/* North UI components — reference implementation.
 * Plain CSS on top of north-tokens.css (semantic roles switch light/dark automatically).
 * Use as-is, or reproduce with Tailwind using the recipes on /product-ui/tailwind/.
 * Class prefix: .n-  ·  Modifiers: --variant  ·  State via native attributes ([disabled], [aria-*]) where possible.
 */

/* ------------------------------------------------------------------ shared */
.n-ui { font-family: var(--n-font-family-text); color: var(--n-text-body); font-size: 15px; line-height: 1.5; }
.n-ui *, .n-ui *::before, .n-ui *::after { box-sizing: border-box; }
.n-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.n-ico { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
:where(.n-btn, .n-input, .n-select, .n-check input, .n-radio input, .n-switch input, .n-tab, .n-chip, .n-page, .n-tree a, .n-menu__item, .n-accordion summary, .n-icon-btn):focus-visible {
  outline: var(--n-border-focus) solid var(--n-focus); outline-offset: 2px;
}

/* ------------------------------------------------------------------ buttons */
.n-btn {
  --h: var(--n-size-control-md); --px: 16px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: var(--h); padding: 0 var(--px); border-radius: var(--n-radius-sm);
  font: 500 15px/1 var(--n-font-family-text); white-space: nowrap; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; background: transparent; color: var(--n-text-heading);
  transition: background var(--n-motion-duration-fast) var(--n-motion-easing-standard), border-color var(--n-motion-duration-fast), color var(--n-motion-duration-fast), transform var(--n-motion-duration-instant);
  position: relative; user-select: none;
}
.n-btn:active:not([disabled], [aria-disabled="true"]) { transform: translateY(1px); }
.n-btn--sm { --h: var(--n-size-control-sm); --px: 12px; font-size: 13.5px; }
.n-btn--lg { --h: var(--n-size-control-lg); --px: 22px; font-size: 16px; }
.n-btn--primary { background: var(--n-action); color: var(--n-text-on-action); }
.n-btn--primary:hover { background: var(--n-action-hover); }
.n-btn--secondary { border-color: var(--n-border-ui); background: var(--n-surface-raised); }
.n-btn--secondary:hover { border-color: var(--n-text-caption); }
.n-btn--tertiary { color: var(--n-text-link); padding: 0 10px; }
.n-btn--tertiary:hover { background: color-mix(in srgb, var(--n-text-link) 10%, transparent); }
.n-btn--danger { background: var(--n-status-danger); color: var(--n-text-on-danger); }
.n-btn--danger:hover { background: color-mix(in srgb, var(--n-status-danger) 85%, #000); }
.n-btn--danger-secondary { border-color: color-mix(in srgb, var(--n-status-danger) 45%, transparent); color: var(--n-status-danger); background: var(--n-surface-raised); }
.n-btn--inverse { background: var(--n-text-heading); color: var(--n-bg-canvas); }
.n-btn[disabled], .n-btn[aria-disabled="true"] { opacity: var(--n-opacity-disabled); cursor: not-allowed; pointer-events: none; }
.n-btn[aria-busy="true"] { color: transparent !important; pointer-events: none; }
.n-btn[aria-busy="true"]::after { content: ""; position: absolute; width: 16px; height: 16px; border-radius: 50%; border: 2px solid currentColor; border-right-color: transparent; color: var(--n-text-on-action); animation: n-spin 700ms linear infinite; }
.n-btn--secondary[aria-busy="true"]::after, .n-btn--tertiary[aria-busy="true"]::after { color: var(--n-text-heading); }
.n-btn.is-done { background: var(--n-status-success); color: var(--n-text-on-danger); }
.n-btn .n-ico { width: 18px; height: 18px; }
.n-btn-group { display: inline-flex; }
.n-btn-group .n-btn { border-radius: 0; }
.n-btn-group .n-btn + .n-btn { margin-left: -1px; }
.n-btn-group .n-btn:first-child { border-radius: var(--n-radius-sm) 0 0 var(--n-radius-sm); }
.n-btn-group .n-btn:last-child { border-radius: 0 var(--n-radius-sm) var(--n-radius-sm) 0; }
.n-icon-btn { width: 40px; height: 40px; display: inline-grid; place-items: center; border-radius: var(--n-radius-sm); border: 1px solid transparent; background: transparent; color: var(--n-text-heading); cursor: pointer; transition: background var(--n-motion-duration-fast); }
.n-icon-btn:hover { background: var(--n-bg-panel); }
.n-icon-btn--outline { border-color: var(--n-border-ui); }
.n-icon-btn--sm { width: 32px; height: 32px; }
.n-icon-btn--float { background: color-mix(in srgb, var(--n-color-midnight-95) 64%, transparent); color: #fff; backdrop-filter: blur(var(--n-filter-blur-sm)); -webkit-backdrop-filter: blur(var(--n-filter-blur-sm)); }
.n-icon-btn--float:hover { background: color-mix(in srgb, var(--n-color-midnight-95) 80%, transparent); }

/* burger: three lines that morph into a close icon */
.n-burger { width: 40px; height: 40px; display: inline-grid; place-items: center; border: 0; background: none; cursor: pointer; border-radius: var(--n-radius-sm); color: var(--n-text-heading); }
.n-burger:hover { background: var(--n-bg-panel); }
.n-burger span { display: block; width: 20px; height: 1.75px; background: currentColor; border-radius: 2px; position: relative; transition: background var(--n-motion-duration-fast); }
.n-burger span::before, .n-burger span::after { content: ""; position: absolute; left: 0; width: 20px; height: 1.75px; background: currentColor; border-radius: 2px; transition: transform var(--n-motion-duration-base) var(--n-motion-easing-standard), top var(--n-motion-duration-base) var(--n-motion-easing-standard); }
.n-burger span::before { top: -6px; }
.n-burger span::after { top: 6px; }
.n-burger[aria-expanded="true"] span { background: transparent; }
.n-burger[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.n-burger[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

