/* ============================================================
   Pontalelab — Main Stylesheet
   Nature & Discovery theme for a family-oriented digital lab
   ============================================================ */

/* ===========================
   1. CSS Variables
   =========================== */
:root {
  /* Nature palette */
  --sky:        #c8e8ff;
  --forest-xlt: #e8f5ee;
  --forest-lt:  #95d5b2;
  --forest:     #52b788;
  --forest-dk:  #2d6a4f;
  --forest-xdk: #1b4332;

  /* Warm accent (CTA buttons) */
  --accent:     #e07800;
  --accent-dk:  #c06200;
  --accent-lt:  #fff3e0;

  /* UI surfaces */
  --bg:         #fafaf3;
  --bg-card:    #ffffff;
  --bg-tint:    #f0f7f3;
  --text:       #1b4332;
  --text-mid:   #3d6652;
  --text-lt:    #6b9e82;
  --border:     #c8e0d4;

  /* Shadows */
  --shadow-sm:  0 2px 8px  rgba(27, 67, 50, 0.08);
  --shadow-md:  0 4px 20px rgba(27, 67, 50, 0.12);
  --shadow-lg:  0 8px 32px rgba(27, 67, 50, 0.18);
  --shadow-cta: 0 6px 20px rgba(224, 120, 0, 0.42);

  /* Shape */
  --r-sm:   10px;
  --r-md:   18px;
  --r-lg:   28px;
  --r-pill: 999px;

  /* Layout */
  --max-w:      1100px;
  --px:         clamp(16px, 5vw, 40px);
  --section-py: clamp(48px, 8vw, 96px);

  /* Typography */
  --font: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'BIZ UDGothic',
          Meiryo, 'Yu Gothic UI', system-ui, sans-serif;
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

img   { max-width: 100%; height: auto; display: block; }
a     { color: inherit; text-decoration: none; }
ul    { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

/* ===========================
   3. Layout Helpers
   =========================== */
.inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
}

.section-title {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 800;
  color: var(--forest-xdk);
  margin-bottom: clamp(24px, 4vw, 48px);
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 44px;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 8px;
}

/* ===========================
   4. Buttons
   =========================== */

/* Hero CTA — largest, most prominent */
.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 72px;
  padding: 0 52px;
  font-size: 1.25rem;
  font-weight: 900;
  color: #fff;
  background: var(--accent);
  border-radius: var(--r-pill);
  box-shadow: var(--shadow-cta), 0 2px 0 rgba(0,0,0,0.15);
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn-hero:hover {
  background: var(--accent-dk);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(224,120,0,0.55), 0 2px 0 rgba(0,0,0,0.15);
}
.btn-hero:active { transform: translateY(0); }

/* Game card Play button — large, full-width */
.btn-play {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 64px;
  width: 100%;
  font-size: 1.2rem;
  font-weight: 900;
  color: #fff;
  background: var(--accent);
  border-radius: var(--r-pill);
  box-shadow: var(--shadow-cta);
  transition: transform 0.15s, box-shadow 0.15s;
  margin-top: 4px;
}
.btn-play:hover {
  background: var(--accent-dk);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(224,120,0,0.55);
}
.btn-play:active { transform: scale(0.98); }

/* Disabled state for coming-soon games */
.btn-disabled {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 64px;
  width: 100%;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-lt);
  background: var(--bg-tint);
  border: 2px solid var(--border);
  border-radius: var(--r-pill);
  cursor: default;
  margin-top: 4px;
}

/* Standard button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 52px;
  padding: 0 28px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--r-pill);
  transition: transform 0.15s, background 0.15s;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-cta);
}
.btn-primary:hover { background: var(--accent-dk); transform: translateY(-2px); }

/* ===========================
   5. Header
   =========================== */
.header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(250, 250, 243, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
  height: 64px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--forest-xdk);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.logo-dot { color: var(--accent); }

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--r-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-mid);
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover {
  background: var(--bg-tint);
  color: var(--forest-dk);
}

.lang-btn {
  padding: 6px 18px;
  border: 2px solid var(--forest);
  border-radius: var(--r-pill);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--forest-dk);
  background: transparent;
  transition: background 0.15s, color 0.15s;
  margin-left: 4px;
}
.lang-btn:hover {
  background: var(--forest);
  color: #fff;
}

@media (max-width: 560px) {
  .nav-link.hide-sm { display: none; }
}

/* ===========================
   6. Hero
   =========================== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(165deg,
    #c8e8ff 0%,
    #a0d4b8 35%,
    #52b788 65%,
    #2d6a4f 100%
  );
}

