:root {
    color-scheme: light;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --navy: #101114;
    --navy-2: #181a1f;
    --blue: #2563eb;
    --blue-dark: #1d4ed8;
    --ink: #17191f;
    --muted: #667085;
    --line: #e4e7ec;
    --surface: #ffffff;
    --canvas: #f7f8fa;
    --danger: #b42318;
    --design-column-bg: #f7f7f6;
    --assembly-column-bg: #eff6ff;
    --header-text: #ffffff;
    --ui-header-height: 54px;
    --ui-header-side-padding: 22px;
    --ui-header-title-size: 21px;
    --ui-status-font-size: 13px;
    --ui-clock-size: 34px;
    --ui-date-font-size: 14px;
    --ui-board-padding: 16px;
    --ui-column-gap: 16px;
    --ui-column-radius: 14px;
    --ui-column-header-height: 66px;
    --ui-column-title-size: 24px;
    --ui-list-padding: 14px;
    --ui-row-gap: 11px;
    --ui-card-height: 76px;
    --ui-card-padding: 16px;
    --ui-card-radius: 12px;
    --ui-entry-font-size: 22px;
    --ui-dot-size: 32px;
    --ui-control-size: 36px;
    --ui-drag-width: 26px;
    --shadow-sm: 0 3px 12px rgba(16, 24, 40, 0.07);
    --shadow-md: 0 18px 48px rgba(16, 24, 40, 0.14);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body { margin: 0; background: var(--canvas); color: var(--ink); }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.48; }
svg { display: block; }

/* Cabecera fina */
.topbar {
    min-height: var(--ui-header-height);
    height: var(--ui-header-height);
    padding: 4px var(--ui-header-side-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    background: linear-gradient(100deg, var(--navy), var(--navy-2));
    color: var(--header-text);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
    position: relative;
    z-index: 20;
}
.brand-area, .user-area, .viewer-status-area { display: flex; align-items: center; }
.brand-area { gap: 18px; min-width: 0; }
.brand-area strong {
    font-size: var(--ui-header-title-size);
    min-width: 0;
    max-width: min(52vw, 760px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: -0.025em;
}
.brand-mark { width: 28px; height: 28px; color: #5aa0ff; flex: 0 0 auto; }
.brand-mark svg { width: 100%; height: 100%; fill: currentColor; }
.connection {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--header-text);
    opacity: 0.78;
    font-size: var(--ui-status-font-size);
    white-space: nowrap;
}
.connection::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #f59e0b;
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.12);
}
.connection.online::before { background: #49d17d; box-shadow: 0 0 0 3px rgba(73, 209, 125, 0.12); }
.connection.offline::before { background: #f59e0b; }
.user-area { gap: 10px; }
.role-badge {
    padding: 4px 9px;
    border: 1px solid rgba(255,255,255,0.22);
    border-radius: 999px;
    color: var(--header-text);
    opacity: 0.82;
    font-size: 0.74rem;
}
.topbar-link, .link-button {
    color: var(--header-text);
    text-decoration: none;
    font-weight: 650;
    font-size: 0.82rem;
}
.topbar-link { padding: 6px 8px; border-radius: 7px; }
.topbar-link:hover { background: rgba(255,255,255,0.09); }
.link-button { border: 0; padding: 6px 3px; background: transparent; opacity: 0.78; }
.link-button:hover { opacity: 1; }

.viewer-view .topbar { min-height: var(--ui-header-height); height: var(--ui-header-height); padding: 3px var(--ui-header-side-padding); }
.viewer-view .brand-area { gap: 13px; }
.viewer-view .brand-area strong { font-size: var(--ui-header-title-size); }
.viewer-view .connection { font-size: var(--ui-status-font-size); }
.viewer-status-area { gap: 12px; white-space: nowrap; }
.viewer-time {
    font-size: var(--ui-clock-size);
    font-weight: 720;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.04em;
}
.viewer-divider { width: 1px; height: 24px; background: currentColor; opacity: 0.28; }
.viewer-date { font-size: var(--ui-date-font-size); color: var(--header-text); opacity: 0.82; font-weight: 520; }
.viewer-logout-form { margin: 0; }
.viewer-logout {
    border: 0;
    background: transparent;
    color: var(--header-text);
    opacity: 0.34;
    font-size: 0.68rem;
    padding: 5px 0 5px 4px;
}
.viewer-logout:hover { color: var(--header-text); opacity: 1; }

