Niveus/niveus/components/input.css
Nexoniarz 23b8dd376d Niveus: a tactile, adaptive interface language
Bevelled controls with light falling across them, fields as wells, solid
windows, and glass kept for the chrome that floats over everything else.
Warm graphite in dark, soft paper in light, one brand color driving both.
Ships its own fonts (Instrument Sans, JetBrains Mono; OFL).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-03 17:47:03 +02:00

407 lines
11 KiB
CSS

/* ==========================================================================
Niveus — Input
--------------------------------------------------------------------------
.nv-field label + control + hint, correctly spaced
.nv-input text input, textarea and select
.nv-input-group control with a leading or trailing affix
.nv-select wrapper that supplies the chevron
.nv-checkbox / .nv-radio custom marks on the native controls
.nv-switch binary control with an inset track
Inputs are the system's inset material: they read as wells cut into the
surface that holds them — shaded inside, lit along the lower lip — which is
what distinguishes a place to type from a thing to press. On focus the recess stays — only the ring and border change,
so the field never appears to jump forward.
========================================================================== */
.nv-field {
display: flex;
flex-direction: column;
gap: var(--nv-space-1-5);
min-inline-size: 0;
}
.nv-field__label {
font: var(--nv-font-label);
color: var(--nv-color-text-primary);
}
.nv-field__label[data-optional]::after {
content: " " attr(data-optional);
color: var(--nv-color-text-tertiary);
font-weight: var(--nv-font-weight-regular);
}
.nv-field__hint {
font: var(--nv-font-caption);
color: var(--nv-color-text-secondary);
}
.nv-field__error {
display: flex;
align-items: center;
gap: var(--nv-space-1-5);
font: var(--nv-font-caption);
font-weight: var(--nv-font-weight-medium);
color: var(--nv-color-danger-text);
}
/* --- Control ----------------------------------------------------------------- */
.nv-input {
--_height: var(--nv-control-height-md);
--_padding: var(--nv-control-padding-md);
--_font-size: var(--nv-font-size-md);
--_radius: var(--nv-radius-md);
--_border: var(--nv-color-border);
inline-size: 100%;
min-inline-size: 0;
block-size: var(--_height);
padding-inline: var(--_padding);
background-color: var(--nv-color-surface-inset);
color: var(--nv-color-text-primary);
border: var(--nv-border-width) solid var(--_border);
border-radius: var(--_radius);
box-shadow: var(--nv-elevation-inset-md), var(--nv-ledge);
font-family: var(--nv-font-family-sans);
font-size: var(--_font-size);
line-height: var(--nv-line-height-snug);
transition: var(--nv-transition-control);
appearance: none;
}
.nv-input::placeholder {
color: var(--nv-color-text-tertiary);
}
@media (hover: hover) {
.nv-input:hover:not(:disabled, [readonly]) {
--_border: var(--nv-color-border-strong);
}
}
.nv-input:focus-visible,
.nv-input:focus {
outline: none;
--_border: var(--nv-color-accent);
box-shadow: var(--nv-elevation-inset-md), var(--nv-focus-ring);
}
.nv-input[aria-invalid="true"] {
--_border: var(--nv-color-danger);
--nv-color-focus-ring: var(--nv-color-danger-border);
}
.nv-input:disabled {
background-color: var(--nv-color-background-subtle);
color: var(--nv-color-text-disabled);
box-shadow: none;
cursor: not-allowed;
}
.nv-input[readonly] {
background-color: transparent;
box-shadow: none;
}
/* Multi-line controls grow, so height becomes a minimum and the block padding
has to be stated explicitly. */
textarea.nv-input {
block-size: auto;
min-block-size: calc(var(--nv-control-height-lg) * 2);
padding-block: var(--nv-space-2-5);
line-height: var(--nv-line-height-normal);
