/* === CSS Custom Properties (Light Theme) === */
:root {
    --bg: #f4f4f5;
    --panel: #fff;
    --ink: #0f0f10;
    --ink-2: #52525b;
    --line: #d4d4d8;
    --line-2: #c4c4c8;
    --accent: #23AAE1;
    --accent-dark: #1a86b0;
    --ok: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
}

/* === Base Styles === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
}

html, body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--ink);
    min-height: 100vh;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* === Login Screen === */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--bg);
}

.login-box {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, .15);
}

.login-box .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    justify-content: center;
}

.login-box .brand svg {
    width: 48px;
    height: 48px;
}

.login-box .brand div {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--ink);
}

.login-box .brand small {
    display: block;
    font-size: .75rem;
    color: var(--ink-2);
    font-weight: 400;
}

.login-box .field {
    margin-bottom: 16px;
}

.login-box label {
    display: block;
    font-size: .85rem;
    color: var(--ink-2);
    margin-bottom: 6px;
}

.login-box input[type="email"],
.login-box input[type="password"],
.login-box input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--bg);
    color: var(--ink);
    font-size: 1rem;
}

.login-box input:focus {
    outline: none;
    border-color: var(--accent);
}

.login-box .remember {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 20px 0;
    font-size: .9rem;
    color: var(--ink-2);
    cursor: pointer;
}

.login-box .remember input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

.login-box .btn-login {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.login-box .btn-login:hover {
    background: var(--accent-dark);
}

.login-box .btn-login:disabled {
    opacity: .6;
    cursor: not-allowed;
}

.login-box .error {
    background: rgba(248, 113, 113, .15);
    border: 1px solid var(--bad);
    color: var(--bad);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: .9rem;
}

.validation-message {
    color: var(--bad);
    font-size: .8rem;
    margin-top: 4px;
}

/* === Spinner === */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, .3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
    display: inline-block;
}

.spinner.large {
    width: 32px;
    height: 32px;
    border-width: 3px;
    border-color: var(--accent);
    border-top-color: transparent;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === App Layout === */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--bg);
}

/* === Header === */
header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 20px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand .cube {
    width: 36px;
    height: 36px;
}

.brand div {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--ink);
}

.brand small {
    display: block;
    font-size: .7rem;
    color: var(--ink-2);
    font-weight: 400;
}

.grow {
    flex: 1;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: .9rem;
    color: var(--ink-2);
}

.user-info img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.user-info .name {
    color: var(--ink);
    font-weight: 500;
}

.hbtn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    font-size: .85rem;
    cursor: pointer;
    text-decoration: none;
    transition: all .15s;
}

.hbtn:hover {
    background: var(--bg);
    border-color: var(--ink-2);
}

.hbtn svg {
    width: 16px;
    height: 16px;
}

.hbtn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.hbtn.primary:hover {
    background: var(--accent-dark);
}

/* === Filters === */
.filters {
    display: flex;
    gap: 12px;
    padding: 12px 20px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    flex-wrap: wrap;
    align-items: flex-end;
}

.fgroup {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fgroup label {
    font-size: .75rem;
    color: var(--ink-2);
}

.fgroup select,
.fgroup input {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--bg);
    color: var(--ink);
    font-size: .9rem;
    min-width: 160px;
}

.fgroup.search-group {
    flex: 1;
}

.fgroup.search-group input {
    min-width: 250px;
    width: 100%;
}

.fgroup select:focus,
.fgroup input:focus {
    outline: none;
    border-color: var(--accent);
}

.result-count {
    display: flex;
    align-items: flex-end;
    padding-bottom: 8px;
    font-size: .85rem;
    color: var(--ink-2);
}

/* === Main Layout === */
.main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* === Table === */
.tablewrap {
    flex: 1;
    overflow: auto;
    padding: 0;
}