/* Tablero */
.board {
    min-height: calc(100vh - var(--ui-header-height));
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--ui-column-gap);
    padding: var(--ui-board-padding);
    background: #fafafa;
}
.viewer-view .board { height: calc(100vh - var(--ui-header-height)); min-height: 0; overflow: hidden; gap: var(--ui-column-gap); padding: var(--ui-board-padding); }
.kanban-column {
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(16, 24, 40, 0.08);
    border-radius: var(--ui-column-radius);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.45);
}
.design-column { background: var(--design-column-bg); }
.assembly-column { background: var(--assembly-column-bg); }
.column-header {
    min-height: var(--ui-column-header-height);
    height: var(--ui-column-header-height);
    padding: 0 var(--ui-card-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    background: rgba(255, 255, 255, 0.46);
    border-bottom: 1px solid rgba(16, 24, 40, 0.035);
}
.column-header h1 {
    margin: 0;
    font-size: var(--ui-column-title-size);
    line-height: 1;
    letter-spacing: -0.025em;
    color: #181b22;
}
.viewer-view .column-header { min-height: var(--ui-column-header-height); height: var(--ui-column-header-height); padding: 0 var(--ui-card-padding); }
.viewer-view .column-header h1 { font-size: var(--ui-column-title-size); }
.add-button {
    width: var(--ui-control-size);
    height: var(--ui-control-size);
    display: grid;
    place-items: center;
    border: 1px solid #d6dae1;
    border-radius: 9px;
    background: rgba(255,255,255,0.82);
    color: #343842;
    font-size: 1.45rem;
    line-height: 1;
    box-shadow: 0 2px 7px rgba(16, 24, 40, 0.05);
}
.add-button:hover { border-color: #aab2bf; background: #fff; transform: translateY(-1px); }

.card-list {
    flex: 1;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    gap: var(--ui-row-gap);
    padding: var(--ui-list-padding);
    overflow: auto;
    transition: background 120ms ease, outline-color 120ms ease;
}
.viewer-view .card-list { overflow: hidden; gap: var(--ui-row-gap); padding: var(--ui-list-padding); }
.card-list.drag-target {
    outline: 2px dashed rgba(37, 99, 235, 0.45);
    outline-offset: -7px;
    background-color: rgba(255,255,255,0.22);
}

.kanban-card {
    --client-color: #64748b;
    position: relative;
    min-height: var(--ui-card-height);
    height: var(--ui-card-height);
    flex: 0 0 var(--ui-card-height);
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--ui-dot-size);
    align-items: center;
    gap: max(6px, calc(var(--ui-card-padding) * 0.65));
    padding: 0 var(--ui-card-padding);
    overflow: hidden;
    border: 1px solid rgba(16, 24, 40, 0.075);
    border-radius: var(--ui-card-radius);
    background: rgba(255,255,255,0.96);
    box-shadow: var(--shadow-sm);
    user-select: none;
    transition: transform 130ms ease, box-shadow 130ms ease, opacity 130ms ease;
}
.editor-view .kanban-card {
    grid-template-columns: var(--ui-drag-width) minmax(0, 1fr) var(--ui-control-size) var(--ui-dot-size);
    padding-left: max(3px, calc(var(--ui-card-padding) * 0.42));
}
.kanban-card.can-drag { cursor: grab; -webkit-user-drag: element; }
.kanban-card.can-drag:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(16, 24, 40, 0.11); }
.kanban-card.dragging { opacity: 0.3; cursor: grabbing; }
body.board-dragging, body.board-dragging * { cursor: grabbing !important; }

