/* ============================================================
   LIVESPACE — Deep teal product case study
   ============================================================
   Palette: deep teal cards · white type
   ============================================================ */

:root {
  --ls-card:        #08605F;
  --ls-text:        rgba(255, 255, 255);
  --ls-text-mid:    rgba(255, 255, 255);
  --ls-label:       rgba(255, 255, 255);
  --ls-sep:         rgba(255, 255, 255);
}

/* ---- Page base ---- */
body {
  background: var(--outer);
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;

  background-image: url(../assets/World/texture.png);
  background-repeat: repeat;
  opacity: 0.05;
}

/* ============================================================
   OUTER NAVIGATION
   ============================================================ */

.outer-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0.75rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 200;
}

.close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--close-button);
  color: var(--close-button-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  text-decoration: none;
  flex-shrink: 0;
  transition: background 0.2s, color 0.2s;
}

.close:hover {
  background: var(--close-hover-button-bg);
  color: var(--close-hover-button-text);
}

/* ============================================================
   MAIN WRAPPER
   ============================================================ */

.ls-main {
  padding: 0 1.25rem 3rem;
  display: flex;
  flex-direction: column;
}

.ls-hero-card,
.ls-content-card {
  background: var(--ls-card);
}

.ls-hero-card    { border-radius: 20px 20px 0 0; overflow: hidden; }
.ls-content-card { border-radius: 0 0 20px 20px; overflow: hidden; }

/* ============================================================
   HERO CARD — LEFT: text  |  RIGHT: phone art
   ============================================================ */

.ls-hero-card {
  display: grid;
  grid-template-columns: 44% 56%;
  min-height: calc(100vh - 64px);
}

/* Left: brand + meta text */
.ls-card-left {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: clamp(2.5rem, 20vh, 8rem);
  padding: 2rem 2rem 3rem 10rem;
}

.ls-card-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ls-text);
  flex-shrink: 0;
}

.ls-brand-mark {
  font-size: 0.7rem;
  opacity: 0.55;
}

.ls-card-meta {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  
}

.ls-card-title {
  font-size: clamp(1.2rem, 2vw, 1.75rem);
  font-weight: 400;
  line-height: 1.40;
  color: var(--ls-text);
  letter-spacing: -0.01em;
  margin: 0;
}

.ls-card-tags {
  font-size: var(--font-size-base);
  color: var(--ls-text-mid);
  line-height: 1.6;
  margin: 0;
}

.ls-card-timeline {
  font-size: 0.875rem;
  color: var(--ls-label);
  margin: 0;
}

.ls-prototype-link {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--ls-text-mid);
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255, 255, 255, 0.22);
  transition: color 0.2s, text-decoration-color 0.2s;
}

.ls-prototype-link:hover {
  color: var(--ls-text);
  text-decoration-color: rgba(255, 255, 255, 0.55);
}

/* Right: phone art (fills column, bleeds bottom) */
.ls-card-right {
  overflow: hidden;
  position: relative;
}

.ls-card-art {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ls-card-art img {
  width: 108%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
  display: block;
}

/* ============================================================
   NAVIGATION STACK
   ============================================================ */

.ls-stack {
  position: relative;
  height: calc(100vh - 64px);
}

.ls-stack .ls-hero-card {
  position: absolute;
  top: 80px;
  left: 0; right: 0; bottom: 0;
  min-height: unset;
  z-index: 4;
  will-change: transform;
  transition: transform 200ms ease-out;
}

.ls-peek-card {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  border-radius: 20px 20px 0 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 4px;
  text-decoration: none;
  cursor: pointer;
  will-change: transform;
  transition: transform 200ms ease-out;
}

/* Positions by DOM order */
.ls-peek-card:nth-child(1) { top: 0;    z-index: 1; }
.ls-peek-card:nth-child(2) { top: 20px; z-index: 2; }
.ls-peek-card:nth-child(3) { top: 40px; z-index: 3; }
.ls-peek-card:nth-child(4) { top: 60px; z-index: 4; }

