@import url('https://fonts.googleapis.com/css2?family=Rubik+Mono+One&family=Space+Grotesk:wght@400;500;700&display=swap');

:root {
  --ink: #0b0b12;
  --paper: #fff7e2;
  --sun: #ffd93b;
  --pool: #38c7ff;
  --shock: #ff4f8b;
  --acid: #b6ff4a;
  --night: #11132b;
  --shadow: rgba(8, 10, 26, 0.25);
  --deck-accent: var(--sun);
  --deck-front-start: #11132b;
  --deck-front-mid: #1e1f4a;
  --deck-front-end: #3f1f52;
  --deck-back-start: #fff7e2;
  --deck-back-end: #ffe0b8;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  background: linear-gradient(180deg, #2f6bff 0%, #6f96ff 100%);
  color: var(--ink);
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
  position: relative;
  overflow-x: hidden;
}

body[data-deck="schoolmates"] {
  --deck-accent: #ffd93b;
  --deck-front-start: #fff4b6;
  --deck-front-mid: #ffe788;
  --deck-front-end: #ffd23f;
  --deck-back-start: #fff1c2;
  --deck-back-end: #ffd980;
}

body[data-deck="colleagues"] {
  --deck-accent: #36d6c4;
  --deck-front-start: #c8fff6;
  --deck-front-mid: #82f0dc;
  --deck-front-end: #36d6c4;
  --deck-back-start: #d5fff6;
  --deck-back-end: #7fe9d6;
}

body[data-deck="friends"] {
  --deck-accent: #ff8f6a;
  --deck-front-start: #ffe3d6;
  --deck-front-mid: #ffc8a6;
  --deck-front-end: #ff8f6a;
  --deck-back-start: #ffe9dc;
  --deck-back-end: #ffb68c;
}

body[data-deck="family"] {
  --deck-accent: #7ec8ff;
  --deck-front-start: #d6efff;
  --deck-front-mid: #a6d9ff;
  --deck-front-end: #7ec8ff;
  --deck-back-start: #d8efff;
  --deck-back-end: #9ad5ff;
}

body[data-deck="partner"] {
  --deck-accent: #ff5aa8;
  --deck-front-start: #ffd7f2;
  --deck-front-mid: #ffa1d8;
  --deck-front-end: #ff5aa8;
  --deck-back-start: #ffd9f2;
  --deck-back-end: #ff8fd0;
}

.page {
  position: relative;
  padding: 28px 18px 48px;
  max-width: 640px;
  margin: 0 auto;
  display: grid;
  gap: 24px;
  animation: pageIn 0.7s ease-out;
  z-index: 1;
  min-height: 100svh;
  align-content: start;
}

.hero {
  display: grid;
  gap: 12px;
  text-align: center;
  margin-top: 8px;
}

.eyebrow {
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.2em;
  margin: 0;
  font-size: 0.75rem;
  color: #0b0b12;
}

h1 {
  margin: 0;
  font-family: "Rubik Mono One", "Trebuchet MS", sans-serif;
  font-weight: 400;
  font-size: var(--title-size);
  letter-spacing: 0;
  word-spacing: 0;
  text-transform: uppercase;
  color: #ffffff;
  text-shadow: 4px 4px 0 #0b0b12;
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.3em;
  justify-content: center;
  align-items: center;
}

.hero-title {
  --title-size: clamp(1.8rem, 8vw, 3rem);
  font-size: var(--title-size);
}

.title-word {
  display: inline-block;
}

.subhead {
  margin: 8px auto 0;
  font-size: 1.2rem;
  max-width: 420px;
  color: rgba(255, 255, 255, 0.9);
}

.challenge-line {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.challenge-block {
  display: inline-grid;
  gap: 10px;
  justify-items: center;
  padding: 10px 14px 12px;
  background: rgba(11, 11, 18, 0.12);
  border: 2px solid rgba(11, 11, 18, 0.35);
  border-radius: 18px;
  box-shadow: 0 6px 0 rgba(11, 11, 18, 0.35);
  margin-top: 12px;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
  max-width: 100%;
}

