/* ================================================================
   Kisaki Official Website — Styles
   ================================================================ */

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

:root {
  --pink-50: #fdf2f8;
  --pink-100: #fce7f3;
  --pink-200: #fbcfe8;
  --pink-300: #f9a8d4;
  --pink-400: #f472b6;
  --pink-500: #ec4899;
  --pink-600: #db2777;
  --pink-700: #be185d;
  --pink-800: #9d174d;
  --pink-900: #831843;

  --purple-400: #c084fc;
  --purple-500: #a855f7;
  --purple-600: #9333ea;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gray-950: #030712;

  --white: #ffffff;

  --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.18);
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-sans);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-md);
  font-weight: 600; font-size: .95rem;
  transition: all var(--transition);
  cursor: pointer; border: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--pink-500), var(--purple-500));
  color: var(--white);
  box-shadow: 0 4px 16px rgba(236,72,153,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(236,72,153,.45);
}
.btn-outline {
  background: transparent;
  color: var(--gray-700);
  border: 1.5px solid var(--gray-300);
}
.btn-outline:hover {
  border-color: var(--pink-400);
  color: var(--pink-600);
  background: var(--pink-50);
}
.btn-sm { padding: 8px 18px; font-size: .85rem; }
.btn-dl { width: 100%; justify-content: center; }

/* --- Navigation --- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,.06);
  transition: all var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow-md); }
.nav-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; height: 64px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.25rem;
}
.nav-links {
  display: flex; gap: 4px;
}
.nav-links a {
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: .9rem; font-weight: 500; color: var(--gray-600);
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--pink-600); background: var(--pink-50); }
.nav-cta {
  background: var(--white);
  color: #8BC5E3 !important;
  padding: 8px 20px !important; border-radius: var(--radius-md);
  font-weight: 600 !important; font-size: .9rem !important;
  border: 2px solid #8BC5E3;
  transition: all var(--transition);
}
.nav-cta:hover { background: #8BC5E3; color: var(--white) !important; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--gray-800); border-radius: 2px; transition: all var(--transition); }

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--gray-200); padding: 16px 32px; gap: 4px; box-shadow: var(--shadow-lg); }
  .nav-links.open + .nav-cta { display: none; }
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 80px 80px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--pink-50) 0%, var(--white) 100%);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .45;
}
.orb-1 {
  width: 500px; height: 500px;
  background: var(--pink-300);
  top: -150px; right: -100px;
}
.orb-2 {
  width: 400px; height: 400px;
  background: var(--purple-400);
  bottom: -100px; left: -100px; opacity: .3;
}
.orb-3 {
  width: 300px; height: 300px;
  background: var(--pink-400);
  top: 50%; left: 50%; transform: translate(-50%, -50%); opacity: .2;
}
.hero-content { flex: 1; max-width: 700px; position: relative; z-index: 1; padding-left: 120px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 100px;
  background: var(--white); border: 1px solid var(--gray-200);
  font-size: .85rem; font-weight: 500; color: var(--gray-600);
  margin-bottom: 24px;
}
.badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #22c55e; animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }

.hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900; line-height: 1.15;
  letter-spacing: -.02em; margin-bottom: 24px;
  white-space: nowrap;
}
.gradient-text {
  background: linear-gradient(135deg, var(--pink-500), var(--purple-500));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem; color: var(--gray-600); line-height: 1.75;
  margin-bottom: 36px; max-width: 520px;
}
.hero-actions { display: flex; gap: 12px; margin-bottom: 32px; flex-wrap: wrap; }
.hero-platforms { display: flex; gap: 12px; flex-wrap: wrap; }
.platform-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 100px;
  background: var(--gray-100); font-size: .8rem; font-weight: 500; color: var(--gray-600);
}