/* ------------------------------------------------------------------ form fields */
.n-field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.n-label { font: 500 14px/1.3 var(--n-font-family-text); color: var(--n-text-heading); display: flex; gap: 6px; align-items: baseline; }
.n-label__opt { font-weight: 400; color: var(--n-text-caption); font-size: 13px; }
.n-hint { font-size: 13px; color: var(--n-text-caption); line-height: 1.4; display: flex; gap: 6px; align-items: flex-start; }
.n-hint .n-ico { width: 15px; height: 15px; margin-top: 1px; }
.n-error { font-size: 13px; color: var(--n-status-danger); display: flex; gap: 6px; align-items: flex-start; line-height: 1.4; }
.n-error .n-ico { width: 15px; height: 15px; margin-top: 1px; }
.n-input, .n-select, .n-textarea {
  height: 40px; width: 100%; padding: 0 12px; border-radius: var(--n-radius-sm);
  border: 1px solid var(--n-border-ui); background: var(--n-surface-raised); color: var(--n-text-heading);
  font: 400 15px var(--n-font-family-text); transition: border-color var(--n-motion-duration-fast), box-shadow var(--n-motion-duration-fast);
}
.n-input::placeholder, .n-textarea::placeholder { color: var(--n-color-steel-50); }
.n-input:hover, .n-select:hover, .n-textarea:hover { border-color: var(--n-text-caption); }
.n-input:focus, .n-select:focus, .n-textarea:focus { outline: none; border-color: var(--n-focus); box-shadow: 0 0 0 3px color-mix(in srgb, var(--n-focus) 22%, transparent); }
.n-input[aria-invalid="true"], .n-textarea[aria-invalid="true"] { border-color: var(--n-status-danger); }
.n-input[aria-invalid="true"]:focus { box-shadow: 0 0 0 3px color-mix(in srgb, var(--n-status-danger) 20%, transparent); }
.n-input:disabled, .n-select:disabled, .n-textarea:disabled { background: var(--n-bg-panel); color: var(--n-text-caption); cursor: not-allowed; opacity: .8; }
.n-input[readonly] { background: var(--n-bg-subtle); }
.n-textarea { height: auto; min-height: 96px; padding: 10px 12px; line-height: 1.5; resize: vertical; }
.n-select { appearance: none; -webkit-appearance: none; padding-right: 36px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2358628A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; background-size: 18px; }
.n-input-wrap { position: relative; display: flex; align-items: center; }
.n-input-wrap > .n-ico { position: absolute; left: 12px; color: var(--n-text-caption); pointer-events: none; }
.n-input-wrap > .n-ico + .n-input { padding-left: 38px; }
.n-input-wrap > .n-input-action { position: absolute; right: 4px; }
.n-input-wrap > .n-input:has(+ .n-input-action) { padding-right: 44px; }
.n-input-action { width: 32px; height: 32px; display: grid; place-items: center; border: 0; background: none; border-radius: 6px; color: var(--n-text-caption); cursor: pointer; }
.n-input-action:hover { background: var(--n-bg-panel); color: var(--n-text-heading); }
.n-input--secret { font-family: var(--n-font-family-mono); letter-spacing: .04em; }
.n-meter { display: flex; gap: 4px; margin-top: 2px; }
.n-meter i { flex: 1; height: 4px; border-radius: 4px; background: var(--n-border-ui); }
.n-meter[data-score="1"] i:nth-child(-n+1) { background: var(--n-status-danger); }
.n-meter[data-score="2"] i:nth-child(-n+2) { background: var(--n-status-warning); }
.n-meter[data-score="3"] i:nth-child(-n+3) { background: var(--n-color-gulf-60); }
.n-meter[data-score="4"] i { background: var(--n-status-success); }
.n-check, .n-radio, .n-switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-size: 15px; color: var(--n-text-heading); }
.n-check input, .n-radio input { appearance: none; -webkit-appearance: none; width: 20px; height: 20px; margin: 0; border: 1.5px solid var(--n-border-ui); background: var(--n-surface-raised); display: grid; place-items: center; cursor: pointer; flex: none; transition: background var(--n-motion-duration-fast), border-color var(--n-motion-duration-fast); }
.n-check input { border-radius: 5px; }
.n-radio input { border-radius: 50%; }
.n-check input:hover, .n-radio input:hover { border-color: var(--n-text-caption); }
.n-check input:checked, .n-check input:indeterminate { background: var(--n-action); border-color: var(--n-action); }
.n-check input:checked::after { content: ""; width: 10px; height: 6px; border: 2px solid var(--n-text-on-action); border-top: 0; border-right: 0; transform: rotate(-45deg) translate(1px, -1px); }
.n-check input:indeterminate::after { content: ""; width: 10px; height: 2px; background: var(--n-text-on-action); border-radius: 2px; }
.n-radio input:checked { border-color: var(--n-action); border-width: 6px; }
.n-check input:disabled, .n-radio input:disabled, .n-switch input:disabled { opacity: var(--n-opacity-disabled); cursor: not-allowed; }
.n-switch input { appearance: none; -webkit-appearance: none; width: 40px; height: 24px; border-radius: 99px; background: var(--n-color-steel-30); position: relative; cursor: pointer; margin: 0; transition: background var(--n-motion-duration-base) var(--n-motion-easing-standard); flex: none; }
.n-switch input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; box-shadow: var(--n-shadow-1); transition: transform var(--n-motion-duration-base) var(--n-motion-easing-standard); }
.n-switch input:checked { background: var(--n-action); }
.n-switch input:checked::after { transform: translateX(16px); }
.n-range { width: 100%; accent-color: var(--n-action); }
.n-fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 10px; }
.n-fieldset legend { font: 500 14px var(--n-font-family-text); color: var(--n-text-heading); margin-bottom: 4px; padding: 0; }
.n-form { display: grid; gap: 20px; max-width: 520px; }
.n-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.n-form__actions { display: flex; gap: 10px; justify-content: flex-end; padding-top: 8px; border-top: 1px solid var(--n-border); }
.n-upload { border: 1.5px dashed var(--n-border-ui); border-radius: var(--n-radius-lg); padding: 24px; text-align: center; color: var(--n-text-caption); font-size: 14px; background: var(--n-bg-subtle); }
.n-upload strong { color: var(--n-text-link); }

