/* wisp.baby: light and dark via custom properties. */

:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --fg: #16181d;
  --muted: #6b7079;
  --faint: #a4a8b0;
  --line: #e3e5e8;
  --track: #eef0f2;
  --accent-gcore: #0e8a7e;
  --accent-netflix: #5a5fd8;
  --accent: var(--accent-gcore);
  --thumb-fg: #ffffff;
  --focus: #2f6fe4;
  --error: #b4532a;
  --shadow: 0 1px 2px rgba(20, 24, 32, .08), 0 4px 14px rgba(20, 24, 32, .08);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111317;
    --surface: #1a1d23;
    --fg: #eceef1;
    --muted: #9aa0aa;
    --faint: #5d636d;
    --line: #2a2e36;
    --track: #20242b;
    --accent-gcore: #35c2b2;
    --accent-netflix: #8f93ff;
    --thumb-fg: #0c0e12;
    --focus: #7aa7ff;
    --error: #f0956b;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #111317;
  --surface: #1a1d23;
  --fg: #eceef1;
  --muted: #9aa0aa;
  --faint: #5d636d;
  --line: #2a2e36;
  --track: #20242b;
  --accent-gcore: #35c2b2;
  --accent-netflix: #8f93ff;
  --thumb-fg: #0c0e12;
  --focus: #7aa7ff;
  --error: #f0956b;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .35);
  color-scheme: dark;
}

body[data-mode="netflix"] { --accent: var(--accent-netflix); }

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.45;
  overflow-x: hidden;
}

[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  padding: 8px 12px;
  background: var(--surface);
  color: var(--fg);
  border-radius: 8px;
  box-shadow: var(--shadow);
  z-index: 10;
}
.skip:focus { top: 12px; }

/* Header */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
}

.source {
  display: inline-flex;
  padding: 4px;
  margin: -4px;
  border-radius: 6px;
  color: var(--muted);
  transition: color .15s;
}
.source:hover { color: var(--fg); }

.wordmark {
  display: inline-flex;
  align-items: center;
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -.01em;
}
.wordmark-tld { color: var(--muted); font-weight: 400; }

/* Main */

.main {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 7vh 16px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.result { text-align: center; }

.speed-label {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 18px;
}

.speed-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  /* keep the number visually centred: the side slot is balanced by padding */
  padding-left: 66px;
}

.speed {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--faint);
  transition: color .35s ease;
}
body[data-state="done"] .speed { color: var(--fg); }

.speed-value {
  font-size: clamp(88px, 26vw, 160px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
  min-width: 1ch;
}
.speed-units {
  font-size: clamp(20px, 5vw, 28px);
  font-weight: 300;
  color: var(--muted);
}

.speed-side {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  flex: none;
}

.spinner {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--track);
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}
body[data-state="done"] .spinner,
body[data-state="error"] .spinner,
body[data-state="stopped"] .spinner { display: none; }

.restart {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  background: var(--surface);
  color: var(--fg);
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  animation: pop .35s cubic-bezier(.2, 1.4, .4, 1);
  transition: transform .2s ease, border-color .2s ease;
}
.restart:hover { border-color: var(--accent); transform: rotate(-30deg); }
.restart:focus-visible { border-radius: 50%; }

.error { margin: 18px auto 0; max-width: 420px; }
.error-msg { margin: 0 0 14px; font-size: 20px; color: var(--error); }
body[data-state="error"] .speed-row { display: none; }

/* Buttons */

.btn {
  font: inherit;
  font-size: 15px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
}
.btn:hover { border-color: var(--muted); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--thumb-fg);
}
.btn-primary:hover { filter: brightness(1.08); border-color: var(--accent); }

.linkish {
  font: inherit;
  font-size: 15px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 16px;
  color: var(--fg);
  cursor: pointer;
}
.linkish:hover { border-color: var(--muted); }

/* Mode switch */

.modes {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.switch {
  --pad: 4px;
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: min(100%, 360px);
  padding: var(--pad);
  border-radius: 999px;
  background: var(--track);
  border: 1px solid var(--line);
  isolation: isolate;
}

.switch-thumb {
  position: absolute;
  z-index: -1;
  top: var(--pad);
  bottom: var(--pad);
  left: var(--pad);
  width: calc(50% - var(--pad));
  border-radius: 999px;
  background:
    linear-gradient(135deg, color-mix(in srgb, #fff 18%, transparent), transparent 60%),
    var(--accent);
  box-shadow: 0 2px 10px color-mix(in srgb, var(--accent) 40%, transparent);
  transition:
    transform .5s cubic-bezier(.65, -0.1, .25, 1.25),
    background-color .4s ease,
    box-shadow .4s ease;
}
body[data-mode="netflix"] .switch-thumb { transform: translateX(100%); }
/* A brief stretch while the thumb travels (scale composes with the transform). */
.switch.moving .switch-thumb { animation: squish .5s ease; }

.switch-opt {
  font: inherit;
  appearance: none;
  border: 0;
  background: none;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.15;
  transition: color .3s ease;
}
.switch-opt[aria-checked="true"] { color: var(--thumb-fg); }
.switch-opt[aria-checked="false"]:hover { color: var(--fg); }
.switch-name { font-size: 15px; font-weight: 600; }
.switch-sub { font-size: 12px; opacity: .85; }

