:root {
  --bg:#0d0d0f;
  --bg-alt:#16171c;
  --text:#e5e7eb;
  --text-dim:#8b9099;
  --accent:#5d89ff;
  --accent-grad:linear-gradient(100deg,#4f46e5,#6366f1,#3b82f6 70%);
  --surface:#1f2024;
  --border:#2a2c33;
  --radius-xs:4px;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-pill:999px;
  --ease:smoothstep(.4,.0,.2,1);
  --shadow-elev:0 4px 12px -4px rgba(0,0,0,.4),0 0 0 1px rgba(255,255,255,.03);
  --font-sans:'Noto Sans JP', 'Rajdhani', system-ui, sans-serif;
  --font-display:'Rajdhani','Noto Sans JP',system-ui,sans-serif;
}

html {scroll-behavior:smooth;}
body {font-family:var(--font-sans);background:var(--bg);color:var(--text);-webkit-text-size-adjust:100%;line-height:1.6;}

/* Layout */
.site-header {position:fixed;top:0;left:0;width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 48px;z-index:60;background:rgba(13,13,15,.6);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.06);transition:background .4s ease,backdrop-filter .4s ease;padding-block:18px;}
.site-header[data-scrolled="true"] {background:rgba(13,13,15,.9);}
.logo {font-family:var(--font-display);font-size:28px;letter-spacing:.06em;font-weight:800;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.nav__toggle {display:none;background:var(--surface);color:var(--text);border:1px solid var(--border);padding:10px 16px;border-radius:var(--radius-md);font-weight:700;cursor:pointer;}
/* hamburger icon */
.hamburger {display:inline-block;width:22px;height:18px;position:relative}
.hamburger span {display:block;position:absolute;height:2px;background:var(--text);left:0;right:0;border-radius:2px;}
.hamburger span:nth-child(1){top:0}
.hamburger span:nth-child(2){top:8px}
.hamburger span:nth-child(3){bottom:0}
.nav__toggle[aria-expanded="true"] .hamburger span:nth-child(2){opacity:0}
.nav__toggle[aria-expanded="true"] .hamburger span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] .hamburger span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* screen-reader only helper if needed */
.sr-only {position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.nav__menu {display:flex;gap:36px;align-items:center;}
.nav__menu a {text-decoration:none;color:var(--text-dim);font-weight:600;position:relative;letter-spacing:.06em;font-size:16px;padding:6px 8px;border-radius:8px;}
.nav__menu a:after {content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--accent-grad);transition:.35s cubic-bezier(.4,.14,.3,1);border-radius:2px;}
.nav__menu a:hover,.nav__menu a:focus-visible {color:var(--text);}
.nav__menu a:hover:after,.nav__menu a:focus-visible:after {width:100%;}

.hero {position:relative;min-height:100dvh;padding:0 40px;display:flex;align-items:center;justify-content:flex-start;}
.hero__bg {position:absolute;inset:0;width:100%;height:100%;background:#000;}
.hero__inner {position:relative;z-index:2;max-width:840px;}
/* Typing animation */
.hero__animated {display:inline-block;white-space:nowrap;overflow:visible;}
.typed-caret {display:inline-block;color:var(--accent);margin-left:6px;opacity:1;animation:blinkCaret 1s steps(1,end) infinite;}
@keyframes blinkCaret {50% {opacity:0}}
.typed-caret {transition:opacity .25s ease}

.hero__animated .accent {display:inline-block;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}

.is-hidden {opacity:0;transform:translateY(12px);transition:opacity .6s cubic-bezier(.2,.9,.2,1),transform .6s cubic-bezier(.2,.9,.2,1)}
.is-visible {opacity:1;transform:translateY(0)}

.hero__title {font-family:var(--font-display);font-size:clamp(48px,8vw,110px);line-height:1.05;font-weight:700;letter-spacing:.02em;margin-bottom:28px;}
.hero__title .accent {background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 6px 18px rgba(80,120,255,.35));}
.hero__lead {font-size:18px;color:var(--text-dim);max-width:540px;}
.hero__cta {margin-top:42px;display:flex;gap:20px;flex-wrap:wrap;}
.scroll-indicator {position:absolute;left:50%;bottom:24px;transform:translateX(-50%);font-size:12px;letter-spacing:.35em;color:var(--text-dim);animation:scrollFade 3.2s ease-in-out infinite;}
@keyframes scrollFade {0%,100% {opacity:0;transform:translate(-50%,8px);} 15%,60% {opacity:.75;transform:translate(-50%,0);} }