/* Decorative atmospheric circles */
.hero-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-deco span {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
}
.hero-deco span:nth-child(1) { width: 420px; height: 420px; top: -160px; right: -100px; }
.hero-deco span:nth-child(2) { width: 260px; height: 260px; bottom:  80px; left:  -80px; }
.hero-deco span:nth-child(3) { width: 160px; height: 160px; top:  40%; right:  8%;  }
.hero-deco span:nth-child(4) { width:  80px; height:  80px; top:  20%; left:  12%; }

.hero-content {
  position: relative;
  z-index: 1;
  padding: 80px var(--px) 150px;
  max-width: 720px;
  width: 100%;
}

.hero-title {
  font-size: clamp(3rem, 11vw, 5.5rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1.05;
  text-shadow: 0 2px 24px rgba(0,0,0,0.15);
  margin-bottom: 20px;
}

.hero-tagline {
  font-size: clamp(1rem, 3vw, 1.3rem);
  color: rgba(255,255,255,0.92);
  font-weight: 500;
  line-height: 1.65;
  margin-bottom: 52px;
  text-shadow: 0 1px 8px rgba(0,0,0,0.15);
}

/* SVG wave at hero bottom */
.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  pointer-events: none;
}
.hero-wave svg {
  display: block;
  width: 100%;
  height: 70px;
  fill: var(--bg);
}

/* ===========================
   7. Featured Games
   =========================== */
.sect-featured {
  padding: var(--section-py) var(--px);
  background: var(--bg);
}

.game-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 600px) {
  .game-cards { grid-template-columns: repeat(2, 1fr); }
}

.game-card {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: clamp(24px, 4vw, 40px) clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.game-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.game-card-icon { font-size: 3.5rem; line-height: 1; }

.game-card-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--forest-xdk);
}

.game-card-desc {
  color: var(--text-mid);
  font-size: 1rem;
  flex: 1;
}

/* ===========================
   8. Skills Section
   =========================== */
.sect-skills {
  padding: var(--section-py) var(--px);
  background: var(--bg-tint);
}

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

@media (min-width: 480px) {
  .skill-cards { grid-template-columns: repeat(3, 1fr); }
}

.skill-card {
  background: var(--bg-card);
  border-radius: var(--r-md);
  padding: 28px 20px;
  text-align: center;
  border: 2px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.skill-icon   { font-size: 2.5rem; margin-bottom: 12px; display: block; }
.skill-name   { font-size: 1.15rem; font-weight: 800; color: var(--forest-xdk); margin-bottom: 8px; }
.skill-desc   { font-size: 0.88rem; color: var(--text-mid); line-height: 1.55; }

/* ===========================
   9. Parents Section
   =========================== */
.sect-parents {
  padding: var(--section-py) var(--px);
  background: var(--bg);
}

.parents-box {
  background: var(--forest-xlt);
  border-radius: var(--r-lg);
  padding: clamp(28px, 5vw, 48px);
  border: 2px solid var(--border);
}

.parents-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 480px) {
  .parents-list { grid-template-columns: repeat(2, 1fr); }
}

.parents-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border-radius: var(--r-sm);
  padding: 14px 18px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--forest-xdk);
  box-shadow: var(--shadow-sm);
}

.parents-check {
  width: 30px;
  height: 30px;
  background: var(--forest);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
  font-size: 1rem;
  font-weight: 900;
}

/* ===========================
   10. Research Log
   =========================== */
.sect-log {
  padding: var(--section-py) var(--px);
  background: var(--bg-tint);
}

.log-entries {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.log-entry {
  background: var(--bg-card);
  border-radius: var(--r-md);
  padding: 20px 24px;
  border-left: 4px solid var(--forest);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.log-date  { font-size: 0.78rem; color: var(--text-lt); font-weight: 600; }
.log-title { font-size: 1rem;    font-weight: 700; color: var(--forest-xdk); }
.log-text  { font-size: 0.9rem;  color: var(--text-mid); }

/* ===========================
   11. About Dark Section
   =========================== */
.sect-about-dark {
  padding: var(--section-py) var(--px);
  text-align: center;
  background: linear-gradient(135deg, var(--forest-xdk) 0%, var(--forest-dk) 100%);
  color: #fff;
}

.sect-about-dark .section-title {
  color: #fff;
}
.sect-about-dark .section-title::after {
  background: rgba(255,255,255,0.45);
}

