@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,600;0,900;1,400&display=swap');

/* ═══════════════════════════════════════════
   Design tokens
═══════════════════════════════════════════ */
:root {
  --primary:         #9fe870;
  --on-primary:      #0e0f0c;
  --primary-active:  #cdffad;
  --primary-pale:    #e2f6d5;
  --ink:             #0e0f0c;
  --body:            #454745;
  --mute:            #868685;
  --canvas:          #ffffff;
  --canvas-soft:     #e8ebe6;
  --positive:        #2ead4b;
  --positive-deep:   #054d28;
  --negative:        #d03238;
  --negative-bg:     #320707;

  --r-sm:   8px;
  --r-md:   12px;
  --r-lg:   16px;
  --r-xl:   24px;
  --r-pill: 9999px;

  --sp-xs:  4px;
  --sp-sm:  8px;
  --sp-md:  12px;
  --sp-lg:  16px;
  --sp-xl:  24px;
  --sp-2xl: 32px;
  --sp-3xl: 48px;
}

/* ═══════════════════════════════════════════
   Reset
═══════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--canvas-soft);
  color: var(--ink);
  font-size: 16px;
  line-height: 24px;
  /* Viewport lock — desktop only */
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img, video { max-width: 100%; display: block; }

/* ═══════════════════════════════════════════
   Device tab switcher (inline in eyebrow)
═══════════════════════════════════════════ */
.device-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}
.device-tabs a {
  font-size: 13px;
  font-weight: 600;
  color: var(--mute);
  padding: 6px 14px;
  border-radius: var(--r-pill);
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.device-tabs a:hover   { color: var(--ink); background: rgba(14,15,12,.06); }
.device-tabs a.active  { background: var(--primary); color: var(--on-primary); }

/* ═══════════════════════════════════════════
   Page layout — flex row (macbook / generic)
═══════════════════════════════════════════ */
.page-main {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: row;
  gap: var(--sp-xl);
  padding: var(--sp-lg) var(--sp-xl) var(--sp-xl);
  overflow: hidden;
}

/* Chromebook override — 3-row grid: header / main-area / bottom-strip */
.page-chromebook {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  grid-template-areas:
    "eyebrow"
    "main"
    "bottom";
  row-gap: var(--sp-sm);
}

.page-chromebook .page-eyebrow { grid-area: eyebrow; }

/* Middle row: webcam sidebar + keyboard */
.cb-main {
  grid-area: main;
  display: flex;
  gap: var(--sp-lg);
  min-height: 0;
}

/* Webcam sidebar card */
.cb-cam-card {
  width: 220px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

/* Video wrapper fills card height, contain so nothing is cropped */
.cam-video-wrap {
  flex: 1;
  min-height: 0;
  background: #111;
  border-radius: var(--r-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#webcam-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: none;
  transition: opacity .3s;
}

/* Override: col-keyboard is now flex inside cb-main, not a grid item */
.page-chromebook .col-keyboard {
  grid-area: unset;
  flex: 1;
}

/* Bottom strip: mic + battery + speaker */
.cb-bottom {
  grid-area: bottom;
  display: flex;
  gap: var(--sp-lg);
  height: 152px;
  flex-shrink: 0;
}
.cb-bottom .hw-card   { flex: 1; overflow: hidden; }
.cb-bottom .hwc-value { font-size: 26px; }
.cb-bottom .mic-peak  { font-size: 15px; letter-spacing: 0; }

/* Card status colors — applied via JS on webcam / mic */
.hw-card--ok {
  background: #f0fbf3;
  border: 1.5px solid rgba(46,173,75,.35);
  box-shadow: 0 0 0 4px rgba(46,173,75,.06);
}
.hw-card--error {
  background: #fdf2f2;
  border: 1.5px solid rgba(208,50,56,.35);
  box-shadow: 0 0 0 4px rgba(208,50,56,.06);
}

/* Keyboard column */
.col-keyboard {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}
.page-chromebook .col-keyboard { grid-area: keyboard; flex: unset; }

/* Right column: hardware tests (macbook / generic) */
.col-hw {
  width: 300px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
}

/* Page eyebrow */
.page-eyebrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-lg);
  flex-shrink: 0;
}
.eyebrow-left {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.eyebrow-left h1 {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.5px;
  white-space: nowrap;
}
.eyebrow-left p {
  font-size: 13px;
  color: var(--mute);
}
.eyebrow-right {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  flex-shrink: 0;
}

