/* Apple design language theme for Refine-o-matic.
   Apple system colours (grouped backgrounds, labels, fills), Defensie orange as the app tint,
   translucent materials, inset grouped lists, large titles, size-specific tracking,
   press feedback on pointer-down and interruptible motion. */

:root {
  --tint: #e17000;
  --tint-pressed: #c86300;
  --on-tint: #fff;
  --bg: #f2f2f7;                   /* systemGroupedBackground */
  --surface: #fff;                 /* secondarySystemGroupedBackground */
  --surface-raised: #fff;
  --fill: rgba(120,120,128,.12);   /* tertiarySystemFill */
  --fill-strong: rgba(120,120,128,.2);
  --label: #000;
  --label-2: rgba(60,60,67,.6);
  --label-3: rgba(60,60,67,.3);
  --separator: rgba(60,60,67,.29);
  --material: rgba(249,249,249,.72);
  --material-edge: rgba(0,0,0,.1);
  --green: #248a3d;                /* accessible systemGreen on white */
  --red: #d70015;
  --shadow-card: 0 1px 2px rgba(0,0,0,.05), 0 6px 20px rgba(0,0,0,.05);
  --shadow-key: 0 1px 2px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.06);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  --font-rounded: ui-rounded, "SF Pro Rounded", -apple-system, "Segoe UI", system-ui, sans-serif;
  --radius: 14px;
  --spring: cubic-bezier(.2, .9, .25, 1);   /* critically-damped feel for non-gesture motion */
  color-scheme: light;
}
:root[data-theme="dark"] {
  --tint: #ff9f0a;
  --tint-pressed: #e08a00;
  --on-tint: #000;
  --bg: #000;
  --surface: #1c1c1e;
  --surface-raised: #2c2c2e;
  --fill: rgba(118,118,128,.24);
  --fill-strong: rgba(118,118,128,.36);
  --label: #fff;
  --label-2: rgba(235,235,245,.6);
  --label-3: rgba(235,235,245,.3);
  --separator: rgba(84,84,88,.6);
  --material: rgba(30,30,30,.72);
  --material-edge: rgba(255,255,255,.1);
  --green: #30d158;
  --red: #ff453a;
  --shadow-card: none;
  --shadow-key: inset 0 0 0 .5px rgba(255,255,255,.08);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 400 1.0625rem/1.4 var(--font);   /* 17pt body */
  letter-spacing: -0.01em;
  background: var(--bg); color: var(--label);
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s ease, color .35s ease; /* no hard brightness jump on theme change */
}
button, input, select { font: inherit; color: inherit; letter-spacing: inherit; }
button { touch-action: manipulation; -webkit-tap-highlight-color: transparent; cursor: pointer; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--tint) 60%, transparent); outline-offset: 2px; border-radius: 10px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.container {
  max-width: 42rem; margin: 0 auto;
  padding: 0 max(1.25rem, env(safe-area-inset-right)) 2rem max(1.25rem, env(safe-area-inset-left));
}

/* ---------- Translucent navigation bar: content scrolls underneath ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  padding-top: env(safe-area-inset-top);
  background: var(--material);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: .5px solid transparent;
  transition: border-color .2s ease;
}
.site-header.scrolled { border-bottom-color: var(--material-edge); } /* edge only when content is under it */
.header-inner {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem;
  min-height: 2.75rem; padding-top: .25rem; padding-bottom: .25rem;
}
.brand {
  font-weight: 600; font-size: 1.0625rem; letter-spacing: -0.02em;
  color: var(--label); text-decoration: none; white-space: nowrap;
}
.header-actions { display: flex; align-items: center; gap: 0; min-width: 0; }
.nav-session { display: flex; flex-direction: column; align-items: flex-end; min-width: 0; line-height: 1.2; margin-right: .25rem; }
.nav-session-label { font-size: .6875rem; color: var(--label-2); text-transform: uppercase; letter-spacing: .04em; }
.nav-session-name {
  font-size: .9375rem; font-weight: 600; color: var(--label);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 14rem;
}

