/* =========================================================
   Idle Panda: Bamboo Merge — Bamboo Grove Walk layout
   Differentiated: side bamboo rails, polaroid hero stack,
   merge-board feature slots, diagonal gallery river, wavy CTAs
   ========================================================= */

:root {
  --green-deep: #2d6a1e;
  --green: #6fbf3a;
  --green-soft: #a8e063;
  --lime: #8bc34a;
  --mint: #e8f7d8;
  --sky: #4eb8f5;
  --sky-deep: #2a9fd8;
  --orange: #ff9f1a;
  --orange-deep: #e87800;
  --pink: #ff6b9d;
  --cream: #fff8ec;
  --ink: #1a2e14;
  --ink-soft: #3d5340;
  --white: #ffffff;
  --shadow: 0 12px 32px rgba(45, 106, 30, 0.18);
  --radius-blob: 28px;
  --font-display: "Fredoka", system-ui, sans-serif;
  --font-body: "Nunito", system-ui, sans-serif;
  --nav-h: 72px;
  --ease: cubic-bezier(0.34, 1.3, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(168, 224, 99, 0.45), transparent 60%),
    linear-gradient(180deg, #d4f0a8 0%, var(--mint) 18%, var(--cream) 55%, #dff5c8 100%);
  min-height: 100dvh;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
}

/* ----- Bamboo side rails (desktop framing) ----- */
.bamboo-rail {
  display: none;
  position: fixed;
  top: 0;
  bottom: 0;
  width: 48px;
  z-index: 40;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      180deg,
      #5aad2e 0 42px,
      #4a9624 42px 46px,
      #6fc43a 46px 88px,
      #4a9624 88px 92px
    );
  box-shadow: inset -4px 0 8px rgba(0, 0, 0, 0.12);
  opacity: 0.55;
}

.bamboo-rail--left { left: 0; border-radius: 0 12px 12px 0; }
.bamboo-rail--right { right: 0; border-radius: 12px 0 0 12px; box-shadow: inset 4px 0 8px rgba(0, 0, 0, 0.12); }

@media (min-width: 1200px) {
  .bamboo-rail { display: block; }
  body { padding-inline: 40px; }
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 18px;
  transition: transform 0.2s var(--ease), box-shadow 0.2s ease, filter 0.2s ease;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.btn:focus-visible {
  outline: 3px solid var(--sky);
  outline-offset: 3px;
}

.btn--nav {
  background: linear-gradient(180deg, var(--green-soft), var(--green));
  color: var(--white);
  box-shadow: 0 4px 0 var(--green-deep), 0 8px 16px rgba(45, 106, 30, 0.25);
}

.btn--store {
  color: var(--white);
  min-width: 150px;
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.2), var(--shadow);
}

.btn--apple {
  background: linear-gradient(180deg, #3d3d3d, #1a1a1a);
}

.btn--google {
  background: linear-gradient(180deg, var(--sky), var(--sky-deep));
  box-shadow: 0 5px 0 #1a7aad, var(--shadow);
}

.btn--primary {
  background: linear-gradient(180deg, var(--orange), var(--orange-deep));
  color: var(--white);
  box-shadow: 0 4px 0 #c46500;
  padding: 0.85rem 1.8rem;
}

.btn--lg {
  padding: 1rem 1.75rem;
  font-size: 1.1rem;
  border-radius: 22px;
}

.btn__icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

/* ----- Navbar ----- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.nav.is-scrolled {
  background: rgba(255, 248, 236, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(45, 106, 30, 0.12);
}

.nav__inner {
  max-width: 1120px;
  margin: 0 auto;
  height: 100%;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  z-index: 2;
}

.nav__icon {
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(45, 106, 30, 0.25);
}

.nav__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.nav__name-idle { color: var(--sky-deep); }
.nav__name-panda { color: var(--orange-deep); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.25rem;
}

.nav__links a:not(.btn) {
  font-weight: 700;
  color: var(--ink-soft);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav__links a:not(.btn):hover {
  color: var(--green-deep);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 2;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--green-deep);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav__toggle.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 860px) {
  .nav__toggle { display: flex; }

  .nav__links {
    position: fixed;
    inset: 0;
    background: linear-gradient(165deg, #dff5c8, var(--cream));
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
  }

