:root {
    color-scheme: light;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-strong: #f0f4f8;
    --text: #162033;
    --muted: #667085;
    --line: #d8dee8;
    --primary: #2563eb;
    --primary-strong: #1d4ed8;
    --success: #168a5b;
    --warning: #b7791f;
    --danger: #dc2626;
    --shadow: 0 16px 40px rgba(25, 35, 60, 0.08);
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #10131a;
    --surface: #171b24;
    --surface-strong: #202634;
    --text: #eef2f8;
    --muted: #a7b0c0;
    --line: #303746;
    --primary: #63a0ff;
    --primary-strong: #8ab8ff;
    --success: #39c38c;
    --warning: #e4b455;
    --danger: #ff6b6b;
    --shadow: 0 18px 42px rgba(0, 0, 0, 0.26);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
        --bg: #10131a;
        --surface: #171b24;
        --surface-strong: #202634;
        --text: #eef2f8;
        --muted: #a7b0c0;
        --line: #303746;
        --primary: #63a0ff;
        --primary-strong: #8ab8ff;
        --success: #39c38c;
        --warning: #e4b455;
        --danger: #ff6b6b;
        --shadow: 0 18px 42px rgba(0, 0, 0, 0.26);
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background:
        linear-gradient(180deg, rgba(37, 99, 235, 0.08), transparent 340px),
        var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

input,
select,
textarea,
button {
    font: inherit;
}

.app-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 18px 0 48px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0 28px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-mark {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}

.brand strong,
.brand small {
    display: block;
}

.brand small,
.muted,
.heading-meta {
    color: var(--muted);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-actions a,
.text-button,
.icon-button {
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--text);
    border-radius: 8px;
    padding: 9px 12px;
    cursor: pointer;
}

.icon-button {
    width: 40px;
    height: 40px;
    padding: 0;
}

.panel {
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 22px;
}

.page-heading,
.panel-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-end;
}

.page-heading {
    margin: 10px 0 18px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

h1,
h2 {
    margin: 0;
    letter-spacing: 0;
}

h1 {
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    line-height: 1.05;
}

h2 {
    font-size: 1.12rem;
}

.auth-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 28px;
    align-items: center;
    min-height: 68vh;
}

.auth-copy p:last-child {
    max-width: 560px;
    color: var(--muted);
    line-height: 1.7;
}

.auth-panel,
.settings-panel,
.upload-panel {
    display: grid;
    gap: 16px;
}

label {
    display: grid;
    gap: 8px;
    color: var(--muted);
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    padding: 10px 12px;
}

input,
select {
    min-height: 44px;
}

textarea {
    resize: vertical;
}

.primary-button,
.secondary-button,
.small-button {
    border: 0;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 800;
}

.primary-button {
    min-height: 46px;
    background: var(--primary);
    color: #fff;
}

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

.secondary-button {
    min-height: 44px;
    background: var(--surface-strong);
    color: var(--text);
    border: 1px solid var(--line);
    padding: 0 16px;
}

.danger-button {
    color: var(--danger);
    border-color: color-mix(in srgb, var(--danger) 45%, var(--line));
}

.small-button {
    min-height: 34px;
    padding: 0 10px;
    background: var(--surface-strong);
    color: var(--text);
    border: 1px solid var(--line);
}

.small-button.danger {
    color: var(--danger);
}

.subtle-link {
    text-align: center;
    color: var(--primary);
    font-weight: 700;
}

.flash-stack {
    display: grid;
    gap: 10px;
    margin-bottom: 16px;
}

.flash {
    border: 1px solid var(--line);
    border-left: 5px solid var(--primary);
    border-radius: 8px;
    background: var(--surface);
    padding: 12px 14px;
}

.flash-success {
    border-left-color: var(--success);
}

.flash-warning {
    border-left-color: var(--warning);
}

.flash-danger {
    border-left-color: var(--danger);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.status-panel,
.result-panel,
.device-panel,
.server-panel {
    margin-top: 18px;
}

.upload-progress {
    display: grid;
    gap: 8px;
}

.server-browser {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}

.server-results {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.server-list {
    display: grid;
    gap: 8px;
}

.server-explorer-head {
    display: grid;
    gap: 4px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    background: var(--surface-strong);
}

.server-explorer-head strong,
.server-explorer-head small {
    overflow-wrap: anywhere;
}

.server-explorer-head small {
    color: var(--muted);
}

.server-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    background: var(--surface-strong);
}