.card-grip {
    width: var(--ui-drag-width);
    height: 100%;
    display: grid;
    grid-template-columns: repeat(2, 4px);
    place-content: center;
    gap: 4px;
    color: #c3c7ce;
}
.card-grip i { width: 4px; height: 4px; border-radius: 50%; background: currentColor; }
.card-title-viewport {
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    padding: 4px 0;
    -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 15px), transparent 100%);
    mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 15px), transparent 100%);
}
.card-title-track {
    display: inline-block;
    min-width: max-content;
    padding: 0 12px;
    font-size: var(--ui-entry-font-size);
    font-weight: 780;
    line-height: 1.15;
    letter-spacing: -0.018em;
    text-transform: uppercase;
    will-change: transform;
}
.viewer-view .card-title-track {
    font-size: var(--ui-entry-font-size);
    font-weight: 750;
}
.card-title-viewport.is-overflowing .card-title-track {
    animation: title-marquee var(--marquee-duration, 8s) ease-in-out 1.2s infinite alternate;
}
@keyframes title-marquee {
    0%, 14% { transform: translateX(0); }
    86%, 100% { transform: translateX(calc(var(--marquee-distance, 0px) * -1)); }
}
.edit-button {
    width: var(--ui-control-size);
    height: var(--ui-control-size);
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: #5f6672;
}
.edit-button:hover { background: #f0f2f5; color: #20242c; }
.edit-button svg { width: calc(var(--ui-control-size) * 0.56); height: calc(var(--ui-control-size) * 0.56); fill: currentColor; }
.client-dot {
    width: var(--ui-dot-size);
    height: var(--ui-dot-size);
    justify-self: end;
    border-radius: 50%;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.08), 0 2px 5px rgba(16,24,40,0.08);
}
.viewer-view .client-dot { width: var(--ui-dot-size); height: var(--ui-dot-size); }
.empty-state {
    min-height: 92px;
    display: grid;
    place-items: center;
    border: 1px dashed rgba(71,84,103,0.24);
    border-radius: 11px;
    color: rgba(71,84,103,0.7);
    background: rgba(255,255,255,0.18);
    font-size: 0.9rem;
}
.viewer-view .empty-state { font-size: 1.1rem; }

/* Los tamaños del visor se gestionan desde Administración.
   data-density se conserva para compatibilidad, pero no modifica los valores elegidos. */
.viewer-view .kanban-card {
    min-height: var(--ui-card-height);
    height: var(--ui-card-height);
    padding: 0 var(--ui-card-padding);
    border-radius: var(--ui-card-radius);
}
.viewer-view .board[data-density] .card-list { gap: var(--ui-row-gap); padding: var(--ui-list-padding); }
.viewer-view .board[data-density] .card-title-track { font-size: var(--ui-entry-font-size); }
.viewer-view .board[data-density] .client-dot { width: var(--ui-dot-size); height: var(--ui-dot-size); }

/* Diálogo de tareas */
.item-dialog {
    width: min(560px, calc(100% - 30px));
    padding: 0;
    border: 1px solid #d8dde5;
    border-radius: 16px;
    background: #fff;
    color: var(--ink);
    box-shadow: var(--shadow-md);
}
.item-dialog::backdrop { background: rgba(10, 14, 22, 0.48); backdrop-filter: blur(2px); }
.item-dialog form { padding: 24px; }
.dialog-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.dialog-header h2 { margin: 2px 0 0; font-size: 1.45rem; letter-spacing: -0.025em; }
.dialog-eyebrow { color: var(--blue-dark); font-size: 0.74rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; }
.icon-button {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border: 1px solid #d8dde5;
    border-radius: 8px;
    background: #fff;
    color: #596171;
    font-size: 1.35rem;
}
.icon-button:hover { background: #f7f8fa; }
label { display: grid; gap: 7px; margin: 0 0 15px; color: #344054; font-size: 0.84rem; font-weight: 700; }
input, select {
    width: 100%;
    min-height: 44px;
    padding: 9px 11px;
    border: 1px solid #cfd5df;
    border-radius: 9px;
    background: #fff;
    color: #1d2939;
}
input:focus, select:focus { outline: 3px solid rgba(37,99,235,0.13); border-color: var(--blue); }
.dialog-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 12px; }
.dialog-actions { display: flex; align-items: center; gap: 10px; margin-top: 18px; }
.dialog-actions-split { justify-content: space-between; }
.dialog-actions-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.primary-button, .secondary-button, .danger-button {
    min-height: 40px;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: 740;
}
.primary-button { border: 1px solid var(--blue-dark); background: var(--blue-dark); color: #fff; }
.primary-button:hover { background: #183eae; }
.secondary-button { border: 1px solid #cdd3dc; background: #fff; color: #344054; }
.secondary-button:hover { background: #f8f9fb; }
.danger-button { border: 1px solid #e5aaa4; background: #fff; color: var(--danger); }
.danger-button:hover { background: #fff4f3; }
.full-width { width: 100%; }
.form-error { min-height: 1.2em; margin: 10px 0 0; color: var(--danger); font-weight: 650; }
.toast {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 100;
    max-width: min(420px, calc(100vw - 36px));
    padding: 11px 15px;
    border-radius: 9px;
    background: #20242d;
    color: #fff;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
    transition: 180ms ease;
}
.toast.visible { opacity: 1; transform: translateY(0); }
.toast.error { background: #8c1d18; }

