/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Electrolize', 'Noto Sans JP', sans-serif;
    overflow-x: hidden;
    visibility: hidden;
}

body.loaded {
    visibility: visible;
}

/* Home container */
.home {
    min-height: 100vh;
    width: 100%;
    background-image: url('../images/background.png');
    background-repeat: repeat;
    background-size: 50px 50px;
    background-position: 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 67px 46px;
    position: relative;
    animation: backgroundFlow 10s linear infinite;
}

@keyframes backgroundFlow {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 50px 50px;
    }
}

/* Home layout */
.home-layout {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 40px 80px;
    padding: 56px 83px;
    flex-grow: 1;
    max-width: 1400px;
    opacity: 0;
    animation: fadeIn 1s ease-out 0.2s forwards;
}

/* Image container */
.image-container {
    width: 380px;
    height: 438px;
    position: relative;
    flex-shrink: 0;
    overflow: visible;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease-out 0.4s forwards;
}

.illustration {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: 50% 50%;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
    animation: none;
}

/* Title section */
.title-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 23px;
    max-width: 400px;
    min-width: 310px;
    flex-shrink: 0;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease-out 0.6s forwards;
}

/* Main title */
.main-title {
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-family: 'Electrolize', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    text-align: center;
    color: white;
    width: 100%;
    height: auto;
    line-height: 106.285%;
}

.title-line-1 {
    font-size: 48px;
    letter-spacing: 17.28px;
    margin-bottom: 38px;
    -webkit-text-stroke: 5px black;
    text-stroke: 5px black;
    paint-order: stroke fill;
}

.title-line-2 {
    font-size: 40px;
    letter-spacing: 14.4px;
    -webkit-text-stroke: 5px black;
    text-stroke: 5px black;
    paint-order: stroke fill;
}

/* Subtitle */
.subtitle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-family: 'Electrolize', 'Noto Sans JP', sans-serif;
    font-weight: 600;
    font-size: 20px;
    letter-spacing: 1.6px;
    text-align: center;
    color: white;
    width: 100%;
    height: 25px;
    line-height: normal;
    -webkit-text-stroke: 4px black;
    text-stroke: 4px black;
    paint-order: stroke fill;
}

/* Start button */
.start-button {
    width: 300px;
    height: 61px;
    background-color: #7fff00;
    border: 3px solid black;
    border-radius: 13px;
    box-shadow: 3px 4px 0px 0px black;
    padding: 16px 109px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: scale(0.9);
    animation: scaleIn 0.6s ease-out 0.8s forwards;
}

.start-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.start-button:hover::before {
    width: 300px;
    height: 300px;
}

.start-button:hover {
    transform: translateY(-2px);
    box-shadow: 5px 6px 0px 0px black;
}

.start-button:active {
    transform: translateY(2px);
    box-shadow: 1px 2px 0px 0px black;
}

.start-button span {
    font-family: 'Roboto', sans-serif;
    font-weight: 600;
    font-size: 24px;
    color: black;
    text-align: center;
    white-space: nowrap;
    line-height: normal;
    position: relative;
    z-index: 1;
}

/* Keyframe animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* Responsive design */
@media (max-width: 768px) {
    .home {
        padding: 40px 20px;
    }

    .home-layout {
        padding: 30px 20px;
        gap: 10px;
        flex-direction: column;
    }

    .image-container {
        width: 300px;
        height: 346px;
    }

    .title-section {
        min-width: 280px;
    }

    .title-line-1 {
        font-size: 44px;
        letter-spacing: 15px;
    }

    .title-line-2 {
        font-size: 38px;
        letter-spacing: 13px;
    }

    .subtitle {
        font-size: 20px;
        letter-spacing: 1.5px;
    }

    .start-button {
        width: 280px;
        padding: 16px 90px;
    }
}

@media (max-width: 480px) {
    .title-line-1 {
        font-size: 40px;
        letter-spacing: 13px;
    }

    .title-line-2 {
        font-size: 36px;
        letter-spacing: 11px;
    }

    .subtitle {
        font-size: 18px;
    }

    .start-button {
        width: 260px;
        font-size: 20px;
        padding: 14px 80px;
    }
}