/* Colors by project */
.ls-peek-card--jeon      { background: var(--background-js-card); }
.ls-peek-card--forgotten { background: var(--background-fp-card); }
.ls-peek-card--seoul     { background: var(--background-sf-card); }
.ls-peek-card--tesla     { background: var(--background-tc-card); }

/* Hover */
.ls-peek-card:hover ~ .ls-peek-card,
.ls-peek-card:hover ~ .ls-hero-card {
  transform: translateY(7px);
}

.ls-peek-card__label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 150ms ease-out;
}

.ls-peek-card--jeon      .ls-peek-card__label { color: var(--font-color-js); }
.ls-peek-card--forgotten .ls-peek-card__label { color: var(--font-color-fp); }
.ls-peek-card--seoul     .ls-peek-card__label { color: var(--font-color-sf); }
.ls-peek-card--tesla     .ls-peek-card__label { color: var(--font-color-tc); }

.ls-peek-card:hover .ls-peek-card__label { opacity: 1; }

/* ============================================================
   CONTENT CARD — sections
   ============================================================ */

.ls-content-card {
  padding: 0;
}

.ls-card-section {
  padding: 5rem 10rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  min-height: calc(100vh - 64px);
  justify-content: center;
}

.ls-card-section--sm {
  min-height: auto;
  padding: 3.5rem 10rem;
}

.ls-divider {
  border: none;
  border-top: 1px solid var(--ls-sep);
  margin: 0;
}

.ls-section-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ls-label);
}

.ls-content-card p {
  font-size: var(--font-size-base);
  line-height: 1.65;
  color: var(--ls-text-mid);
  margin: 0;
}

.ls-content-card strong {
  color: var(--ls-text);
  font-weight: 600;
}

/* ---- Description ---- */
.ls-desc-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 56ch;
}

.ls-desc-inner p {
  font-size: clamp(1.5rem, 2.2vw, 1.875rem);
  font-weight: 300;
  line-height: 1.48;
  color: var(--ls-text);
}

/* ---- Acknowledgements ---- */
.ls-ack-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.ls-ack-list {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 0.5rem 2rem;
  margin: 0;
}

.ls-ack-list dt {
  font-size: var(--font-size-base);
  color: var(--ls-label);
  font-weight: 400;
}

.ls-ack-list dd {
  font-size: var(--font-size-base);
  color: var(--ls-text);
  font-weight: 400;
  margin: 0;
}

/* ---- What I worked on ---- */
.ls-worked-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 3.5rem;
  padding-bottom: 3.5rem;
}

.ls-worked-items {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.ls-worked-items p {
  color: var(--ls-text-mid);
  font-size: var(--font-size-base);
  line-height: 1.65;
  padding-left: 1.25rem;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

/* ---- Overview ---- */
.ls-overview-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 60ch;
}

/* ============================================================
   NEXT PROJECT
   ============================================================ */

.ls-next {
  padding: 1.5rem 8rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.ls-next-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--next-label);
}

.ls-next-link {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--next-link);
  text-decoration: none;
  transition: color 0.2s;
}

.ls-next-link:hover { color: var(--next-hover-link); }

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */

[data-animate] {
  opacity: 0;
  transform: translateY(26px);
  will-change: transform, opacity;
  transition:
    opacity  820ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 820ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-animate="fade-only"] {
  opacity: 0;
  transform: none;
  will-change: opacity;
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-animate].revealed,
[data-animate="fade-only"].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   MAIN FEATURES — Video phone mockups
   ============================================================ */

.ls-features {
  padding: 3rem 10rem 5rem;
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.ls-features-inner {
  width: 100%;
}

.ls-features-heading {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.90);
  letter-spacing: 0.01em;
  margin: 0 0 3rem;
}

/* [text-left] [phone-lower] [phone-higher] [text-right] */
.ls-features-showcase {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1.25rem, 3vw, 2.75rem);
}

.ls-features-showcase + .ls-features-showcase {
  margin-top: clamp(7rem, 20vh, 10rem);
}

.ls-feat-text {
  flex: 0 0 auto;
  width: clamp(130px, 13vw, 175px);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ls-feat-text--left  { text-align: right; margin-top: clamp(10rem, 15vh, 20rem); }
.ls-feat-text--right { text-align: left; }