/* Login */
.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background: radial-gradient(circle at 15% 20%, rgba(37,99,235,0.12), transparent 36%), linear-gradient(145deg, #eef2f7, #fafafa);
}
.login-card {
    width: min(430px, 100%);
    padding: 32px;
    border: 1px solid rgba(203,213,225,0.78);
    border-radius: 16px;
    background: rgba(255,255,255,0.97);
    box-shadow: 0 22px 65px rgba(16,24,40,0.13);
}
.login-card h1 { margin: 0 0 8px; font-size: 1.75rem; letter-spacing: -0.03em; }
.login-card > p, .login-note { color: var(--muted); }
.login-note { margin: 20px 0 0; font-size: 0.88rem; }

/* Administración */
.admin-page { background: #f4f6f9; }
.admin-shell {
    width: min(1240px, calc(100% - 32px));
    margin: 26px auto 60px;
    display: grid;
    gap: 20px;
}
.admin-tabs {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 5px;
    width: fit-content;
    border: 1px solid #dce2ea;
    border-radius: 11px;
    background: #fff;
    box-shadow: var(--shadow-sm);
}
.admin-tab {
    padding: 8px 13px;
    border-radius: 7px;
    color: #475467;
    text-decoration: none;
    font-weight: 720;
    font-size: 0.88rem;
}
.admin-tab.is-active { background: #eaf1ff; color: #1d4ed8; }
.admin-panel {
    padding: 24px;
    border: 1px solid #dde3eb;
    border-radius: 15px;
    background: #fff;
    box-shadow: var(--shadow-sm);
}
.admin-panel h1, .admin-panel h2 { margin: 0 0 8px; letter-spacing: -0.025em; }
.admin-panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; }
.admin-panel-heading p, .form-help, .muted-text { color: #667085; }
.admin-alert { padding: 12px 15px; border: 1px solid; border-radius: 9px; font-weight: 670; }
.admin-alert.is-success { background: #edf9f1; border-color: #9bd5ad; color: #155b2d; }
.admin-alert.is-error { background: #fff0ef; border-color: #e0a4a0; color: #8c1d18; }
.users-list, .clients-list { display: grid; gap: 12px; margin-top: 21px; }
.user-row {
    display: grid;
    grid-template-columns: minmax(160px, 0.7fr) minmax(280px, 2fr) auto;
    gap: 18px;
    align-items: center;
    padding: 15px;
    border: 1px solid #e1e6ed;
    border-radius: 11px;
    background: #fbfcfd;
}
.user-summary { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; }
.account-role { display: inline-flex; align-items: center; padding: 4px 9px; border-radius: 999px; font-size: 0.74rem; font-weight: 780; }
.account-role.is-creative { background: #e6edff; color: #1738aa; }
.account-role.is-viewer { background: #e8f5ec; color: #176232; }
.user-access { min-width: 0; }
.token-field { margin: 0 0 9px; font-size: 0.8rem; }
.token-field input { min-height: 38px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.82rem; }
.compact-actions, .user-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.user-actions { justify-content: flex-end; }
.user-actions form { margin: 0; }
.small-button { min-height: 34px; padding: 6px 10px; font-size: 0.8rem; }
.legacy-token-note { padding: 10px 12px; border-left: 4px solid #d99b24; background: #fff8e9; color: #6d4a07; font-size: 0.88rem; }
.create-user-panel, .create-client-panel { max-width: 800px; }
.admin-form { margin-top: 18px; }
.form-help { margin: 4px 0 18px; font-size: 0.88rem; }
.client-admin-row {
    display: grid;
    grid-template-columns: 54px minmax(145px, 1fr) minmax(190px, 1.4fr) 92px 88px auto;
    gap: 10px;
    align-items: end;
    padding: 14px;
    border: 1px solid #e1e6ed;
    border-radius: 11px;
    background: #fbfcfd;
}
.client-admin-row label { margin: 0; font-size: 0.74rem; }
.client-color-preview { width: 44px; height: 44px; align-self: end; border: 1px solid rgba(16,24,40,0.12); border-radius: 9px; box-shadow: inset 0 0 0 2px rgba(255,255,255,0.3); }
.client-admin-row input { min-height: 42px; }
.client-admin-row input[type="color"] { padding: 4px; }
.client-admin-actions { display: flex; align-items: center; gap: 7px; min-height: 42px; }
.client-usage { display: inline-flex; align-items: center; min-height: 31px; padding: 5px 9px; border-radius: 999px; background: #eef2f6; color: #526074; font-size: 0.74rem; font-weight: 720; white-space: nowrap; }
.admin-form-grid { display: grid; grid-template-columns: minmax(160px,1fr) minmax(200px,1.3fr) 120px 100px; gap: 12px; align-items: end; }
.admin-form-grid label { margin: 0; }
.admin-form-actions { margin-top: 16px; }

