/* GameConnect Chess — landing page (scoped; does not affect board/auth UI) */

:root {
  --gc-landing-purple: #7b5ea7;
  --gc-landing-purple-dark: #63458c;
  --gc-landing-purple-deep: #4a3568;
  --gc-landing-purple-light: #c4b5fd;
  --gc-landing-pink: #f472b6;
  --gc-landing-text: #f8f7ff;
  --gc-landing-muted: rgba(248, 247, 255, 0.72);
  --gc-landing-card: rgba(255, 255, 255, 0.08);
  --gc-landing-card-border: rgba(255, 255, 255, 0.14);
  --gc-landing-shadow: 0 24px 60px rgba(20, 10, 40, 0.45);
  --gc-landing-radius: 20px;
  --gc-landing-header-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
}

.gc-landing-body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--gc-landing-text);
  background: #120a1f;
  overflow-x: hidden;
}

.gc-landing-page {
  position: relative;
  min-height: 100vh;
}

.gc-landing-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 90% 60% at 15% 10%, rgba(139, 92, 246, 0.35) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 85% 20%, rgba(244, 114, 182, 0.22) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 50% 100%, rgba(99, 69, 140, 0.4) 0%, transparent 55%),
    linear-gradient(165deg, #1a0f2e 0%, #2d1b4e 38%, #1e1235 100%);
}

.gc-landing-bg__grid {
  position: absolute;
  inset: 0;
  opacity: 0.07;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 20%, transparent 75%);
}

.gc-landing-float {
  position: absolute;
  width: clamp(2.5rem, 6vw, 4.5rem);
  height: clamp(2.5rem, 6vw, 4.5rem);
  opacity: 0.14;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.35));
  animation: gc-landing-float 8s ease-in-out infinite;
}

.gc-landing-float--1 { top: 12%; left: 8%; animation-delay: 0s; }
.gc-landing-float--2 { top: 22%; right: 10%; animation-delay: -2s; width: 3.2rem; height: 3.2rem; }
.gc-landing-float--3 { bottom: 18%; left: 12%; animation-delay: -4s; }
.gc-landing-float--4 { bottom: 28%; right: 6%; animation-delay: -1s; opacity: 0.1; }

@keyframes gc-landing-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-14px) rotate(4deg); }
}

/* Header */
.gc-landing-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--gc-landing-header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
  background: rgba(18, 10, 31, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.gc-landing-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--gc-landing-text);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.gc-landing-brand__mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--gc-landing-purple) 0%, var(--gc-landing-purple-dark) 100%);
  box-shadow: 0 6px 18px rgba(123, 94, 167, 0.5);
  font-size: 1.15rem;
  line-height: 1;
}

.gc-landing-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.gc-landing-nav__links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.gc-landing-nav__links a:not(.gc-landing-btn) {
  color: var(--gc-landing-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.gc-landing-nav__links a:not(.gc-landing-btn):hover,
.gc-landing-nav__links a:not(.gc-landing-btn):focus-visible {
  color: var(--gc-landing-text);
}

.gc-landing-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.5rem;
  padding-left: 0.75rem;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.gc-landing-nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--gc-landing-text);
  cursor: pointer;
  padding: 0;
}

.gc-landing-nav-toggle__bar {
  display: block;
  width: 1.15rem;
  height: 2px;
  margin: 0.22rem auto;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Buttons */
.gc-landing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.62rem 1.15rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  white-space: nowrap;
}

.gc-landing-btn:focus-visible {
  outline: 2px solid var(--gc-landing-purple-light);
  outline-offset: 2px;
}

.gc-landing-btn--ghost {
  color: var(--gc-landing-text);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.16);
}

.gc-landing-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.gc-landing-btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--gc-landing-purple) 0%, var(--gc-landing-purple-dark) 100%);
  box-shadow: 0 8px 24px rgba(123, 94, 167, 0.45);
}

.gc-landing-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(123, 94, 167, 0.55);
}

.gc-landing-btn--lg {
  padding: 0.85rem 1.65rem;
  font-size: 1rem;
}

/* Main layout */
.gc-landing-main {
  position: relative;
  z-index: 1;
}

.gc-landing-wrap {
  width: min(100%, 72rem);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

/* Hero */
.gc-landing-hero {
  padding: clamp(2.5rem, 8vw, 5rem) 0 clamp(3rem, 10vw, 6rem);
}

.gc-landing-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

@media (min-width: 960px) {
  .gc-landing-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }
}

.gc-landing-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  margin-bottom: 1.1rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gc-landing-purple-light);
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(196, 181, 253, 0.25);
}

.gc-landing-eyebrow__dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.8);
}

.gc-landing-hero__title {
  margin: 0 0 1rem;
  font-size: clamp(2.1rem, 5.5vw, 3.35rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.gc-landing-hero__title span {
  background: linear-gradient(90deg, #e9d5ff 0%, #f9a8d4 55%, #c4b5fd 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.gc-landing-hero__lead {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  color: var(--gc-landing-muted);
}

.gc-landing-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.gc-landing-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.gc-landing-hero__stats li {
  min-width: 5.5rem;
}

.gc-landing-hero__stats strong {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.gc-landing-hero__stats span {
  font-size: 0.82rem;
  color: var(--gc-landing-muted);
}

/* Hero visual */
.gc-landing-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 280px;
}

.gc-landing-visual__glow {
  position: absolute;
  width: min(90%, 420px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.35) 0%, transparent 68%);
  filter: blur(8px);
}

.gc-landing-visual__frame {
  position: relative;
  width: min(100%, 420px);
  padding: 0.65rem;
  border-radius: calc(var(--gc-landing-radius) + 4px);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.04) 100%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: var(--gc-landing-shadow);
}

