:root {
    --bg: #f5f7fa;
    --surface: #ffffff;
    --surface-muted: #f9fafb;
    --border: #d9dee7;
    --text: #18202a;
    --muted: #667085;
    --primary: #2457d6;
    --primary-hover: #1d46ad;
    --danger: #b42318;
    --danger-bg: #fef3f2;
    --success: #067647;
    --success-bg: #ecfdf3;
    --info: #175cd3;
    --info-bg: #eff8ff;
    --radius: 12px;
    --shadow: 0 8px 24px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

a { color: var(--primary); }

.topbar {
    min-height: 58px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand { font-weight: 750; letter-spacing: -.02em; }

.topbar-actions,
.locale-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
}

.locale-switcher a {
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
    padding: 5px 7px;
    border-radius: 6px;
}

.locale-switcher a:hover { background: var(--surface-muted); }

.install-shell,
.auth-shell {
    width: min(980px, calc(100% - 32px));
    margin: 36px auto;
}

.auth-shell { width: min(460px, calc(100% - 32px)); }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

.card + .card { margin-top: 18px; }

.card-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
}

h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(1.65rem, 4vw, 2.25rem); margin-bottom: 8px; }
h2 { font-size: 1.05rem; margin-top: 26px; margin-bottom: 12px; }
p { color: var(--muted); }

.eyebrow {
    color: var(--primary);
    text-transform: uppercase;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .08em;
}

.requirements {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.requirement-row {
    min-height: 48px;
    padding: 9px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

.requirement-row:last-child { border-bottom: 0; }
.requirement-row small { display: block; color: var(--muted); }
.ok { color: var(--success); }
.bad { color: var(--danger); }
.optional { color: var(--muted); }

fieldset {
    border: 0;
    padding: 0;
    margin: 24px 0;
}

legend {
    font-weight: 750;
    margin-bottom: 12px;
}

.form-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 14px;
}

.form-grid .full { grid-column: 1 / -1; }

label {
    display: grid;
    gap: 6px;
    color: #344054;
    font-size: 13px;
    font-weight: 650;
}

input,
select {
    width: 100%;
    min-height: 42px;
    padding: 9px 11px;
    border: 1px solid #c8d0dc;
    border-radius: 8px;
    background: #fff;
    color: var(--text);
    font: inherit;
    outline: none;
}

input:focus,
select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(36, 87, 214, .12);
}

label small { color: var(--muted); font-weight: 400; }

.button {
    min-height: 40px;
    padding: 8px 14px;
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

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

.button-ghost {
    color: var(--text);
    background: transparent;
    border-color: var(--border);
}

.button:disabled {
    opacity: .5;
    cursor: not-allowed;
}

.alert {
    border-radius: 9px;
    padding: 12px 14px;
    margin: 16px 0;
    border: 1px solid transparent;
}

.alert ul { margin: 0; padding-left: 20px; }
.alert-danger { color: var(--danger); background: var(--danger-bg); border-color: #fecdca; }
.alert-success { color: var(--success); background: var(--success-bg); border-color: #abefc6; }
.alert-info { color: var(--info); background: var(--info-bg); border-color: #b2ddff; }

.auth-card form {
    display: grid;
    gap: 14px;
}

.app-shell {
    min-height: calc(100vh - 58px);
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
}

.sidebar {
    padding: 18px 12px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: block;
    text-decoration: none;
    color: #344054;
    padding: 9px 10px;
    border-radius: 7px;
    font-weight: 650;
    font-size: 14px;
}

.nav-item.active { background: #eef4ff; color: var(--primary); }
.nav-item.disabled { opacity: .45; cursor: not-allowed; }

.content {
    width: min(1200px, 100%);
    padding: 28px;
}

.page-heading { margin-bottom: 18px; }
.page-heading p { margin-bottom: 0; }

.metric-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin: 18px 0;
}

.metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px;
}

.metric-card span { display: block; color: var(--muted); font-size: 13px; }
.metric-card strong { display: block; margin-top: 10px; font-size: 28px; }