/* dropdown / listbox / menu */
.n-dropdown { position: relative; display: inline-block; }
.n-menu { min-width: 220px; background: var(--n-surface-raised); border: 1px solid var(--n-border); border-radius: var(--n-radius-md); box-shadow: var(--n-shadow-3); padding: 6px; display: flex; flex-direction: column; gap: 1px; z-index: var(--n-z-overlay); }
.n-menu__item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; color: var(--n-text-heading); font-size: 14.5px; background: none; border: 0; text-align: left; cursor: pointer; text-decoration: none; width: 100%; font-family: inherit; }
.n-menu__item:hover, .n-menu__item[aria-selected="true"] { background: var(--n-bg-panel); }
.n-menu__item[aria-checked="true"]::after { content: ""; margin-left: auto; width: 10px; height: 6px; border: 2px solid var(--n-text-link); border-top: 0; border-right: 0; transform: rotate(-45deg); }
.n-menu__item[aria-disabled="true"] { opacity: var(--n-opacity-disabled); pointer-events: none; }
.n-menu__item--danger { color: var(--n-status-danger); }
.n-menu__item kbd { margin-left: auto; }
.n-menu__sep { height: 1px; background: var(--n-border); margin: 5px 4px; }
.n-menu__label { font: 700 11px var(--n-font-family-text); letter-spacing: .08em; text-transform: uppercase; color: var(--n-text-caption); padding: 8px 10px 4px; }

/* ------------------------------------------------------------------ badges, pills, chips, tags */
.n-badge { display: inline-flex; align-items: center; gap: 5px; height: 22px; padding: 0 8px; border-radius: var(--n-radius-xs); font: 700 11.5px/1 var(--n-font-family-text); letter-spacing: .02em; background: var(--n-bg-panel); color: var(--n-text-heading); white-space: nowrap; }
.n-badge--info { background: var(--n-status-info-bg); color: var(--n-status-info); }
.n-badge--success { background: var(--n-status-success-bg); color: var(--n-status-success); }
.n-badge--warning { background: var(--n-status-warning-bg); color: var(--n-status-warning); }
.n-badge--danger { background: var(--n-status-danger-bg); color: var(--n-status-danger); }
.n-badge--ai { background: color-mix(in srgb, var(--n-color-oasis-30) 30%, transparent); color: var(--n-color-oasis-85); }
:root[data-theme="dark"] .n-badge--ai { color: var(--n-color-oasis-30); }
.n-badge--solid { background: var(--n-text-heading); color: var(--n-bg-canvas); }
.n-badge__dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.n-count { min-width: 20px; height: 20px; padding: 0 6px; border-radius: 99px; background: var(--n-status-danger); color: #fff; font: 700 11px/20px var(--n-font-family-text); text-align: center; display: inline-block; }
.n-pill { display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 12px; border-radius: var(--n-radius-full); background: var(--n-bg-panel); color: var(--n-text-heading); font: 500 13.5px var(--n-font-family-text); }
.n-chip { display: inline-flex; align-items: center; gap: 6px; height: 32px; padding: 0 12px; border-radius: var(--n-radius-full); border: 1px solid var(--n-border-ui); background: var(--n-surface-raised); color: var(--n-text-heading); font: 500 13.5px var(--n-font-family-text); cursor: pointer; }
.n-chip:hover { border-color: var(--n-text-caption); }
.n-chip[aria-pressed="true"] { background: var(--n-text-heading); border-color: var(--n-text-heading); color: var(--n-bg-canvas); }
.n-chip__x { width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center; margin-right: -6px; border: 0; background: none; color: inherit; cursor: pointer; }
.n-chip__x:hover { background: color-mix(in srgb, currentColor 15%, transparent); }
.n-tag { display: inline-flex; align-items: center; height: 24px; padding: 0 8px; border-radius: var(--n-radius-xs); border: 1px solid var(--n-border-ui); font: 400 12.5px var(--n-font-family-mono); color: var(--n-text-body); }