.challenge-badge {
  margin: 0;
  align-self: center;
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.65rem;
  font-weight: 700;
  box-shadow: none;
}

.challenge-chip {
  padding: 6px 14px;
  border-radius: 999px;
  border: 3px solid #0b0b12;
  background: #ffffff;
  color: #0b0b12;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 4px 0 #0b0b12;
}

.challenge-chip.is-target {
  background: var(--deck-accent);
}

.challenge-arrow {
  font-family: "Rubik Mono One", "Trebuchet MS", sans-serif;
  font-size: 0.95rem;
  color: #ffffff;
  text-shadow: 2px 2px 0 #0b0b12;
}

.deck-desc {
  margin: 0 auto;
  max-width: 460px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
  font-style: italic;
}

.deck-desc-bottom {
  text-align: center;
  max-width: 360px;
  font-size: 0.9rem;
}

.deck-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  margin-bottom: 8px;
}

.deck-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: #0b0b12;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.65rem;
  font-weight: 700;
  border: 2px solid #0b0b12;
  box-shadow: 0 4px 0 rgba(11, 11, 18, 0.4);
}

.deck-menu {
  position: relative;
  display: inline-block;
}

.deck-menu-button {
  border: 3px solid #0b0b12;
  background: #ffffff;
  color: var(--ink);
  padding: 6px 38px 6px 12px;
  border-radius: 999px;
  font-family: "Rubik Mono One", "Trebuchet MS", sans-serif;
  font-weight: 400;
  font-size: var(--title-size);
  cursor: pointer;
  box-shadow: 0 6px 0 #0b0b12;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background-image:
    linear-gradient(45deg, transparent 50%, #0b0b12 50%),
    linear-gradient(135deg, #0b0b12 50%, transparent 50%),
    radial-gradient(circle at center, rgba(11, 11, 18, 0.1) 60%, transparent 62%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 12px) 50%,
    calc(100% - 15px) 50%;
  background-size: 5px 5px, 5px 5px, 16px 16px;
  background-repeat: no-repeat;
}

.deck-menu-button[data-deck="schoolmates"] {
  background-color: #ffd23f;
}

.deck-menu-button[data-deck="colleagues"] {
  background-color: #36d6c4;
}

.deck-menu-button[data-deck="friends"] {
  background-color: #ff8f6a;
}

.deck-menu-button[data-deck="family"] {
  background-color: #7ec8ff;
}

.deck-menu-button[data-deck="partner"] {
  background-color: #ff5aa8;
}

.deck-menu-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 #0b0b12;
}

.deck-menu-button:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #0b0b12;
}

.deck-menu-button:focus-visible {
  outline: none;
  box-shadow: 0 6px 0 #0b0b12, 0 0 0 4px rgba(255, 255, 255, 0.35);
}

.deck-menu-list {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 12px;
  list-style: none;
  background: #ffffff;
  border: 3px solid #0b0b12;
  border-radius: 18px;
  box-shadow: 0 10px 0 #0b0b12;
  z-index: 10;
}

.deck-menu-item {
  border: 2px solid #0b0b12;
  background: #ffffff;
  color: var(--ink);
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.8rem;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 5px 0 #0b0b12;
}

.deck-menu-item:hover,
.deck-menu-item:focus-visible {
  transform: translateY(-2px);
}

.deck-menu-item.is-active {
  background: var(--deck-accent);
}

.deck-menu-item[data-deck="schoolmates"] {
  background: #ffd23f;
}

.deck-menu-item[data-deck="colleagues"] {
  background: #36d6c4;
}

.deck-menu-item[data-deck="friends"] {
  background: #ff8f6a;
}

.deck-menu-item[data-deck="family"] {
  background: #7ec8ff;
}

.deck-menu-item[data-deck="partner"] {
  background: #ff5aa8;
}

.deck-menu-item:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #0b0b12;
}

.deck-pill {
  border: 3px solid #0b0b12;
  background: #ffffff;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.85rem;
  cursor: pointer;
  box-shadow: 0 6px 0 #0b0b12;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.deck-pill:hover,
.deck-pill:focus-visible {
  transform: translateY(-2px);
}

