:root {
    --primary: #FF61A6;
    /* Pop Pink */
    --primary-hover: #ff4796;
    --secondary: #FFB100;
    /* Bright Yellow/Orange */
    --accent: #00D2FF;
    /* Pop Blue */
    --text-main: #333333;
    --text-muted: #666666;
    --bg-main: #FFE8A1;
    /* Light Yellow Background */
    --bg-white: #ffffff;
    --border-dark: #333333;

    --success: #00E676;
    --warning: #FFEA00;
    --danger: #FF1744;
}

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

body {
    font-family: "Zen Kaku Gothic Antique", sans-serif;
    background-color: var(--bg-main);
    background-image: radial-gradient(#FFD166 20%, transparent 20%), radial-gradient(#FFD166 20%, transparent 20%);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 3rem 1rem;
    position: relative;
}

.container {
    width: 100%;
    max-width: 900px;
    /* 少しコンパクトにして可愛さを強調 */
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 1rem;
    animation: bounceIn 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.title-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.character-img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    animation: floating 3s ease-in-out infinite;
    filter: drop-shadow(4px 4px 0px var(--border-dark));
}

.header h1 {
    font-size: 3rem;
    font-weight: 400;
    font-family: "Dela Gothic One", sans-serif;
    color: var(--primary);
    text-shadow: 4px 4px 0px var(--border-dark), -2px -2px 0px #fff;
    letter-spacing: 2px;
}

.header p {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
    background-color: white;
    display: inline-block;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    border: 3px solid var(--border-dark);
    box-shadow: 4px 4px 0px var(--border-dark);
}

/* Base Panel Style for Pop Art */
.pop-panel {
    background: var(--bg-white);
    border: 4px solid var(--border-dark);
    border-radius: 24px;
    box-shadow: 8px 8px 0px var(--border-dark);
}

/* Upload Section */
.upload-section {
    width: 100%;
    animation: slideUp 0.6s ease-out;
}

.drop-zone {
    background: #FFF4FA;
    border: 4px dashed var(--primary);
    border-radius: 20px;
    padding: 4rem 2rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    margin: 1.5rem;
}

.drop-zone:hover,
.drop-zone.dragover {
    background: #FFE0F0;
    transform: scale(1.02) rotate(-1deg);
    border-color: var(--primary-hover);
}

.drop-zone-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.upload-icon {
    color: var(--primary);
    margin-bottom: 0.5rem;
    transition: transform 0.3s ease;
    filter: drop-shadow(2px 2px 0px rgba(0, 0, 0, 0.1));
}

.drop-zone:hover .upload-icon,
.drop-zone.dragover .upload-icon {
    transform: translateY(-8px) scale(1.1);
}

.drop-zone h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
}

.formats-info {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 1rem;
    background: #eee;
    padding: 0.3rem 1rem;
    border-radius: 9999px;
}

/* Buttons */
.btn {
    padding: 0.8rem 1.8rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 800;
    border-radius: 9999px;
    border: 3px solid var(--border-dark);
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 4px 4px 0px var(--border-dark);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-icon {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--border-dark);
    cursor: pointer;
    transition: transform 0.2s ease, color 0.2s ease;
    padding: 0.2rem;
}

.btn-icon:hover {
    transform: scale(1.2);
    color: var(--danger);
}

.browse-btn {
    background: var(--accent);
    color: var(--bg-white);
}

.browse-btn:hover {
    background: #00bdf2;
    transform: translateY(2px) translateX(2px);
    box-shadow: 2px 2px 0px var(--border-dark);
}

.primary-btn {
    background: var(--primary);
    color: white;
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(2px) translateX(2px);
    box-shadow: 2px 2px 0px var(--border-dark);
}

.primary-btn:active,
.browse-btn:active,
.secondary-btn:active {
    transform: translateY(4px) translateX(4px);
    box-shadow: 0px 0px 0px var(--border-dark);
}

.secondary-btn {
    background: var(--bg-white);
    color: var(--text-main);
}

.secondary-btn:hover {
    background: #f0f0f0;
    transform: translateY(2px) translateX(2px);
    box-shadow: 2px 2px 0px var(--border-dark);
}