/* Language switcher */
.lang-select {
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--mute);
  background: transparent;
  border: 1.5px solid rgba(14,15,12,.11);
  border-radius: var(--r-pill);
  padding: 5px 10px;
  cursor: pointer;
  outline: none;
  transition: color .15s, border-color .15s;
  -webkit-appearance: none;
  appearance: none;
  min-width: 54px;
  text-align: center;
}
.lang-select:hover {
  color: var(--ink);
  border-color: rgba(14,15,12,.2);
}
.lang-select:focus {
  border-color: var(--primary);
  color: var(--ink);
}

/* ═══════════════════════════════════════════
   Keyboard panel (left column, fills height)
═══════════════════════════════════════════ */
.keyboard-panel {
  flex: 1;
  min-height: 0;
  background: var(--canvas);
  border-radius: var(--r-xl);
  padding: var(--sp-xl) var(--sp-xl) var(--sp-lg);
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
  overflow: hidden;
}

.keyboard-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-shrink: 0;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}

.key-counter-row {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}
.key-counter-label { font-size: 13px; color: var(--mute); }
.key-counter-pct {
  font-size: 20px;
  font-weight: 900;
  min-width: 64px;
  text-align: right;
  transition: color .3s;
}
.key-counter-pct.done { color: var(--positive-deep); }
.key-counter-pct.bump { animation: counter-bump .35s ease-out; }

@keyframes counter-bump {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.18); color: var(--positive); }
  100% { transform: scale(1); }
}

/* Progress bar */
.progress-track {
  height: 5px;
  background: var(--canvas-soft);
  border-radius: var(--r-pill);
  overflow: hidden;
  flex-shrink: 0;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--primary);
  border-radius: var(--r-pill);
  transition: width .4s cubic-bezier(.4,0,.2,1), background .4s;
}
.progress-bar.done { background: var(--positive); }

/* Keyboard scroll area — flex: 1 so it fills remaining panel height */
.keyboard-scroll {
  flex: 1;
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  display: flex;
  align-items: center;
  position: relative; /* anchor for crit numbers */
}

/* Crit hit number — single element above keyboard, restarts on each keypress */
.key-crit {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  transform-origin: top center;
  pointer-events: none;
  z-index: 20;
  font-size: 52px;
  font-weight: 900;
  letter-spacing: -2px;
  color: var(--primary);
  text-shadow: 0 0 20px rgba(159,232,112,.5), 0 2px 8px rgba(0,0,0,.15);
  user-select: none;
  white-space: nowrap;
  opacity: 0;
}
.key-crit.key-crit-pop {
  animation: crit-pop .55s cubic-bezier(.22,.61,.36,1) forwards;
}
@keyframes crit-pop {
  0%   { transform: translateX(-50%) scale(1.7); opacity: 1; }
  40%  { transform: translateX(-50%) scale(1.1); opacity: 1; }
  100% { transform: translateX(-50%) scale(0.8); opacity: 0; }
}

/* Keyboard grid */
.keyboard {
  --ku: 44px;
  --kg: 5px;
  display: flex;
  flex-direction: column;
  gap: var(--kg);
  user-select: none;
  touch-action: none;
  margin: auto; /* centers within the flex scroll area */
}

.key-row {
  display: flex;
  gap: var(--kg);
  flex-shrink: 0;
}

/* Base key */
.key {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--ku);
  height: var(--ku);
  flex-shrink: 0;
  border-radius: var(--r-sm);
  background: var(--canvas-soft);
  border: 1.5px solid rgba(14,15,12,.11);
  font-size: 11px;
  font-weight: 600;
  color: var(--body);
  cursor: default;
  text-align: center;
  line-height: 1.2;
  padding: 2px;
  position: relative;
  /* smooth hover */
  transition: background .1s, border-color .1s, color .1s, box-shadow .1s;
  will-change: transform;
}
.key:hover:not(.key-pressed) {
  background: #dde0db;
  border-color: rgba(14,15,12,.2);
  box-shadow: 0 2px 6px rgba(14,15,12,.06);
}

/* Pressed state */
.key.key-pressed {
  background: var(--primary);
  border-color: transparent;
  color: var(--on-primary);
  box-shadow: 0 0 0 3px rgba(159,232,112,.3);
}

