/* ============================================
   timebacklab — Homepage
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  overflow-x: hidden;
  color: #26292A;
}

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

a {
  text-decoration: none;
}

/* ============================================
   NAV
   ============================================ */

#site-nav {
  position: fixed;
  top: 16px;
  left: 50%;
  width: calc(100% - 48px);
  max-width: 1500px;
  z-index: 1000;
  padding: 10px 14px 10px 24px;
  background: #FBF9F2;
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(60, 79, 84, 0.14);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform: translate(-50%, 0);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-radius 0.2s ease;
}

#site-nav.hidden {
  transform: translate(-50%, calc(-100% - 28px));
}

#site-nav.scrolled {
  box-shadow: 0 14px 34px rgba(60, 79, 84, 0.18);
}

#site-nav.menu-open {
  border-radius: 22px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 40px;
}

.logo {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.04em;
  white-space: nowrap;
}

.logo-timeback {
  color: #26292A;
}

.logo-lab {
  color: #C6E000;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: #26292A;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: #946B3F;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #26292A;
  color: white;
  border: none;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.contact-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(60, 79, 84, 0.18);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: #26292A;
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

.nav-mobile-panel {
  display: none;
}

/* ============================================
   SHARED SECTION LAYOUT
   ============================================ */

main {
  margin-top: 0;
}

.sec {
  width: 100%;
  padding: 110px 0;
}

.sec-volt { background: #C6E000; }
.sec-yellow { background: #FFD400; }
.sec-maroon { background: #780016; }

.sec-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 80px;
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 64px;
}

.sec-content {
  max-width: 680px;
}

.sec-content h2,
.problem-copy h2,
.lab-heading h2 {
  font-size: clamp(40px, 6.5vw, 88px);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.045em;
  margin-bottom: 32px;
}

.sec-content p,
.problem-copy p {
  font-size: 18px;
  line-height: 1.7;
  font-weight: 400;
}

.cta-row {
  display: flex;
  gap: 16px;
  margin-top: 40px;
  flex-wrap: wrap;
  align-items: center;
}

.cta-row-center {
  justify-content: center;
  margin-top: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  padding: 16px 28px;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.btn-square {
  border-radius: 12px;
}

.btn-pill {
  border-radius: 999px;
  padding: 16px 32px;
}

/* ============================================
   MARQUEE (Section 01)
   ============================================ */

.marquee-container {
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 12px;
}

.marquee-track {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 12px;
  height: fit-content;
}

.marquee-item {
  flex-shrink: 0;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 32px;
  overflow: hidden;
}

.marquee-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================
   PROBLEM SECTION (Section 02)
   ============================================ */

.sec-problem {
  background: #480078;
  padding: 80px 64px;
}

.problem-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1600px;
  margin: 0 auto;
}

.problem-copy h2 {
  color: #C8B4EE;
}

.problem-copy p {
  color: #C8B4EE;
  line-height: 1.8;
}

.problem-cards {
  display: flex;
  gap: 28px;
  align-items: flex-start;
}

.card-stat {
  background: #FF4081;
  border-radius: 28px;
  padding: 28px 22px;
  color: white;
  box-shadow: 0 12px 32px rgba(0,0,0,0.2);
  flex: 0 0 280px;
  width: 280px;
  height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.card-stat-number {
  font-size: 88px;
  font-weight: 900;
  color: #780016;
  line-height: 0.9;
  margin-bottom: 16px;
}

.card-stat-label {
  font-size: 19px;
  font-weight: 600;
  color: white;
  line-height: 1.3;
}

.card-eaters {
  background: #C87DFF;
  border-radius: 28px;
  padding: 28px;
  color: white;
  box-shadow: 0 12px 32px rgba(0,0,0,0.2);
  flex: 1.35;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 230px;
  margin-top: 56px;
  position: relative;
  overflow: hidden;
}

.card-eaters-title {
  font-size: 26px;
  font-weight: 800;
  color: white;
  line-height: 1.1;
  margin-bottom: 24px;
}

.eaters-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: auto;
}

.eater-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 16px;
  font-weight: 600;
  color: white;
}

.eater-icon {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
}

.time-monster {
  width: calc(100% + 80px);
  margin: 18px -40px -40px -40px;
}

/* ============================================
   FRICTION / COLLAGE (Section 03)
   ============================================ */

.collage-wrap {
  width: 100%;
}

/* ============================================
   TIMEBACK LAB (Section 04)
   ============================================ */

.sec-lab {
  background: #00BBFF;
  padding: 110px 0;
}

.lab-inner {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 64px;
}

.lab-heading {
  margin-bottom: 64px;
  text-align: center;
}

.lab-heading h2 {
  color: #C6E000;
  margin-bottom: 24px;
}

.lab-heading p {
  font-size: 18px;
  line-height: 1.7;
  color: #ffffff;
  max-width: 900px;
  margin: 0 auto;
}

.lab-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.lab-card {
  background: #DD004C;
  border-radius: 18px;
  padding: 44px 40px;
}

.lab-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #FFC2CE;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
}

.lab-card h3 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.0;
  color: #FFC2CE;
  margin-bottom: 20px;
}

.lab-card p {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255,255,255,0.85);
}

/* ============================================
   FINAL CTA (Section 05)
   ============================================ */

.sec-maroon {
  padding: 110px 0;
}

.maroon-inner {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.sec-maroon .sec-content {
  flex: 1 1 0;
  min-width: 0;
}