.gc-landing-visual__board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  aspect-ratio: 1;
  border-radius: var(--gc-landing-radius);
  overflow: hidden;
  border: 4px solid rgba(20, 12, 32, 0.85);
}

.gc-landing-visual__sq {
  aspect-ratio: 1;
  position: relative;
}

.gc-landing-visual__sq--light { background: #f0d9b5; }
.gc-landing-visual__sq--dark { background: #b58863; }

.gc-landing-visual__piece {
  position: absolute;
  inset: 8%;
  width: 84%;
  height: 84%;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.35));
  pointer-events: none;
}

.gc-landing-visual__badge {
  position: absolute;
  bottom: -0.75rem;
  right: -0.5rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(135deg, var(--gc-landing-purple) 0%, var(--gc-landing-pink) 100%);
  box-shadow: 0 8px 20px rgba(123, 94, 167, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Sections */
.gc-landing-section {
  padding: clamp(3rem, 8vw, 5rem) 0;
}

.gc-landing-section__head {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
}

.gc-landing-section__head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.65rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.gc-landing-section__head p {
  margin: 0;
  color: var(--gc-landing-muted);
  font-size: 1.02rem;
}

.gc-landing-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .gc-landing-features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .gc-landing-features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.gc-landing-feature {
  padding: 1.35rem 1.25rem;
  border-radius: var(--gc-landing-radius);
  background: var(--gc-landing-card);
  border: 1px solid var(--gc-landing-card-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.gc-landing-feature:hover {
  transform: translateY(-3px);
  border-color: rgba(196, 181, 253, 0.35);
}

.gc-landing-feature__icon {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 0.85rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  background: rgba(139, 92, 246, 0.2);
  border: 1px solid rgba(196, 181, 253, 0.25);
}

.gc-landing-feature h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.gc-landing-feature p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--gc-landing-muted);
  line-height: 1.5;
}

/* Steps */
.gc-landing-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  counter-reset: gc-step;
}

@media (min-width: 768px) {
  .gc-landing-steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.gc-landing-step {
  position: relative;
  padding: 1.5rem 1.25rem 1.25rem;
  border-radius: var(--gc-landing-radius);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.gc-landing-step::before {
  counter-increment: gc-step;
  content: counter(gc-step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 0.85rem;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 800;
  color: #fff;
  background: var(--gc-landing-purple-dark);
}

.gc-landing-step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.gc-landing-step p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--gc-landing-muted);
}

/* CTA band */
.gc-landing-cta {
  margin: 0 clamp(1rem, 4vw, 2rem) clamp(3rem, 8vw, 5rem);
  padding: clamp(2rem, 5vw, 3rem);
  border-radius: calc(var(--gc-landing-radius) + 4px);
  text-align: center;
  background:
    linear-gradient(135deg, rgba(123, 94, 167, 0.45) 0%, rgba(244, 114, 182, 0.25) 100%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: var(--gc-landing-shadow);
}

.gc-landing-cta h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 800;
}

.gc-landing-cta p {
  margin: 0 auto 1.35rem;
  max-width: 32rem;
  color: var(--gc-landing-muted);
}

.gc-landing-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* Footer */
.gc-landing-footer {
  position: relative;
  z-index: 1;
  padding: 2rem clamp(1rem, 4vw, 2rem) 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 6, 18, 0.65);
}

.gc-landing-footer__inner {
  width: min(100%, 72rem);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
}

@media (min-width: 640px) {
  .gc-landing-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.gc-landing-footer__copy {
  margin: 0;
  font-size: 0.85rem;
  color: var(--gc-landing-muted);
}

.gc-landing-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.gc-landing-footer__links a {
  color: var(--gc-landing-muted);
  text-decoration: none;
  font-size: 0.85rem;
}

.gc-landing-footer__links a:hover,
.gc-landing-footer__links a:focus-visible {
  color: var(--gc-landing-text);
}

/* Mobile nav */
@media (max-width: 767px) {
  .gc-landing-nav-toggle {
    display: block;
  }

  .gc-landing-nav__panel {
    position: fixed;
    top: var(--gc-landing-header-h);
    left: 0;
    right: 0;
    padding: 1rem clamp(1rem, 4vw, 2rem) 1.5rem;
    background: rgba(18, 10, 31, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
  }

  .gc-landing-nav__panel--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .gc-landing-nav__links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .gc-landing-nav__links a:not(.gc-landing-btn) {
    padding: 0.65rem 0.25rem;
    font-size: 1rem;
  }

  .gc-landing-nav__actions {
    flex-direction: column;
    align-items: stretch;
    margin: 0.75rem 0 0;
    padding: 0.75rem 0 0;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .gc-landing-nav__actions .gc-landing-btn {
    width: 100%;
    justify-content: center;
  }

  /* Text sections only — keep hero board + CTA band unchanged */
  .gc-landing-hero__copy {
    padding-inline: 0.7rem;
  }

  .gc-landing-section__head {
    padding-inline: 0.7rem;
  }

  .gc-landing-feature,
  .gc-landing-step {
    padding-inline: 0.7rem;
  }

  .gc-landing-footer__inner {
    padding-inline: 0.7rem;
  }
}

@media (min-width: 768px) {
  .gc-landing-nav__panel {
    display: contents;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .gc-landing-float { animation: none; }
  .gc-landing-btn,
  .gc-landing-feature { transition: none; }
  .gc-landing-page--exit { animation: none; opacity: 0; }
}

@media (prefers-reduced-motion: no-preference) {
  .gc-landing-page--exit {
    animation: gc-landing-page-out 0.42s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    pointer-events: none;
  }
}

@keyframes gc-landing-page-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }

  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}