:root {
    --brand-green: #01894d;
    --brand-orange: #f39800;
    --bg-color: #f8fafb;
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-sub: #666666;
    --border-color: #e5e7eb;
    --accent-color: #f0fdf4;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --font-family: 'Inter', 'Noto Sans JP', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header */
.main-header {
    background-color: var(--brand-green);
    border-bottom: 2px solid var(--brand-orange);
    padding: 15px 0;
    color: #ffffff;
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 15px;
}

.brand-logo {
    font-weight: 800;
    font-size: 1.3rem;
    color: #ffffff;
}

.title-icon {
    width: 24px;
    height: 24px;
}

nav {
    display: flex;
    gap: 10px;
}

.btn-home {
    background-color: rgba(255, 255, 255, 0.15);
    color: #fff;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.4);
    transition: all 0.2s;
    cursor: pointer;
}

.btn-home:hover {
    background-color: rgba(255, 255, 255, 0.3);
    border-color: #fff;
}

/* Info Section */
.info-section {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.info-header {
    padding: 15px 24px;
    background-color: #f8fafb;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.info-header h2 {
    font-size: 1.1rem;
    color: var(--brand-green);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toggle-icon {
    width: 24px;
    height: 24px;
    fill: var(--text-sub);
    transition: transform 0.3s ease;
}

.info-section.collapsed .info-content {
    display: none;
}

.info-section.collapsed .toggle-icon {
    transform: rotate(-180deg);
}

.info-section.collapsed .info-header {
    border-bottom: none;
}

.info-content {
    padding: 24px;
}

.usage-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.usage-step {
    flex: 1;
    min-width: 250px;
    background-color: #f8fafb;
    padding: 15px 15px 15px 45px;
    border-radius: 6px;
    position: relative;
    font-size: 0.95rem;
}

.usage-step::before {
    content: attr(data-step);
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background-color: var(--brand-green);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 700;
}

/* Settings */
.settings-card {
    padding: 0;
    overflow: hidden;
}

.settings-header {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background-color: #fff;
    transition: background-color 0.2s;
}

.settings-header:hover {
    background-color: #f9fafb;
}

.settings-header h2 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-main);
}

.settings-content {
    padding: 24px;
    border-top: 1px solid var(--border-color);
    background-color: #fff;
}

.settings-card.collapsed .settings-content {
    display: none;
}

.settings-card.collapsed .toggle-icon {
    transform: rotate(-180deg);
}

.settings-row {
    margin-bottom: 20px;
}

.settings-row:last-child {
    margin-bottom: 0;
}

.setting-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-main);
    font-size: 0.95rem;
}

.setting-select,
.setting-input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    background-color: #f9fafb;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-row label {
    font-weight: normal;
    cursor: pointer;
}

.checkbox-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Card Style */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    border: 1px solid var(--border-color);
}

.card h2 {
    font-size: 1.25rem;
    color: var(--text-main);
    padding-bottom: 12px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-number {
    background-color: var(--brand-green);
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 700;
}

/* Upload Area */
.upload-area {
    border: 2px dashed #cbd5e1;
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    background-color: #f8fafc;
    cursor: pointer;
    transition: all 0.2s;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--brand-orange);
    background-color: #fff7ed;
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--brand-green);
    margin-bottom: 16px;
}

.upload-text {
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
}

.upload-subtext {
    font-size: 0.85rem;
    color: var(--text-sub);
}

/* Result Display */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
    flex-wrap: wrap;
    gap: 10px;
}

.header-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-download-all,
.btn-download,
.btn-reset {
    background-color: var(--brand-orange);
    color: white;
    border: none;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(243, 152, 0, 0.2);
    text-decoration: none;
    display: inline-block;
}

.btn-reset {
    background-color: #cbd5e1;
    color: #475569;
    box-shadow: none;
}

.btn-reset:hover {
    background-color: #94a3b8;
}

.btn-download-all:hover,
.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(243, 152, 0, 0.3);
}

.btn-download {
    background-color: var(--brand-green);
    padding: 6px 14px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.results-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    /* Tighter gap for simple list */
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: 0;
    /* Changed from 20px */
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.result-item:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.result-item-header {
    background-color: var(--accent-color);
    padding: 12px 15px;
    /* Increased padding */
    border-radius: 6px;
    border-left: 4px solid var(--brand-green);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    /* Allow wrapping on small screens */
    gap: 10px;
}

.result-item-name {
    font-size: 1rem;
    color: var(--brand-green);
    margin: 0;
    word-break: break-all;
    flex-grow: 1;
    /* Allow name to take up available space */
    min-width: 150px;
}

/* Specific styles for compressor results */
.result-stats {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-sub);
    margin-right: 15px;
    background: white;
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.original-size {
    color: var(--text-sub);
}

.compressed-size {
    color: var(--text-main);
    font-weight: 600;
}

.arrow {
    color: var(--border-color);
    font-weight: bold;
}

.reduction-rate {
    color: var(--brand-green);
    font-weight: 700;
    background-color: #d1fae5;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-sub);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    background-color: #fcfcfc;
}

/* Spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--brand-green);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 10px auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

#loading-indicator {
    text-align: center;
    margin: 20px 0;
}

.hidden {
    display: none !important;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: var(--brand-green);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    z-index: 2000;
    font-weight: 600;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

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

/* Responseive adjustments */
@media (max-width: 600px) {
    .result-item-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .result-stats {
        width: 100%;
        margin-right: 0;
        justify-content: space-between;
    }

    .btn-download {
        width: 100%;
        text-align: center;
    }
}