/*
 * Sukud design system - controls
 * Buttons, badges, chips, avatars, spinners, skeletons, kbd, dividers,
 * tooltips. Colours come from the --t-* tone variables.
 */

/* ======================================================================
 * Button
 * ====================================================================== */
.sk-btn {
  --h: var(--sk-control-md);
  --px: 14px;
  --fs: var(--sk-text-md);
  --btn-gap: 7px;
  --r: var(--sk-radius-control);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--btn-gap);
  height: var(--h);
  min-width: var(--h);
  padding: 0 var(--px);
  border: 1px solid transparent;
  border-radius: var(--r);
  font-size: var(--fs);
  font-weight: var(--sk-weight-semibold);
  line-height: 1;
  letter-spacing: -0.005em;
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
  isolation: isolate;
  cursor: pointer;
  transition:
    background-color var(--sk-dur-fast) var(--sk-ease-out),
    border-color var(--sk-dur-fast) var(--sk-ease-out),
    color var(--sk-dur-fast) var(--sk-ease-out),
    box-shadow var(--sk-dur-base) var(--sk-ease-out),
    transform var(--sk-dur-base) var(--sk-ease-spring);
}
.sk-btn > .sk-icon { width: 1.15em; height: 1.15em; margin-inline: -1px; }
.sk-btn__label { display: inline-flex; align-items: center; min-width: 0; }
.sk-btn:active:not(:disabled, [aria-disabled="true"], [aria-busy="true"]) {
  transform: translateY(1px) scale(0.975);
  transition-duration: var(--sk-dur-instant);
}

.sk-btn--xs { --h: var(--sk-control-xs); --px: 8px; --fs: var(--sk-text-xs); --btn-gap: 4px; --r: 7px; }
.sk-btn--sm { --h: var(--sk-control-sm); --px: 11px; --fs: var(--sk-text-sm); --btn-gap: 6px; --r: var(--sk-radius-sm); }
.sk-btn--lg { --h: var(--sk-control-lg); --px: 20px; --fs: var(--sk-text-lg); --btn-gap: 9px; --r: 12px; }
.sk-btn--icon { --r: var(--sk-radius-full); padding: 0; width: var(--h); }
.sk-btn--block { display: flex; width: 100%; }
.sk-btn--pill { --r: var(--sk-radius-full); }

/* Solid: tactile, with a top bevel and a coloured contact shadow. */
.sk-btn--solid {
  background-color: var(--t-solid);
  background-image: linear-gradient(180deg, rgb(255 255 255 / 0.12), rgb(255 255 255 / 0) 60%);
  color: var(--t-on);
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / 0.18),
    inset 0 -1px 0 rgb(0 0 0 / 0.14),
    0 1px 2px rgb(var(--t-rgb) / 0.3),
    0 2px 5px -2px rgb(var(--t-rgb) / 0.4);
}
.sk-btn--solid:hover:not(:disabled, [aria-disabled="true"]) {
  background-color: var(--t-solid-hover);
  box-shadow:
    inset 0 1px 0 rgb(255 255 255 / 0.2),
    inset 0 -1px 0 rgb(0 0 0 / 0.16),
    0 1px 2px rgb(var(--t-rgb) / 0.3),
    0 4px 12px -4px rgb(var(--t-rgb) / 0.5);
}
.sk-btn--solid.sk-tone-neutral { box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.12), 0 1px 2px rgb(0 0 0 / 0.2), 0 3px 8px -3px rgb(0 0 0 / 0.35); }

.sk-btn--soft { background: var(--t-soft); color: var(--t-text); }
.sk-btn--soft:hover:not(:disabled, [aria-disabled="true"]) { background: var(--t-soft-hover); }
.sk-btn--soft:active:not(:disabled) { background: var(--t-soft-active); }
.sk-btn--soft.sk-tone-neutral { color: var(--sk-fg); }

.sk-btn--outline {
  background: var(--sk-surface);
  border-color: var(--sk-border);
  color: var(--sk-fg);
  box-shadow: var(--sk-shadow-xs), var(--sk-bevel);
}
.sk-btn--outline:hover:not(:disabled, [aria-disabled="true"]) { background: var(--sk-surface-hover); border-color: var(--sk-border-strong); }
/* In dark mode an outline button gets its own fill so its edge reads as
 * clearly as a solid button's beside it. */
[data-theme="dark"] .sk-btn--outline { background: var(--sk-surface-hover); border-color: var(--sk-border-strong); }
[data-theme="dark"] .sk-btn--outline:hover:not(:disabled, [aria-disabled="true"]) { background: var(--sk-surface-active); }
.sk-btn--outline:not(.sk-tone-neutral) { color: var(--t-text); border-color: var(--t-border); }
.sk-btn--outline:not(.sk-tone-neutral):hover:not(:disabled, [aria-disabled="true"]) { background: var(--t-subtle); border-color: var(--t-border-strong); }