}
.nv-input--sm {
--_height: var(--nv-control-height-sm);
--_padding: var(--nv-control-padding-sm);
--_font-size: var(--nv-font-size-sm);
--_radius: var(--nv-radius-sm);
}
/* A color well: the swatch fills the control, so the value is the control. */
.nv-input--color {
inline-size: var(--nv-control-height-md);
padding: var(--nv-space-1);
cursor: pointer;
}
.nv-input--color::-webkit-color-swatch-wrapper {
padding: 0;
}
.nv-input--color::-webkit-color-swatch,
.nv-input--color::-moz-color-swatch {
border: var(--nv-border-width) solid var(--nv-color-border);
border-radius: calc(var(--nv-radius-md) - var(--nv-space-1));
}
.nv-input--lg {
--_height: var(--nv-control-height-lg);
--_padding: var(--nv-control-padding-lg);
--_font-size: var(--nv-font-size-lg);
}
/* --- Affixes -------------------------------------------------------------------
<div class="nv-input-group">
<span class="nv-input-group__affix">@</span>
<input class="nv-input">
</div>
The affix sits inside the field's recess rather than beside it, so the group
still reads as a single surface. */
.nv-input-group {
position: relative;
display: flex;
align-items: center;
inline-size: 100%;
}
.nv-input-group__affix {
position: absolute;
z-index: 1;
display: flex;
align-items: center;
padding-inline: var(--nv-control-padding-md);
color: var(--nv-color-text-tertiary);
font-size: var(--nv-font-size-sm);
pointer-events: none;
}
.nv-input-group__affix:first-child {
inset-inline-start: 0;
}
.nv-input-group__affix:last-child {
inset-inline-end: 0;
}
.nv-input-group__affix:first-child ~ .nv-input {
padding-inline-start: calc(var(--nv-control-padding-md) * 2 + 1em);
}
.nv-input:has(~ .nv-input-group__affix:last-child) {
padding-inline-end: calc(var(--nv-control-padding-md) * 2 + 1em);
}
/* Interactive affixes — a clear button, a reveal toggle — opt back in. */
.nv-input-group__affix > * {
pointer-events: auto;
}
/* --- Select ----------------------------------------------------------------------
<div class="nv-select"><select class="nv-input">…</select></div> */
.nv-select {
position: relative;
display: flex;
inline-size: 100%;
}
.nv-select > .nv-input {
padding-inline-end: calc(var(--nv-control-padding-md) * 2 + 0.5em);
cursor: pointer;
}
.nv-select::after {
content: "";
position: absolute;
inset-inline-end: var(--nv-control-padding-md);
inset-block-start: 50%;
inline-size: 0.45em;
block-size: 0.45em;
margin-block-start: -0.28em;
border-inline-end: 1.5px solid var(--nv-color-text-tertiary);
border-block-end: 1.5px solid var(--nv-color-text-tertiary);
rotate: 45deg;
pointer-events: none;
}
/* --- Checkbox and radio ------------------------------------------------------------ */
.nv-checkbox,
.nv-radio {
position: relative;
flex: none;
inline-size: var(--nv-space-5);
block-size: var(--nv-space-5);
margin: 0;
background-color: var(--nv-color-surface-inset);
border: var(--nv-border-width) solid var(--nv-color-border-strong);
border-radius: var(--nv-radius-xs);
box-shadow: var(--nv-elevation-inset-sm), var(--nv-ledge);
cursor: pointer;
appearance: none;
transition: var(--nv-transition-control);
}
.nv-radio {
border-radius: var(--nv-radius-full);
}
.nv-checkbox:checked,
.nv-radio:checked,
.nv-checkbox:indeterminate {
background-color: var(--nv-color-accent);
background-image: var(--nv-sheen-filled);
border-color: transparent;
box-shadow: var(--nv-bevel), var(--nv-outline), var(--nv-elevation-1);
}
/* The marks are always present, at zero size and zero opacity, so checking a
box grows the tick out of its centre instead of stamping it there. A mark
that only exists in the :checked state has nothing to animate from. */
.nv-checkbox::after,
.nv-radio::after,
.nv-checkbox::before {
content: "";