/* Flash animation on press */
.key.key-flash {
  animation: key-pop .28s cubic-bezier(.22,.61,.36,1) forwards;
}
@keyframes key-pop {
  0%   { transform: scale(0.82); box-shadow: 0 0 0 6px rgba(159,232,112,.25); }
  55%  { transform: scale(1.07); }
  100% { transform: scale(1);    box-shadow: 0 0 0 3px rgba(159,232,112,.3); }
}

/* Function row icons */
.key-fn {
  font-size: 15px;
  color: var(--mute);
}
.key-fn.key-pressed { color: var(--on-primary); }

/* Key width variants */
.key-1-25u { width: calc(1.25 * var(--ku) + 0.25 * var(--kg)); }
.key-1-5u  { width: calc(1.5  * var(--ku) + 0.5  * var(--kg)); }
.key-1-75u { width: calc(1.75 * var(--ku) + 0.75 * var(--kg)); }
.key-2u    { width: calc(2    * var(--ku) + 1    * var(--kg)); }
.key-2-25u { width: calc(2.25 * var(--ku) + 1.25 * var(--kg)); }
.key-2-75u { width: calc(2.75 * var(--ku) + 1.75 * var(--kg)); }
.key-6-25u { width: calc(6.25 * var(--ku) + 5.25 * var(--kg)); }
.key-half-h { height: calc(0.5 * var(--ku) - 0.5 * var(--kg)); }

.arrow-cluster { display: flex; flex-direction: column; gap: var(--kg); }
.arrow-top-row, .arrow-bot-row { display: flex; gap: var(--kg); }

/* Keyboard tip */
.keyboard-tip {
  font-size: 12px;
  color: var(--mute);
  line-height: 18px;
  flex-shrink: 0;
  padding-top: var(--sp-xs);
}

/* ═══════════════════════════════════════════
   HW cards
═══════════════════════════════════════════ */
/* Shared card chrome — used by all pages */
.hw-card-right,
.hw-card {
  flex: 1;
  min-height: 0;
  background: var(--canvas);
  border-radius: var(--r-xl);
  padding: var(--sp-lg) var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  cursor: default;
  transition: transform .2s ease, box-shadow .2s ease;
}
.hw-card-right:hover,
.hw-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(14,15,12,.09);
}

.hwc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-sm);
  flex-shrink: 0;
}
.hwc-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--mute);
  text-transform: uppercase;
  letter-spacing: .6px;
}

/* Battery value */
.hwc-value {
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
  color: var(--ink);
  flex: 1;
  display: flex;
  align-items: center;
}
.hwc-sub {
  font-size: 12px;
  color: var(--mute);
}

/* Speaker card description */
.hwc-desc {
  font-size: 13px;
  color: var(--body);
  line-height: 18px;
  flex: 1;
}

/* Webcam video */
#webcam-video {
  flex: 1;
  min-height: 0;
  width: 100%;
  object-fit: cover;
  border-radius: var(--r-md);
  background: var(--ink);
  display: none;
  transition: opacity .3s;
}

/* Mic bars */
.mic-bars {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: 3px;
  min-height: 36px;
  max-height: 80px;
}
.mic-bar {
  flex: 1;
  background: var(--canvas-soft);
  border-radius: 3px;
  min-height: 4px;
  height: 4px;
  transition: height .07s ease-out, background .07s;
}
.mic-bar.active { background: var(--primary); }

/* Mic peak level display */
.mic-peak {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.4px;
  color: var(--ink);
  line-height: 1;
  flex-shrink: 0;
}

/* Speaker equalizer — animated bars while playing */
.speaker-eq {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  min-height: 36px;
  max-height: 80px;
}
.seq-bar {
  flex: 1;
  background: var(--canvas-soft);
  border-radius: 3px;
  height: 4px;
  transition: background .3s;
}
.seq-bar.playing {
  background: var(--primary);
  animation: eq-dance var(--dur, .6s) ease-in-out infinite alternate;
  animation-delay: calc(var(--n) * 65ms);
}
@keyframes eq-dance {
  from { height: 4px; }
  to   { height: 90%; }
}

/* ═══════════════════════════════════════════
   Badges & Buttons
═══════════════════════════════════════════ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px var(--sp-sm);
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  transition: background .25s, color .25s;
}
.badge-positive { background: var(--primary-pale); color: var(--positive-deep); }
.badge-negative { background: var(--negative-bg);  color: #fff; }
.badge-mute     { background: var(--canvas-soft);  color: var(--mute); }
.badge-warning  { background: #fff8d6; color: #b86700; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  padding: var(--sp-sm) var(--sp-lg);
  border-radius: var(--r-xl);
  font-size: 14px;
  font-weight: 600;
  border: none;
  flex-shrink: 0;
  transition: background .15s, transform .1s, box-shadow .15s;
}
.btn:active { transform: scale(.96); }

