:root {
    --bg: #f3f4f6;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --border: #d8dde6;
    --text: #111827;
    --muted: #667085;
    --primary: #1f4b99;
    --primary-dark: #163b7b;
    --danger: #b42318;
    --success: #027a48;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
    --radius: 18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: "Trebuchet MS", "Segoe UI", sans-serif; }
body.modal-open { overflow: hidden; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
code { font-family: "Courier New", monospace; font-size: 0.92em; }
.icon {
    width: 18px;
    height: 18px;
    display: inline-block;
    flex: 0 0 18px;
    vertical-align: middle;
}

.admin-shell { min-height: 100vh; display: grid; grid-template-columns: 260px 1fr; }
.sidebar { background: #111827; color: #f9fafb; padding: 24px 18px; position: sticky; top: 0; height: 100vh; }
.sidebar-backdrop { display: none; }
.sidebar__brand { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
.sidebar__logo { width: 42px; height: 42px; border-radius: 12px; background: #e5e7eb; color: #111827; display: grid; place-items: center; font-weight: 800; }
.sidebar__title { font-size: 18px; font-weight: 700; }
.sidebar__subtitle { color: #9ca3af; font-size: 13px; }
.sidebar__nav { display: grid; gap: 8px; }
.nav-link { padding: 12px 14px; border-radius: 12px; color: #d1d5db; font-size: 15px; display: flex; align-items: center; gap: 12px; }
.nav-link:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-link.is-active { background: #f9fafb; color: #111827; font-weight: 700; }

.content-shell { min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 22px 28px; }
.topbar__meta { display: flex; align-items: center; gap: 16px; margin-left: auto; }
.topbar__user { text-align: right; }
.topbar__name { font-weight: 700; }
.topbar__role { color: var(--muted); font-size: 13px; text-transform: uppercase; }
.menu-toggle { display: none; border: 1px solid var(--border); background: var(--surface); border-radius: 12px; padding: 10px 14px; align-items: center; gap: 8px; }
.menu-toggle__label { display: inline; }

.page { padding: 0 28px 32px; }
.page-head { margin-bottom: 24px; }
.page-head--split { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.page-head h1 { margin: 0 0 8px; font-size: 30px; }
.page-head p { margin: 0; color: var(--muted); }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card, .card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.stat-card { padding: 22px; }
.stat-card__label { color: var(--muted); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.stat-card__value { font-size: 34px; font-weight: 800; }

.card { padding: 22px; }
.card--narrow { max-width: 760px; }
.card + .card,
.card + .stack,
.card + .entity-grid,
.page > .stack + .stack,
.page > .card + .stack {
    margin-top: 20px;
}
.card__head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.card__head h2, .subsection h3 { margin: 0; }
.subsection { margin-top: 20px; }

.grid-two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.stack { display: grid; gap: 14px; }
.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.form-grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 18px;
    align-items: flex-end;
    flex-wrap: wrap;
}
.toolbar__field {
    display: grid;
    gap: 8px;
    min-width: 0;
}
.toolbar__field--search {
    flex: 1 1 320px;
}
.toolbar__label {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.2;
}
.toolbar__actions {
    display: flex;
    align-items: flex-end;
}
.inline-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.inline-actions--spread {
    width: 100%;
}
.inline-actions__end {
    margin-left: auto;
}
.table-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
    color: var(--muted);
    font-size: 14px;
}
.table-meta__summary strong { color: var(--text); }

.field { display: grid; gap: 8px; }
.field span, .muted { color: var(--muted); font-size: 14px; }
.input, input, textarea, select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-soft);
    padding: 12px 14px;
    color: var(--text);
    font: inherit;
}
textarea { resize: vertical; min-height: 96px; }
.input--compact { width: 180px; }
.checkbox { display: inline-flex; align-items: center; gap: 8px; color: var(--text); }

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    padding: 11px 16px;
    font: inherit;
    cursor: pointer;
}
.button:hover { border-color: #b9c2d0; }
.button--primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.button--primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.button--excel {
    background: #1d6f42;
    border-color: #1d6f42;
    color: #fff;
}
.button--excel:hover {
    background: #165936;
    border-color: #165936;
}
.button--danger { background: #fff5f4; border-color: #f3c4c0; color: var(--danger); }
.button--danger-ghost {
    background: #fff5f4;
    border-color: #f3c4c0;
    color: var(--danger);
}
.button--danger-ghost:hover {
    background: #fee4e2;
    border-color: #f0a9a1;
}
.button--ghost { background: transparent; }
.button--icon { width: 42px; height: 42px; padding: 0; }
.button:disabled {
    pointer-events: none;
    opacity: 0.5;
}
.button.is-disabled {
    pointer-events: none;
    opacity: 0.45;
}

