:root {
    --color-background: #f5f7fb;
    --color-surface: #ffffff;
    --color-border: #d8deea;
    --color-text: #1f2933;
    --color-muted: #6b7280;
    --color-success: #16a34a;
    --color-error: #dc2626;
    --color-warning: #d97706;
    --color-pending: #6366f1;
    --color-info: #2563eb;
    --shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--color-background);
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    align-items: center;
}

main {
    width: min(960px, 100%);
    padding: 0 1.5rem 3rem;
}

.app-header {
    width: min(960px, 100%);
    padding: 2.5rem 1.5rem 1rem;
    text-align: center;
}

.app-header h1 {
    margin: 0 0 0.75rem;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.app-header p {
    margin: 0;
    color: var(--color-muted);
    font-size: 1rem;
}

.card {
    background: var(--color-surface);
    border-radius: 24px;
    padding: 2.25rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid rgba(148, 163, 184, 0.15);
}

.dropzone {
    border: 2px dashed var(--color-border);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    background: rgba(99, 102, 241, 0.04);
    transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
    cursor: pointer;
    outline: none;
}

.dropzone:focus-visible {
    border-color: var(--color-pending);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.dropzone.dragover {
    border-color: var(--color-pending);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.dropzone-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.dropzone-title {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.dropzone-subtitle {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.results-intro {
    margin-top: 0;
    color: var(--color-muted);
}

/* ================================================================== */
/*  Summary banner                                                    */
/* ================================================================== */

.summary-banner {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
    border-radius: 14px;
    background: rgba(148, 163, 184, 0.1);
    border: 1px solid rgba(148, 163, 184, 0.25);
    margin-bottom: 1.25rem;
}

.badge-format {
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-elpx {
    background: rgba(22, 163, 74, 0.15);
    color: var(--color-success);
    border: 1px solid rgba(22, 163, 74, 0.3);
}

.badge-elp {
    background: rgba(217, 119, 6, 0.15);
    color: var(--color-warning);
    border: 1px solid rgba(217, 119, 6, 0.3);
}

.badge-unknown {
    background: rgba(148, 163, 184, 0.2);
    color: var(--color-muted);
}

.summary-counts {
    display: flex;
    gap: 1rem;
    margin-left: auto;
    font-size: 0.95rem;
}

.summary-counts span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* ================================================================== */
/*  Tabs                                                              */
/* ================================================================== */

.tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1.25rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab {
    background: none;
    border: none;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    white-space: nowrap;
    transition: color 0.15s, border-color 0.15s;
    font-family: inherit;
}

.tab:hover {
    color: var(--color-text);
}

.tab.active {
    color: var(--color-pending);
    border-bottom-color: var(--color-pending);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* ================================================================== */
/*  Metadata                                                          */
/* ================================================================== */

.metadata {
    background: rgba(148, 163, 184, 0.12);
    border: 1px solid rgba(148, 163, 184, 0.4);
    border-radius: 18px;
    padding: 1.5rem;
    margin-bottom: 1.75rem;
}

.metadata h3 {
    margin: 0 0 1rem;
    font-size: 1.15rem;
}

.metadata-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.metadata-table th {
    text-align: left;
    padding: 0.35rem 0;
    color: var(--color-muted);
    font-weight: 600;
    width: 160px;
}

.metadata-table td {
    padding: 0.35rem 0;
    word-break: break-word;
}

.metadata-more {
    margin-top: 1rem;
}

.metadata-more summary {
    cursor: pointer;
    color: var(--color-pending);
    font-weight: 600;
    outline: none;
}

.metadata-more summary::marker {
    color: var(--color-pending);
}

.metadata-more-content {
    margin-top: 0.75rem;
    display: grid;
    gap: 1rem;
}

@media (min-width: 640px) {
    .metadata-more-content {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.metadata-more-section h4 {
    margin: 0 0 0.5rem;
    font-size: 0.9rem;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.metadata-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.35rem;
}

.metadata-list li {
    font-size: 0.95rem;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.35rem;
}

.metadata-list code {
    background: rgba(99, 102, 241, 0.15);
    border-radius: 6px;
    padding: 0.15rem 0.45rem;
    font-size: 0.85rem;
}

.metadata-value {
    color: var(--color-text);
    white-space: pre-wrap;
}

.file-name {
    margin: 0 0 0.5rem;
    font-size: 1.2rem;
    font-weight: 600;
}