.sk-btn--ghost { background: transparent; color: var(--sk-fg-muted); }
.sk-btn--ghost:hover:not(:disabled, [aria-disabled="true"]) { background: var(--sk-surface-hover); color: var(--sk-fg); }
.sk-btn--ghost:active:not(:disabled) { background: var(--sk-surface-active); }
.sk-btn--ghost:not(.sk-tone-neutral) { color: var(--t-text); }
.sk-btn--ghost:not(.sk-tone-neutral):hover:not(:disabled, [aria-disabled="true"]) { background: var(--t-soft); color: var(--t-text); }

.sk-btn--link {
  --h: auto; --px: 0;
  min-width: 0;
  background: none;
  color: var(--t-text);
  border-radius: 4px;
  text-decoration: underline;
  text-decoration-color: rgb(var(--t-rgb) / 0.3);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}
.sk-btn--link:hover { text-decoration-color: currentColor; }
.sk-btn--link:active:not(:disabled) { transform: none; }

.sk-btn:disabled, .sk-btn[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: none;
  filter: saturate(0.6);
}

/* Loading keeps the button's width; the spinner sits over the content. */
.sk-btn[aria-busy="true"] { cursor: progress; }
.sk-btn[aria-busy="true"] > :not(.sk-btn__spinner) { opacity: 0; }
.sk-btn__spinner { position: absolute; inset: 0; display: grid; place-items: center; }

/* Trailing arrow nudges on hover. */
@media (hover: hover) {
  .sk-btn:hover > .sk-btn__trail { transform: translateX(2px); }
}
.sk-btn__trail { transition: transform var(--sk-dur-base) var(--sk-ease-spring); }

.sk-btn__count {
  display: inline-grid; place-items: center;
  min-width: 18px; height: 18px; padding: 0 5px;
  border-radius: 99px;
  font-size: 11px; font-weight: var(--sk-weight-bold);
  background: rgb(0 0 0 / 0.08);
}
.sk-btn--solid .sk-btn__count { background: rgb(255 255 255 / 0.22); }

/* Button group: joined controls sharing borders. */
.sk-btn-group { display: inline-flex; isolation: isolate; }
.sk-btn-group > .sk-btn { border-radius: 0; }
.sk-btn-group > .sk-btn:first-child { border-start-start-radius: var(--r); border-end-start-radius: var(--r); }
.sk-btn-group > .sk-btn:last-child { border-start-end-radius: var(--r); border-end-end-radius: var(--r); }
.sk-btn-group > .sk-btn + .sk-btn { margin-inline-start: -1px; }
.sk-btn-group > .sk-btn:hover, .sk-btn-group > .sk-btn:focus-visible { z-index: 1; }
.sk-btn-group > .sk-btn--solid + .sk-btn--solid { margin-inline-start: 1px; }
.sk-btn-group--attached > .sk-btn--outline { box-shadow: none; }
.sk-btn-group--attached { border-radius: var(--sk-radius-control); box-shadow: var(--sk-shadow-xs); }

/* ======================================================================
 * Badge
 * ====================================================================== */
.sk-badge {
  --bh: 20px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: var(--bh);
  padding: 0 8px;
  border-radius: var(--sk-radius-full);
  border: 1px solid transparent;
  background: var(--t-soft);
  color: var(--t-text);
  font-size: 11.5px;
  font-weight: var(--sk-weight-semibold);
  line-height: 1;
  white-space: nowrap;
  vertical-align: middle;
  font-variant-numeric: tabular-nums;
}
.sk-badge > .sk-icon { width: 12px; height: 12px; margin-inline-start: -1px; }
.sk-badge--sm { --bh: 18px; padding: 0 6px; font-size: 10.5px; }
.sk-badge--lg { --bh: 24px; padding: 0 10px; font-size: var(--sk-text-xs); }
.sk-badge--solid { background: var(--t-solid); color: var(--t-on); }
.sk-badge--outline { background: transparent; border-color: var(--t-border); }
.sk-badge--surface { background: var(--sk-surface); border-color: var(--sk-border); color: var(--sk-fg-muted); }
.sk-badge.sk-tone-neutral:not(.sk-badge--solid) { color: var(--sk-fg-muted); }
.sk-badge__dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.sk-badge__dot--live { background: var(--t-solid); animation: sk-pulse-ring 1.6s var(--sk-ease-out) infinite; }

/* Count bubble for nav items and icons. */
.sk-count {
  display: inline-grid; place-items: center;
  min-width: 18px; height: 18px; padding: 0 5px;
  border-radius: 99px;
  background: var(--t-solid); color: var(--t-on);
  font-size: 10.5px; font-weight: var(--sk-weight-bold);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.sk-count--soft { background: var(--t-soft); color: var(--t-text); }

