:root {
  color-scheme: light;
  --ink: oklch(27% 0.035 174);
  --muted: oklch(49% 0.025 174);
  --paper: oklch(97% 0.016 86);
  --surface: oklch(99% 0.009 86);
  --line: oklch(87% 0.022 86);
  --control-line: oklch(60% 0.025 174);
  --accent: oklch(56% 0.15 42);
  --green: oklch(40% 0.07 174);
  --soft-green: oklch(93% 0.025 174);
  --danger: oklch(52% 0.16 28);
  --shadow: 0 1.5rem 4rem oklch(24% 0.03 174 / 0.12);
  font-family: "Aptos", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); text-size-adjust: 100%; }
body { margin: 0; min-width: 0; min-height: 100dvh; background: radial-gradient(circle at 80% 5%, oklch(91% 0.07 72 / .55), transparent 28rem), var(--paper); -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: oklch(64% .15 42 / .18); }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: .2rem solid var(--accent); outline-offset: .15rem; }
[hidden] { display: none !important; }
.skip-link { position: fixed; top: .5rem; left: .5rem; z-index: 10; padding: .75rem 1rem; transform: translateY(-150%); background: var(--ink); color: var(--paper); }
.skip-link:focus { transform: translateY(0); }
.brand-mark { display: grid; width: 2.5rem; height: 2.5rem; place-items: center; border-radius: .75rem; background: var(--accent); color: var(--surface); font-weight: 800; }

.login-view { min-height: 100dvh; display: grid; align-content: space-between; gap: 4rem; padding: 1.25rem; }
.login-brand, .admin-brand { display: flex; align-items: center; gap: .75rem; color: inherit; text-decoration: none; font-weight: 700; }
.login-card { width: min(100%, 34rem); margin: 0 auto 8vh; padding: clamp(1.5rem, 5vw, 3.5rem); border: 1px solid var(--line); border-radius: 1.75rem; background: color-mix(in oklch, var(--surface) 92%, transparent); box-shadow: var(--shadow); }
.section-label, .view-heading p { margin: 0 0 .5rem; color: var(--accent); font-weight: 700; }
.login-card h1, .view-heading h1 { margin: 0; letter-spacing: -.045em; line-height: 1; }
.login-card h1 { max-width: 11ch; font-size: clamp(2.5rem, 8vw, 4.5rem); }
.login-card > p:not(.section-label, .form-status) { max-width: 46ch; color: var(--muted); line-height: 1.6; }
.login-card label, .day-editor label { display: grid; gap: .45rem; margin-top: 1rem; font-size: .9rem; font-weight: 700; }
input, select, textarea { min-height: 3rem; padding: .7rem .85rem; border: 1px solid var(--control-line); border-radius: .7rem; background: var(--surface); color: var(--ink); }
textarea { resize: vertical; line-height: 1.45; }
.login-card button, .day-editor > button:not(.secondary-action), .view-heading > button { width: 100%; min-height: 3rem; margin-top: 1.25rem; border: 0; border-radius: .7rem; background: var(--green); color: var(--surface); font-weight: 750; }
.day-editor > button.secondary-action { width: 100%; min-height: 3rem; margin-top: .75rem; border: 1px solid var(--line); border-radius: .7rem; background: var(--surface); color: var(--ink); font-weight: 750; }
.form-status { min-height: 1.4rem; margin: .75rem 0 0; color: var(--danger); }

.admin-header { position: sticky; top: 0; z-index: 4; display: flex; min-height: 4.5rem; align-items: center; justify-content: space-between; gap: 1rem; padding: .75rem max(1rem, env(safe-area-inset-right)) .75rem max(1rem, env(safe-area-inset-left)); border-bottom: 1px solid var(--line); background: color-mix(in oklch, var(--paper) 92%, transparent); -webkit-backdrop-filter: blur(.75rem); backdrop-filter: blur(.75rem); }
.admin-header > div { display: flex; align-items: center; gap: .6rem; }
.connection-state { display: none; color: var(--green); font-size: .82rem; font-weight: 700; }
.quiet-button, .admin-nav button, .panel-heading button { min-height: 2.75rem; border: 0; background: transparent; color: var(--muted); font-weight: 700; }
.admin-layout { min-height: calc(100dvh - 4.5rem); }
.admin-nav { position: fixed; inset: auto 0 0; z-index: 5; display: grid; grid-template-columns: repeat(3, 1fr); padding: .5rem max(.5rem, env(safe-area-inset-right)) max(.5rem, env(safe-area-inset-bottom)) max(.5rem, env(safe-area-inset-left)); border-top: 1px solid var(--line); background: var(--surface); }
.admin-nav button { border-radius: .6rem; font-size: .82rem; }