.about-lead {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: rgba(255,255,255,0.88);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===========================
   12. Footer
   =========================== */
.footer {
  background: var(--forest-xdk);
  color: rgba(255,255,255,0.82);
  padding: clamp(32px, 6vw, 64px) var(--px) clamp(20px, 4vw, 36px);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 32px;
}

@media (min-width: 600px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-logo    { font-size: 1.5rem; font-weight: 900; color: #fff; }
.footer-tagline { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 6px; }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-nav a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.72);
  transition: color 0.15s;
}
.footer-nav a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.14);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

@media (min-width: 600px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-email a { color: var(--forest-lt); font-size: 0.9rem; }
.footer-email a:hover { color: #fff; }
.footer-copy    { font-size: 0.78rem; color: rgba(255,255,255,0.4); }

/* ===========================
   13. Sub-page Hero
   =========================== */
.page-hero {
  background: linear-gradient(135deg, var(--forest-dk) 0%, var(--forest) 100%);
  padding: clamp(48px, 8vw, 80px) var(--px);
  text-align: center;
  color: #fff;
}

.page-hero-title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 12px;
}

.page-hero-desc {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: rgba(255,255,255,0.85);
}

/* ===========================
   14. Games Grid (games page)
   =========================== */
.sect-games {
  padding: var(--section-py) var(--px);
  background: var(--bg);
}

.games-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 560px) {
  .games-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 860px) {
  .games-grid { grid-template-columns: repeat(3, 1fr); }
}

.game-card-full {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: clamp(24px, 4vw, 40px) clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
}
.game-card-full:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.game-card-full.is-coming-soon { opacity: 0.8; }

.badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--accent-lt);
  color: var(--accent-dk);
  border: 2px solid #f5c080;
  border-radius: var(--r-pill);
  padding: 3px 14px;
  font-size: 0.72rem;
  font-weight: 800;
}

/* ===========================
   15. Simple Pages (About / Privacy / Contact)
   =========================== */
.simple-page {
  padding: var(--section-py) var(--px);
  max-width: 720px;
  margin: 0 auto;
}

.simple-page h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 900;
  color: var(--forest-xdk);
  margin-bottom: 12px;
}

.simple-page .lead {
  font-size: 1.05rem;
  color: var(--text-mid);
  padding-bottom: 24px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 32px;
}

.simple-page h2 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--forest-dk);
  margin-top: 36px;
  margin-bottom: 10px;
}

.simple-page p     { color: var(--text-mid); margin-bottom: 14px; }
.simple-page ul    { list-style: disc; padding-left: 24px; color: var(--text-mid); }
.simple-page ul li { margin-bottom: 8px; }

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 32px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--forest-dk);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 2px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px 16px;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: #fff;
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--forest);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.form-note {
  font-size: 0.82rem;
  color: var(--text-lt);
  margin-top: -8px;
}

/* ===========================
   16. Responsive Tweaks
   =========================== */
@media (max-width: 480px) {
  .btn-hero   { height: 62px; font-size: 1.1rem; padding: 0 36px; }
  .btn-play   { height: 58px; font-size: 1.1rem; }
  .game-card-icon { font-size: 3rem; }
}

/* ===========================
   17. Ruby / Furigana
   =========================== */
ruby { ruby-align: center; }

rt {
  font-size: 0.38em;
  letter-spacing: 0.06em;
  font-weight: 600;
}

/* Logo furigana — slightly muted */
.logo rt {
  color: var(--text-lt);
  font-size: 0.42em;
}

/* Hero title furigana — white with opacity */
.hero-title rt {
  color: rgba(255, 255, 255, 0.78);
}

/* English mode: hide furigana entirely */
html[lang="en"] rt { display: none; }

/* ===========================
   18. Entrance Animation
   =========================== */
@media (prefers-reduced-motion: no-preference) {
  .game-card,
  .game-card-full,
  .skill-card,
  .log-entry {
    animation: fade-up 0.45s ease both;
  }
  .game-cards    .game-card:nth-child(2),
  .games-grid .game-card-full:nth-child(2) { animation-delay: 0.08s; }
  .games-grid .game-card-full:nth-child(3) { animation-delay: 0.16s; }
  .skill-cards   .skill-card:nth-child(2)  { animation-delay: 0.08s; }
  .skill-cards   .skill-card:nth-child(3)  { animation-delay: 0.16s; }
  .log-entries   .log-entry:nth-child(2)   { animation-delay: 0.08s; }
  .log-entries   .log-entry:nth-child(3)   { animation-delay: 0.16s; }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}