/* ------------------------------------------------------------------ tabs, segmented, ribbon */
.n-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--n-border); overflow-x: auto; scrollbar-width: none; }
.n-tab { position: relative; padding: 12px 12px; border: 0; background: none; font: 500 14.5px var(--n-font-family-text); color: var(--n-text-caption); cursor: pointer; white-space: nowrap; display: inline-flex; align-items: center; gap: 8px; }
.n-tab:hover { color: var(--n-text-heading); }
.n-tab[aria-selected="true"] { color: var(--n-text-heading); }
.n-tab[aria-selected="true"]::after { content: ""; position: absolute; left: 8px; right: 8px; bottom: -1px; height: 2px; border-radius: 2px; background: var(--n-text-heading); }
.n-tab[aria-disabled="true"], .n-tab:disabled { opacity: var(--n-opacity-disabled); cursor: not-allowed; }
.n-tab .n-count { background: var(--n-bg-panel); color: var(--n-text-heading); }
.n-segmented { display: inline-flex; padding: 3px; gap: 2px; border-radius: 10px; background: var(--n-bg-panel); }
.n-segmented .n-tab { padding: 7px 14px; border-radius: 8px; font-size: 13.5px; }
.n-segmented .n-tab[aria-selected="true"] { background: var(--n-surface-raised); box-shadow: var(--n-shadow-1); }
.n-segmented .n-tab[aria-selected="true"]::after { display: none; }
.n-ribbon { display: flex; gap: 2px; align-items: flex-end; }
.n-ribbon .n-tab { padding: 10px 16px; border-radius: 10px 10px 0 0; background: var(--n-bg-panel); border: 1px solid transparent; border-bottom: 0; }
.n-ribbon .n-tab[aria-selected="true"] { background: var(--n-surface-raised); border-color: var(--n-border); margin-bottom: -1px; padding-bottom: 11px; }
.n-ribbon .n-tab[aria-selected="true"]::after { left: 12px; right: 12px; top: 0; bottom: auto; background: var(--n-action); }
.n-ribbon-panel { border: 1px solid var(--n-border); border-radius: 0 var(--n-radius-md) var(--n-radius-md) var(--n-radius-md); padding: 16px; background: var(--n-surface-raised); }

/* ------------------------------------------------------------------ navigation */
.n-breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 14px; color: var(--n-text-caption); list-style: none; padding: 0; margin: 0; }
.n-breadcrumb li { display: inline-flex; align-items: center; gap: 6px; }
.n-breadcrumb li + li::before { content: "/"; color: var(--n-border-ui); }
.n-breadcrumb a { color: var(--n-text-caption); text-decoration: none; }
.n-breadcrumb a:hover { color: var(--n-text-heading); text-decoration: underline; }
.n-breadcrumb [aria-current="page"] { color: var(--n-text-heading); font-weight: 500; }
.n-pagination { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.n-page { min-width: 36px; height: 36px; padding: 0 8px; display: inline-grid; place-items: center; border-radius: var(--n-radius-sm); border: 1px solid transparent; background: none; color: var(--n-text-heading); font: 500 14px var(--n-font-family-text); cursor: pointer; text-decoration: none; font-variant-numeric: tabular-nums; }
.n-page:hover { background: var(--n-bg-panel); }
.n-page[aria-current="page"] { background: var(--n-text-heading); color: var(--n-bg-canvas); }
.n-page[aria-disabled="true"] { opacity: var(--n-opacity-disabled); pointer-events: none; }
.n-page--gap { pointer-events: none; color: var(--n-text-caption); }
.n-stepper { display: flex; list-style: none; margin: 0; padding: 0; counter-reset: s; }
.n-stepper li { flex: 1; display: flex; flex-direction: column; gap: 8px; font-size: 13.5px; color: var(--n-text-caption); position: relative; counter-increment: s; }
.n-stepper li::before { content: counter(s); width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--n-border-ui); display: grid; place-items: center; font: 700 12px var(--n-font-family-text); background: var(--n-surface-raised); z-index: 1; }
.n-stepper li:not(:last-child)::after { content: ""; position: absolute; top: 14px; left: 32px; right: 4px; height: 1.5px; background: var(--n-border-ui); }
.n-stepper li.is-done::before { content: "✓"; background: var(--n-action); border-color: var(--n-action); color: var(--n-text-on-action); }
.n-stepper li.is-done::after { background: var(--n-action); }
.n-stepper li[aria-current="step"] { color: var(--n-text-heading); font-weight: 500; }
.n-stepper li[aria-current="step"]::before { border-color: var(--n-action); color: var(--n-text-link); box-shadow: 0 0 0 4px color-mix(in srgb, var(--n-action) 18%, transparent); }
.n-tree, .n-tree ul { list-style: none; margin: 0; padding: 0; }
.n-tree ul { margin-left: 14px; padding-left: 10px; border-left: 1px solid var(--n-border); }
.n-tree a, .n-tree summary { display: flex; align-items: center; gap: 6px; padding: 5px 8px; border-radius: 6px; color: var(--n-text-heading); font-size: 14px; text-decoration: none; cursor: pointer; list-style: none; }
.n-tree summary::-webkit-details-marker { display: none; }
.n-tree summary::before { content: ""; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(-45deg); transition: transform var(--n-motion-duration-fast); margin: 0 4px 0 2px; opacity: .7; }
.n-tree details[open] > summary::before { transform: rotate(45deg); }
.n-tree a:hover, .n-tree summary:hover { background: var(--n-bg-panel); }
.n-tree a[aria-current="page"] { background: color-mix(in srgb, var(--n-action) 12%, transparent); color: var(--n-text-link); font-weight: 500; }
.n-tree a { padding-left: 22px; }

