/* ══════════════════════════════════════════════════════════════════════
   11 Seconds — Tonal Kineticism Design System
   "The Neon Conservatory": vibrant life against deep charcoal.
   ══════════════════════════════════════════════════════════════════════ */

/* ── Tokens ───────────────────────────────────────────────────────── */
:root {
  /* Surface palette */
  --surface:               #0C0E11;
  --surface-container-low: #111417;
  --surface-container:     #171A1D;
  --surface-container-high:#1E2125;
  --surface-container-highest: #23262A;
  --surface-bright:        #292C31;

  /* Content */
  --on-surface:            #F9F9FD;
  --on-surface-variant:    #AAABAF;
  --on-surface-muted:      #6B6D71;

  /* Primary — neon green */
  --primary:               #4DFE90;
  --primary-dim:           #29E67C;
  --primary-container:     #003517;
  --on-primary:            #005D2D;

  /* Secondary — cyan */
  --secondary:             #86CBFF;
  --tertiary:              #00CDEC;

  /* Outline */
  --outline:               #5A5C60;
  --outline-variant:       rgba(70, 72, 75, 0.15);

  /* Radii */
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-pill: 9999px;

  /* Spacing */
  --section-pad: clamp(80px, 12vw, 160px);
  --content-max: 1200px;
}

/* ── Reset & Base ─────────────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  background: var(--surface);
  color: var(--on-surface);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

/* ── Ambient Glow ─────────────────────────────────────────────────── */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(120px);
  opacity: 0.12;
  z-index: 0;
}

.ambient-glow--hero {
  width: 800px;
  height: 800px;
  background: var(--primary);
  top: -300px;
  right: -200px;
  animation: glow-drift 20s ease-in-out infinite alternate;
}

.ambient-glow--mid {
  width: 600px;
  height: 600px;
  background: var(--tertiary);
  bottom: 20%;
  left: -200px;
  animation: glow-drift 25s ease-in-out infinite alternate-reverse;
}

@keyframes glow-drift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -30px) scale(1.15); }
}

/* ── Navigation ───────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 24px;
  transition: background 0.4s, backdrop-filter 0.4s;
}

.nav--scrolled {
  background: rgba(12, 14, 17, 0.7);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.nav__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-weight: 800;
  font-size: 1.25rem;
}

.nav__logo-icon {
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -1px;
}

.nav__logo-text {
  color: var(--on-surface);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: color 0.2s;
  letter-spacing: 0.01em;
}

.nav__link:hover {
  color: var(--on-surface);
}

.nav__link--cta {
  background: var(--primary-dim);
  color: var(--on-primary);
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
}

.nav__link--cta:hover {
  background: var(--primary);
  color: var(--on-primary);
  transform: translateY(-1px);
}

/* ── Hero ─────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  z-index: 1;
}

.hero__content {
  max-width: 720px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-container);
  color: var(--on-surface-variant);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 32px;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.8); }
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero__title-accent {
  color: var(--primary);
  position: relative;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--on-surface-variant);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 64px;
}

/* ── Timer Visual ─────────────────────────────────────────────────── */
.hero__timer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero__timer-ring {
  position: relative;
  width: 120px;
  height: 120px;
}

.hero__timer-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.hero__timer-track {
  fill: none;
  stroke: var(--surface-container-high);
  stroke-width: 4;
}

.hero__timer-progress {
  fill: none;
  stroke: var(--primary);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 339.292;
  stroke-dashoffset: 0;
  animation: timer-countdown 11s linear infinite;
  filter: drop-shadow(0 0 8px rgba(77, 254, 144, 0.4));
}

@keyframes timer-countdown {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 339.292; }
}

.hero__timer-value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -2px;
}

.hero__timer-label {
  font-size: 0.8125rem;
  color: var(--on-surface-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.btn--primary {
  background: var(--primary-dim);
  color: var(--on-primary);
}

.btn--primary:hover {
  background: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(77, 254, 144, 0.25);
}

.btn--ghost {
  background: var(--surface-container);
  color: var(--on-surface);
}

.btn--ghost:hover {
  background: var(--surface-container-high);
  transform: translateY(-2px);
}