position: absolute;
opacity: 0;
scale: 0;
transition:
opacity var(--nv-duration-fast) var(--nv-ease-standard),
scale var(--nv-duration-quick) var(--nv-ease-spring);
}
/* The tick is drawn from two borders so it scales with the control and needs
no asset. */
.nv-checkbox::after {
inset-block-start: 45%;
inset-inline-start: 50%;
inline-size: 0.28em;
block-size: 0.55em;
translate: -50% -50%;
rotate: 45deg;
border-inline-end: 2px solid var(--nv-color-on-accent);
border-block-end: 2px solid var(--nv-color-on-accent);
}
.nv-checkbox:checked:not(:indeterminate)::after {
opacity: 1;
scale: 1;
}
/* Indeterminate is its own mark rather than a variation of the tick: the two
have to be able to cross over each other when the state changes. */
.nv-checkbox::before {
inset: 50% 25% auto;
translate: 0 -50%;
block-size: 2px;
background-color: var(--nv-color-on-accent);
border-radius: var(--nv-radius-full);
}
.nv-checkbox:indeterminate::before {
opacity: 1;
scale: 1;
}
.nv-radio::after {
inset: 50% auto auto 50%;
translate: -50% -50%;
inline-size: 0.4em;
block-size: 0.4em;
background-color: var(--nv-color-on-accent);
border-radius: var(--nv-radius-full);
}
.nv-radio:checked::after {
opacity: 1;
scale: 1;
}
.nv-checkbox:disabled,
.nv-radio:disabled {
background-color: var(--nv-color-background-subtle);
border-color: var(--nv-color-border);
box-shadow: none;
cursor: not-allowed;
}
/* --- Switch --------------------------------------------------------------------------
The track is a slot cut into the surface and the thumb is a knob riding in
it: the physical relationship does the explaining, so the control reads as
on or off without a label. The slot stays recessed when it fills with color
— switching on lights the slot, it does not raise it. */
.nv-switch {
--_track-inline: calc(var(--nv-space-6) * 1.5);
--_track-block: var(--nv-space-6);
--_thumb: calc(var(--_track-block) - 6px);
--_inset: 2px;
--_travel: calc(
var(--_track-inline) - var(--_thumb) - var(--_inset) * 2 -
var(--nv-border-width) * 2
);
position: relative;
flex: none;
inline-size: var(--_track-inline);
block-size: var(--_track-block);
margin: 0;
background-color: var(--nv-color-surface-inset);
border: var(--nv-border-width) solid var(--nv-color-border);
border-radius: var(--nv-radius-full);
box-shadow: var(--nv-elevation-inset-md), var(--nv-ledge);
cursor: pointer;
appearance: none;
transition: var(--nv-transition-control);
}
.nv-switch::after {
content: "";
position: absolute;
inset-block-start: 50%;
inset-inline-start: var(--_inset);
inline-size: var(--_thumb);
block-size: var(--_thumb);
translate: 0 -50%;
background-color: var(--nv-color-knob);
background-image: var(--nv-sheen-knob);
border-radius: var(--nv-radius-full);
box-shadow: var(--nv-outline), var(--nv-elevation-2);
transition:
translate var(--nv-duration-travel) var(--nv-ease-emphasized),
background-color var(--nv-duration-fast) var(--nv-ease-standard);
}
.nv-switch:checked {
background-color: var(--nv-color-accent);
border-color: transparent;
box-shadow: var(--nv-elevation-inset-md), var(--nv-outline);
}
.nv-switch:checked::after {
translate: var(--_travel) -50%;
}
.nv-switch:disabled {
cursor: not-allowed;
opacity: 0.55;
}
/* --- Inline control + label --------------------------------------------------------- */
.nv-choice {
display: flex;
align-items: center;
gap: var(--nv-space-2-5);
font: var(--nv-font-body);
cursor: pointer;
}
.nv-choice:has(:disabled) {
color: var(--nv-color-text-disabled);
cursor: not-allowed;
}
/* translate has no logical equivalent, so the thumb's direction is flipped
explicitly rather than travelling the wrong way in RTL. */
.nv-switch:checked:dir(rtl)::after {
translate: calc(var(--_travel) * -1) -50%;
}