.admin-nav button.active { background: var(--soft-green); color: var(--green); }
.admin-content { padding: 1.5rem max(1rem, env(safe-area-inset-right)) 7rem max(1rem, env(safe-area-inset-left)); }
.admin-view { width: min(100%, 82rem); margin: auto; }
.view-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.75rem; }
.view-heading h1 { font-size: clamp(2.25rem, 8vw, 4.25rem); }
.view-heading > button { width: auto; padding-inline: 1rem; }
.metric-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); overflow: hidden; border: 1px solid var(--line); border-radius: 1.25rem; background: var(--surface); }
.metric-strip article { padding: 1.25rem 1rem; }
.metric-strip article + article { border-left: 1px solid var(--line); }
.metric-strip span { display: block; overflow: hidden; color: var(--muted); font-size: .78rem; text-overflow: ellipsis; }
.metric-strip strong { display: block; margin-top: .25rem; font-size: clamp(1.8rem, 7vw, 3.25rem); font-variant-numeric: tabular-nums; }
.split-layout { display: grid; gap: 1rem; margin-top: 1rem; }
.overview-tools { display: grid; align-content: start; gap: 1rem; }
.work-panel, .calendar-panel, .day-editor { padding: 1rem; border: 1px solid var(--line); border-radius: 1.25rem; background: var(--surface); }
.panel-heading { display: flex; align-items: center; justify-content: space-between; }
.panel-heading h2 { margin: 0; font-size: 1.15rem; }
.studio-note { padding: 1.5rem; border-radius: 1.25rem; background: var(--green); color: var(--surface); }
.studio-note span { color: oklch(89% .05 174); font-size: .85rem; }
.studio-note strong { display: block; max-width: 15ch; margin-top: 2rem; font-size: 1.8rem; line-height: 1.05; }
.studio-note p { color: oklch(90% .025 174); line-height: 1.5; }
.notification-control { display: grid; gap: 1rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: 1.25rem; background: var(--surface); }
.notification-heading { display: flex; align-items: start; gap: .75rem; }
.notification-heading h2 { margin: 0; font-size: 1rem; }
.notification-heading p { margin: .25rem 0 0; color: var(--muted); font-size: .82rem; line-height: 1.4; }
.notification-indicator { flex: 0 0 auto; width: .7rem; height: .7rem; margin-top: .3rem; border-radius: 50%; background: var(--control-line); box-shadow: 0 0 0 .25rem var(--line); }
.notification-control.active .notification-indicator { background: oklch(62% .13 154); box-shadow: 0 0 0 .25rem var(--soft-green); }
.notification-control.error .notification-indicator { background: var(--danger); box-shadow: 0 0 0 .25rem oklch(94% .04 25); }
.notification-control button { min-height: 2.85rem; border: 0; border-radius: .7rem; background: var(--green); color: var(--surface); font-weight: 800; }
.notification-control.active button { border: 1px solid var(--line); background: transparent; color: var(--ink); }
.notification-control button:disabled { cursor: not-allowed; opacity: .55; }
.notification-control small { color: var(--muted); line-height: 1.45; }
.empty-state { padding: 3rem 1rem; color: var(--muted); text-align: center; }
.compact-booking, .request-item { display: grid; gap: .55rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.compact-booking:last-child, .request-item:last-child { border-bottom: 0; }
.compact-booking strong, .request-item h3 { margin: 0; }
.compact-booking span, .request-meta { color: var(--muted); font-size: .88rem; }
.status-badge { width: fit-content; padding: .25rem .5rem; border-radius: .35rem; background: var(--soft-green); color: var(--green); font-size: .75rem; font-weight: 800; }
.status-badge.pending { background: oklch(93% .06 80); color: oklch(46% .1 60); }
.status-badge.rejected, .status-badge.cancelled { background: oklch(94% .04 25); color: var(--danger); }

.month-controls { display: flex; align-items: center; gap: .5rem; }
.month-controls button { width: 2.75rem; height: 2.75rem; border: 1px solid var(--control-line); border-radius: .65rem; background: var(--surface); }
.month-controls strong { min-width: 7rem; text-align: center; }
.calendar-layout { display: grid; gap: 1rem; }
.calendar-tools { display: grid; align-content: start; gap: .75rem; }