/* Apariencia */
.appearance-form { margin-top: 22px; }
.appearance-board-settings {
    display: grid;
    grid-template-columns: minmax(260px, 0.85fr) minmax(360px, 1.4fr);
    gap: 18px;
    align-items: stretch;
    margin-bottom: 18px;
}
.appearance-board-settings > label { margin: 0; }
.appearance-header-choice { padding: 15px; }
.header-preview {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 10px 16px;
    overflow: hidden;
    border: 1px solid rgba(16,24,40,0.1);
    border-radius: 10px;
    transition: background-color 140ms ease, color 140ms ease;
}
.header-preview strong {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 1.05rem;
}
.header-preview span { display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; opacity: 0.82; font-size: 0.78rem; }
.header-preview i { width: 8px; height: 8px; border-radius: 50%; background: #49d17d; box-shadow: 0 0 0 3px rgba(73,209,125,0.15); }
.appearance-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.appearance-choice {
    margin: 0;
    padding: 15px;
    border: 1px solid #dde3eb;
    border-radius: 13px;
    background: #fafbfc;
}
.appearance-label { font-size: 0.9rem; color: #344054; }
.appearance-preview {
    min-height: 190px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: 18px;
    border: 1px solid rgba(16,24,40,0.08);
    border-radius: 12px;
    transition: background-color 140ms ease;
}
.appearance-preview strong { font-size: 1.05rem; color: #1d2939; }
.appearance-sample-card {
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 0 18px;
    border: 1px solid rgba(16,24,40,0.08);
    border-radius: 10px;
    background: #fff;
    box-shadow: var(--shadow-sm);
    font-size: 1rem;
}
.appearance-sample-card i { width: 26px; height: 26px; border-radius: 50%; background: #ef2020; }
.color-control { display: flex; align-items: center; gap: 12px; }
.color-control input[type="color"] { width: 64px; min-height: 42px; padding: 4px; }
.color-control code { padding: 7px 9px; border-radius: 7px; background: #edf0f4; color: #475467; }
.appearance-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