/* ------------------------------------------------------------------ content */
.n-card { background: var(--n-surface-raised); border: 1px solid var(--n-border); border-radius: var(--n-radius-lg); padding: var(--n-space-6); }
.n-card--interactive { transition: box-shadow var(--n-motion-duration-base), border-color var(--n-motion-duration-base); cursor: pointer; }
.n-card--interactive:hover { box-shadow: var(--n-shadow-2); border-color: transparent; }
.n-card--selected { border-color: var(--n-action); box-shadow: 0 0 0 1px var(--n-action); }
.n-avatar { width: 36px; height: 36px; border-radius: 50%; display: inline-grid; place-items: center; background: var(--n-color-dawn-20); color: var(--n-color-midnight-90); font: 700 13px var(--n-font-family-text); flex: none; position: relative; }
.n-avatar--sm { width: 28px; height: 28px; font-size: 11px; }
.n-avatar--agent { background: var(--n-color-midnight-80); color: var(--n-color-oasis-30); }
.n-avatar__status { position: absolute; right: -1px; bottom: -1px; width: 10px; height: 10px; border-radius: 50%; background: var(--n-status-success); border: 2px solid var(--n-surface-raised); }
.n-avatars { display: flex; }
.n-avatars .n-avatar { box-shadow: 0 0 0 2px var(--n-surface-raised); }
.n-avatars .n-avatar + .n-avatar { margin-left: -8px; }
.n-kbd { font: 500 12px var(--n-font-family-mono); padding: 2px 6px; border: 1px solid var(--n-border-ui); border-bottom-width: 2px; border-radius: 5px; background: var(--n-surface-raised); color: var(--n-text-heading); }
.n-divider { border: 0; height: 1px; background: var(--n-border); margin: 16px 0; }
.n-divider--label { display: flex; align-items: center; gap: 12px; height: auto; background: none; font-size: 12.5px; color: var(--n-text-caption); }
.n-divider--label::before, .n-divider--label::after { content: ""; flex: 1; height: 1px; background: var(--n-border); }
.n-list { margin: 0; padding-left: 1.4em; display: grid; gap: 6px; color: var(--n-text-body); }
.n-list li::marker { color: var(--n-text-caption); }
.n-list--ordered { list-style: none; padding: 0; counter-reset: n; }
.n-list--ordered > li { counter-increment: n; display: grid; grid-template-columns: 28px 1fr; gap: 10px; align-items: baseline; }
.n-list--ordered > li::before { content: counter(n); width: 24px; height: 24px; border-radius: 50%; background: var(--n-bg-panel); color: var(--n-text-heading); font: 700 12px/24px var(--n-font-family-text); text-align: center; font-variant-numeric: tabular-nums; }
.n-list--nested ol { list-style: lower-alpha; margin-top: 6px; }
.n-list--check { list-style: none; padding: 0; }
.n-list--check li { display: grid; grid-template-columns: 20px 1fr; gap: 8px; }
.n-list--check li::before { content: ""; width: 12px; height: 7px; border: 2px solid var(--n-status-success); border-top: 0; border-right: 0; transform: rotate(-45deg); margin-top: 6px; }
.n-dl { display: grid; grid-template-columns: max-content 1fr; gap: 8px 20px; margin: 0; font-size: 14.5px; }
.n-dl dt { color: var(--n-text-caption); }
.n-dl dd { margin: 0; color: var(--n-text-heading); }
.n-accordion { border-top: 1px solid var(--n-border); }
.n-accordion details { border-bottom: 1px solid var(--n-border); }
.n-accordion summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 4px; cursor: pointer; font: 500 16px var(--n-font-family-display); color: var(--n-text-heading); }
.n-accordion summary::-webkit-details-marker { display: none; }
.n-accordion summary::after { content: ""; width: 9px; height: 9px; border-right: 1.75px solid currentColor; border-bottom: 1.75px solid currentColor; transform: rotate(45deg) translate(-2px, -2px); transition: transform var(--n-motion-duration-base) var(--n-motion-easing-standard); flex: none; }
.n-accordion details[open] summary::after { transform: rotate(-135deg) translate(-2px, -2px); }
.n-accordion__body { padding: 0 4px 18px; color: var(--n-text-body); font-size: 15px; }
.n-tooltip { position: relative; display: inline-flex; }
.n-tooltip__bubble { position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%); background: var(--n-color-midnight-90); color: var(--n-color-base-snow); font: 500 12.5px/1.35 var(--n-font-family-text); padding: 6px 10px; border-radius: 6px; white-space: nowrap; pointer-events: none; opacity: 0; transition: opacity var(--n-motion-duration-fast) var(--n-motion-easing-standard) 400ms; z-index: var(--n-z-toast); box-shadow: var(--n-shadow-2); }
.n-tooltip__bubble::after { content: ""; position: absolute; top: 100%; left: 50%; margin-left: -5px; border: 5px solid transparent; border-top-color: var(--n-color-midnight-90); }
.n-tooltip:hover .n-tooltip__bubble, .n-tooltip:focus-within .n-tooltip__bubble, .n-tooltip.is-open .n-tooltip__bubble { opacity: 1; }
:root[data-theme="dark"] .n-tooltip__bubble { background: var(--n-color-base-snow); color: var(--n-color-midnight-90); }
:root[data-theme="dark"] .n-tooltip__bubble::after { border-top-color: var(--n-color-base-snow); }
.n-help { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid var(--n-text-caption); color: var(--n-text-caption); font: 700 11px/15px var(--n-font-family-text); text-align: center; display: inline-block; cursor: help; background: none; padding: 0; }