.deck-pill.is-active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #0b0b12;
}

.deck-pill:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #0b0b12;
}

.deck-pill[data-deck="schoolmates"] {
  background: #ffd93b;
}

.deck-pill[data-deck="colleagues"] {
  background: #3fe1c4;
}

.deck-pill[data-deck="friends"] {
  background: #ff5db1;
}

.deck-pill[data-deck="family"] {
  background: #8ad1ff;
}

.name-strip {
  display: grid;
  gap: 10px;
  justify-items: center;
  background: #ffffff;
  border-radius: 18px;
  padding: 12px 16px;
  border: 3px solid #0b0b12;
  box-shadow: 0 8px 0 #0b0b12;
}

.share-stack {
  display: grid;
  gap: 0;
  width: 100%;
  margin: 0 auto;
}

.share-stack.is-open .btn {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  border-bottom-left-radius: 18px;
  border-bottom-right-radius: 18px;
  box-shadow: 0 4px 0 #0b0b12;
}

.share-tray {
  margin-bottom: -10px;
  border-radius: 18px 18px 0 0;
  background: rgba(255, 255, 255, 0.96);
  border: 3px solid #0b0b12;
  border-bottom: 0;
  box-shadow: 0 4px 0 #0b0b12;
  padding: 10px 14px 18px;
  width: 100%;
  text-align: center;
}

.share-tray .name-hint {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: rgba(11, 11, 18, 0.55);
}

.share-tray .name-line {
  gap: 10px;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: end;
}

.share-tray .name-field {
  width: 100%;
}

.share-tray .name-label {
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  color: rgba(11, 11, 18, 0.55);
}

.share-tray .name-text {
  font-size: 0.85rem;
  color: rgba(11, 11, 18, 0.6);
  align-self: center;
}

.share-tray .name-field input {
  border-bottom-width: 2px;
  min-width: 0;
  width: 100%;
}

.name-hint {
  margin: 0;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: rgba(10, 10, 10, 0.7);
}

.name-line {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-end;
  gap: 8px;
  font-size: 1rem;
}

.name-field {
  display: grid;
  gap: 4px;
  justify-items: center;
}

.name-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 700;
  color: rgba(11, 11, 18, 0.7);
}

.name-text {
  font-weight: 600;
  letter-spacing: 0.04em;
}

.name-field input {
  border: none;
  border-bottom: 3px solid #0b0b12;
  background: transparent;
  padding: 4px 6px;
  font: inherit;
  text-align: center;
  min-width: 110px;
  color: var(--ink);
}

.name-field input.is-default {
  color: rgba(11, 11, 18, 0.55);
}

.name-field input::placeholder {
  color: rgba(10, 10, 10, 0.4);
}

.name-field input:focus {
  outline: none;
  border-bottom-color: var(--shock);
  box-shadow: 0 8px 0 rgba(11, 11, 18, 0.2);
}

.table {
  display: grid;
  gap: 18px;
  justify-items: center;
}

.deck {
  position: relative;
  width: min(320px, 90vw);
  aspect-ratio: 8 / 11;
  max-height: 70vh;
  perspective: 1000px;
  cursor: pointer;
}

.card {
  position: absolute;
  inset: 0;
  border-radius: 22px;
  background: var(--night);
  border: 4px solid #0b0b12;
  box-shadow: 0 12px 0 #0b0b12, 0 18px 30px var(--shadow);
}

.card.stack {
  background: #15173d;
  transform: translate(6px, 8px) rotate(-1deg);
  opacity: 0.6;
}