/* Controles de tamaños */
.size-settings {
    margin-top: 24px;
    padding-top: 22px;
    border-top: 1px solid #e3e7ed;
}
.size-settings-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 16px;
}
.size-settings-heading h2 { margin: 0 0 6px; }
.size-settings-heading p { max-width: 760px; margin: 0; color: #667085; }
.size-mode-switch {
    display: inline-flex;
    flex: 0 0 auto;
    padding: 4px;
    border: 1px solid #d8dee7;
    border-radius: 10px;
    background: #f5f7fa;
}
.size-mode-switch button {
    min-width: 84px;
    padding: 7px 12px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: #526074;
    font-weight: 750;
}
.size-mode-switch button.is-active {
    background: #fff;
    color: #1d4ed8;
    box-shadow: 0 2px 8px rgba(16,24,40,0.08);
}
.size-mode-panel {
    padding: 18px;
    border: 1px solid #dce2ea;
    border-radius: 13px;
    background: #fafbfc;
}
.size-mode-intro {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 16px;
}
.size-mode-intro strong { font-size: 1rem; color: #1d2939; }
.size-mode-intro span { color: #667085; font-size: 0.88rem; }
.size-controls-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(230px, 1fr));
    gap: 10px;
}
.size-control {
    padding: 11px 12px;
    border: 1px solid #e1e6ed;
    border-radius: 10px;
    background: #fff;
}
.size-control > label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin: 0 0 8px;
    font-size: 0.78rem;
}
.size-control output {
    flex: 0 0 auto;
    padding: 2px 6px;
    border-radius: 6px;
    background: #eef2f6;
    color: #475467;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.72rem;
    font-weight: 650;
}
.size-control-inputs {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 72px;
    align-items: center;
    gap: 10px;
}
.size-control input[type="range"] {
    min-height: 24px;
    padding: 0;
    accent-color: var(--blue);
}
.size-control input[type="number"] {
    min-height: 34px;
    padding: 5px 7px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}
.size-live-preview {
    --preview-header-height: 44px;
    --preview-header-side-padding: 14px;
    --preview-header-title-size: 20px;
    --preview-status-font-size: 13px;
    --preview-clock-size: 34px;
    --preview-date-font-size: 14px;
    --preview-board-padding: 6px;
    --preview-column-gap: 6px;
    --preview-column-radius: 10px;
    --preview-column-header-height: 38px;
    --preview-column-title-size: 20px;
    --preview-list-padding: 4px;
    --preview-row-gap: 4px;
    --preview-card-height: 56px;
    --preview-card-padding: 10px;
    --preview-card-radius: 8px;
    --preview-entry-font-size: 25px;
    --preview-dot-size: 24px;
    --preview-control-size: 36px;
    --preview-drag-width: 26px;
    max-height: 420px;
    margin-top: 18px;
    overflow: auto;
    border: 1px solid #dce2ea;
    border-radius: 12px;
    background: #f6f7f9;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.6);
}
.size-preview-topbar {
    min-height: var(--preview-header-height);
    height: var(--preview-header-height);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 2px var(--preview-header-side-padding);
    overflow: hidden;
    background: #15171b;
    color: #fff;
}
.size-preview-topbar strong {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: var(--preview-header-title-size);
}
.size-preview-topbar span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--preview-status-font-size);
    opacity: 0.78;
    white-space: nowrap;
}
.size-preview-topbar span i { width: 7px; height: 7px; border-radius: 50%; background: #49d17d; }
.size-preview-topbar time {
    margin-left: auto;
    font-size: var(--preview-clock-size);
    line-height: 1;
    font-weight: 720;
}
.size-preview-board {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--preview-column-gap);
    padding: var(--preview-board-padding);
}
.size-preview-board > section {
    min-width: 0;
    overflow: hidden;
    border: 1px solid #e0e4ea;
    border-radius: var(--preview-column-radius);
    background: #eef3f8;
}
.size-preview-board > section:first-child { background: #f5f5f3; }
.size-preview-board header {
    min-height: var(--preview-column-header-height);
    height: var(--preview-column-header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--preview-card-padding);
    overflow: hidden;
    font-size: var(--preview-column-title-size);
    font-weight: 800;
}
.size-preview-board header button {
    width: var(--preview-control-size);
    height: var(--preview-control-size);
    border: 1px solid #d6dae1;
    border-radius: 7px;
    background: #fff;
    line-height: 1;
}
.size-preview-list {
    display: flex;
    flex-direction: column;
    gap: var(--preview-row-gap);
    padding: var(--preview-list-padding);
}
.size-preview-list article {
    min-width: 0;
    min-height: var(--preview-card-height);
    height: var(--preview-card-height);
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--preview-dot-size);
    align-items: center;
    gap: 7px;
    padding: 0 var(--preview-card-padding);
    overflow: hidden;
    border: 1px solid #e2e6eb;
    border-radius: var(--preview-card-radius);
    background: #fff;
    box-shadow: 0 2px 7px rgba(16,24,40,0.06);
}
.size-mode-panel[data-size-mode-panel="editor"] .size-preview-list article {
    grid-template-columns: var(--preview-drag-width) minmax(0, 1fr) var(--preview-control-size) var(--preview-dot-size);
    padding-left: max(3px, calc(var(--preview-card-padding) * 0.4));
}
.size-preview-list article > strong {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: var(--preview-entry-font-size);
    line-height: 1;
}
.size-preview-dot {
    width: var(--preview-dot-size);
    height: var(--preview-dot-size);
    justify-self: end;
    border-radius: 50%;
    background: #ef2020;
}
.size-preview-dot.is-blue { background: #2563eb; }
.size-preview-pencil {
    width: var(--preview-control-size);
    height: var(--preview-control-size);
    display: grid;
    place-items: center;
    color: #667085;
    font-size: calc(var(--preview-control-size) * 0.58);
}
.size-preview-grip {
    width: var(--preview-drag-width);
    overflow: hidden;
    color: #c3c7ce;
    font-size: 8px;
    line-height: 0.55;
    text-align: center;
    letter-spacing: 1px;
}