.loading-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--ink-2);
}

.loading-center p {
    margin-top: 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: .9rem;
}

thead {
    position: sticky;
    top: 0;
    background: var(--panel);
    z-index: 1;
}

th {
    text-align: left;
    padding: 12px 16px;
    font-weight: 500;
    color: var(--ink-2);
    border-bottom: 1px solid var(--line);
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--line-2);
}

tr {
    cursor: pointer;
    transition: background .1s;
}

tr:hover {
    background: var(--bg);
}

tr.selected {
    background: rgba(35, 170, 225, .15);
}

.part-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}

.part-cell img {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    object-fit: cover;
    background: var(--bg);
}

.part-num {
    font-weight: 500;
    color: var(--accent);
}

.cat-badge {
    font-size: .7rem;
    background: var(--bg);
    padding: 2px 8px;
    border-radius: 10px;
    color: var(--ink-2);
}

/* === Preview Panel === */
.preview {
    width: 420px;
    border-left: 1px solid var(--line);
    background: var(--panel);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pv-head {
    padding: 16px;
    border-bottom: 1px solid var(--line);
}

.pv-head .lab {
    font-size: .75rem;
    color: var(--ink-2);
    margin-bottom: 4px;
}

.pv-head h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--ink);
}

.pv-head .desc {
    font-size: .9rem;
    color: var(--ink-2);
}

.pv-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 12px;
    font-size: .8rem;
}

.pv-meta dt {
    color: var(--ink-2);
}

.pv-meta dd {
    color: var(--ink);
    font-weight: 500;
    margin: 0;
}

.pv-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.pv-frame {
    flex: 1;
    position: relative;
    background: var(--bg);
    min-height: 300px;
}

.pv-frame iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.pv-frame img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.pv-empty {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-2);
    text-align: center;
    padding: 20px;
}

/* === Pagination === */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 20px;
    border-top: 1px solid var(--line);
    background: var(--panel);
}

.pagination button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    font-size: .9rem;
    cursor: pointer;
    transition: all .15s;
}

.pagination button:hover:not(:disabled) {
    background: var(--bg);
    border-color: var(--ink-2);
}

.pagination button:disabled {
    opacity: .4;
    cursor: not-allowed;
}

.pagination button.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.pagination button svg {
    width: 16px;
    height: 16px;
}

.pagination .page-info {
    font-size: .85rem;
    color: var(--ink-2);
    margin: 0 8px;
}

.pagination .ellipsis {
    color: var(--ink-2);
    padding: 0 4px;
}

/* === Blazor Error UI === */
#blazor-error-ui {
    background: var(--bad);
    color: white;
    padding: 1rem;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: none;
}

#blazor-error-ui .reload {
    color: white;
    margin-left: 8px;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    margin-left: 16px;
}

/* === Grouped Table Rows === */
.grp-main {
    background: var(--panel);
}

.grp-sub {
    background: var(--bg);
}

.grp-sub .part-cell.sub {
    padding-left: 20px;
}

.grp-sub .part-num {
    color: var(--ink-2);
    font-weight: 400;
}

.expand-cell {
    position: relative;
    width: 60px;
    padding: 8px !important;
}

.expand-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px 4px 6px;
    border: none;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    border-radius: 14px;
    transition: all .15s;
    font-size: .75rem;
    font-weight: 600;
}

.expand-btn:hover {
    background: var(--accent-dark);
}

.expand-btn svg {
    width: 12px;
    height: 12px;
    transition: transform .2s;
}

.expand-btn.expanded {
    background: var(--accent-dark);
}

.expand-btn.expanded svg {
    transform: rotate(90deg);
}

/* === Image Lightbox === */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    cursor: pointer;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .5);
}

.lightbox .close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, .1);
    border: none;
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s;
}

.lightbox .close-btn:hover {
    background: rgba(255, 255, 255, .2);
}

.lightbox .close-btn svg {
    width: 24px;
    height: 24px;
}

.part-cell img {
    cursor: pointer;
    transition: transform .15s, box-shadow .15s;
}

.part-cell img:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .3);
}

/* === Responsive === */
@media (max-width: 900px) {
    .preview {
        display: none;
    }

    .filters {
        padding: 10px;
    }

    .fgroup select,
    .fgroup input {
        min-width: 120px;
    }

    header {
        flex-wrap: wrap;
        gap: 10px;
    }

    .user-info {
        order: 10;
        width: 100%;
        justify-content: flex-end;
    }
}