.ls-feat-title {
  display: block;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.90);
  line-height: 1.3;
}

.ls-feat-body {
  font-size: var(--font-size-base);
  line-height: 1.62;
  color: rgba(255, 255, 255, 0.55);
  margin: 0;
}

.ls-phone-wrap { flex: 0 0 auto; }

/* Left phone staggered down */
.ls-phone-wrap--lower {
  margin-top: clamp(110px, 60vh, 128px);
}

.ls-screen-video {
  display: block;
  width: clamp(160px, 15vw, 220px);
  height: auto;
  border-radius: 40px;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4);
}

.ls-phone-wrap--higher .ls-screen-video {
  width: clamp(240px, 22.5vw, 330px);
  border-radius: 60px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1200px) {
  .ls-features { padding: 2.5rem 6rem 4rem; }
}

@media (max-width: 1024px) {
  .ls-card-section     { padding: 4rem 6rem; }
  .ls-card-section--sm { padding: 3rem 6rem; }
  .ls-features         { padding: 2.5rem 4rem 4rem; }
}

@media (max-width: 768px) {
  /* Collapse stack to normal flow */
  .ls-stack {
    height: auto;
    display: flex;
    flex-direction: column;
  }

  .ls-peek-card {
    position: relative;
    top: auto; left: auto; right: auto; bottom: auto;
    height: 16px;
    border-radius: 20px 20px 0 0;
    align-items: center;
    flex-shrink: 0;
  }

  .ls-peek-card:nth-child(n+2) { border-radius: 0; }

  .ls-peek-card:hover ~ .ls-peek-card,
  .ls-peek-card:hover ~ .ls-hero-card {
    transform: none;
  }

  .ls-peek-card__label { opacity: 1; }

  .ls-stack .ls-hero-card {
    position: relative;
    top: auto; left: auto; right: auto; bottom: auto;
    min-height: unset;
    z-index: auto;
    flex: 1;
    border-radius: 0;
  }

  /* Single-column hero */
  .ls-hero-card {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .ls-card-left  { padding: 1.75rem 1.5rem 2rem; }

  .ls-card-right {
    min-height: 60vw;
    order: -1;
  }

  .ls-card-art img {
    width: 90%;
    height: auto;
    object-fit: contain;
  }

  .ls-card-section        { padding: 3rem 1.75rem; min-height: auto; }
  .ls-card-section--sm   { padding: 2.5rem 1.75rem; }
  .ls-desc-inner p       { font-size: 1.375rem; }
  .ls-next               { padding: 1.5rem 1.5rem 0.5rem; }

  /* Features: stack text above phones, remove stagger */
  .ls-features { padding: 2.5rem 1.75rem 3.5rem; }
  .ls-features-showcase { flex-wrap: wrap; justify-content: center; gap: 1.25rem 1.5rem; }
  .ls-feat-text--left  { order: 1; width: 100%; text-align: center; }
  .ls-phone-wrap--lower  { order: 2; margin-top: 0; }
  .ls-phone-wrap--higher { order: 3; }
  .ls-feat-text--right { order: 4; width: 100%; text-align: center; }
  .ls-screen-video { width: min(165px, 42vw); border-radius: 22px; }
}

@media (max-width: 480px) {
  .ls-main         { padding: 0 0.625rem 2rem; }
  .ls-hero-card    { border-radius: 16px 16px 0 0; }
  .ls-peek-card    { border-radius: 16px 16px 0 0; }
  .ls-content-card { border-radius: 0 0 16px 16px; }
  .outer-nav    { padding: 0.625rem 1rem; }
  .ls-desc-inner p { font-size: 1.25rem; }
  .ls-ack-list     { grid-template-columns: 6rem 1fr; }

  /* Features: full column stack */
  .ls-features-showcase { flex-direction: column; align-items: center; }
  .ls-phone-wrap--lower,
  .ls-phone-wrap--higher { order: unset; }
  .ls-feat-text--left,
  .ls-feat-text--right   { order: unset; }
  .ls-screen-video { width: min(190px, 58vw); border-radius: 20px; }
}