  .nav__links.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav__links a:not(.btn) {
    font-size: 1.35rem;
    font-family: var(--font-display);
  }
}

/* ----- Hero ----- */
.hero {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
  min-height: calc(100dvh - var(--nav-h));
}

.hero__glow {
  position: absolute;
  inset: -10% 10% auto;
  height: 55%;
  background: radial-gradient(ellipse at center, rgba(255, 250, 200, 0.85) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero__leaves {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 8% 70%, rgba(111, 191, 58, 0.35) 0 8%, transparent 9%),
    radial-gradient(circle at 92% 40%, rgba(78, 184, 245, 0.25) 0 6%, transparent 7%),
    radial-gradient(circle at 85% 85%, rgba(255, 159, 26, 0.2) 0 5%, transparent 6%);
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.hero__eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--green-deep);
  background: rgba(255, 255, 255, 0.7);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  border: 2px solid rgba(111, 191, 58, 0.45);
  margin-bottom: 0.75rem;
}

.hero__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  margin-bottom: 1rem;
}

.logo-idle,
.logo-panda {
  font-size: clamp(2.8rem, 9vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  text-shadow:
    0 3px 0 rgba(255, 255, 255, 0.95),
    0 6px 0 rgba(45, 106, 30, 0.15),
    0 10px 24px rgba(45, 106, 30, 0.2);
  -webkit-text-stroke: 4px var(--white);
  paint-order: stroke fill;
}

.logo-idle { color: var(--sky); }
.logo-panda { color: var(--orange); margin-top: -0.35em; }

.logo-sub {
  margin-top: 0.35rem;
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  font-weight: 600;
  color: var(--white);
  background: linear-gradient(180deg, var(--green-soft), var(--green-deep));
  padding: 0.4rem 1.4rem;
  border-radius: 999px;
  box-shadow: 0 4px 0 var(--green-deep);
  -webkit-text-stroke: 0;
  text-shadow: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero__tagline {
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 42ch;
  margin: 0 auto 1.5rem;
  font-weight: 600;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Polaroid stack */
.hero__stage {
  position: relative;
  z-index: 2;
  height: min(52vh, 420px);
  max-width: 520px;
  margin: 0 auto;
  width: 100%;
}

.polaroid {
  position: absolute;
  margin: 0;
  background: var(--white);
  padding: 10px 10px 36px;
  border-radius: 14px;
  box-shadow: var(--shadow), 0 0 0 3px rgba(255, 255, 255, 0.8);
  overflow: hidden;
}

.polaroid img {
  width: 100%;
  height: auto;
  aspect-ratio: 576 / 1024;
  object-fit: cover;
  border-radius: 8px;
  background: var(--mint);
}

.polaroid--a {
  width: 48%;
  left: 2%;
  top: 6%;
  transform: rotate(-8deg);
  z-index: 2;
  animation: float-a 5s ease-in-out infinite;
}

.polaroid--b {
  width: 48%;
  right: 2%;
  top: 10%;
  transform: rotate(7deg);
  z-index: 3;
  animation: float-b 5.5s ease-in-out infinite;
}

.hero__burst {
  position: absolute;
  top: -4%;
  right: 8%;
  z-index: 4;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 4vw, 2rem);
  color: var(--pink);
  -webkit-text-stroke: 3px var(--white);
  paint-order: stroke fill;
  text-shadow: 0 4px 0 rgba(120, 30, 60, 0.25);
  transform: rotate(12deg);
  animation: pop-burst 2.8s var(--ease) infinite;
}

@keyframes float-a {
  0%, 100% { transform: rotate(-8deg) translateY(0); }
  50% { transform: rotate(-6deg) translateY(-10px); }
}
@keyframes float-b {
  0%, 100% { transform: rotate(7deg) translateY(0); }
  50% { transform: rotate(9deg) translateY(-14px); }
}
@keyframes float-c {
  0%, 100% { transform: rotate(-2deg) translateY(0); }
  50% { transform: rotate(0deg) translateY(-8px); }
}
@keyframes pop-burst {
  0%, 100% { transform: rotate(12deg) scale(1); }
  50% { transform: rotate(8deg) scale(1.08); }
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1fr 1.05fr;
    padding: 2rem 2rem 4rem;
    text-align: left;
  }