.card.stack:nth-child(2) {
  transform: translate(3px, 4px) rotate(1deg);
  opacity: 0.7;
}

.card.stack:nth-child(3) {
  transform: translate(1px, 1px) rotate(-0.5deg);
  opacity: 0.8;
}

.card.current {
  position: absolute;
  inset: 0;
  z-index: 2;
}

.card-inner {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
  --card-flip: 0deg;
  transform: rotateY(var(--card-flip));
}

.card-inner.no-flip {
  transition: none;
}

.card-inner.flipped {
  --card-flip: 180deg;
}

.card.current.is-skipping {
  transform: translate(-38px, 22px) rotate(-6deg) scale(0.98);
  opacity: 0;
  transition: transform 0.32s cubic-bezier(0.2, 0.7, 0.2, 1), opacity 0.32s ease;
}

.card.current.is-done-exit {
  transform: translateY(-32px) scale(0.98);
  opacity: 0;
  transition: transform 0.32s cubic-bezier(0.2, 0.7, 0.2, 1), opacity 0.32s ease;
}

.card.current.is-entering {
  transform: translateY(26px) rotate(2deg) scale(0.96);
  opacity: 0;
  transition: none;
}

.card.current.is-entering.is-entering-active {
  transform: translateY(0) rotate(0deg) scale(1);
  opacity: 1;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.4s ease;
}

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 18px;
  padding: 18px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
  overflow: hidden;
}

.card-header {
  display: grid;
  gap: 6px;
  justify-items: center;
  text-align: center;
}

.card-body {
  display: grid;
  align-content: center;
  gap: 10px;
  text-align: center;
}

.card-back .card-body {
  grid-template-rows: 1fr auto;
  align-content: stretch;
  height: 100%;
}

.card-back .card-content {
  align-self: center;
  display: grid;
  gap: 10px;
}

.card-back .card-complete {
  align-self: end;
}

.card-front {
  color: #0b0b12;
  background: linear-gradient(
    140deg,
    var(--deck-front-start) 0%,
    var(--deck-front-mid) 45%,
    var(--deck-front-end) 100%
  );
  text-align: center;
}

.card-title {
  margin: 0;
  font-family: "Rubik Mono One", "Trebuchet MS", sans-serif;
  font-size: 1.7rem;
  letter-spacing: 0.015em;
  animation: titlePulse 2.4s ease-in-out infinite;
}

.card-deck {
  margin: 0 auto;
  display: block;
  padding: 0;
  border-radius: 0;
  background: transparent;
  border: none;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(11, 11, 18, 0.75);
}

.card-back .card-deck {
  color: rgba(11, 11, 18, 0.7);
}

.card-tagline {
  margin: 0;
  font-size: 0.95rem;
  color: rgba(11, 11, 18, 0.7);
}

.card-back {
  background: linear-gradient(160deg, var(--deck-back-start) 0%, var(--deck-back-end) 100%);
  color: var(--ink);
  transform: rotateY(180deg);
}

.card-name {
  margin: 0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  color: rgba(11, 11, 18, 0.85);
}

.card-challenge {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.45;
}

.card-complete {
  margin: 0;
  display: grid;
  gap: 6px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(11, 11, 18, 0.06);
  border: 2px solid rgba(11, 11, 18, 0.3);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.card-complete.is-accepted {
  background: rgba(255, 255, 255, 0.75);
  border: 2px solid #0b0b12;
  box-shadow: 0 6px 0 rgba(11, 11, 18, 0.25);
  animation: proofIn 0.35s ease-out;
}

.card-proof-title {
  margin: 0;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 700;
  color: rgba(11, 11, 18, 0.7);
}

.card-proof-copy {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: #0b0b12;
}


.actions {
  display: grid;
  gap: 12px;
  width: min(320px, 90vw);
  margin-top: 8px;
}