.inline-form { margin: 0; }

@media (max-width: 800px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar {
        border-right: 0;
        border-bottom: 1px solid var(--border);
        flex-direction: row;
        overflow-x: auto;
    }
    .nav-item { white-space: nowrap; }
    .content { padding: 18px; }
    .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
    .topbar { padding: 9px 12px; }
    .brand { font-size: 14px; }
    .install-shell, .auth-shell {
        width: min(100% - 20px, 980px);
        margin: 16px auto;
    }
    .card { padding: 18px; }
    .form-grid { grid-template-columns: 1fr; }
    .form-grid .full { grid-column: auto; }
    .metric-grid { grid-template-columns: 1fr; }
    .content { padding: 14px; }
}

textarea {
    width: 100%;
    padding: 9px 11px;
    border: 1px solid #c8d0dc;
    border-radius: 8px;
    background: #fff;
    color: var(--text);
    font: inherit;
    resize: vertical;
    outline: none;
}
textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(36, 87, 214, .12); }
.card-title, .no-margin { margin: 0; }
.muted { color: var(--muted); }
.align-center { align-items: center; }
.form-actions { display: flex; align-items: center; justify-content: flex-end; gap: 9px; }
.filters-grid { display: grid; grid-template-columns: minmax(180px, 2fr) repeat(4, minmax(120px, 1fr)) auto; gap: 10px; margin: 18px 0; }
.objects-filters { grid-template-columns: minmax(220px, 2fr) minmax(150px, 1fr) minmax(130px, 1fr) auto; }
.table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; min-width: 820px; background: var(--surface); }
th, td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; font-size: 13px; }
th { background: var(--surface-muted); color: #475467; font-size: 12px; text-transform: uppercase; letter-spacing: .035em; white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #fcfcfd; }
.strong-link { font-weight: 750; text-decoration: none; }
.cell-subtitle { display: block; max-width: 360px; margin-top: 3px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.actions-cell { display: flex; gap: 6px; align-items: center; white-space: nowrap; }
.button-small { min-height: 32px; padding: 5px 9px; font-size: 12px; }
.button-danger { color: var(--danger); background: #fff; border-color: #fecdca; }
.button-danger:hover { background: var(--danger-bg); }
.badge { display: inline-flex; align-items: center; min-height: 24px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface-muted); font-size: 12px; font-weight: 700; }
.badge-active { color: var(--success); background: var(--success-bg); border-color: #abefc6; }
.badge-disabled { color: var(--danger); background: var(--danger-bg); border-color: #fecdca; }
.badge-read_only { color: var(--info); background: var(--info-bg); border-color: #b2ddff; }
.empty-state { text-align: center; padding: 30px; color: var(--muted); }
.pagination { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 16px; }
.pagination a { min-width: 34px; height: 34px; display: inline-grid; place-items: center; border: 1px solid var(--border); border-radius: 7px; text-decoration: none; font-size: 13px; font-weight: 700; background: var(--surface); }
.pagination a.active { color: #fff; background: var(--primary); border-color: var(--primary); }
.breadcrumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; margin-bottom: 8px; color: var(--muted); font-size: 13px; }
.breadcrumbs a { text-decoration: none; }
.summary-strip { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; overflow: hidden; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 18px; background: var(--border); }
.summary-strip > div { padding: 13px 15px; background: var(--surface); }
.summary-strip span { display: block; color: var(--muted); font-size: 12px; }
.summary-strip strong { display: block; margin-top: 4px; font-size: 15px; }
.upload-form { display: grid; grid-template-columns: minmax(220px,1fr) minmax(280px,2fr) auto; gap: 12px; align-items: end; margin-top: 16px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.small-text { font-size: 11px; }
.checksum { font-size: 11px; color: var(--muted); }

