:root {
    --bg: #f3f6fb;
    --panel: #ffffff;
    --panel-border: #d7dfef;
    --text: #182235;
    --muted: #637188;
    --primary: #1d5cff;
    --primary-soft: #eef3ff;
    --success: #1f8a4d;
    --success-bg: #eaf7ef;
    --danger: #c0392b;
    --danger-bg: #fdecea;
    --shadow: 0 12px 36px rgba(24, 34, 53, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

a {
    color: var(--primary);
    text-decoration: none;
}

.guest-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.guest-shell {
    width: 100%;
    max-width: 460px;
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
}

.sidebar {
    background: #0f172a;
    color: #f8fbff;
    padding: 28px 22px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.brand {
    font-size: 24px;
    font-weight: 700;
}

.sidebar-caption {
    margin-top: 10px;
    color: #b9c5da;
    line-height: 1.5;
}

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

.nav-link {
    display: block;
    padding: 12px 14px;
    border-radius: 12px;
    color: #e5edfa;
    transition: background 0.2s ease;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
}

.content-shell {
    padding: 24px 28px 40px;
}

.topbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 24px;
}

.page-title {
    margin: 0;
    font-size: 28px;
}

.page-subtitle {
    margin-top: 6px;
    color: var(--muted);
}

.topbar-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.user-chip {
    background: var(--panel);
    padding: 10px 14px;
    border-radius: 14px;
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow);
}

.user-chip-label {
    display: block;
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 4px;
}

.page-content {
    display: grid;
    gap: 20px;
}

.card,
.panel {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.card {
    padding: 22px;
}

.panel-header,
.panel-body,
.panel-footer {
    padding: 18px 22px;
}

.panel-header + .panel-body,
.panel-body + .panel-footer {
    border-top: 1px solid var(--panel-border);
}

.panel-title {
    margin: 0;
    font-size: 20px;
}

.grid {
    display: grid;
    gap: 18px;
}

.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.section-title {
    margin: 0;
    font-size: 22px;
}

.section-subtitle {
    margin: 6px 0 0;
    color: var(--muted);
}

.btn,
button,
input[type="submit"] {
    border: 0;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    padding: 11px 16px;
    transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.btn:hover,
button:hover,
input[type="submit"]:hover {
    transform: translateY(-1px);
}

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

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--panel-border);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-secondary {
    background: #edf2ff;
    color: #1b3e9b;
}

.btn-sm {
    padding: 8px 12px;
    font-size: 13px;
}

.btn-row,
.inline-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

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

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: #c8e6d3;
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: #f4c5bf;
}

.form-grid {
    display: grid;
    gap: 16px;
}

.form-group {
    display: grid;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
}

.form-help {
    color: var(--muted);
    font-size: 13px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--panel-border);
    background: #fff;
    color: var(--text);
    font: inherit;
}

textarea {
    min-height: 120px;
    resize: vertical;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--panel-border);
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--muted);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}

.badge-success {
    background: #eaf7ef;
    color: #14713d;
}

.badge-muted {
    background: #eef2f8;
    color: #516175;
}

.dashboard-search {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.dashboard-search input {
    flex: 1 1 280px;
}

.category-block {
    display: grid;
    gap: 16px;
}

.subcategory-block {
    background: #f8fbff;
    border: 1px solid #dce5f4;
    border-radius: 18px;
    padding: 18px;
}

.subcategory-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 14px;
}

.subcategory-title {
    margin: 0;
    font-size: 18px;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
}

.link-card {
    background: #fff;
    border: 1px solid #dce5f4;
    border-radius: 16px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 240px;
}

.link-card.dragging {
    opacity: 0.45;
}

.link-card-header {
    display: flex;
    gap: 12px;
    align-items: center;
}

.favicon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    object-fit: cover;
    border: 1px solid #dce5f4;
    background: #eef3ff;
}

.favicon-fallback {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: #eef3ff;
    color: #24449b;
    font-weight: 700;
    border: 1px solid #dce5f4;
}

.link-title {
    margin: 0;
    font-size: 17px;
}

.link-url {
    font-size: 13px;
    color: var(--muted);
    word-break: break-all;
}

.link-description {
    color: #304057;
    line-height: 1.5;
    flex: 1;
}

.card-footer-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.empty-state {
    padding: 24px;
    border: 1px dashed #c4d0e6;
    border-radius: 16px;
    color: var(--muted);
    background: #fbfdff;
}

.drag-help {
    color: var(--muted);
    font-size: 13px;
}

.hidden {
    display: none !important;
}

@media (max-width: 1100px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        gap: 18px;
    }

    .nav-list {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 760px) {
    .content-shell {
        padding: 18px;
    }

    .topbar {
        flex-direction: column;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}