/* Editor Section */
.editor-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    animation: fadeIn 0.5s ease-out;
}

.hidden {
    display: none !important;
}

.controls-panel {
    padding: 1.5rem 2rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    background: var(--bg-white);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
    min-width: 250px;
}

.control-group label {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-main);
}

#quality-value {
    color: var(--primary);
    font-size: 1.3rem;
}

/* Custom Range Slider */
.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 12px;
    border-radius: 6px;
    background: #E0E0E0;
    outline: none;
    border: 2px solid var(--border-dark);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--secondary);
    border: 3px solid var(--border-dark);
    cursor: pointer;
    box-shadow: 2px 2px 0px var(--border-dark);
    transition: transform 0.1s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

/* Custom Select */
.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '▼';
    position: absolute;
    right: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    pointer-events: none;
    color: var(--border-dark);
    font-weight: bolder;
}

select {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    background: #f8f8f8;
    border: 3px solid var(--border-dark);
    color: var(--text-main);
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    outline: none;
    box-shadow: 4px 4px 0px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

select:focus {
    border-color: var(--accent);
    box-shadow: 4px 4px 0px var(--accent);
}

.actions {
    display: flex;
    gap: 0.8rem;
    margin-left: auto;
    flex-wrap: wrap;
    justify-content: flex-end;
}

@media (max-width: 768px) {
    .actions {
        width: 100%;
        margin-left: 0;
        justify-content: stretch;
    }

    .actions .btn {
        flex: 1;
        min-width: 140px;
        font-size: 0.9rem;
        padding: 0.6rem 1rem;
    }
}

/* Previews List */
.previews-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.preview-item {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
}

.preview-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px dashed #E0E0E0;
    padding-bottom: 1rem;
}

.file-name {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--primary);
    word-break: break-all;
    max-width: 90%;
}

.preview-panel {
    display: flex;
    gap: 2rem;
    align-items: stretch;
}

@media (max-width: 860px) {
    .preview-panel {
        flex-direction: column;
    }

    .preview-divider {
        transform: rotate(90deg);
        margin: -1rem auto !important;
    }
}

.preview-card {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.preview-header h3 {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-main);
    background: var(--bg-main);
    padding: 0.2rem 1rem;
    border-radius: 8px;
    border: 2px solid var(--border-dark);
    box-shadow: 2px 2px 0px var(--border-dark);
}

.badge {
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.9rem;
    font-weight: 800;
    border: 2px solid var(--border-dark);
    background: white;
    box-shadow: 2px 2px 0px var(--border-dark);
}

.stats {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.badge.diff {
    background: var(--success);
    color: var(--border-dark);
}

.badge.diff.worse {
    background: var(--danger);
    color: white;
}

.image-container {
    flex: 1;
    background: #f0f0f0 url('data:image/svg+xml;utf8,<svg width="20" height="20" xmlns="http://www.w3.org/2000/svg"><rect width="10" height="10" fill="%23e5e5e5"/><rect x="10" y="10" width="10" height="10" fill="%23e5e5e5"/></svg>');
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    border: 3px solid var(--border-dark);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
}

.image-container img {
    max-width: 100%;
    max-height: 250px;
    object-fit: contain;
    display: block;
}

.preview-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--border-dark);
    margin: 0 -0.5rem;
}

.preview-divider svg {
    width: 48px;
    height: 48px;
    background: var(--accent);
    color: white;
    border-radius: 50%;
    padding: 0.6rem;
    border: 3px solid var(--border-dark);
    box-shadow: 4px 4px 0px var(--border-dark);
    /* removed continuous pulse to avoid heavy CPU load with multiple items */
}

/* Animations */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }

    50% {
        opacity: 1;
        transform: scale(1.05);
    }

    70% {
        transform: scale(0.9);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes floating {
    0% {
        transform: translateY(0px) rotate(0deg);
    }

    50% {
        transform: translateY(-10px) rotate(2deg);
    }

    100% {
        transform: translateY(0px) rotate(0deg);
    }
}