.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 14px 12px; border-bottom: 1px solid #edf0f5; text-align: left; vertical-align: top; }
.table th { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
.table__actions { width: 64px; text-align: right; }

.list-card { border: 1px solid var(--border); border-radius: 14px; padding: 14px; background: var(--surface-soft); display: grid; gap: 12px; }
.list-card__title { font-weight: 700; }
.list-card__meta { color: var(--muted); font-size: 14px; }
.list-card--form { gap: 14px; }
.entity-grid {
    display: grid;
    gap: 16px;
}
.entity-grid--tariffs {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.entity-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 20px;
    display: grid;
    gap: 14px;
}
.entity-card__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}
.entity-card__title {
    margin: 0;
    font-size: 22px;
    line-height: 1.2;
}
.entity-card__subtitle {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 14px;
    word-break: break-word;
}
.entity-card__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.entity-card__description {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}
.entity-card__meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}
.entity-card__meta-item {
    display: grid;
    gap: 4px;
}
.entity-card__meta-item span {
    color: var(--muted);
    font-size: 13px;
}
.entity-card__meta-item strong {
    font-size: 14px;
    word-break: break-word;
}

.alert {
    border-radius: 14px;
    padding: 14px 16px;
    margin-bottom: 18px;
    border: 1px solid;
}
.alert--success { background: #ecfdf3; color: var(--success); border-color: #abefc6; }
.alert--error { background: #fef3f2; color: var(--danger); border-color: #fecdca; }

.modal[hidden] { display: none; }
.modal {
    position: fixed;
    inset: 0;
    z-index: 40;
    display: grid;
    place-items: center;
    padding: 20px;
    overflow-y: auto;
    overscroll-behavior: contain;
}
.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(17, 24, 39, 0.4);
    backdrop-filter: blur(2px);
}
.modal__dialog {
    position: relative;
    width: min(560px, 100%);
    max-height: calc(100dvh - 40px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    box-shadow: 0 24px 64px rgba(15, 23, 42, 0.22);
    padding: 24px;
    display: grid;
    gap: 18px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.modal__dialog--wide {
    width: min(820px, 100%);
}
.modal__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}
.modal__head-content {
    display: grid;
    gap: 6px;
}
.modal__head h2 {
    margin: 0;
    font-size: 24px;
}
.modal__section {
    display: grid;
    gap: 14px;
    padding-top: 16px;
    border-top: 1px solid #edf0f5;
}
.modal__section-head {
    display: grid;
    gap: 4px;
}
.modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding-top: 18px;
    border-top: 1px solid #edf0f5;
}
.modal__label {
    font-size: 13px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.modal__note {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}
.user-summary {
    display: grid;
    gap: 14px;
    padding: 18px;
    border: 1px solid #e5eaf3;
    border-radius: 18px;
    background: var(--surface-soft);
}
.user-summary__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}
.user-summary__name {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.2;
}
.user-summary__username {
    margin-top: 4px;
    color: var(--muted);
    font-size: 14px;
}
.user-summary__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.user-summary__id {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 14px;
}
.status-pill {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
}
.status-pill.is-active {
    background: #ecfdf3;
    border-color: #abefc6;
    color: var(--success);
}
.status-pill.is-muted {
    color: var(--muted);
}
.status-pill.is-danger {
    background: #fef3f2;
    border-color: #fecdca;
    color: var(--danger);
}
.status-card {
    display: grid;
    gap: 6px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-soft);
}
.status-card--danger {
    background: #fef3f2;
    border-color: #fecdca;
}
.status-card__title {
    font-weight: 700;
}
.status-card__text {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}
.support-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(320px, 0.9fr);
    gap: 20px;
    align-items: start;
}
.support-layout__main,
.support-layout__side {
    display: grid;
    gap: 20px;
}
.support-card {
    padding: 24px;
}
.support-card__head {
    margin-bottom: 16px;
}
.support-card__head .muted {
    display: block;
    margin-top: 6px;
}
.user-summary--compact {
    gap: 16px;
}
.support-meta {
    display: grid;
    gap: 14px;
}
.support-meta__item {
    display: grid;
    gap: 4px;
}
.support-meta__item span {
    color: var(--muted);
    font-size: 13px;
}
.support-meta__item strong {
    font-size: 14px;
    word-break: break-word;
}
.support-sidebar-actions {
    margin-top: 16px;
}
.support-sidebar-actions .button {
    width: 100%;
}
.support-thread {
    display: grid;
    gap: 14px;
}
.support-message {
    display: grid;
    gap: 10px;
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--surface-soft);
    max-width: 88%;
}
.support-message--admin {
    background: #eef4ff;
    border-color: #c9d9fb;
    justify-self: end;
}
.support-message--user {
    justify-self: start;
}
.support-message__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
    font-size: 13px;
}
.support-message__body {
    white-space: pre-wrap;
    line-height: 1.55;
}
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 18px;
}
.pagination__pages {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}
.pagination__page,
.pagination__dots {
    min-width: 40px;
    height: 40px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-size: 14px;
}
.pagination__page.is-active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 700;
}
.pagination__dots {
    border-style: dashed;
    color: var(--muted);
}

