    }

    main {
        padding: 1rem;
    }
}