/* ================================================================== */
/*  Checklist (legacy overview)                                       */
/* ================================================================== */

.checklist {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1rem;
}

.check-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem;
    align-items: start;
    padding: 1rem 1.25rem;
    border-radius: 16px;
    border: 1px solid transparent;
    background: rgba(148, 163, 184, 0.08);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.check-item .icon {
    font-size: 1.75rem;
    line-height: 1;
    margin-top: 0.2rem;
}

.check-item .label {
    display: block;
    font-weight: 600;
}

.check-item .details {
    margin: 0.35rem 0 0;
    color: var(--color-muted);
    font-size: 0.95rem;
    display: none;
}

.check-item.success {
    border-color: rgba(22, 163, 74, 0.2);
    background: rgba(22, 163, 74, 0.08);
}

.check-item.success .icon {
    color: var(--color-success);
}

.check-item.success .details {
    display: block;
    color: var(--color-success);
}

.check-item.error {
    border-color: rgba(220, 38, 38, 0.2);
    background: rgba(220, 38, 38, 0.08);
}

.check-item.error .icon {
    color: var(--color-error);
}

.check-item.error .details {
    display: block;
    color: var(--color-error);
}

.check-item.warning {
    border-color: rgba(217, 119, 6, 0.2);
    background: rgba(217, 119, 6, 0.08);
}

.check-item.warning .icon {
    color: var(--color-warning);
}

.check-item.warning .details {
    display: block;
    color: var(--color-warning);
}

.check-item.pending .icon {
    color: var(--color-pending);
}

/* ================================================================== */
/*  Findings panel                                                    */
/* ================================================================== */

.findings-toolbar {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.findings-toolbar label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-muted);
}

.findings-toolbar select {
    margin-left: 0.35rem;
    padding: 0.3rem 0.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    font-family: inherit;
    font-size: 0.85rem;
}

.findings-list {
    display: grid;
    gap: 0.75rem;
}

.findings-empty {
    color: var(--color-muted);
    text-align: center;
    padding: 2rem;
}

.finding-card {
    border-radius: 12px;
    padding: 0.75rem 1rem;
    border: 1px solid transparent;
}

.finding-error {
    background: rgba(220, 38, 38, 0.06);
    border-color: rgba(220, 38, 38, 0.2);
}

.finding-warning {
    background: rgba(217, 119, 6, 0.06);
    border-color: rgba(217, 119, 6, 0.2);
}

.finding-info {
    background: rgba(37, 99, 235, 0.06);
    border-color: rgba(37, 99, 235, 0.2);
}

.finding-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.finding-icon {
    font-size: 1.1rem;
}

.finding-code {
    background: rgba(99, 102, 241, 0.12);
    padding: 0.1rem 0.45rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-pending);
}

.finding-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-muted);
    background: rgba(148, 163, 184, 0.15);
    padding: 0.1rem 0.45rem;
    border-radius: 6px;
}

.finding-message {
    font-weight: 600;
    font-size: 0.95rem;
}

.finding-details {
    margin: 0.35rem 0 0;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.finding-suggestion {
    margin: 0.25rem 0 0;
    font-size: 0.85rem;
    color: var(--color-muted);
    font-style: italic;
}

.finding-location {
    margin: 0.2rem 0 0;
    font-size: 0.8rem;
    color: var(--color-muted);
}

/* ================================================================== */
/*  Pages tree                                                        */
/* ================================================================== */

.pages-tree {
    font-size: 0.95rem;
}

.panel-empty {
    text-align: center;
    color: var(--color-muted);
    padding: 2rem;
}

.tree-list {
    list-style: none;
    padding-left: 1.25rem;
    margin: 0.25rem 0;
}

.tree-item {
    margin: 0.35rem 0;
    padding: 0.35rem 0;
    border-left: 2px solid var(--color-border);
    padding-left: 0.75rem;
}

.tree-label {
    display: block;
}

.tree-label code {
    font-size: 0.8rem;
    color: var(--color-muted);
}

.tree-meta {
    font-size: 0.8rem;
    color: var(--color-muted);
}

.tree-blocks {
    list-style: none;
    padding-left: 1rem;
    margin: 0.15rem 0;
}

.tree-block {
    margin: 0.2rem 0;
    font-size: 0.9rem;
}

.tree-components {
    list-style: none;
    padding-left: 1rem;
    margin: 0.1rem 0;
}