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
}
.btn-primary:hover { background: var(--primary-active); box-shadow: 0 4px 12px rgba(159,232,112,.4); }

.btn-secondary {
  background: var(--canvas-soft);
  color: var(--ink);
}
.btn-secondary:hover { background: #dde0db; }

/* Slightly smaller variant for cards */
.btn-sm {
  padding: 6px var(--sp-md);
  font-size: 13px;
  border-radius: var(--r-lg);
}

/* ═══════════════════════════════════════════
   Footer (desktop hidden, visible on mobile)
═══════════════════════════════════════════ */
footer {
  display: none;
  background: var(--ink);
  color: var(--canvas-soft);
  padding: var(--sp-3xl) var(--sp-xl);
  flex-shrink: 0;
}
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--sp-2xl);
}
.footer-logo {
  font-weight: 900;
  font-size: 22px;
  color: var(--primary);
  letter-spacing: -0.5px;
  margin-bottom: var(--sp-xs);
}
.footer-tagline { font-size: 13px; color: var(--mute); }
.footer-links { display: flex; gap: var(--sp-xl); list-style: none; }
.footer-links a { font-size: 14px; color: var(--canvas-soft); opacity: .55; transition: opacity .15s; }
.footer-links a:hover { opacity: 1; }
.footer-copy {
  width: 100%;
  font-size: 12px;
  color: var(--mute);
  padding-top: var(--sp-xl);
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: var(--sp-2xl);
}

/* ═══════════════════════════════════════════
   PC-page specific (numpad + nav cluster)
═══════════════════════════════════════════ */
.keyboard-outer { display: flex; gap: 16px; align-items: flex-start; }

/* Generic PC keyboard is taller than Chromebook; allow vertical scroll */
.page-generic .keyboard-scroll {
  align-items: flex-start;
  overflow-y: auto;
}

/* ═══════════════════════════════════════════
   RTL overrides (Arabic)
═══════════════════════════════════════════ */
/* flex-end becomes visual-left in RTL; flip to keep counter on the visual right */
[dir="rtl"] .keyboard-header { justify-content: flex-start; }

/* progress bar grows left-to-right by default; reverse it for RTL */
[dir="rtl"] .progress-bar { margin-left: auto; margin-right: 0; }
.keyboard-main  { flex-shrink: 0; }
.keyboard-right { display: flex; flex-direction: column; gap: 16px; flex-shrink: 0; }
.keyboard-nav, .keyboard-numpad { display: flex; flex-direction: column; gap: var(--kg, 5px); }
.key-num-0 { width: calc(2 * var(--ku, 44px) + 1 * var(--kg, 5px)); }
.key-num-enter { height: calc(2 * var(--ku, 44px) + 1 * var(--kg, 5px)); }

/* ═══════════════════════════════════════════
   Responsive
═══════════════════════════════════════════ */
@media (max-width: 1199px) {
  .col-hw { width: 260px; }
}

/* Mobile — unlock viewport, stack vertically */
@media (max-width: 767px) {
  body { height: auto; overflow: auto; }
  .page-main {
    display: flex;
    flex-direction: column;
    overflow: visible;
    gap: var(--sp-lg);
    padding: var(--sp-lg);
  }
  .page-chromebook { display: flex; flex-direction: column; row-gap: var(--sp-md); }
  .cb-main { flex-direction: column; }
  .cb-cam-card { width: 100%; height: 220px; }
  .cb-bottom { height: auto; flex-wrap: wrap; }
  .cb-bottom .hw-card { flex: 1 1 calc(50% - 8px); min-height: 130px; }
  .col-hw      { width: 100%; flex-direction: row; flex-wrap: wrap; }
  .hw-card-right { flex: 1 1 calc(50% - 8px); min-height: 140px; }
  .keyboard-panel { min-height: 360px; flex: none; }
  .keyboard-scroll { overflow-x: auto; overflow-y: visible; align-items: flex-start; }
  .keyboard     { --ku: 36px; --kg: 4px; }
  .device-tabs  { display: none; }
  .eyebrow-left p { display: none; }
  footer { display: block; }
}