.server-row span,
.server-row small {
    display: block;
    overflow-wrap: anywhere;
}

.server-row small {
    color: var(--muted);
}

.device-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
    gap: 16px;
    margin-top: 18px;
}

.device-grid form,
.device-actions {
    display: grid;
    gap: 12px;
    align-content: start;
}

.device-results {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.device-result {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 12px;
    background: var(--surface-strong);
}

.device-result strong,
.device-result small {
    display: block;
}

.device-result small {
    color: var(--muted);
    word-break: break-all;
}

.help-modal,
.server-modal {
    width: min(720px, calc(100% - 28px));
    max-height: min(760px, calc(100vh - 32px));
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow);
    padding: 0;
}

.help-modal::backdrop,
.server-modal::backdrop {
    background: rgba(15, 23, 42, 0.58);
}

.modal-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
    border-bottom: 1px solid var(--line);
    padding: 18px;
}

.help-content {
    display: grid;
    gap: 14px;
    padding: 18px;
    overflow: auto;
}

.help-content p,
.help-content ol {
    margin: 0;
    color: var(--muted);
    line-height: 1.65;
}

.help-content h3 {
    margin: 6px 0 0;
}

.help-content pre {
    margin: 0;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-strong);
    padding: 12px;
}

.help-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.server-modal-body {
    display: grid;
    gap: 14px;
    padding: 18px;
}

.server-modal .server-results {
    max-height: min(560px, calc(100vh - 210px));
    overflow: auto;
    margin-top: 0;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 18px 0;
}

.step {
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-strong);
    padding: 12px;
    color: var(--muted);
}

.step span {
    display: grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border-radius: 50%;
    background: var(--surface);
    border: 1px solid var(--line);
    color: var(--muted);
    font-weight: 900;
}

.step.active,
.step.done {
    border-color: var(--primary);
    color: var(--text);
}

.step.done span,
.step.active span {
    background: var(--primary);
    color: #fff;
}

.progress-track {
    height: 10px;
    background: var(--surface-strong);
    border: 1px solid var(--line);
    border-radius: 999px;
    overflow: hidden;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--success));
    transition: width 220ms ease;
}

.bulk-toolbar {
    display: grid;
    grid-template-columns: minmax(150px, 1fr) minmax(150px, 1fr) auto minmax(150px, 0.6fr) auto;
    gap: 12px;
    align-items: end;
    margin: 18px 0;
}

.bulk-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.bulk-actions-label {
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 800;
}

.checkbox-field {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    color: var(--text);
}

.checkbox-field input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.data-grid {
    width: 100%;
    min-width: 760px;
    border-collapse: collapse;
    background: var(--surface);
}

.data-grid th,
.data-grid td {
    padding: 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: middle;
    white-space: nowrap;
}

.data-grid th {
    background: var(--surface-strong);
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
}

.data-grid tr:last-child td {
    border-bottom: 0;
}

.data-grid input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.data-grid input[type="checkbox"]:disabled {
    opacity: 0.35;
}

.server-scan-grid {
    min-width: 920px;
}

.server-scan-grid td:nth-child(3),
.server-scan-grid td:nth-child(4) {
    white-space: normal;
    overflow-wrap: anywhere;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid var(--line);
    padding: 5px 10px;
    font-weight: 800;
}

.status-pill.done {
    color: var(--success);
}

.status-pill.wait,
.status-pill.processing {
    color: var(--warning);
}

.status-pill.failed {
    color: var(--danger);
}

.inline-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.empty-state {
    margin-top: 8vh;
    max-width: 720px;
}

.empty-cell {
    color: var(--muted);
    text-align: center !important;
}

.download-link {
    color: var(--primary);
    font-weight: 800;
}

@media (max-width: 820px) {
    .app-shell {
        width: min(100% - 20px, 680px);
        padding-top: 10px;
    }

    .topbar,
    .page-heading,
    .panel-head {
        align-items: flex-start;
        flex-direction: column;
    }

    .auth-layout,
    .dashboard-grid,
    .bulk-toolbar,
    .device-grid {
        grid-template-columns: 1fr;
    }

    .device-result {
        grid-template-columns: 1fr;
    }

    .bulk-actions {
        width: 100%;
    }

    .bulk-actions .secondary-button {
        flex: 1 1 120px;
    }

    .steps {
        grid-template-columns: 1fr;
    }

    .nav-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .panel {
        padding: 16px;
    }
}