  .hero__content {
    text-align: left;
    margin: 0;
  }

  .hero__logo { align-items: flex-start; }
  .hero__tagline { margin-left: 0; }
  .hero__ctas { justify-content: flex-start; }
  .hero__stage {
    height: min(70vh, 520px);
    max-width: none;
  }
}

/* ----- Wave ----- */
.wave {
  color: #f3fce6;
  line-height: 0;
  margin-top: -1px;
}

.wave svg {
  width: 100%;
  height: 48px;
  display: block;
}

.wave--mint { color: #f3fce6; }

/* ----- Features / merge board ----- */
.features {
  background: #f3fce6;
  padding: 1rem 1.25rem 4rem;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.section-head h2 {
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  color: var(--green-deep);
}

.section-head p {
  color: var(--ink-soft);
  font-weight: 600;
  margin: 0;
}

.merge-board {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  padding: 1.75rem;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(168, 224, 99, 0.5), transparent 50%),
    linear-gradient(160deg, #9fd84a 0%, #6fbf3a 45%, #4e9a28 100%);
  border-radius: 36px;
  border: 6px solid var(--white);
  box-shadow: var(--shadow), inset 0 2px 0 rgba(255, 255, 255, 0.35);
  position: relative;
}

/* Oval “merge slots” — game-board metaphor */
.slot {
  background: rgba(255, 255, 255, 0.92);
  border-radius: 50% / 28%;
  padding: 1.75rem 1.5rem 1.5rem;
  text-align: center;
  box-shadow: 0 8px 0 rgba(45, 106, 30, 0.15), inset 0 -6px 16px rgba(111, 191, 58, 0.12);
  transition: transform 0.25s var(--ease), box-shadow 0.25s ease;
  cursor: default;
}

.slot:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 0 rgba(45, 106, 30, 0.18), 0 16px 28px rgba(45, 106, 30, 0.2);
}

.slot__icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 0.85rem;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, var(--pink), #ff8f6b);
  color: var(--white);
  border-radius: 50%;
  box-shadow: 0 4px 0 rgba(180, 40, 80, 0.35);
}

.slot__icon svg {
  width: 26px;
  height: 26px;
}

.slot h3 {
  font-size: 1.2rem;
  color: var(--green-deep);
  margin-bottom: 0.4rem;
}

.slot p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0;
  font-weight: 600;
}

@media (min-width: 700px) {
  .merge-board {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 1.75rem;
    padding: 2.25rem;
  }
}

/* ----- Gallery river ----- */
.gallery {
  padding: 4rem 0 3rem;
  background:
    linear-gradient(180deg, #f3fce6 0%, var(--cream) 40%, #ffe8c8 100%);
  overflow: hidden;
}

.gallery__head {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 2rem;
  padding: 0 1.25rem;
}

.gallery__head h2 {
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  color: var(--orange-deep);
}

.gallery__head p {
  color: var(--ink-soft);
  font-weight: 600;
  margin: 0;
}

.gallery__river {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem 1.25rem 2.5rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--green) transparent;
}

.river-card {
  flex: 0 0 min(72vw, 260px);
  scroll-snap-align: center;
  margin: 0;
  background: var(--white);
  padding: 12px 12px 48px;
  border-radius: 18px;
  box-shadow: var(--shadow);
  position: relative;
}

.river-card img {
  width: 100%;
  aspect-ratio: 576 / 1024;
  object-fit: cover;
  border-radius: 10px;
  background: var(--mint);
}

.river-card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--green-deep);
}

.river-card--tilt-l { transform: rotate(-3.5deg); }
.river-card--tilt-r { transform: rotate(3.5deg); }

.river-card:hover {
  transform: rotate(0deg) translateY(-8px);
  transition: transform 0.3s var(--ease);
  z-index: 2;
}

@media (min-width: 900px) {
  .gallery__river {
    justify-content: center;
    flex-wrap: wrap;
    overflow: visible;
    max-width: 1100px;
    margin: 0 auto;
    gap: 1.5rem 1.25rem;
  }