/* Icon buttons: 32px tinted circle, 44px hit area */
.icon-button {
  position: relative; display: inline-grid; place-items: center; flex: none;
  width: 2rem; height: 2rem; margin: .375rem; padding: 0;
  border: 0; border-radius: 50%;
  background: var(--fill); color: var(--tint);
  transition: opacity .15s ease, transform .25s var(--spring);
}
.icon-button::after { content: ""; position: absolute; inset: -.375rem; } /* enlarge touch target */
.icon-button:active { opacity: .5; transform: scale(.9); transition-duration: .05s; } /* feedback on press */
.icon-button svg {
  width: 1.125rem; height: 1.125rem;
  fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.icon-button svg .dot { fill: currentColor; stroke: none; }
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

/* ---------- Large titles and section labels ---------- */
h1 {
  font: 700 2.125rem/1.1 var(--font-display);   /* 34pt, tight leading */
  letter-spacing: -0.025em;                     /* negative tracking for large text */
  margin: 1rem 0 .25rem; overflow-wrap: anywhere;
}
.lead, .progress { color: var(--label-2); font-size: .9375rem; letter-spacing: -0.005em; margin: 0; }
.section-title, .tray-title {
  font: 400 .8125rem/1.3 var(--font); letter-spacing: .01em; text-transform: uppercase;
  color: var(--label-2); margin: 1.75rem 1rem .4rem;
}

/* ---------- Join form: inset grouped rows ---------- */
.panel { margin-top: 1.75rem; }
.field {
  display: flex; align-items: center; gap: .75rem;
  min-height: 2.875rem; padding: 0 1rem; background: var(--surface); position: relative;
}
.field:first-child { border-radius: var(--radius) var(--radius) 0 0; box-shadow: var(--shadow-card); }
.field + .field { border-radius: 0 0 var(--radius) var(--radius); box-shadow: var(--shadow-card); }
.field + .field::before {
  content: ""; position: absolute; top: 0; left: 1rem; right: 0; height: .5px; background: var(--separator);
}
.field label { width: 7.5rem; flex: none; }
.field input {
  flex: 1; min-width: 0; border: 0; background: none; outline: none;
  padding: .75rem 0; font-size: 1.0625rem; /* ≥16px: no iOS zoom */
}
.field input::placeholder { color: var(--label-3); }
.field:focus-within label { color: var(--tint); }

.error { color: var(--red); font-size: .9375rem; min-height: 1.4em; margin: .5rem 1rem 0; }

/* ---------- Buttons ---------- */
.btn {
  border: 0; border-radius: 12px; min-height: 3.125rem; padding: .75rem 1.25rem;
  font-weight: 600; font-size: 1.0625rem; letter-spacing: -0.015em;
  transition: transform .3s var(--spring), background-color .2s ease, opacity .2s ease;
}
.btn:active:not(:disabled) { transform: scale(.97); transition-duration: .08s; } /* feedback on press */
.btn-primary { background: var(--tint); color: var(--on-tint); }
.btn-primary:active:not(:disabled) { background: var(--tint-pressed); }
.btn-secondary { background: color-mix(in srgb, var(--tint) 15%, transparent); color: var(--tint); }
.btn:disabled { opacity: .35; cursor: default; }
#join-form .btn { width: 100%; margin-top: .75rem; }
.actions { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-top: 1.25rem; }