.availability-legend { display: flex; flex-wrap: wrap; gap: .55rem 1rem; margin-bottom: .75rem; padding-bottom: .75rem; border-bottom: 1px solid var(--line); }
.availability-legend span { display: inline-flex; align-items: center; gap: .4rem; color: var(--muted); font-size: .75rem; font-weight: 700; }
.availability-legend i { width: .65rem; height: .65rem; border-radius: 50%; }
.availability-legend i.available { background: oklch(62% .13 154); }
.availability-legend i.limited { background: oklch(73% .14 72); }
.availability-legend i.blocked { background: oklch(58% .17 28); }
.availability-legend i.past { background: oklch(72% .015 174); }
.weekday-row, .admin-calendar { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: .2rem; }
.weekday-row span { padding: .45rem 0; color: var(--muted); font-size: .7rem; text-align: center; }
.admin-day { position: relative; display: grid; min-height: 3rem; place-content: center; gap: .1rem; border: 1px solid transparent; border-radius: .55rem; background: transparent; color: var(--ink); }
.admin-day:hover:not(:disabled) { border-color: var(--green); }
.admin-day > span { font-weight: 800; }
.admin-day > small { display: none; font-size: .58rem; font-weight: 750; }
.admin-day.available:not(.selected) { background: oklch(94% .045 154); color: oklch(36% .09 154); }
.admin-day.limited:not(.selected) { background: oklch(94% .065 78); color: oklch(43% .12 65); }
.admin-day.selected { background: var(--green); color: var(--surface); }
.admin-day.blocked:not(.selected) { background: oklch(94% .045 25); color: var(--danger); }
.admin-day.past { cursor: not-allowed; background: oklch(94% .008 174); color: oklch(52% .015 174); text-decoration: line-through; }
.admin-day.has-booking:not(.selected)::after { content: ""; position: absolute; top: .3rem; right: .3rem; width: .35rem; height: .35rem; border: 2px solid var(--surface); border-radius: 50%; background: var(--accent); }
.admin-day.empty { pointer-events: none; }
.day-editor h2, .day-editor p { margin: 0 0 .5rem; }
.day-editor > p { color: var(--muted); }
.day-editor fieldset { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; margin: 1rem 0 0; padding: 0; border: 0; }
.day-editor legend { margin-bottom: .65rem; font-size: .9rem; font-weight: 700; }
.slot-check { display: flex; min-height: 2.75rem; align-items: center; gap: .4rem; padding: .55rem; border: 1px solid var(--control-line); border-radius: .55rem; font-size: .85rem; }
.slot-check input { min-height: auto; }
.slot-check span { font-weight: 800; }
.slot-check small { margin-left: auto; color: var(--muted); font-size: .7rem; }
.slot-check.expired { border-style: dashed; background: oklch(95% .01 174); color: oklch(50% .015 174); text-decoration: line-through; }
.slot-check.reserved { border-color: oklch(82% .08 72); background: oklch(96% .04 78); }
.slot-check.reserved small { color: oklch(45% .11 65); font-weight: 800; }
.field-help { display: block; margin-top: .45rem; color: var(--muted); font-size: .78rem; line-height: 1.4; }
.schedule-builder { overflow: hidden; border: 1px solid var(--line); border-radius: 1.25rem; background: var(--surface); }
.schedule-builder summary { display: grid; min-height: 4.5rem; align-content: center; padding: .9rem 1rem; cursor: pointer; list-style: none; }
.schedule-builder summary::-webkit-details-marker { display: none; }
.schedule-builder summary::after { content: "+"; grid-area: 1 / 2 / 3; align-self: center; justify-self: end; color: var(--accent); font-size: 1.5rem; }
.schedule-builder[open] summary::after { content: "−"; }
.schedule-builder summary span { color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }
.schedule-builder summary strong { font-size: 1rem; }
.schedule-preview { display: grid; gap: .35rem; padding: .85rem; border-radius: .8rem; background: var(--ink); color: var(--surface); }
.schedule-preview span { color: oklch(79% .08 72); font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.schedule-preview strong { font-size: 1.1rem; line-height: 1.3; }
.schedule-preview small { color: oklch(82% .02 174); line-height: 1.45; }
.schedule-rule-form { display: grid; gap: 1rem; padding: 0 1rem 1rem; color: var(--ink); }
.schedule-rule-form fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