  .river-card {
    flex: 0 0 180px;
  }

  .river-card:nth-child(even) {
    margin-top: 2.5rem;
  }
}

/* ----- FAQ ----- */
.faq {
  padding: 3rem 1.25rem 4rem;
  background: linear-gradient(180deg, #ffe8c8, #ffd4a8);
}

.faq__inner {
  max-width: 720px;
  margin: 0 auto;
}

.faq__inner > h2 {
  text-align: center;
  font-size: clamp(1.75rem, 3.5vw, 2.3rem);
  color: var(--orange-deep);
  margin-bottom: 1.5rem;
}

.faq__item {
  background: rgba(255, 255, 255, 0.88);
  border-radius: 20px;
  margin-bottom: 0.75rem;
  border: 3px solid rgba(255, 159, 26, 0.35);
  overflow: hidden;
}

.faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq__item summary::-webkit-details-marker { display: none; }

.faq__item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--orange);
  font-weight: 700;
  transition: transform 0.2s ease;
}

.faq__item[open] summary::after {
  content: "–";
}

.faq__item p {
  padding: 0 1.25rem 1.15rem;
  margin: 0;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.98rem;
}

/* ----- Download ----- */
.download {
  position: relative;
  padding: 5rem 1.25rem 4.5rem;
  background: linear-gradient(180deg, #ff9f1a 0%, #ff7a5c 40%, #4eb8f5 100%);
  overflow: hidden;
  clip-path: ellipse(120% 100% at 50% 100%);
  margin-top: -1rem;
}

.download__bloom {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 80%, rgba(255, 255, 255, 0.25) 0 4%, transparent 5%),
    radial-gradient(circle at 80% 30%, rgba(255, 255, 255, 0.2) 0 5%, transparent 6%),
    radial-gradient(circle at 60% 70%, rgba(255, 255, 255, 0.15) 0 3%, transparent 4%);
  pointer-events: none;
}

.download__inner {
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  color: var(--white);
}

.download__mascot {
  margin: 0 auto 1rem;
  border-radius: 22px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  animation: float-c 4s ease-in-out infinite;
}

.download__inner h2 {
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  text-shadow: 0 3px 0 rgba(100, 20, 60, 0.25);
  -webkit-text-stroke: 2px rgba(255, 255, 255, 0.35);
  paint-order: stroke fill;
}

.download__inner > p {
  font-weight: 700;
  opacity: 0.95;
  margin-bottom: 1.5rem;
}

.download__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.download__note {
  font-size: 0.9rem;
  opacity: 0.85;
  margin: 0;
  font-weight: 600;
}

/* ----- Footer ----- */
.footer {
  background: var(--green-deep);
  color: rgba(255, 255, 255, 0.9);
  padding: 2.5rem 1.25rem 2rem;
}

.footer__inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.footer__brand img {
  border-radius: 10px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.footer__links a {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.footer__links a:hover {
  color: var(--green-soft);
}

.footer__copy {
  margin: 0;
  font-size: 0.88rem;
  opacity: 0.75;
}

/* ----- Modal ----- */
.modal[hidden] { display: none; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 46, 20, 0.55);
  backdrop-filter: blur(4px);
  cursor: pointer;
}

.modal__panel {
  position: relative;
  z-index: 1;
  background: var(--cream);
  border-radius: 28px;
  padding: 2rem 1.75rem 1.75rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
  border: 5px solid var(--white);
  box-shadow: var(--shadow);
  animation: modal-in 0.35s var(--ease);
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.9) translateY(12px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(45, 106, 30, 0.1);
  color: var(--ink);
  transition: background 0.2s ease;
}

.modal__close:hover {
  background: rgba(45, 106, 30, 0.2);
}

.modal__close svg {
  width: 20px;
  height: 20px;
}

.modal__icon {
  margin-bottom: 0.75rem;
}

.modal__icon img {
  margin: 0 auto;
  border-radius: 16px;
}

.modal__panel h3 {
  font-size: 1.6rem;
  color: var(--green-deep);
}

.modal__panel p {
  color: var(--ink-soft);
  font-weight: 600;
  margin-bottom: 1.25rem;
}

/* ----- Reduced motion ----- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .polaroid--a,
  .polaroid--b,
  .hero__burst,
  .download__mascot {
    animation: none !important;
  }

  .btn:hover,
  .slot:hover,
  .river-card:hover {
    transform: none;
  }
}