/* ---------- Team: inset grouped list ---------- */
.people {
  list-style: none; margin: 0; padding: 0;
  background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card);
}
.person {
  display: flex; align-items: center; gap: .875rem;
  min-height: 3.5rem; padding: .5rem 1rem; position: relative;
  transition: opacity .3s ease;
}
.person + .person::before {
  content: ""; position: absolute; top: 0; right: 0; left: 4.125rem; height: .5px; background: var(--separator);
}
.person.offline { opacity: .45; }
.avatar {
  width: 2.25rem; height: 2.25rem; flex: none; border-radius: 50%;
  display: grid; place-items: center;
  font: 600 .875rem var(--font-rounded); letter-spacing: 0; color: #fff;
}
.avatar-0 { background: #ff9500; } .avatar-1 { background: #34c759; } .avatar-2 { background: #007aff; }
.avatar-3 { background: #af52de; } .avatar-4 { background: #ff2d55; } .avatar-5 { background: #30b0c7; }
.who { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.person-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.person-name .you { color: var(--label-2); }
.status { font-size: .8125rem; color: var(--label-2); letter-spacing: 0; }
.status.ready { color: var(--green); }

/* Mini card flips over on reveal */
.mini { width: 2rem; height: 2.75rem; flex: none; perspective: 400px; }
.mini-inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d; transition: transform .55s var(--spring);
}
.mini.revealed .mini-inner { transform: rotateY(180deg); }
.mini-face {
  position: absolute; inset: 0; border-radius: 6px;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  display: grid; place-items: center;
  font: 700 1rem var(--font-rounded); letter-spacing: 0; font-variant-numeric: tabular-nums;
}
.mini-back { background: var(--fill); border: 1.5px dashed var(--label-3); transition: background-color .25s ease; }
.mini.voted .mini-back {
  border: 0; background-color: var(--tint);
  background-image: linear-gradient(135deg, rgba(255,255,255,.28), rgba(255,255,255,0) 60%);
}
.mini-front { transform: rotateY(180deg); background: var(--surface-raised); border: 1.5px solid var(--fill-strong); color: var(--label); }

/* Result card slides in on reveal */
.summary {
  margin-top: 1rem; padding: 1.125rem 1.25rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1.5rem;
  background: linear-gradient(135deg, var(--tint), var(--tint-pressed));
  color: var(--on-tint);
  border-radius: 20px;
  box-shadow: 0 10px 30px color-mix(in srgb, var(--tint) 35%, transparent);
  transition: opacity .35s ease, transform .5s var(--spring);
}
.summary:not(.shown) {
  opacity: 0; transform: translateY(12px) scale(.96); pointer-events: none;
  position: absolute; visibility: hidden;   /* takes no space while hidden */
}
.summary.is-consensus {
  background: linear-gradient(135deg, #34c759, #248a3d); color: #fff;
  box-shadow: 0 10px 30px rgba(52, 199, 89, .35);
}
.summary-main { display: flex; flex-direction: column; }
.summary-label { font-size: .9375rem; font-weight: 600; letter-spacing: -0.01em; opacity: .85; }
.summary .big {
  font: 700 4rem/1 var(--font-rounded); letter-spacing: -0.04em; font-variant-numeric: tabular-nums;
}
.summary-side { display: flex; flex-direction: column; gap: .5rem; flex: 1 1 12rem; min-width: 0; }
.summary .meta { font-size: .9375rem; font-weight: 600; letter-spacing: -0.01em; }
/* Votes per card: rounded bars (motion.css) in the card's own colour */
.bar-v { font: 700 1rem var(--font-rounded); letter-spacing: 0; }
.bar-row { letter-spacing: 0; }

/* Lowest / highest estimate: replaces the status line */
.person .tag:empty { display: none; }
.person.extreme .status { display: none; }
.person .tag { font-size: .8125rem; font-weight: 600; color: var(--tint); letter-spacing: 0; }

/* Cards can't be picked after reveal: hide the tray so the result owns the screen */
#room-view.is-revealed .tray { display: none; }
#room-view.is-revealed { padding-bottom: calc(2rem + env(safe-area-inset-bottom)) !important; }