/* code block with copy button */
.n-code { position: relative; border-radius: var(--n-radius-lg); background: var(--n-color-midnight-95); color: var(--n-color-midnight-10); overflow: hidden; border: 1px solid #222a44; }
.n-code__head { display: flex; align-items: center; justify-content: space-between; padding: 8px 8px 8px 16px; border-bottom: 1px solid rgba(255,255,255,.08); font: 500 12px var(--n-font-family-text); color: var(--n-color-midnight-30); }
.n-code pre { margin: 0; padding: 16px 18px; overflow-x: auto; font: 400 13.5px/1.65 var(--n-font-family-mono); tab-size: 2; }
.n-code .ln { display: inline-block; width: 2.2em; color: #4E5A82; user-select: none; }
.n-code .k { color: #95ECF1; } .n-code .s { color: #FDB48D; } .n-code .c { color: #7C85A8; font-style: italic; } .n-code .n { color: #C3DDF4; } .n-code .f { color: #9FC9EE; }
.n-code .hl { display: block; background: rgba(149,236,241,.08); margin: 0 -18px; padding: 0 18px; box-shadow: inset 2px 0 0 #95ECF1; }
.n-copy { display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 10px; border-radius: 6px; border: 1px solid rgba(255,255,255,.14); background: rgba(255,255,255,.06); color: var(--n-color-midnight-10); font: 500 12px var(--n-font-family-text); cursor: pointer; }
.n-copy:hover { background: rgba(255,255,255,.12); }
.n-copy.is-done { color: #95ECF1; border-color: rgba(149,236,241,.4); }
.n-code--floating .n-copy { position: absolute; top: 10px; right: 10px; opacity: 0; transition: opacity var(--n-motion-duration-fast); }
.n-code--floating:hover .n-copy, .n-code--floating:focus-within .n-copy { opacity: 1; }

/* media with overlays */
.n-media { position: relative; border-radius: var(--n-radius-lg); overflow: hidden; display: block; }
.n-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.n-media__actions { position: absolute; top: 12px; right: 12px; display: flex; gap: 8px; opacity: 0; transition: opacity var(--n-motion-duration-fast); }
.n-media:hover .n-media__actions, .n-media:focus-within .n-media__actions { opacity: 1; }
.n-media__caption { position: absolute; left: 0; right: 0; bottom: 0; padding: 32px 16px 12px; color: #fff; font-size: 13px; background: linear-gradient(to top, rgba(18,22,36,.78), transparent); }
.n-media__badge { position: absolute; left: 12px; top: 12px; }

/* scrollbars */
.n-scroll { scrollbar-width: thin; scrollbar-color: var(--n-color-steel-30) transparent; }
.n-scroll::-webkit-scrollbar { width: 10px; height: 10px; }
.n-scroll::-webkit-scrollbar-thumb { background: var(--n-color-steel-30); border-radius: 10px; border: 3px solid transparent; background-clip: padding-box; }
.n-scroll::-webkit-scrollbar-thumb:hover { background-color: var(--n-color-steel-50); }
.n-scroll::-webkit-scrollbar-track { background: transparent; }
.n-scroll--fade { mask-image: linear-gradient(to bottom, #000 calc(100% - 32px), transparent); }

/* calendar */
.n-cal { width: 300px; background: var(--n-surface-raised); border: 1px solid var(--n-border); border-radius: var(--n-radius-lg); padding: 14px; box-shadow: var(--n-shadow-2); }
.n-cal__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; font: 500 15px var(--n-font-family-display); color: var(--n-text-heading); }
.n-cal__grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; text-align: center; }
.n-cal__dow { font: 500 11.5px var(--n-font-family-text); color: var(--n-text-caption); padding: 6px 0; }
.n-cal__day { height: 36px; border-radius: 8px; border: 0; background: none; color: var(--n-text-heading); font: 400 13.5px var(--n-font-family-text); cursor: pointer; font-variant-numeric: tabular-nums; }
.n-cal__day:hover { background: var(--n-bg-panel); }
.n-cal__day--muted { color: var(--n-color-steel-50); }
.n-cal__day--today { font-weight: 700; box-shadow: inset 0 0 0 1.5px var(--n-border-ui); }
.n-cal__day--range { background: color-mix(in srgb, var(--n-action) 12%, transparent); border-radius: 0; }
.n-cal__day[aria-selected="true"] { background: var(--n-action); color: var(--n-text-on-action); font-weight: 700; border-radius: 8px; }
.n-cal__day:disabled { color: var(--n-color-steel-30); text-decoration: line-through; cursor: not-allowed; background: none; }
.n-cal__day--event { position: relative; }
.n-cal__day--event::after { content: ""; position: absolute; left: 50%; bottom: 5px; width: 4px; height: 4px; margin-left: -2px; border-radius: 50%; background: var(--n-color-oasis-70); }