.tree-component {
    margin: 0.15rem 0;
    font-size: 0.85rem;
}

.type-known {
    color: var(--color-success);
    font-weight: 600;
}

.type-unknown {
    color: var(--color-warning);
    font-weight: 600;
}

.orphan-header {
    margin: 1rem 0 0.5rem;
    color: var(--color-error);
    font-size: 0.95rem;
}

/* ================================================================== */
/*  iDevice panel                                                     */
/* ================================================================== */

.idevice-summary {
    margin-bottom: 1rem;
}

.idevice-counts {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.parse-errors {
    color: var(--color-error);
}

.idevice-type-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.idevice-type-table th,
.idevice-type-table td {
    padding: 0.35rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.idevice-type-table th {
    color: var(--color-muted);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ================================================================== */
/*  Asset panel                                                       */
/* ================================================================== */

.assets-toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.assets-toolbar label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-muted);
}

.assets-toolbar select {
    margin-left: 0.35rem;
    padding: 0.3rem 0.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    font-family: inherit;
    font-size: 0.85rem;
}

.asset-summary {
    margin-bottom: 1rem;
}

.asset-counts {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
    font-size: 0.95rem;
}

.asset-table-container {
    overflow-x: auto;
}

.asset-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.asset-table th,
.asset-table td {
    padding: 0.35rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.asset-table th {
    color: var(--color-muted);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    position: sticky;
    top: 0;
    background: var(--color-surface);
}

.asset-table td {
    word-break: break-all;
}

.asset-missing td {
    color: var(--color-error);
}

/* ================================================================== */
/*  Preview panel                                                     */
/* ================================================================== */

.preview-toolbar {
    margin-bottom: 1rem;
}

.preview-toolbar label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-muted);
}

.preview-toolbar select {
    margin-left: 0.35rem;
    padding: 0.3rem 0.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    font-family: inherit;
    font-size: 0.85rem;
    min-width: 200px;
}

.preview-container {
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    min-height: 400px;
    background: white;
}

.preview-frame {
    width: 100%;
    min-height: 400px;
    border: none;
    display: block;
}

/* ================================================================== */
/*  Badges                                                            */
/* ================================================================== */

.badge {
    display: inline-block;
    padding: 0.1rem 0.45rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-success {
    background: rgba(22, 163, 74, 0.15);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(217, 119, 6, 0.15);
    color: var(--color-warning);
}

.badge-error {
    background: rgba(220, 38, 38, 0.15);
    color: var(--color-error);
}

.badge-muted {
    background: rgba(148, 163, 184, 0.15);
    color: var(--color-muted);
}

/* ================================================================== */
/*  Footer                                                            */
/* ================================================================== */

.app-footer {
    width: 100%;
    text-align: center;
    padding: 1.5rem;
    color: var(--color-muted);
    font-size: 0.9rem;
}

.app-footer .small-print {
    margin-top: 0.4rem;
}

.app-footer .credits {
    margin-top: 0.6rem;
    font-weight: 500;
}

.app-footer .credits a {
    color: inherit;
    text-decoration: underline;
    text-decoration-thickness: 0.08em;
}

/* ================================================================== */
/*  Responsive                                                        */
/* ================================================================== */

@media (max-width: 640px) {
    .card {
        padding: 1.75rem;
    }

    .check-item {
        grid-template-columns: 1fr;
    }

    .check-item .icon {
        margin: 0;
    }

    /* Scale GitHub ribbon on mobile */
    .github-ribbon img {
        width: 110px;
        height: auto;
    }

    .summary-banner {
        flex-direction: column;
        align-items: flex-start;
    }

    .summary-counts {
        margin-left: 0;
    }

    .tabs {
        gap: 0;
    }

    .tab {
        padding: 0.5rem 0.6rem;
        font-size: 0.8rem;
    }
}

/* GitHub ribbon (top-right) */
.github-ribbon {
    position: fixed;
    top: 0;
    right: 0;
    border: 0;
    z-index: 1000;
}

/* Pages list (collapsible under "Checking for pages") */
.pages-collapsible {
    margin-top: 0.5rem;
}
.pages-collapsible summary {
    cursor: pointer;
    color: var(--color-pending);
    font-weight: 600;
}
.pages-list {
    margin: 0.5rem 0 0;
    padding-left: 1.15rem;
}
.pages-list li {
    margin: 0.15rem 0;
}