.login-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card {
    width: min(420px, 100%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    box-shadow: var(--shadow);
    padding: 28px;
}
.login-card__header { margin-bottom: 18px; }
.login-card__logo {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    background: #e8eef9;
    color: var(--primary);
    margin-bottom: 14px;
}
.icon--lg {
    width: 24px;
    height: 24px;
    flex-basis: 24px;
}
.login-card__header h1 { margin: 0 0 6px; font-size: 28px; }
.login-card__header p { margin: 0; color: var(--muted); }

@media (max-width: 1080px) {
    .stats-grid,
    .grid-two,
    .form-grid { grid-template-columns: 1fr 1fr; }
    .entity-card__meta-grid { grid-template-columns: 1fr 1fr; }
    .support-layout { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
    .admin-shell { grid-template-columns: 1fr; }
    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: 260px;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
        z-index: 30;
    }
    .sidebar.is-open { transform: translateX(0); }
    .sidebar-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        border: 0;
        padding: 0;
        margin: 0;
        background: rgba(17, 24, 39, 0.35);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
        z-index: 25;
    }
    body.sidebar-open .sidebar-backdrop {
        opacity: 1;
        pointer-events: auto;
    }
    .menu-toggle {
        display: inline-flex;
        width: 44px;
        height: 44px;
        padding: 0;
        justify-content: center;
        flex: 0 0 44px;
    }
    .menu-toggle__label { display: none; }
    .page,
    .topbar { padding-left: 18px; padding-right: 18px; }
    .topbar {
        display: grid;
        grid-template-columns: auto minmax(0, 1fr);
        gap: 12px;
        align-items: start;
    }
    .topbar__meta {
        min-width: 0;
        margin-left: 0;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 12px;
        align-items: start;
    }
    .topbar__user {
        min-width: 0;
        text-align: left;
        align-self: center;
    }
    .topbar__name {
        font-size: 15px;
        line-height: 1.2;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .topbar__role {
        font-size: 12px;
        line-height: 1.1;
    }
    .stats-grid,
    .grid-two,
    .form-grid,
    .page-head--split { grid-template-columns: 1fr; display: grid; }
    .entity-card__meta-grid { grid-template-columns: 1fr; }
    .toolbar,
    .toolbar__actions { flex-direction: column; }
    .toolbar__field,
    .toolbar__field--search,
    .toolbar__actions {
        width: 100%;
    }
    .toolbar__actions .button,
    .input--compact {
        width: 100%;
    }
    .table-meta,
    .pagination { flex-direction: column; align-items: stretch; }
    .pagination__pages { justify-content: flex-start; }
    .modal {
        padding: 12px;
        align-items: start;
    }
    .modal__dialog {
        max-height: calc(100dvh - 24px);
        padding: 18px;
    }
    .user-summary {
        padding: 16px;
    }
    .user-summary__top {
        display: grid;
    }
    .support-card {
        padding: 18px;
    }
    .support-message {
        max-width: 100%;
    }
}

@media (max-width: 640px) {
    .page-head h1 { font-size: 24px; }
    .card { padding: 18px; }
    .table-wrap { overflow: visible; }
    .table thead { display: none; }
    .table,
    .table tbody { display: grid; gap: 12px; }
    .table tr {
        display: grid;
        gap: 10px;
        border: 1px solid #edf0f5;
        border-radius: 16px;
        padding: 14px;
        background: var(--surface-soft);
    }
    .table td {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 14px;
        padding: 0;
        border: 0;
        font-size: 14px;
    }
    .table td::before {
        content: attr(data-label);
        color: var(--muted);
        font-size: 12px;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        flex: 0 0 96px;
    }
    .table td code {
        word-break: break-all;
        text-align: right;
    }
    .table__actions {
        width: auto;
        justify-content: flex-end;
    }
    .table__actions::before { display: none; }
}