@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;700&display=swap');

:root {
    --bg-color: #050510;
    --panel-bg: rgba(20, 20, 40, 0.8);
    --primary-color: #6c5ce7;
    --accent-color: #00f2ff;
    --text-color: #ffffff;
    --danger-color: #ff3e3e;
    --planet-text: #ffffff;
}

.back-home-link {
    position: absolute;
    top: max(8px, env(safe-area-inset-top));
    left: max(10px, env(safe-area-inset-left));
    z-index: 1000;
    color: rgba(214, 236, 255, 0.78);
    text-decoration: none;
    font-size: 0.54rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: color 0.3s, opacity 0.2s;
}

.back-home-link:hover {
    color: var(--accent-color);
    opacity: 1;
}

.game-meta {
    position: absolute;
    top: max(8px, env(safe-area-inset-top));
    right: max(10px, env(safe-area-inset-right));
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    font-size: 0.5rem;
    color: rgba(194, 224, 255, 0.72);
    letter-spacing: 0.3px;
    text-align: right;
}

#game-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(1px 1px at 20px 30px, #fff, rgba(255, 255, 255, 0)),
        radial-gradient(1.5px 1.5px at 100px 150px, #fff, rgba(255, 255, 255, 0)),
        radial-gradient(1px 1px at 200px 250px, #fff, rgba(255, 255, 255, 0)),
        radial-gradient(2px 2px at 300px 450px, #fff, rgba(255, 255, 255, 0)),
        radial-gradient(1.5px 1.5px at 150px 500px, #fff, rgba(255, 255, 255, 0)),
        radial-gradient(1px 1px at 50px 400px, #fff, rgba(255, 255, 255, 0));
    background-size: 300px 400px;
    opacity: 0.3;
    z-index: 1;
    pointer-events: none;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Outfit', sans-serif;
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#constellation-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    transition: opacity 2s ease-in-out;
    opacity: 0.6;
}

/* オリオン座 */
.constellation-orion {
    background-image: 
        radial-gradient(2px 2px at 150px 200px, #fff, transparent),
        radial-gradient(2px 2px at 210px 200px, #fff, transparent),
        radial-gradient(2px 2px at 165px 240px, #fff, transparent),
        radial-gradient(2px 2px at 180px 240px, #fff, transparent),
        radial-gradient(2px 2px at 195px 240px, #fff, transparent),
        radial-gradient(2px 2px at 160px 280px, #fff, transparent),
        radial-gradient(2px 2px at 200px 280px, #fff, transparent);
}

/* カシオペア座 */
.constellation-cassiopeia {
    background-image: 
        radial-gradient(2px 2px at 100px 100px, #fff, transparent),
        radial-gradient(2px 2px at 130px 130px, #fff, transparent),
        radial-gradient(2px 2px at 160px 110px, #fff, transparent),
        radial-gradient(2px 2px at 190px 140px, #fff, transparent),
        radial-gradient(2px 2px at 220px 110px, #fff, transparent);
}

/* 北斗七星 */
.constellation-ursa {
    background-image: 
        radial-gradient(2px 2px at 50px 150px, #fff, transparent),
        radial-gradient(2px 2px at 80px 160px, #fff, transparent),
        radial-gradient(2px 2px at 110px 170px, #fff, transparent),
        radial-gradient(2px 2px at 130px 200px, #fff, transparent),
        radial-gradient(2px 2px at 170px 210px, #fff, transparent),
        radial-gradient(2px 2px at 175px 250px, #fff, transparent),
        radial-gradient(2px 2px at 135px 245px, #fff, transparent);
}

/* 南十字星 */
.constellation-crux {
    background-image: 
        radial-gradient(3px 3px at 180px 300px, #fff, transparent),
        radial-gradient(3px 3px at 180px 380px, #fff, transparent),
        radial-gradient(2px 2px at 140px 340px, #fff, transparent),
        radial-gradient(2px 2px at 220px 340px, #fff, transparent);
}

#game-container {
    position: relative;
    width: 360px;
    height: 600px;
    background: 
        radial-gradient(circle at 20% 30%, rgba(108, 92, 231, 0.2) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(0, 210, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(45, 52, 54, 0.5) 0%, #000 100%);
    background-color: #000;
    border: 4px solid var(--primary-color);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(108, 92, 231, 0.3), inset 0 0 50px rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
}

#ui-layer {
    padding: 20px;
    z-index: 10;
}

.info-panel {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    align-items: center;
    background: var(--panel-bg);
    padding: 15px 25px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.score-container, .best-container {
    text-align: center;
    flex: 1;
}

.label {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--accent-color);
    display: block;
    margin-bottom: 5px;
}

#score, #best-score {
    font-size: 2rem;
    font-weight: 700;
}

#best-date {
    font-size: 0.6rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 2px;
}

#final-best-date {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    margin-left: 5px;
}

.next-container {
    text-align: right;
    width: 100px;
}

#next-planet-preview {
    min-width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-left: auto;
    padding: 5px;
    gap: 4px;
}

.next-planet-name {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

#game-canvas-container {
    flex-grow: 1;
    cursor: crosshair;
    position: relative;
}

#game-over-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(5px);
}

#game-over-screen.hidden {
    display: none;
}

h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--danger-color);
    text-shadow: 0 0 20px rgba(255, 62, 62, 0.5);
}

#restart-button {
    margin-top: 2rem;
    padding: 12px 30px;
    background: var(--accent-color);
    color: #000;
    border: none;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

#restart-button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--accent-color);
}

/* モバイル向け最適化 */
@media (max-width: 768px) {
    body {
        height: 100dvh;
        min-height: 100dvh;
        justify-content: flex-start;
        align-items: stretch;
    }

    #game-container {
        width: 100vw;
        max-width: 100vw;
        height: 100dvh;
        height: -webkit-fill-available; /* 秋のSafari対策 */
        padding-bottom: env(safe-area-inset-bottom);
        border-radius: 0;
        border: none;
    }

    #ui-layer {
        padding: 10px;
    }

    .info-panel {
        padding: 10px 15px;
        gap: 10px;
    }

    #score, #best-score {
        font-size: 1.5rem;
    }

    .label {
        font-size: 0.7rem;
        margin-bottom: 2px;
    }

    .next-container {
        width: 70px;
    }

    #next-planet-preview {
        min-width: 60px;
        height: 60px;
        padding: 2px;
    }

    .next-planet-name {
        font-size: 0.6rem;
    }

    #next-planet-preview canvas {
        width: 40px;
        height: 40px;
    }

    h1 {
        font-size: 2.5rem;
    }

    .game-meta {
        top: calc(8px + env(safe-area-inset-top));
        right: 8px;
        font-size: 0.45rem;
    }

    .back-home-link {
        top: calc(8px + env(safe-area-inset-top));
        left: 8px;
        font-size: 0.48rem;
    }
}