.cupcake-wrap {
  flex: 0 0 250px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.cupcake-wrap img {
  width: 249px;
  height: auto;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background: #ffc2ce;
  padding: 120px 24px 60px;
  position: relative;
  overflow: hidden;
}

.footer-slash {
  position: absolute;
  top: -0.18em;
  right: calc(50% - 450px);
  font-size: 110vh;
  font-weight: 900;
  color: #C6E000;
  line-height: 1;
  pointer-events: none;
  z-index: 0;
  white-space: nowrap;
  user-select: none;
  letter-spacing: -0.02em;
  opacity: 0.9;
}

.footer-card {
  background: #FBF9F2;
  border-radius: 18px;
  max-width: 1500px;
  margin: 0 auto;
  padding: 60px 64px;
  position: relative;
  z-index: 1;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
}

.footer-section h3 {
  font-size: 14px;
  font-weight: 700;
  color: #26292A;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 12px;
}

.footer-section a {
  color: #3C4F54;
  font-size: 14px;
  transition: color 0.15s ease;
}

.footer-section a:hover {
  color: #946B3F;
}

.footer-bottom {
  max-width: 1500px;
  margin: 60px auto 0;
  padding-top: 40px;
  border-top: 1px solid #E8E8E8;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: #999;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-social {
  display: flex;
  gap: 24px;
}

.footer-social a {
  color: #999;
}

/* ============================================
   RESPONSIVE — TABLET (≤980px)
   ============================================ */

@media (max-width: 980px) {
  .sec-inner,
  .problem-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 0 32px;
  }

  .sec {
    padding: 80px 0;
  }

  .sec-problem {
    padding: 64px 32px;
  }

  .sec-content,
  .problem-copy {
    max-width: 100%;
  }

  .problem-cards {
    order: 2;
  }

  .problem-copy {
    order: 1;
  }

  .lab-inner {
    padding: 0 32px;
  }

  .lab-cards {
    grid-template-columns: 1fr 1fr;
  }

  .sec-lab {
    padding: 80px 0;
  }

  .maroon-inner {
    padding: 0 32px;
    flex-wrap: wrap;
  }

  footer {
    padding: 96px 24px 48px;
  }

  .footer-card {
    padding: 48px 36px;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 36px 24px;
  }
}

/* ============================================
   RESPONSIVE — MOBILE (≤640px)
   ============================================ */

@media (max-width: 640px) {
  #site-nav {
    top: 12px;
    width: calc(100% - 32px);
    padding: 10px 12px 10px 18px;
    border-radius: 22px;
    flex-wrap: wrap;
  }

  .nav-left {
    gap: 0;
  }

  .nav-links {
    display: none;
  }

  .nav-right .contact-btn {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  #site-nav.menu-open .nav-mobile-panel {
    display: flex;
  }

  .nav-mobile-panel {
    flex-direction: column;
    width: 100%;
    gap: 4px;
    padding-top: 16px;
    margin-top: 10px;
    border-top: 1px solid rgba(38,41,42,0.1);
  }

  .nav-mobile-panel a {
    color: #26292A;
    font-size: 16px;
    font-weight: 500;
    padding: 10px 4px;
  }

  .nav-mobile-panel .contact-btn {
    margin-top: 8px;
    width: 100%;
    text-align: center;
  }

  .sec {
    padding: 64px 0;
  }

  .sec-volt {
    padding-top: 116px;
  }

  .sec-inner,
  .problem-inner {
    padding: 0 20px;
    gap: 36px;
  }

  .sec-content h2,
  .problem-copy h2,
  .lab-heading h2 {
    font-size: clamp(34px, 11vw, 48px);
    margin-bottom: 20px;
  }

  .sec-content p,
  .problem-copy p {
    font-size: 16px;
    line-height: 1.6;
  }

  .cta-row {
    margin-top: 28px;
    gap: 12px;
  }

  .btn {
    font-size: 15px;
    padding: 14px 22px;
    width: 100%;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }

  .marquee-item {
    border-radius: 20px;
  }

  .sec-problem {
    padding: 56px 20px;
  }

  .problem-cards {
    flex-direction: column;
    gap: 16px;
  }

  .card-stat {
    width: 100%;
    flex: 1 1 auto;
    height: auto;
    padding: 24px 22px;
  }

  .card-stat-number {
    font-size: 64px;
  }

  .card-eaters {
    margin-top: 0;
    width: 100%;
  }

  .time-monster {
    width: calc(100% + 56px);
    margin: 18px -28px -28px -28px;
  }

  .lab-cards {
    grid-template-columns: 1fr;
  }

  .lab-card {
    padding: 32px 28px;
  }

  .lab-card h3 {
    font-size: 28px;
  }

  .sec-lab {
    padding: 56px 0;
  }

  .lab-inner {
    padding: 0 20px;
  }

  .lab-heading {
    margin-bottom: 40px;
  }

  .cta-row-center {
    margin-top: 36px;
  }

  .sec-maroon {
    padding: 56px 0;
  }

  .maroon-inner {
    padding: 0 20px;
    flex-direction: column-reverse;
    text-align: center;
  }

  .maroon-inner .cta-row {
    align-items: center;
  }

  .cupcake-wrap {
    flex: 0 0 auto;
  }

  .cupcake-wrap img {
    width: 150px;
  }

  footer {
    padding: 72px 16px 40px;
  }

  .footer-card {
    padding: 36px 24px;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 32px 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-slash {
    font-size: 60vh;
    right: -10vw;
  }
}