.btn--lg {
  padding: 18px 36px;
  font-size: 1.0625rem;
}

.btn__icon {
  flex-shrink: 0;
}

/* ── Section Shared ───────────────────────────────────────────────── */
.section-header {
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--primary);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* ── Features ─────────────────────────────────────────────────────── */
.features {
  position: relative;
  padding: var(--section-pad) 24px;
  z-index: 1;
}

.features__inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--surface-container-low);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform 0.3s, background 0.3s;
}

.feature-card:hover {
  background: var(--surface-container);
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-container-high);
  border-radius: var(--radius-md);
  color: var(--primary);
  margin-bottom: 20px;
}

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 0.9375rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

/* ── Game Modes ───────────────────────────────────────────────────── */
.modes {
  position: relative;
  padding: var(--section-pad) 24px;
  z-index: 1;
}

.modes__inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.modes__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.mode-card {
  background: var(--surface-container-low);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, background 0.3s;
}

.mode-card:hover {
  transform: translateY(-4px);
  background: var(--surface-container);
}

.mode-card__number {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--on-surface-muted);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.mode-card__title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.mode-card__desc {
  font-size: 0.9375rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-bottom: 20px;
}

.mode-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--surface-container-high);
  color: var(--on-surface-variant);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.02em;
}

.mode-card__tag--pro {
  background: rgba(77, 254, 144, 0.12);
  color: var(--primary);
}

/* Mode card accent lines */
.mode-card--solo::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s;
}

.mode-card--duel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s;
}

.mode-card--matchmaking::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--tertiary) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s;
}

.mode-card--party::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #C77DFF 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s;
}

.mode-card:hover::before {
  opacity: 1;
}

/* ── CTA Section ──────────────────────────────────────────────────── */
.cta {
  position: relative;
  padding: var(--section-pad) 24px;
  z-index: 1;
}

.cta__inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  padding: 72px 48px;
  background: var(--surface-container-low);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.cta__glow {
  position: absolute;
  top: -60%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: var(--primary);
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.08;
  pointer-events: none;
}

.cta__eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--primary);
  margin-bottom: 16px;
  display: block;
  position: relative;
}

.cta__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  position: relative;
}

.cta__desc {
  color: var(--on-surface-variant);
  margin-bottom: 32px;
  font-size: 1.0625rem;
  position: relative;
}

/* ── Footer ───────────────────────────────────────────────────────── */
.footer {
  position: relative;
  padding: 64px 24px 32px;
  z-index: 1;
  border-top: 1px solid var(--outline-variant);
}

.footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__tagline {
  color: var(--on-surface-muted);
  font-size: 0.875rem;
  margin-top: 8px;
}

.footer__links {
  display: flex;
  gap: 64px;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__col-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--on-surface-muted);
  margin-bottom: 4px;
}

.footer__link {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  transition: color 0.2s;
}

.footer__link:hover {
  color: var(--on-surface);
}

.footer__bottom {
  padding-top: 24px;
  border-top: 1px solid var(--outline-variant);
}

.footer__copy {
  font-size: 0.75rem;
  color: var(--on-surface-muted);
  font-family: 'Inter', sans-serif;
}

/* ── Scroll Animations ────────────────────────────────────────────── */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Legal Page Styles ────────────────────────────────────────────── */
.legal {
  position: relative;
  z-index: 1;
  padding: 140px 24px var(--section-pad);
}

.legal__inner {
  max-width: 760px;
  margin: 0 auto;
}

.legal__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.legal__updated {
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  color: var(--on-surface-muted);
  margin-bottom: 48px;
}

.legal__content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 12px;
}

.legal__content h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 8px;
}

.legal__content p {
  color: var(--on-surface-variant);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.legal__content ul {
  color: var(--on-surface-variant);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 16px;
  padding-left: 24px;
}

.legal__content li {
  margin-bottom: 6px;
}

.legal__content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.legal__content a:hover {
  color: var(--primary-dim);
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links {
    gap: 16px;
  }

  .nav__link:not(.nav__link--cta) {
    display: none;
  }

  .modes__grid {
    grid-template-columns: 1fr;
  }

  .footer__top {
    flex-direction: column;
    gap: 32px;
  }

  .footer__links {
    gap: 40px;
  }

  .cta__inner {
    padding: 48px 24px;
  }

  .hero {
    padding-top: 100px;
    min-height: auto;
    padding-bottom: 60px;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

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

  .features__grid {
    grid-template-columns: 1fr;
  }
}