.challenge-actions {
  grid-template-columns: minmax(0, 1fr);
}

.nav-actions {
  display: grid;
  gap: 10px;
  width: min(320px, 90vw);
  grid-template-columns: minmax(0, 1fr);
}

.btn {
  border: 3px solid #0b0b12;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 800;
  background: var(--deck-accent);
  color: #0b0b12;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 6px 0 #0b0b12;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: 100%;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn.is-disabled,
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn.ghost {
  background: #ffffff;
  color: var(--ink);
  border: 3px solid #0b0b12;
  box-shadow: 0 6px 0 #0b0b12;
}

.btn:active {
  transform: translateY(3px);
  box-shadow: 0 2px 0 #0b0b12;
}

.footer {
  text-align: center;
  font-size: 0.85rem;
  color: #0b0b12;
  display: grid;
  gap: 8px;
  justify-items: center;
}

.footer a {
  color: inherit;
  font-weight: 800;
  text-decoration: none;
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: #ffffff;
  color: inherit;
  border: 2px solid #0b0b12;
  box-shadow: 0 4px 0 #0b0b12;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.footer a:hover,
.footer a:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #0b0b12;
}

.confetti {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 999;
}

.confetti-piece {
  position: absolute;
  width: var(--size, 10px);
  height: var(--size, 10px);
  background: var(--color, #ffd93b);
  opacity: 0;
  border-radius: 3px;
  border: 2px solid #0b0b12;
  box-shadow: 3px 4px 0 rgba(11, 11, 18, 0.4);
  transform: translate3d(0, 0, 0) rotate(0deg) scale(0.6);
  transform-origin: center;
  will-change: transform, opacity;
  animation: confetti-firework 1.15s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
}

.confetti-piece.shape-strip {
  width: calc(var(--size, 10px) * 1.4);
  height: calc(var(--size, 10px) * 0.6);
  border-radius: 999px;
}

.confetti-piece.shape-diamond {
  transform: translate3d(0, 0, 0) rotate(45deg) scale(0.6);
}

.confetti-piece.shape-triangle {
  border-radius: 0;
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

@keyframes confetti-firework {
  0% {
    opacity: 0;
    transform: translate3d(0, 0, 0) rotate(0deg) scale(0.6);
  }
  12% {
    opacity: 1;
  }
  45% {
    opacity: 1;
    transform: translate3d(var(--x, 0px), var(--y, -220px), 0) rotate(var(--r, 0deg)) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--x2, 0px), var(--y2, 0px), 0) rotate(calc(var(--r, 0deg) * 1.2)) scale(0.85);
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes pageIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes titlePulse {
  0%,
  100% {
    opacity: 0.85;
    transform: translateY(0) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateY(-2px) scale(1.03);
  }
}

@keyframes proofIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 720px) {
  .page {
    padding: 48px 24px 64px;
    gap: 28px;
  }

  .challenge-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .deck-desc {
    margin: 0 auto;
    text-align: center;
  }
}

@media (max-height: 780px) {
  .page {
    padding: 18px 16px 28px;
    gap: 16px;
  }

  h1 {
    font-size: clamp(1.8rem, 8.5vw, 2.8rem);
    text-shadow: 3px 3px 0 #0b0b12;
  }

  .subhead {
    font-size: 0.98rem;
  }

  .deck {
    max-height: 60vh;
  }

  .actions,
  .nav-actions {
    gap: 10px;
    margin-top: 4px;
  }

  .btn {
    padding: 10px 16px;
  }

  .footer {
    gap: 6px;
    font-size: 0.78rem;
  }
}

@media (max-height: 680px) {
  .page {
    padding: 14px 14px 20px;
    gap: 12px;
  }

  .deck {
    max-height: 54vh;
  }

  .card-face {
    padding: 14px;
  }

  .card-title {
    font-size: 1.4rem;
  }

  .card-challenge {
    font-size: 1rem;
  }

  .card-complete {
    padding: 8px 10px;
  }
}