.schedule-rule-form legend { margin-bottom: .7rem; font-size: .88rem; font-weight: 800; }
.schedule-rule-form label { display: grid; gap: .4rem; color: var(--muted); font-size: .78rem; font-weight: 750; }
.date-range-fields, .time-range-fields { display: grid; gap: .75rem; }
.schedule-presets { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: .75rem; }
.schedule-presets button { min-height: 2.75rem; padding: .55rem .75rem; border: 1px solid var(--control-line); border-radius: 999px; background: transparent; color: var(--ink); font-size: .78rem; font-weight: 750; }
.schedule-presets button.active { border-color: var(--accent); background: color-mix(in oklch, var(--accent) 14%, var(--surface)); color: oklch(40% .14 42); }
.weekday-picker { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .4rem; }
.weekday-picker label { position: relative; display: block; cursor: pointer; }
.weekday-picker input { position: absolute; width: 1px; min-height: 1px; opacity: 0; }
.weekday-picker span { display: grid; min-height: 2.75rem; place-items: center; border: 1px solid var(--control-line); border-radius: .65rem; background: var(--surface); color: var(--muted); font-size: .78rem; font-weight: 800; }
.weekday-picker input:checked + span { border-color: var(--green); background: var(--soft-green); color: var(--green); }
.weekday-picker input:focus-visible + span { outline: .2rem solid var(--accent); outline-offset: .15rem; }
.generated-slots { display: flex; min-height: 2.75rem; flex-wrap: wrap; align-content: flex-start; gap: .4rem; padding: .7rem; border: 1px dashed var(--line); border-radius: .8rem; color: var(--muted); font-size: .8rem; }
.generated-slots span { padding: .35rem .5rem; border-radius: .45rem; background: var(--soft-green); color: var(--green); font-weight: 800; font-variant-numeric: tabular-nums; }
.apply-schedule-button { min-height: 3.25rem; border: 0; border-radius: .75rem; background: var(--accent); color: var(--surface); font-weight: 800; }
.apply-schedule-button:disabled { cursor: not-allowed; opacity: .55; }
.schedule-rule-form .form-status { color: var(--danger); }
.schedule-rule-form .form-status.success { color: var(--green); }
.request-list { border-top: 1px solid var(--line); }
.request-item { padding-block: 1.25rem; }
.request-top { display: flex; align-items: start; justify-content: space-between; gap: .75rem; }
.request-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.request-actions button { min-height: 2.65rem; padding: .55rem .8rem; border: 1px solid var(--line); border-radius: .55rem; background: var(--surface); color: var(--ink); font-weight: 700; }
.request-actions button.primary { border-color: var(--green); background: var(--green); color: var(--surface); }

@media (min-width: 48rem) {
  .connection-state { display: inline; }
  .admin-content { padding: 2.5rem 2rem 5rem; }
  .metric-strip article { padding: 1.75rem; }
  .split-layout { grid-template-columns: minmax(0, 2fr) minmax(16rem, .8fr); }
  .calendar-layout { grid-template-columns: minmax(0, 1.7fr) minmax(17rem, .7fr); }
  .admin-day { min-height: 4.5rem; }
  .admin-day > small { display: block; }
  .day-editor fieldset { grid-template-columns: 1fr; }
  .date-range-fields, .time-range-fields { grid-template-columns: 1fr; }
  .weekday-picker { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .admin-layout { display: grid; grid-template-columns: 12rem 1fr; }
  .admin-nav { position: sticky; inset: 4.5rem auto auto 0; align-self: start; display: flex; height: calc(100dvh - 4.5rem); flex-direction: column; gap: .25rem; padding: 1.25rem .75rem; border-top: 0; border-right: 1px solid var(--line); background: transparent; }
  .admin-nav button { padding-inline: 1rem; text-align: left; }
  .admin-content { min-width: 0; }
}

@media (prefers-reduced-motion: no-preference) {
  button { transition: transform 180ms ease-out, background-color 180ms ease-out, color 180ms ease-out; }
  button:active { transform: translateY(.08rem); }
}

@media (prefers-contrast: more) {
  :root { --line: var(--control-line); }
  .work-panel, .calendar-panel, .day-editor, .schedule-builder, .metric-strip { border-color: var(--control-line); }
}