/* Hero Visual */
.hero-visual { flex: 1; display: flex; justify-content: center; align-items: center; position: relative; z-index: 1; }
.hero-mockup {
  width: 520px; max-width: 90vw;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}
.mockup-window { }
.mockup-dots {
  display: flex; gap: 6px; padding: 14px 18px;
  background: var(--gray-50); border-bottom: 1px solid var(--gray-100);
}
.mockup-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--gray-300);
}
.mockup-dots span:nth-child(1) { background: #f87171; }
.mockup-dots span:nth-child(2) { background: #fbbf24; }
.mockup-dots span:nth-child(3) { background: #34d399; }
.mockup-body {
  display: flex; flex-direction: column; align-items: center;
  padding: 16px 12px;
  min-height: 400px;
  background: linear-gradient(180deg, rgba(244,114,182,.06) 0%, rgba(168,85,247,.04) 100%);
}
.nav-logo-img { width: 32px; height: 32px; object-fit: contain; }
.nav-logo-text { height: 28px; width: auto; object-fit: contain; }
.footer-logo-img { width: 28px; height: 28px; object-fit: contain; }
.footer-logo-text { height: 24px; width: auto; object-fit: contain; }
.hero-images {
  display: flex; align-items: center; justify-content: center;
}
.hero-img-main {
  width: 100%; max-width: 100%; height: auto; max-height: 500px;
  object-fit: contain;
  display: block;
}
.mockup-bubble {
  background: var(--white);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 4px;
  padding: 16px 20px;
  box-shadow: var(--shadow-md);
  position: relative;
  max-width: 280px;
}
.mockup-bubble p { font-size: .9rem; color: var(--gray-700); line-height: 1.5; }

@media (max-width: 1024px) {
  .hero { flex-direction: column; text-align: center; padding: 100px 32px 60px; }
  .hero-content { max-width: 100%; }
  .hero-desc { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-platforms { justify-content: center; }
  .hero-visual { margin-top: 48px; }
}

/* --- Section Shared --- */
.section-header {
  text-align: center; max-width: 640px; margin: 0 auto 56px;
}
.section-tag {
  display: inline-block; padding: 4px 14px; border-radius: 100px;
  background: var(--pink-100); color: var(--pink-700);
  font-size: .8rem; font-weight: 600; margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800; letter-spacing: -.01em;
  margin-bottom: 12px;
}
.section-header p { color: var(--gray-600); font-size: 1.05rem; }

/* --- Features --- */
.features {
  padding: 100px 32px;
  max-width: 1280px; margin: 0 auto;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.feature-card {
  padding: 32px; border-radius: var(--radius-lg);
  background: var(--white); border: 1px solid var(--gray-100);
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--pink-200);
}
.feature-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--pink-100), var(--pink-50));
  color: var(--pink-600);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--gray-600); font-size: .93rem; line-height: 1.7; }

/* --- Characters --- */
.characters {
  padding: 100px 32px;
  background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
}
.characters-grid {
  max-width: 1280px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.character-card {
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  overflow: hidden;
  transition: all var(--transition);
}
.character-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--pink-200);
}
.character-card-image {
  height: 240px;
  background: linear-gradient(180deg, rgba(244,114,182,.08) 0%, rgba(168,85,247,.06) 100%);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.character-card-img {
  width: auto; height: 90%; max-width: 90%;
  object-fit: contain;
}
.character-card-body { padding: 20px 24px 24px; }
.character-card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 4px; }
.character-card-id {
  font-size: .8rem; color: var(--gray-400); font-family: monospace;
  margin-bottom: 8px;
}
.character-card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.character-tag {
  padding: 3px 10px; border-radius: 100px;
  background: var(--pink-50); color: var(--pink-600);
  font-size: .75rem; font-weight: 500;
}
.character-tag.lang {
  background: var(--purple-400 / .15);
  background: #f3e8ff; color: #7c3aed;
}
.characters-cta {
  text-align: center; margin-top: 48px;
  color: var(--gray-600); font-size: .95rem;
}
.characters-cta a { color: var(--pink-600); font-weight: 600; text-decoration: underline; }

/* --- Tech Stack --- */
.tech-stack {
  padding: 100px 32px;
  max-width: 1280px; margin: 0 auto;
}
.tech-grid {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 32px;
}
.tech-item {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 24px; min-width: 120px;
}
.tech-icon-wrapper {
  width: 72px; height: 72px; border-radius: var(--radius-lg);
  background: var(--gray-50); border: 1px solid var(--gray-100);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 4px;
  transition: all var(--transition);
}
.tech-item:hover .tech-icon-wrapper {
  transform: scale(1.08);
  box-shadow: var(--shadow-md);
}
.tech-item strong { font-size: .95rem; font-weight: 700; }
.tech-item span { font-size: .8rem; color: var(--gray-500); }