/* ---------- Card tray: floating material, thumb-reachable ---------- */
#room-view { padding-bottom: calc(14rem + env(safe-area-inset-bottom)); }
.tray {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 15;
  padding: .5rem 0 calc(.75rem + env(safe-area-inset-bottom));
  background: var(--material);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  backdrop-filter: blur(24px) saturate(180%);
  border-top: .5px solid var(--material-edge);
}
.tray-inner {
  max-width: 42rem; margin: 0 auto;
  padding: 0 max(1.25rem, env(safe-area-inset-right)) 0 max(1.25rem, env(safe-area-inset-left));
}
.tray-title { margin: .25rem .25rem 0; }
.deck { display: grid; grid-template-columns: repeat(9, 1fr); gap: .5rem; padding-top: 14px; }
.card {
  aspect-ratio: 5 / 7; border: 0; border-radius: 12px;
  background: var(--surface-raised); color: var(--label); box-shadow: var(--shadow-key);
  font: 700 1.375rem var(--font-rounded); letter-spacing: -0.02em; font-variant-numeric: tabular-nums;
  user-select: none; -webkit-user-select: none;
  transition: transform .4s var(--spring), background-color .2s ease, color .2s ease, rotate .3s ease-out;
}
.card:active:not(:disabled) { transform: scale(.94); transition-duration: .08s; } /* instant press */
.card[aria-pressed="true"] { background: var(--tint); color: var(--on-tint); transform: translateY(-10px); }
.card[aria-pressed="true"]:active:not(:disabled) { transform: translateY(-10px) scale(.94); }
.card:disabled { opacity: .35; cursor: default; }

@media (max-width: 34rem) {
  .deck { grid-template-columns: repeat(5, 1fr); }
  #room-view { padding-bottom: calc(17rem + env(safe-area-inset-bottom)); }
  .header-inner { gap: .5rem; }
  .nav-session-name { max-width: 7rem; }
  .field label { width: 6.25rem; }
}

/* Clock (shared.css): rounded digits, like the iOS status bar */
:root .clock { font-family: var(--font-rounded); font-weight: 600; font-size: 1.0625rem; color: var(--label); letter-spacing: 0; }

/* Motion colours (motion.css) */
:root {
  --motion-accent: var(--tint);
  --motion-ok: var(--green);
  --motion-track: var(--fill);
  --motion-muted: var(--label-2);
  --motion-confetti: #5ac8fa;
  --motion-radius: 999px;
  --switch-off: var(--fill-strong);
}
.meter { margin-top: .5rem; }
/* Observer switch as its own inset-grouped row, like iOS Settings */
:root .switch-row {
  margin: 1rem 0 0; padding: .75rem 1rem;
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow-card);
}
.switch-text small { color: var(--label-2); opacity: 1; }

/* Theme menu (menu.css): floating material, rounded, anchored to the palette button */
:root {
  --menu-bg: var(--material);
  --menu-fg: var(--label);
  --menu-border: var(--material-edge);
  --menu-hover: var(--fill);
  --menu-accent: var(--tint);
  --menu-radius: 14px;
  --menu-item-radius: 9px;
  --menu-shadow: 0 10px 40px rgba(0, 0, 0, .18);
}
.design-menu { -webkit-backdrop-filter: blur(30px) saturate(180%); backdrop-filter: blur(30px) saturate(180%); }
:root .design-menu-title { text-transform: none; letter-spacing: 0; font-weight: 400; font-size: .8125rem; }
@media (prefers-reduced-transparency: reduce) {
  :root .design-menu { background: var(--surface); -webkit-backdrop-filter: none; backdrop-filter: none; }
}

/* ---------- Accessibility preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; transition-delay: 0ms !important; }
  .mini-inner, .mini.revealed .mini-inner { transform: none; }
  .mini-front { transform: none; opacity: 0; }            /* cross-fade instead of the 3D flip */
  .mini.revealed .mini-back { opacity: 0; }
  .mini.revealed .mini-front { opacity: 1; }
  .card[aria-pressed="true"] { transform: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .site-header, .tray { background: var(--surface); -webkit-backdrop-filter: none; backdrop-filter: none; }
}
@media (prefers-contrast: more) {
  :root { --label-2: var(--label); }
  .people, .card, .summary, .field { box-shadow: none; outline: 1px solid var(--label-2); }
}