@media (max-width: 980px) {
    .filters-grid, .objects-filters { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .upload-form { grid-template-columns: 1fr; }
    .summary-strip { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 560px) {
    .filters-grid, .objects-filters { grid-template-columns: 1fr; }
    .summary-strip { grid-template-columns: 1fr 1fr; }
    .card-header { align-items: stretch; flex-direction: column; }
    .card-header .button { width: 100%; text-align: center; }
    .form-actions { justify-content: stretch; }
    .form-actions .button { flex: 1; text-align: center; }
}

/* Phase 2 — Object Browser */
.browser-breadcrumbs {
    max-width: 100%;
    overflow-wrap: anywhere;
}
.browser-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px;
    margin: 14px 0;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-muted);
}
.selection-status {
    min-width: max-content;
    font-size: 13px;
}
.selection-status .muted {
    display: block;
    font-size: 11px;
}
.bulk-controls {
    display: grid;
    grid-template-columns: minmax(130px, .8fr) minmax(150px, 1fr) minmax(200px, 1.4fr) auto;
    gap: 8px;
    flex: 1;
    max-width: 760px;
}
.bulk-controls input,
.bulk-controls select,
.bulk-controls .button {
    min-height: 38px;
}
.check-column {
    width: 42px;
    text-align: center;
}
.check-column input {
    width: 18px;
    min-height: 18px;
    height: 18px;
    padding: 0;
    vertical-align: middle;
}
.object-browser-table { min-width: 900px; }
.object-name {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    max-width: 420px;
    overflow-wrap: anywhere;
}
.object-icon { width: 20px; text-align: center; }
.folder-row td { background: #fcfcfd; }
.manage-key { color: var(--muted); overflow-wrap: anywhere; }
.manage-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}
.manage-grid .card + .card { margin-top: 0; }
.manage-card { min-width: 0; }
.stack-form {
    display: grid;
    gap: 13px;
    margin-top: 16px;
}
.details-list {
    display: grid;
    gap: 0;
    margin: 16px 0;
}
.details-list > div {
    display: grid;
    grid-template-columns: 130px minmax(0,1fr);
    gap: 12px;
    padding: 9px 0;
    border-bottom: 1px solid var(--border);
}
.details-list dt { color: var(--muted); font-size: 12px; font-weight: 700; }
.details-list dd { margin: 0; overflow-wrap: anywhere; font-size: 13px; }
.checksum-full { font-size: 11px; word-break: break-all; }
.manage-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.danger-zone { margin-top: 18px; padding-top: 16px; border-top: 1px solid #fecdca; }

@media (max-width: 980px) {
    .browser-toolbar { align-items: stretch; flex-direction: column; }
    .selection-status { min-width: 0; }
    .bulk-controls { max-width: none; grid-template-columns: repeat(2, minmax(0,1fr)); }
    .manage-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .bulk-controls { grid-template-columns: 1fr; }
    .details-list > div { grid-template-columns: 1fr; gap: 3px; }
}

/* Phase 3 — Transfer Engine */
.transfer-card { overflow: hidden; }
.transfer-grid {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) minmax(280px, 2fr) auto;
    gap: 12px;
    align-items: end;
    margin-top: 16px;
}
.transfer-progress {
    margin-top: 18px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-muted);
}
.transfer-progress-heading,
.transfer-progress-meta,
.transfer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.transfer-progress-heading { margin-bottom: 9px; }
.transfer-progress-meta { margin-top: 7px; color: var(--muted); font-size: 12px; }
.transfer-progress progress { width: 100%; height: 14px; }
.transfer-actions { justify-content: flex-end; margin-top: 12px; }
@media (max-width: 980px) {
    .transfer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .transfer-actions { align-items: stretch; flex-direction: column; }
    .transfer-actions .button { width: 100%; }
    .transfer-progress-meta { align-items: flex-start; flex-direction: column; }
}

