/*
 * AKT — Asa Katsu Tennis
 * Landing Page Stylesheet
 */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* =============================================
   2. Design Tokens
   ============================================= */
:root {
  /* Colors */
  --c-bg:        #0A0E1A;
  --c-bg-alt:    #0E1422;
  --c-bg-card:   #121828;
  --c-gold:      #C9A84C;
  --c-gold-lt:   #DDB95C;
  --c-white:     #F2EDE3;
  --c-text:      #878787;
  --c-text-lt:   #BCBCBC;
  --c-border:    rgba(201, 168, 76, 0.22);
  --c-border-dim: rgba(255, 255, 255, 0.06);

  /* Typography */
  --font-serif: 'Noto Serif JP', 'Georgia', serif;
  --font-sans:  'Noto Sans JP', sans-serif;
  --font-en:    'Cormorant Garamond', 'Georgia', serif;

  /* Spacing */
  --section-py: clamp(80px, 10vw, 140px);
  --container-x: clamp(24px, 5vw, 80px);
  --max-w: 1160px;

  /* Easing */
  --ease:     cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* =============================================
   3. Layout Utilities
   ============================================= */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--container-x);
}

.container--narrow {
  max-width: 740px;
}

.section {
  padding-block: var(--section-py);
}

/* =============================================
   4. Typography
   ============================================= */
.section-label {
  display: block;
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  color: var(--c-gold);
  text-transform: uppercase;
  margin-bottom: 28px;
}

.section-label--light {
  color: rgba(201, 168, 76, 0.7);
}

.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 400;
  color: var(--c-white);
  line-height: 1.55;
  margin-bottom: 64px;
}

/* =============================================
   5. Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 36px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1;
  cursor: pointer;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
  white-space: nowrap;
}

.btn--gold {
  background: var(--c-gold);
  color: var(--c-bg);
  border: 1px solid var(--c-gold);
}

.btn--gold:hover {
  background: var(--c-gold-lt);
  border-color: var(--c-gold-lt);
}

.btn--outline {
  background: transparent;
  color: var(--c-gold);
  border: 1px solid var(--c-border);
}

.btn--outline:hover {
  border-color: var(--c-gold);
}

.btn--sm {
  padding: 10px 22px;
  font-size: 0.78rem;
}

.btn--lg {
  padding: 20px 52px;
  font-size: 0.95rem;
}

/* =============================================
   6. Logo
   ============================================= */
.logo {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1;
  gap: 0;
}

.logo__main {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 300;
  letter-spacing: 0.55em;
  text-indent: 0.55em;
  color: var(--c-gold);
  line-height: 1;
}

.logo__rule {
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, var(--c-gold), transparent);
  opacity: 0.35;
  margin-block: 5px;
}

.logo__sub {
  font-family: var(--font-en);
  font-size: 5.5px;
  letter-spacing: 0.55em;
  text-indent: 0.55em;
  color: var(--c-text);
  text-transform: uppercase;
  line-height: 1;
}

/* =============================================
   7. Header
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 26px var(--container-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.5s var(--ease), padding 0.5s var(--ease), border-color 0.5s;
  border-bottom: 1px solid transparent;
}

.header.is-scrolled {
  background: rgba(10, 14, 26, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding-block: 18px;
  border-bottom-color: rgba(255, 255, 255, 0.04);
}

/* =============================================
   8. Floating CTA
   ============================================= */
.floating-cta {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 99;
  padding: 13px 26px;
  background: var(--c-gold);
  color: var(--c-bg);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease), background 0.3s;
  pointer-events: none;
}

.floating-cta.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.floating-cta:hover {
  background: var(--c-gold-lt);
}

/* =============================================
   9. Hero
   ============================================= */
.hero {
  position: relative;
  height: 100svh;
  min-height: 640px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  will-change: transform;
}

.hero__bg img {
  width: 100%;
  height: 115%;
  object-fit: cover;
  object-position: center 30%;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    145deg,
    rgba(10, 14, 26, 0.88) 0%,
    rgba(10, 14, 26, 0.55) 55%,
    rgba(10, 14, 26, 0.72) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-top: 100px;
}

.hero__eyebrow {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.45em;
  color: var(--c-gold);
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 0.4s forwards;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6.5vw, 5.2rem);
  font-weight: 400;
  color: var(--c-white);
  line-height: 1.28;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp 1.1s var(--ease-out) 0.6s forwards;
}