/* ======================================================================
 * Chip (filter / choice / removable)
 * ====================================================================== */
.sk-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: var(--sk-control-sm);
  padding: 0 12px;
  border-radius: 99px;
  border: 1px solid var(--sk-border);
  background: var(--sk-surface);
  color: var(--sk-fg-muted);
  font-size: var(--sk-text-sm);
  font-weight: var(--sk-weight-medium);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: background-color var(--sk-dur-fast), border-color var(--sk-dur-fast), color var(--sk-dur-fast), transform var(--sk-dur-base) var(--sk-ease-spring);
}
.sk-chip > .sk-icon { width: 15px; height: 15px; }
.sk-chip:hover { border-color: var(--sk-border-strong); color: var(--sk-fg); }
.sk-chip:active { transform: scale(0.96); }
.sk-chip--sm { height: 26px; padding: 0 10px; font-size: var(--sk-text-xs); }
.sk-chip__check { width: 0; opacity: 0; overflow: hidden; display: inline-flex; transition: width var(--sk-dur-base) var(--sk-ease-spring), opacity var(--sk-dur-fast); }
.sk-chip__check .sk-icon { width: 14px; height: 14px; stroke-width: 2.6; }
.sk-chip:has(input:checked), .sk-chip[aria-pressed="true"], .sk-chip.is-selected {
  background: var(--t-soft);
  border-color: var(--t-border-strong);
  color: var(--t-text);
}
.sk-chip:has(input:checked) .sk-chip__check, .sk-chip[aria-pressed="true"] .sk-chip__check, .sk-chip.is-selected .sk-chip__check { width: 14px; opacity: 1; }
.sk-chip:has(input:focus-visible) { outline: 2px solid var(--sk-focus); outline-offset: 2px; }
/* The input sits inside its chip, so a row of chips that scrolls never
 * widens the page through its hidden inputs. */
.sk-chip:has(> input) { position: relative; }
.sk-chip input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; pointer-events: none; }
.sk-chip__count { color: var(--sk-fg-subtle); font-variant-numeric: tabular-nums; font-size: 0.92em; }
.sk-chip__remove {
  display: inline-grid; place-items: center;
  width: 18px; height: 18px; margin-inline-end: -6px;
  border-radius: 50%;
  color: inherit; opacity: 0.6;
  transition: background-color var(--sk-dur-fast), opacity var(--sk-dur-fast);
}
.sk-chip__remove:hover { opacity: 1; background: rgb(var(--t-rgb) / 0.14); }
.sk-chip__remove .sk-icon { width: 12px; height: 12px; stroke-width: 2.4; }

/* ======================================================================
 * Avatar
 * ====================================================================== */
.sk-avatar {
  --size: 36px;
  position: relative;
  display: inline-grid;
  place-items: center;
  width: var(--size);
  height: var(--size);
  flex-shrink: 0;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--t-soft-hover), var(--t-soft-active));
  color: var(--t-text);
  font-family: var(--sk-font-display);
  font-size: calc(var(--size) * 0.38);
  font-weight: var(--sk-weight-bold);
  letter-spacing: -0.02em;
  line-height: 1;
  user-select: none;
}
.sk-avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }
.sk-avatar--xs { --size: 22px; font-family: var(--sk-font-sans); }
.sk-avatar--sm { --size: 28px; }
.sk-avatar--lg { --size: 48px; }
.sk-avatar--xl { --size: 72px; }
.sk-avatar--2xl { --size: 104px; }
.sk-avatar--square { border-radius: 28%; }
.sk-avatar--ring { box-shadow: 0 0 0 2px var(--sk-surface), 0 0 0 4px var(--t-solid); }
.sk-avatar__status {
  position: absolute;
  right: 0; bottom: 0;
  width: max(8px, calc(var(--size) * 0.27));
  height: max(8px, calc(var(--size) * 0.27));
  border-radius: 50%;
  background: var(--sk-ink-8);
  box-shadow: 0 0 0 2px var(--sk-surface);
}
.sk-avatar__status--online { background: var(--sk-green-9); }
.sk-avatar__status--busy { background: var(--sk-red-9); }
.sk-avatar__status--away { background: var(--sk-amber-9); }

.sk-avatar-group { display: inline-flex; align-items: center; }
.sk-avatar-group > .sk-avatar { box-shadow: 0 0 0 2px var(--sk-surface); transition: transform var(--sk-dur-base) var(--sk-ease-spring); }
.sk-avatar-group > .sk-avatar + .sk-avatar { margin-inline-start: calc(var(--size) * -0.28); }
@media (hover: hover) { .sk-avatar-group > .sk-avatar:hover { transform: translateY(-3px); z-index: 1; } }
.sk-avatar--more { background: var(--sk-surface-hover); color: var(--sk-fg-muted); font-family: var(--sk-font-sans); font-size: calc(var(--size) * 0.32); }