@media (prefers-reduced-motion: reduce) {
    .card-title-viewport.is-overflowing .card-title-track { animation: none; }
    .card-title-viewport.is-overflowing { text-overflow: ellipsis; }
}
@media (max-width: 1050px) {
    .size-controls-grid { grid-template-columns: repeat(2, minmax(220px, 1fr)); }
    .client-admin-row { grid-template-columns: 48px 1fr 1fr 90px; }
    .client-admin-actions { grid-column: 2 / -1; }
    .admin-form-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
    .user-row { grid-template-columns: 1fr; }
    .user-actions { justify-content: flex-start; }
    .board { grid-template-columns: 1fr; min-height: auto; }
    .viewer-view .board { height: auto; overflow: visible; }
    .kanban-column { min-height: 46vh; }
    .appearance-grid, .appearance-board-settings { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
    .topbar { height: auto; min-height: var(--ui-header-height); align-items: flex-start; flex-wrap: wrap; padding: 9px 12px; }
    .brand-area { flex-wrap: wrap; gap: 9px 14px; }
    .connection { width: 100%; }
    .editor-user-area { width: 100%; justify-content: flex-end; }
    .viewer-status-area { width: 100%; justify-content: flex-end; }
    .board { padding: 8px; gap: 8px; }
    .column-header { min-height: 56px; padding: 10px 12px; }
    .card-list { padding: 8px; }
    .editor-view .kanban-card { grid-template-columns: 22px minmax(0,1fr) 34px 32px; padding-right: 10px; }
    .client-dot { width: 28px; height: 28px; }
    .dialog-grid { grid-template-columns: 1fr; }
    .dialog-actions-split { align-items: stretch; flex-direction: column-reverse; }
    .dialog-actions-right { width: 100%; margin-left: 0; }
    .dialog-actions-right button, .dialog-actions-split > button { flex: 1; }
    .admin-shell { width: min(100% - 18px, 1240px); margin-top: 12px; }
    .admin-panel { padding: 16px; }
    .compact-actions > button, .user-actions form, .user-actions button { width: 100%; }
    .client-admin-row { grid-template-columns: 44px 1fr; }
    .client-admin-row > label { grid-column: 2; }
    .client-admin-actions { grid-column: 1 / -1; flex-wrap: wrap; }
    .admin-form-grid { grid-template-columns: 1fr; }
    .size-settings-heading, .size-mode-intro { flex-direction: column; }
    .size-mode-switch { width: 100%; }
    .size-mode-switch button { flex: 1; }
    .size-controls-grid { grid-template-columns: 1fr; }
    .size-preview-board { grid-template-columns: 1fr; }
    .appearance-actions { flex-direction: column; }
}