/* Route diagram */

.route {
  margin: 18px 0 0;
  width: min(100%, 520px);
}

.route-path {
  --dot: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.node {
  flex: none;
  min-width: 56px;
  padding: 0 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}
.node-dot {
  width: var(--dot);
  height: var(--dot);
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
  transition: border-color .4s ease, background-color .4s ease;
}
.node-you .node-dot,
.node-oca .node-dot { background: var(--accent); }
body[data-mode="gcore"] .node-box .node-dot { background: var(--accent); }

.node-label {
  font-size: 12px;
  line-height: 1.25;
  color: var(--muted);
  white-space: nowrap;
}
.node-box .node-label { color: var(--fg); }
.node-oca .node-label { white-space: normal; width: 76px; }

.link {
  flex: 1 1 0;
  min-width: 14px;
  max-width: 120px;
  height: var(--dot);
  display: flex;
  align-items: center;
  margin: 0 -14px; /* tuck the line under the labels' padding */
}
.link-line {
  display: block;
  width: 100%;
  height: 4px;
  --step: 10px;
  background-image: radial-gradient(circle at center, var(--accent) 0 1.6px, transparent 2.1px);
  background-size: var(--step) 4px;
  background-repeat: repeat-x;
  opacity: .45;
  /* Idle: a slow drift. */
  animation: flow-in 2.8s linear infinite;
  transition: opacity .4s ease;
}

/* Download: bytes flow toward You (leftwards); upload: away from you. */
body[data-phase="servers"] .link-line,
body[data-phase="download"] .link-line,
body[data-phase="latency"] .link-line {
  opacity: 1;
  animation-duration: .55s;
}
body[data-phase="latency"] .link-line { animation-name: pulse; animation-duration: 1s; }
body[data-phase="upload"] .link-line {
  opacity: 1;
  animation-name: flow-out;
  animation-duration: .55s;
}

/* The Netflix hop folds away in G-Core mode. */
.link-oca, .node-oca {
  overflow: hidden;
  transition: max-width .55s cubic-bezier(.4, 0, .2, 1), max-height .55s cubic-bezier(.4, 0, .2, 1), opacity .35s ease, margin .55s cubic-bezier(.4, 0, .2, 1);
}
.node-oca { max-width: 90px; max-height: 80px; }
body[data-mode="gcore"] .link-oca,
body[data-mode="gcore"] .node-oca {
  max-height: var(--dot);
  max-width: 0;
  min-width: 0;
  opacity: 0;
  margin: 0;
}

.route-caption {
  margin-top: 10px;
  text-align: center;
  font-size: 12px;
  color: var(--faint);
}

/* More info */

.more-toggle { margin-top: 30px; }

.more {
  width: 100%;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  animation: fade-in .3s ease;
}

.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  text-align: center;
}
.metric-title {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}
.metric-pair { display: flex; justify-content: center; gap: 26px; }
.metric-cell { display: flex; flex-direction: column; align-items: center; }
.metric-num {
  font-size: 40px;
  font-weight: 200;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--fg);
  transition: color .35s ease;
}
.metric-cell[data-measuring="true"] .metric-num { color: var(--faint); }
.metric-unit { font-size: 16px; font-weight: 300; margin-left: 4px; color: var(--muted); }
.metric-sub { font-size: 13px; color: var(--muted); min-height: 1.45em; }

.facts {
  margin: 26px 0 0;
  display: grid;
  gap: 6px;
  font-size: 14px;
}
.fact {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 12px;
}
.fact dt { color: var(--muted); text-align: right; }
.fact dd { margin: 0; overflow-wrap: anywhere; }
.fact code, .foot code { font-family: var(--mono); font-size: .92em; }

.more-actions { margin-top: 20px; text-align: center; }

/* Settings */

.settings {
  margin: 18px auto 0;
  max-width: 460px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  display: grid;
  gap: 14px;
}
.settings fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
}
.settings legend {
  padding: 0;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}
.settings label { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; }
.settings input[type="number"] {
  font: inherit;
  width: 72px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
}
.settings input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }
.settings-err { margin: 0; color: var(--error); font-size: 14px; }
.settings-actions { display: flex; gap: 10px; }

/* Footer */

.foot {
  padding: 18px 16px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}
.foot p { margin: 2px 0; }
.foot-note { color: var(--faint); font-size: 12px; overflow-wrap: anywhere; }

/* Small screens */

@media (max-width: 560px) {
  .top { padding: 16px 16px 0; }
  .main { padding-top: 5vh; }
  .speed-row { gap: 8px; padding-left: 52px; }
  .speed-side, .restart { width: 44px; height: 44px; }
  .speed { gap: 6px; }
  .metrics { grid-template-columns: 1fr; gap: 22px; }
  .fact { grid-template-columns: 1fr; gap: 0; }
  .fact dt { text-align: left; font-size: 12px; }
  .node { min-width: 44px; padding: 0 2px; }
  .node-oca .node-label { width: 70px; }
}

/* Motion */

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pop { from { transform: scale(.6); opacity: 0; } }
@keyframes fade-in { from { opacity: 0; transform: translateY(-4px); } }
@keyframes flow-in { from { background-position-x: 0; } to { background-position-x: calc(-1 * var(--step)); } }
@keyframes flow-out { from { background-position-x: 0; } to { background-position-x: var(--step); } }
@keyframes pulse { 50% { opacity: .35; } }
@keyframes squish { 45% { scale: 1.14 .92; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
  }
  .link-line { opacity: .8; }
  /* The spinner can't spin: show a still ring that breathes via opacity only on state. */
  .spinner { border-color: var(--accent); border-top-color: var(--track); }
}