/* Person: avatar + name + meta, the most repeated pattern in the app. */
.sk-person { display: flex; align-items: center; gap: 10px; min-width: 0; }
.sk-person__text { display: flex; flex-direction: column; min-width: 0; }
.sk-person__name { font-weight: var(--sk-weight-semibold); color: var(--sk-fg); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sk-person__meta { font-size: var(--sk-text-xs); color: var(--sk-fg-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ======================================================================
 * Spinner, skeleton, kbd, divider
 * ====================================================================== */
.sk-spinner { width: var(--size, 18px); height: var(--size, 18px); color: currentColor; animation: sk-spin 0.75s linear infinite; }
.sk-spinner circle { fill: none; stroke: currentColor; stroke-width: 3; }
.sk-spinner__track { opacity: 0.2; }
.sk-spinner__arc { stroke-dasharray: 32 100; stroke-linecap: round; }

.sk-skeleton {
  display: block;
  height: var(--h, 12px);
  width: var(--w, 100%);
  border-radius: var(--r, 6px);
  background: linear-gradient(90deg, var(--sk-surface-hover) 0%, var(--sk-surface-hover) 40%, var(--sk-surface-active) 50%, var(--sk-surface-hover) 60%, var(--sk-surface-hover) 100%);
  background-size: 300% 100%;
  animation: sk-shimmer 1.6s ease-in-out infinite;
}
.sk-skeleton--circle { --r: 50%; width: var(--h); }
.sk-skeleton--text { --h: 10px; margin-block: 4px; }

.sk-kbd {
  display: inline-grid; place-items: center;
  min-width: 20px; height: 20px; padding: 0 5px;
  border-radius: 5px;
  border: 1px solid var(--sk-border);
  border-bottom-width: 2px;
  background: var(--sk-surface);
  color: var(--sk-fg-muted);
  font-family: var(--sk-font-sans);
  font-size: 11px;
  font-weight: var(--sk-weight-semibold);
  line-height: 1;
}

.sk-divider { border: 0; height: 1px; background: var(--sk-border-subtle); margin: 0; width: 100%; }
.sk-divider--label {
  display: flex; align-items: center; gap: 12px;
  height: auto; background: none;
  color: var(--sk-fg-subtle);
  font-size: var(--sk-text-xs);
  font-weight: var(--sk-weight-semibold);
}
.sk-divider--label::before, .sk-divider--label::after { content: ''; flex: 1; height: 1px; background: var(--sk-border-subtle); }

/* ======================================================================
 * Tooltip (one shared floating element, positioned by sukud-ui.js)
 * ====================================================================== */
.sk-tooltip {
  position: fixed;
  z-index: var(--sk-z-tooltip);
  top: 0; left: 0;
  max-width: min(260px, calc(100vw - 16px));
  padding: 6px 9px;
  border-radius: 8px;
  background: var(--sk-surface-inverse);
  color: var(--sk-fg-inverse);
  font-size: var(--sk-text-xs);
  font-weight: var(--sk-weight-medium);
  line-height: 1.35;
  box-shadow: var(--sk-shadow-md);
  pointer-events: none;
  opacity: 0;
  transform: translate(var(--x, 0), var(--y, 0)) scale(0.96);
  transition: opacity var(--sk-dur-fast) var(--sk-ease-out), transform var(--sk-dur-base) var(--sk-ease-spring);
}
.sk-tooltip.is-open { opacity: 1; transform: translate(var(--x, 0), var(--y, 0)) scale(1); }
.sk-tooltip .sk-kbd { height: 16px; min-width: 16px; font-size: 10px; margin-inline-start: 6px; background: rgb(255 255 255 / 0.12); border-color: rgb(255 255 255 / 0.18); color: inherit; }

/* ======================================================================
 * Theme toggle (icons cross-fade and spin as the mode changes)
 * ====================================================================== */
.sk-theme-toggle { position: relative; }
.sk-theme-toggle__icon {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  opacity: 0;
  transform: rotate(-90deg) scale(0.4);
  transition: opacity var(--sk-dur-base) var(--sk-ease-out), transform var(--sk-dur-slow) var(--sk-ease-spring);
}
:root[data-theme-mode="light"] [data-theme-icon="light"],
:root[data-theme-mode="dark"] [data-theme-icon="dark"],
:root[data-theme-mode="system"] [data-theme-icon="system"],
:root:not([data-theme-mode]) [data-theme-icon="system"] { opacity: 1; transform: none; }

/* Smooth cross-fade when the theme changes (View Transitions). */
::view-transition-old(root), ::view-transition-new(root) { animation-duration: 280ms; }