/* --- System Design Tokens --- */

:root {
    --bg-surface: #f8fafc;
    --card-surface: #ffffff;
    --border-color: #e2e8f0;
    --brand-primary: #4f46e5;
    --brand-primary-hover: #4338ca;
    --brand-dark: #0f172a;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --tag-blue: #eff6ff;
    --tag-blue-text: #1d4ed8;
    --tag-green: #f0fdf4;
    --tag-green-text: #15803d;
    --tag-purple: #faf5ff;
    --tag-purple-text: #7e22ce;
    --radius-lg: 12px;
    --radius-md: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}


/* --- Base Layout & Normalization --- */

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-surface);
    color: #787878;
    line-height: 1.5;
    padding: relative;
}

.portal-container {
    max-width: 1000px;
    margin: 0 auto;
}


/* --- Header Component --- */

.portal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 32px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-mark {
    background-color: var(--brand-primary);
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.brand p {
    font-size: 0.9rem;
    color: var(--bs-dark);
}

.system-status {
    font-size: 0.85rem;
    color: var(--bs-dark);
    background: #fff;
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: #22c55e;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px #22c55e;
}


/* --- Structured Download Rows --- */

.download-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.list-item {
    background: var(--card-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.list-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}


/* Image Wrapper */

.item-preview {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
}

.item-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}


/* Information Configuration */

.item-details {
    flex-grow: 1;
}

.meta-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.tag {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.tag-software {
    background: var(--tag-blue);
    color: var(--tag-blue-text);
}

.tag-docs {
    background: var(--tag-purple);
    color: var(--tag-purple-text);
}

.tag-assets {
    background: var(--tag-green);
    color: var(--tag-green-text);
}

.version-badge {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-surface);
    padding: 1px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-family: monospace;
}

.item-details h3 {
    font-size: 1.15rem;
    color: var(--brand-dark);
    margin-bottom: 4px;
}

.item-details p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    max-width: 650px;
}

.file-specs {
    display: flex;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.file-specs span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.checksum {
    font-family: monospace;
    background: var(--bg-surface);
    padding: 0 4px;
    border-radius: 2px;
}


/* Action Controls */

.item-actions {
    flex-shrink: 0;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--brand-primary);
    color: #ffffff;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--brand-dark);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-surface);
    border-color: var(--text-muted);
}


/* --- Footer Area --- */

.portal-footer {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.portal-footer a {
    color: var(--brand-primary);
    text-decoration: none;
}

.portal-footer a:hover {
    text-decoration: underline;
}


/* --- Responsive Adaptations --- */

@media (max-width: 768px) {
    .portal-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    .list-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 16px;
    }
    .item-actions {
        width: 100%;
    }
    .action-btn {
        width: 100%;
        justify-content: center;
    }
    .file-specs {
        flex-wrap: wrap;
        gap: 10px;
    }
}