.hero__sub {
  font-size: clamp(0.85rem, 1.4vw, 1rem);
  font-weight: 300;
  color: var(--c-text-lt);
  line-height: 2.1;
  margin-bottom: 52px;
  opacity: 0;
  animation: fadeUp 1.1s var(--ease-out) 0.8s forwards;
}

.hero__btn {
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 1s forwards;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0;
  animation: fadeIn 1.2s var(--ease) 1.6s forwards;
}

.hero__scroll-hint span {
  font-family: var(--font-en);
  font-size: 0.58rem;
  letter-spacing: 0.38em;
  color: var(--c-text);
}

.hero__scroll-bar {
  width: 1px;
  height: 52px;
  background: linear-gradient(to bottom, var(--c-gold) 0%, transparent 100%);
  animation: scrollPulse 2.4s ease-in-out 2s infinite;
  transform-origin: top;
}

/* =============================================
   10. Story
   ============================================= */
.story {
  background: var(--c-bg-alt);
}

.story__heading {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 400;
  color: var(--c-white);
  line-height: 1.65;
  margin-bottom: 44px;
}

.story__body {
  font-size: clamp(0.875rem, 1.4vw, 1rem);
  color: var(--c-text-lt);
  line-height: 2.2;
}

.story__body p + p {
  margin-top: 20px;
}

.story__turn {
  margin-top: 56px;
  font-family: var(--font-serif);
  font-size: clamp(0.875rem, 1.3vw, 1rem);
  color: var(--c-gold);
  letter-spacing: 0.04em;
  font-style: italic;
}

/* =============================================
   11. Vision
   ============================================= */
.vision {
  position: relative;
  overflow: hidden;
  text-align: center;
}

.vision__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.vision__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.vision__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 26, 0.82);
}

.vision .container {
  position: relative;
  z-index: 1;
}

.vision .section-label {
  display: block;
  margin-inline: auto;
  width: fit-content;
}

.vision__quote {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3vw, 2.4rem);
  font-weight: 400;
  color: var(--c-white);
  line-height: 1.8;
  margin-bottom: 36px;
  font-style: normal;
}

.vision__desc {
  font-size: clamp(0.85rem, 1.3vw, 0.95rem);
  color: var(--c-text-lt);
  line-height: 2.3;
}

/* =============================================
   12. Values
   ============================================= */
.values {
  background: var(--c-bg-alt);
}

.values__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.value-card {
  position: relative;
  background: var(--c-bg-card);
  padding: 44px 36px 40px;
  overflow: hidden;
  transition: transform 0.4s var(--ease);
}

.value-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid var(--c-gold);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}

.value-card:hover::after {
  opacity: 1;
}

.value-card:hover {
  transform: translateY(-5px);
}

.value-card__num {
  position: absolute;
  top: 24px;
  right: 26px;
  font-family: var(--font-en);
  font-size: 4rem;
  font-weight: 300;
  line-height: 1;
  color: var(--c-gold);
  opacity: 0.1;
  letter-spacing: -0.02em;
  user-select: none;
}

.value-card__icon {
  width: 42px;
  height: 42px;
  color: var(--c-gold);
  margin-bottom: 26px;
}

.value-card__icon svg {
  width: 100%;
  height: 100%;
}

.value-card__en {
  font-family: var(--font-en);
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.38em;
  color: var(--c-gold);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.value-card__ja {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--c-white);
  margin-bottom: 18px;
}

.value-card__desc {
  font-size: 0.865rem;
  color: var(--c-text);
  line-height: 1.95;
}

/* =============================================
   13. Members
   ============================================= */
.members {
  background: var(--c-bg);
  text-align: center;
}

.members__heading {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 400;
  color: var(--c-white);
  line-height: 1.4;
  margin-bottom: 14px;
}

.members__sub {
  font-size: 0.9rem;
  color: var(--c-text);
  margin-bottom: 64px;
}

.members__list {
  text-align: left;
  margin-bottom: 52px;
}

.members__item {
  display: flex;
  align-items: center;
  gap: 22px;
  padding-block: 22px;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.8vw, 1.1rem);
  font-weight: 400;
  color: var(--c-text-lt);
  border-bottom: 1px solid var(--c-border-dim);
  transition: color 0.3s var(--ease);
}

.members__item:first-child {
  border-top: 1px solid var(--c-border-dim);
}

.members__item:hover {
  color: var(--c-white);
}

.members__dash {
  display: block;
  flex-shrink: 0;
  width: 22px;
  height: 1px;
  background: var(--c-gold);
}