/* ------------------------------------------------------------------ tables */
.n-table-wrap { overflow: auto; border: 1px solid var(--n-border-ui); border-radius: var(--n-radius-md); background: var(--n-surface-raised); max-width: 100%; }
.n-table { width: 100%; border-collapse: separate; border-spacing: 0; font: 400 14px/1.45 var(--n-font-family-text); color: var(--n-text-body); }
.n-table caption { caption-side: top; text-align: left; padding: 14px 16px 10px; font: 500 15px var(--n-font-family-display); color: var(--n-text-heading); }
.n-table th, .n-table td { padding: 11px 16px; text-align: left; vertical-align: middle; border-bottom: 1px solid var(--n-border-ui); }
.n-table thead th { position: sticky; top: 0; z-index: 1; background: var(--n-table-header); color: var(--n-text-caption); font: 600 12px/1.3 var(--n-font-family-text); letter-spacing: .03em; white-space: nowrap; border-bottom: 1px solid var(--n-border-ui); }
.n-table tbody th { font-weight: 500; color: var(--n-text-heading); }
.n-table tbody tr:last-child > * { border-bottom: 0; }
.n-table tbody tr:hover > * { background: var(--n-row-hover); }
.n-table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.n-table .center { text-align: center; }
.n-table .muted { color: var(--n-text-caption); }
.n-table--zebra tbody tr:nth-child(even) > * { background: var(--n-color-steel-05); }
:root[data-theme="dark"] .n-table--zebra tbody tr:nth-child(even) > * { background: color-mix(in srgb, #fff 3%, transparent); }
.n-table--compact th, .n-table--compact td { padding: 6px 12px; font-size: 13px; }
.n-table--relaxed th, .n-table--relaxed td { padding: 16px 20px; }
.n-table--grid th, .n-table--grid td { border-right: 1px solid var(--n-border-ui); }
.n-table--grid tr > :last-child { border-right: 0; }
.n-table tr.is-selected > * { background: var(--n-row-selected) !important; }
.n-table tr.is-selected > :first-child { box-shadow: inset 3px 0 0 var(--n-action); }
.n-table td.is-highlight { background: color-mix(in srgb, var(--n-color-dawn-20) 70%, transparent) !important; color: var(--n-color-midnight-90); font-weight: 600; }
.n-table td.is-ai { box-shadow: inset 0 0 0 1.5px var(--n-color-oasis-70); border-radius: 4px; }
.n-table td.is-error { color: var(--n-status-danger); background: var(--n-status-danger-bg) !important; }
.n-table tfoot td, .n-table tfoot th { font-weight: 600; color: var(--n-text-heading); border-top: 2px solid var(--n-border-ui); border-bottom: 0; background: var(--n-bg-subtle); }
.n-table th[colspan] { text-align: center; border-bottom: 1px solid var(--n-border-ui); }
.n-table td[rowspan] { vertical-align: top; background: var(--n-bg-subtle); font-weight: 500; color: var(--n-text-heading); border-right: 1px solid var(--n-border-ui); }
.n-table .sort { display: inline-flex; align-items: center; gap: 4px; background: none; border: 0; padding: 0; font: inherit; color: inherit; letter-spacing: inherit; cursor: pointer; }
.n-table .sort::after { content: "↕"; font-size: 11px; opacity: .5; }
.n-table th[aria-sort="ascending"] .sort::after { content: "↑"; opacity: 1; }
.n-table th[aria-sort="descending"] .sort::after { content: "↓"; opacity: 1; }
.n-table th[aria-sort] { color: var(--n-text-heading); }
.n-table .sticky-col { position: sticky; left: 0; z-index: 2; background: var(--n-surface-raised); box-shadow: 1px 0 0 var(--n-border-ui); }
.n-table thead .sticky-col { z-index: 3; background: var(--n-table-header); }
.n-table-empty { padding: 40px 16px; text-align: center; color: var(--n-text-caption); }
.n-table-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; border-top: 1px solid var(--n-border-ui); font-size: 13px; color: var(--n-text-caption); flex-wrap: wrap; }

/* ------------------------------------------------------------------ feedback */
.n-alert { display: grid; grid-template-columns: 20px 1fr auto; gap: 12px; align-items: start; padding: 14px 16px; border-radius: var(--n-radius-md); border: 1px solid; font-size: 14.5px; line-height: 1.45; }
.n-alert .n-ico { width: 20px; height: 20px; margin-top: 1px; }
.n-alert__title { font-weight: 700; color: inherit; display: block; margin-bottom: 2px; }
.n-alert p { margin: 0; color: var(--n-text-body); }
.n-alert--info { background: var(--n-status-info-bg); border-color: color-mix(in srgb, var(--n-status-info) 25%, transparent); color: var(--n-status-info); }
.n-alert--success { background: var(--n-status-success-bg); border-color: color-mix(in srgb, var(--n-status-success) 25%, transparent); color: var(--n-status-success); }
.n-alert--warning { background: var(--n-status-warning-bg); border-color: color-mix(in srgb, var(--n-status-warning) 25%, transparent); color: var(--n-status-warning); }
.n-alert--danger { background: var(--n-status-danger-bg); border-color: color-mix(in srgb, var(--n-status-danger) 25%, transparent); color: var(--n-status-danger); }
:root[data-theme="dark"] .n-alert p { color: var(--n-color-midnight-90); }
.n-banner { display: flex; align-items: center; gap: 12px; padding: 10px 16px; font-size: 14px; background: var(--n-color-midnight-90); color: var(--n-color-base-snow); border-radius: var(--n-radius-sm); }
.n-banner a { color: var(--n-color-oasis-30); }
.n-toast { display: grid; grid-template-columns: 20px 1fr auto; gap: 12px; align-items: center; min-width: 300px; max-width: 420px; padding: 12px 12px 12px 16px; border-radius: var(--n-radius-md); background: var(--n-color-midnight-90); color: var(--n-color-base-snow); box-shadow: var(--n-shadow-3); font-size: 14px; }
.n-toast .n-ico { width: 20px; height: 20px; }
.n-toast--success .n-ico { color: #6FD3A2; }
.n-toast--danger .n-ico { color: #FF8A84; }
.n-toast--ai .n-ico { color: var(--n-color-oasis-30); }
.n-toast__action { background: none; border: 0; color: var(--n-color-oasis-30); font: 600 13.5px var(--n-font-family-text); cursor: pointer; padding: 6px 8px; border-radius: 6px; }
.n-toast__action:hover { background: rgba(255,255,255,.08); }
.n-toast-stack { position: fixed; bottom: 24px; right: 24px; display: flex; flex-direction: column; gap: 10px; z-index: var(--n-z-toast); }
.n-progress { height: 6px; border-radius: 6px; background: var(--n-bg-panel); overflow: hidden; position: relative; }
.n-progress__bar { height: 100%; border-radius: 6px; background: var(--n-gradient-horizon); background-size: 200% 100%; transition: width var(--n-motion-duration-slow) var(--n-motion-easing-standard); }
.n-progress--indeterminate .n-progress__bar { position: absolute; width: 40%; animation: n-indeterminate 1.4s var(--n-motion-easing-standard) infinite; }
.n-spinner { width: 20px; height: 20px; border-radius: 50%; border: 2px solid color-mix(in srgb, currentColor 22%, transparent); border-top-color: currentColor; animation: n-spin 700ms linear infinite; display: inline-block; color: var(--n-text-link); flex: none; }
.n-spinner--lg { width: 32px; height: 32px; border-width: 2.5px; }
.n-dots { display: inline-flex; gap: 5px; align-items: center; }
.n-dots i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; animation: n-dot 1.2s var(--n-motion-easing-standard) infinite; color: var(--n-text-link); }
.n-dots i:nth-child(2) { animation-delay: .15s; }
.n-dots i:nth-child(3) { animation-delay: .3s; }
.n-pulse { width: 12px; height: 12px; border-radius: 50%; background: var(--n-color-oasis-30); box-shadow: var(--n-shadow-glow); animation: n-glow 2.4s var(--n-motion-easing-standard) infinite; display: inline-block; }
.n-empty { text-align: center; padding: 40px 24px; display: flex; flex-direction: column; align-items: center; gap: 10px; color: var(--n-text-caption); }
.n-empty__art { width: 120px; opacity: .9; }
.n-empty h4 { margin: 4px 0 0; font: 500 18px var(--n-font-family-display); color: var(--n-text-heading); }
.n-empty p { margin: 0; max-width: 40ch; font-size: 14.5px; }