/* Phase 4 — API Keys */
.api-secret-card { border-color: #b2ddff; }
.credential-grid { display: grid; grid-template-columns: 1fr 1fr minmax(180px,.6fr); gap: 12px; margin-top: 14px; }
.compact-fieldset { margin: 8px 0; }
.checkbox-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; margin-top: 10px; }
.checkbox-option { display: flex; grid-template-columns: none; align-items: center; gap: 8px; min-height: 38px; padding: 7px 9px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-muted); }
.checkbox-option input { width: 17px; height: 17px; min-height: 17px; padding: 0; flex: 0 0 auto; }
.api-key-filters { grid-template-columns: minmax(190px,2fr) repeat(3,minmax(130px,1fr)) auto; }
.api-key-table { min-width: 1120px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 4px; max-width: 330px; }
@media (max-width: 900px) {
    .credential-grid, .checkbox-grid { grid-template-columns: 1fr 1fr; }
    .api-key-filters { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 560px) {
    .credential-grid, .checkbox-grid, .api-key-filters { grid-template-columns: 1fr; }
}

/* Phase 5 — Sharing */
.share-create-form { align-items: start; }
.share-access-card { width: min(520px, 100%); }
.share-access-card .small-text { margin-top: 14px; }
.share-filters { grid-template-columns: minmax(180px, 1fr) repeat(3, minmax(130px, .65fr)) auto; }
.badge-expired, .badge-exhausted, .badge-revoked { background: #f2f4f7; color: #475467; }
@media (max-width: 900px) { .share-filters { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .share-filters { grid-template-columns: 1fr; } }

/* Phase 6 — Administration & Metrics */
.metrics-overview { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.metric-card small { display:block; margin-top:6px; color:var(--muted); font-size:11px; }
.metrics-actions { display:flex; justify-content:flex-end; margin:-6px 0 16px; }
.inline-quota-form { display:flex; align-items:center; gap:6px; min-width:260px; }
.inline-quota-form input { min-width:150px; min-height:32px; height:32px; }
.audit-filters { grid-template-columns:minmax(220px,2fr) minmax(130px,.8fr) minmax(150px,.9fr) auto; }
.log-layout { display:grid; grid-template-columns:minmax(210px,280px) minmax(0,1fr); gap:18px; }
.log-files { display:flex; flex-direction:column; gap:7px; min-width:0; }
.log-file { display:flex; flex-direction:column; gap:3px; padding:9px 10px; border:1px solid var(--border); border-radius:8px; text-decoration:none; min-width:0; }
.log-file strong,.log-file small { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.log-file small { color:var(--muted); }
.log-file.active { border-color:var(--primary); background:var(--info-bg); }
.log-content { min-width:0; }
.log-pre { max-height:620px; overflow:auto; padding:14px; margin:14px 0 0; border-radius:8px; background:#101828; color:#f2f4f7; font:12px/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; white-space:pre-wrap; overflow-wrap:anywhere; }
.usage-bars { display:grid; gap:12px; margin-top:16px; }
.usage-row { display:grid; grid-template-columns:minmax(180px,1fr) minmax(220px,2fr); gap:16px; align-items:center; }
.usage-row small { display:block; color:var(--muted); margin-top:3px; }
.usage-row progress { width:100%; }
.admin-shortcuts { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.shortcut-card { display:flex; flex-direction:column; gap:5px; text-decoration:none; }
.shortcut-card span { color:var(--muted); font-size:13px; }
@media (max-width:980px){.metrics-overview{grid-template-columns:repeat(2,minmax(0,1fr));}.log-layout{grid-template-columns:1fr}.log-files{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));}.usage-row{grid-template-columns:1fr}.audit-filters{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.metrics-overview,.admin-shortcuts,.log-files,.audit-filters{grid-template-columns:1fr}.inline-quota-form{min-width:0;flex-direction:column;align-items:stretch}.inline-quota-form input{min-width:0}}