/* --- Download --- */
.download {
  padding: 100px 32px;
  background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}
.download-grid {
  max-width: 1100px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.download-card {
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200); padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}
.download-card:hover {
  border-color: var(--pink-300);
  box-shadow: var(--shadow-lg);
}
.download-card-icon { margin-bottom: 16px; display: flex; justify-content: center; align-items: center; }
.download-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 4px; }
.download-card-ver { font-size: .85rem; color: var(--gray-500); margin-bottom: 4px; }
.download-card-desc { font-size: .85rem; color: var(--gray-400); margin-bottom: 24px; }
.download-card-note {
  display: block; margin-top: 12px;
  font-size: .78rem; color: var(--gray-400);
}
.download-packs { margin-top: 80px; }
.packs-grid {
  max-width: 900px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.pack-card {
  background: var(--white); border-radius: var(--radius-lg);
  border: 2px dashed var(--gray-200); padding: 28px;
  transition: all var(--transition);
}
.pack-card:hover { border-color: var(--pink-300); border-style: solid; }
.pack-card-header {
  display: flex; align-items: center; gap: 16px; margin-bottom: 12px;
}
.pack-card-header h3 { font-size: 1.05rem; font-weight: 700; }
.pack-card-header span { font-size: .8rem; color: var(--gray-500); }
.pack-card p { color: var(--gray-600); font-size: .9rem; line-height: 1.6; margin-bottom: 20px; }

/* --- Guide --- */
.guide {
  padding: 100px 32px;
  max-width: 900px; margin: 0 auto;
}
.guide-steps { display: flex; flex-direction: column; gap: 40px; }
.guide-step {
  display: flex; gap: 28px;
  padding: 32px; border-radius: var(--radius-lg);
  background: var(--white); border: 1px solid var(--gray-100);
  transition: all var(--transition);
}
.guide-step:hover { border-color: var(--pink-200); box-shadow: var(--shadow-sm); }
.step-number {
  font-size: 2rem; font-weight: 900;
  background: linear-gradient(135deg, var(--pink-500), var(--purple-500));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1; flex-shrink: 0; min-width: 48px;
}
.step-content h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.step-content p { color: var(--gray-600); font-size: .93rem; line-height: 1.7; margin-bottom: 12px; }
.step-code {
  background: var(--gray-900); border-radius: var(--radius-md);
  padding: 16px 20px; overflow-x: auto; margin-top: 8px;
}
.step-code code {
  color: #e2e8f0; font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: .82rem; line-height: 1.7; white-space: pre;
}
.step-table {
  margin-top: 12px; border-radius: var(--radius-sm);
  overflow: hidden; border: 1px solid var(--gray-200);
}
.step-table table { width: 100%; border-collapse: collapse; }
.step-table td {
  padding: 10px 16px; font-size: .88rem;
  border-bottom: 1px solid var(--gray-100);
}
.step-table td:first-child {
  font-weight: 600; color: var(--gray-700); width: 120px;
  background: var(--gray-50);
}
.step-table td:last-child { color: var(--gray-600); }
.step-table tr:last-child td { border-bottom: none; }

.guide-extra {
  margin-top: 64px; padding: 36px;
  background: var(--pink-50); border-radius: var(--radius-lg);
  border: 1px solid var(--pink-100);
}
.guide-extra h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.guide-extra p { color: var(--gray-600); font-size: .93rem; line-height: 1.7; margin-bottom: 12px; }
.guide-extra p code {
  background: var(--white); padding: 2px 8px; border-radius: 4px;
  font-size: .85rem; color: var(--pink-700); font-family: 'SF Mono', monospace;
}

@media (max-width: 640px) {
  .guide-step { flex-direction: column; gap: 12px; }
}

/* --- Footer --- */
.footer {
  background: var(--gray-900); color: var(--gray-300);
  padding: 64px 32px 32px;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; justify-content: space-between; gap: 48px;
  flex-wrap: wrap;
}
.footer-brand { max-width: 300px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-logo span { font-weight: 800; font-size: 1.2rem; color: var(--white); }
.footer-brand p { font-size: .9rem; line-height: 1.7; }
.footer-links { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-col h4 { color: var(--white); font-size: .9rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a {
  display: block; font-size: .85rem; padding: 4px 0;
  color: var(--gray-400); transition: color var(--transition);
}
.footer-col a:hover { color: var(--pink-400); }
.footer-bottom {
  max-width: 1280px; margin: 48px auto 0;
  padding-top: 24px; border-top: 1px solid var(--gray-800);
  text-align: center; font-size: .82rem; color: var(--gray-500);
}
.footer-bottom a { color: var(--gray-400); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--pink-400); }

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* --- Responsive --- */
@media (max-width: 640px) {
  .features-grid { grid-template-columns: 1fr; }
  .characters-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .packs-grid { grid-template-columns: 1fr; }
  .footer-links { gap: 32px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}