/* skeletons */
.n-skel { display: block; border-radius: 6px; background: var(--n-skeleton-base); position: relative; overflow: hidden; }
.n-skel--text { height: 12px; margin: 6px 0; }
.n-skel--title { height: 20px; width: 55%; margin-bottom: 12px; }
.n-skel--circle { border-radius: 50%; }
.n-skel--block { border-radius: var(--n-radius-lg); }
.n-skel--shimmer::after { content: ""; position: absolute; inset: 0; transform: translateX(-100%); background: linear-gradient(90deg, transparent, var(--n-skeleton-shine), transparent); animation: n-shimmer 1.6s var(--n-motion-easing-standard) infinite; }
.n-skel--pulse { animation: n-skel-pulse 1.6s ease-in-out infinite; }
.n-ghost { border: 1.5px dashed var(--n-border-ui); border-radius: var(--n-radius-lg); background: transparent; color: var(--n-text-caption); display: grid; place-items: center; font-size: 14px; }

/* overlays */
.n-scrim { position: fixed; inset: 0; background: var(--n-scrim); backdrop-filter: blur(var(--n-filter-blur-scrim)); -webkit-backdrop-filter: blur(var(--n-filter-blur-scrim)); z-index: var(--n-z-overlay); }
.n-dialog { width: min(480px, calc(100vw - 32px)); background: var(--n-surface-raised); border-radius: var(--n-radius-xl); box-shadow: var(--n-shadow-4); padding: 24px; border: 1px solid var(--n-border); color: var(--n-text-body); }
.n-dialog h3 { margin: 0 0 8px; font: 500 20px var(--n-font-family-display); color: var(--n-text-heading); }
.n-dialog__actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }
.n-drawer { width: 380px; max-width: 100%; height: 100%; background: var(--n-surface-raised); box-shadow: var(--n-shadow-4); border-left: 1px solid var(--n-border); padding: 20px; }
.n-popover { background: var(--n-surface-raised); border: 1px solid var(--n-border); border-radius: var(--n-radius-md); box-shadow: var(--n-shadow-3); padding: 14px 16px; max-width: 300px; font-size: 14px; color: var(--n-text-body); }
.n-sheet-handle { width: 36px; height: 4px; border-radius: 4px; background: var(--n-border-ui); margin: 0 auto 12px; }

/* ------------------------------------------------------------------ motion */
@keyframes n-spin { to { transform: rotate(360deg); } }
@keyframes n-dot { 0%, 80%, 100% { transform: translateY(0); opacity: .4; } 40% { transform: translateY(-5px); opacity: 1; } }
@keyframes n-glow { 50% { box-shadow: 0 0 0 1px rgba(149,236,241,.4), 0 0 40px rgba(149,236,241,.6); } }
@keyframes n-shimmer { to { transform: translateX(100%); } }
@keyframes n-skel-pulse { 50% { opacity: .55; } }
@keyframes n-indeterminate { 0% { left: -40%; } 100% { left: 100%; } }
@media (prefers-reduced-motion: reduce) {
  .n-spinner, .n-dots i, .n-pulse, .n-skel--shimmer::after, .n-skel--pulse, .n-progress--indeterminate .n-progress__bar, .n-btn[aria-busy="true"]::after { animation-duration: 2.4s; }
  .n-skel--shimmer::after { animation: none; }
}
.n-flip { transform: scaleX(-1); }
:dir(rtl) .n-ico--directional { transform: scaleX(-1); }