.members__note {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--c-text);
}

/* =============================================
   14. Roadmap
   ============================================= */
.roadmap {
  background: var(--c-bg-alt);
}

.roadmap__track {
  display: flex;
  align-items: center;
  gap: 0;
}

.roadmap__step {
  flex: 1;
}

.roadmap__step-box {
  padding: 36px 28px 32px;
  border: 1px solid var(--c-border-dim);
  height: 100%;
}

.roadmap__step-box--active {
  border-color: var(--c-gold);
}

.roadmap__num {
  display: block;
  font-family: var(--font-en);
  font-size: 0.6rem;
  letter-spacing: 0.38em;
  color: var(--c-gold);
  margin-bottom: 10px;
}

.roadmap__tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--c-gold);
  color: var(--c-bg);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  font-weight: 400;
  margin-bottom: 18px;
}

.roadmap__title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--c-white);
  margin-bottom: 14px;
}

.roadmap__desc {
  font-size: 0.84rem;
  color: var(--c-text);
  line-height: 2;
}

.roadmap__arrow {
  width: 56px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding-inline: 4px;
  color: rgba(201, 168, 76, 0.4);
}

.roadmap__arrow svg {
  width: 100%;
  height: 10px;
}

.roadmap__arrow span {
  font-size: 14px;
  color: rgba(201, 168, 76, 0.5);
  line-height: 1;
  margin-top: -4px;
}

/* =============================================
   15. Join
   ============================================= */
.join {
  position: relative;
  text-align: center;
  overflow: hidden;
}

.join__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.join__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.join__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 14, 26, 0.9) 0%,
    rgba(10, 14, 26, 0.8) 100%
  );
}

.join .container {
  position: relative;
  z-index: 1;
}

.join .section-label {
  display: block;
  margin-inline: auto;
  width: fit-content;
}

.join__heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 400;
  color: var(--c-white);
  line-height: 1.3;
  margin-bottom: 24px;
}

.join__sub {
  font-size: clamp(0.875rem, 1.4vw, 1rem);
  color: var(--c-text-lt);
  line-height: 2.1;
  margin-bottom: 44px;
}

.join__badge {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--c-border);
  margin-bottom: 44px;
}

.join__badge-left {
  padding: 10px 22px;
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.32em;
  color: var(--c-gold);
}

.join__badge-sep {
  display: block;
  width: 1px;
  height: 32px;
  background: var(--c-border);
}

.join__badge-right {
  padding: 10px 22px;
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.24em;
  color: var(--c-text);
}

.join__btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.join__handle {
  font-family: var(--font-en);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--c-text);
  font-style: italic;
}

/* =============================================
   16. Footer
   ============================================= */
.footer {
  background: #070910;
  padding-block: 44px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer__sns {
  color: var(--c-text);
  transition: color 0.3s;
}

.footer__sns:hover {
  color: var(--c-gold);
}

.footer__copy {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: rgba(135, 135, 135, 0.45);
}

/* =============================================
   17. Scroll Reveal
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--d1.is-visible { transition-delay: 0.08s; }
.reveal--d2.is-visible { transition-delay: 0.18s; }
.reveal--d3.is-visible { transition-delay: 0.28s; }
.reveal--d4.is-visible { transition-delay: 0.38s; }

/* =============================================
   18. Keyframe Animations
   ============================================= */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scrollPulse {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 1; }
  45%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  55%  { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* =============================================
   19. Responsive
   ============================================= */
@media (max-width: 1023px) {
  .roadmap__arrow {
    width: 36px;
  }
}

@media (max-width: 767px) {
  /* Hero */
  .hero__sub br {
    display: none;
  }

  /* Vision */
  .vision__desc br {
    display: none;
  }

  /* Values: single column */
  .values__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .value-card {
    padding: 36px 28px 32px;
  }

  /* Roadmap: vertical stack */
  .roadmap__track {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .roadmap__arrow {
    width: auto;
    flex-direction: row;
    justify-content: center;
    padding-inline: 0;
    padding-block: 4px;
    transform: rotate(90deg);
  }

  .roadmap__arrow svg {
    width: 48px;
    height: 10px;
  }

  /* Join button */
  .join__btn {
    padding-inline: 28px;
    font-size: 0.82rem;
  }

  /* Floating CTA: full width */
  .floating-cta {
    left: 16px;
    right: 16px;
    bottom: 16px;
    text-align: center;
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: 2.2rem;
  }

  .btn--lg {
    padding: 18px 32px;
  }
}