.section {padding:120px 40px 40px;position:relative;}
.section__head {max-width:1100px;margin:0 auto 54px;display:flex;flex-direction:column;gap:10px;}
.section__title {font-family:var(--font-display);font-size:40px;letter-spacing:.04em;position:relative;display:inline-flex;align-items:center;}
.section__title:before {content:"";display:inline-block;width:8px;height:34px;margin-right:14px;background:var(--accent-grad);border-radius:4px;}
.section__desc {color:var(--text-dim);font-size:14px;letter-spacing:.08em;text-transform:uppercase;}

/* Games */
.games__grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:38px;max-width:1400px;margin:0 auto;}
.game-card {position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px 14px 18px;display:flex;flex-direction:column;gap:14px;overflow:hidden;isolation:isolate;box-shadow:var(--shadow-elev);}
.game-card:before {content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 30%,rgba(90,120,255,.15),transparent 65%);opacity:0;transition:.6s;}
.game-card:hover:before {opacity:1;}
.game-card__thumb {aspect-ratio:16/9;border-radius:var(--radius-sm);background:#111 center/cover no-repeat;position:relative;overflow:hidden;}
.game-card__tags {display:flex;flex-wrap:wrap;gap:6px;}
.tag {background:rgba(99,102,241,.15);color:#8da6ff;padding:4px 10px;font-size:11px;border-radius:var(--radius-pill);letter-spacing:.05em;}
.game-card__title {font-size:18px;font-weight:600;letter-spacing:.02em;}
.game-card__meta {font-size:12px;color:var(--text-dim);display:flex;gap:12px;align-items:center;}
.game-card__desc {font-size:13px;color:var(--text-dim);line-height:1.5;flex:1;}
.game-card__links {display:flex;gap:12px;margin-top:4px;}

/* About */
.about__body {max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:26px;font-size:15px;}
.about__values {display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;font-size:13px;color:var(--text-dim);}

/* DevLog */
.devlog__list {max-width:1100px;margin:0 auto;display:grid;gap:26px;}
.devlog-item {padding:20px 24px;border:1px solid var(--border);background:var(--surface);border-radius:var(--radius-md);display:grid;gap:10px;position:relative;overflow:hidden;}
.devlog-item:after {content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(80,110,255,.12),transparent 60%);mix-blend-mode:overlay;opacity:0;transition:.5s;}
.devlog-item:hover:after {opacity:1;}
.devlog-item__title {font-size:20px;font-weight:600;letter-spacing:.02em;}
.devlog-item__meta {font-size:12px;color:var(--text-dim);display:flex;gap:14px;}
.devlog-item__body {font-size:14px;color:var(--text-dim);line-height:1.6;}
.devlog__more {margin-top:34px;text-align:center;}

/* Contact */
.contact__form {max-width:760px;margin:0 auto;display:grid;gap:26px;}
.form__row {display:flex;flex-direction:column;gap:8px;}
.form__row label {font-size:13px;letter-spacing:.06em;color:var(--text-dim);text-transform:uppercase;}
.form__row input,.form__row select,.form__row textarea {background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;font:inherit;color:var(--text);resize:vertical;}
.form__row input:focus,.form__row select:focus,.form__row textarea:focus {border-color:#4f6dff;}
.form__error {color:#ff6d6d;font-size:12px;min-height:1em;}
.form__actions {display:flex;align-items:center;gap:20px;}
#formStatus {font-size:13px;color:var(--text-dim);}

/* Buttons */
.btn {--btn-bg:var(--surface);--btn-bd:var(--border);--btn-color:var(--text);display:inline-flex;align-items:center;justify-content:center;padding:14px 30px;font-size:14px;font-weight:600;letter-spacing:.06em;text-decoration:none;border-radius:var(--radius-pill);border:1px solid var(--btn-bd);background:var(--btn-bg);color:var(--btn-color);position:relative;overflow:hidden;cursor:pointer;transition:.4s cubic-bezier(.5,.2,.2,1);}
.btn:before {content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(255,255,255,.08),transparent 70%);opacity:0;transition:.5s;}
.btn:hover:before {opacity:1;}
.btn.-primary {--btn-bg:var(--accent-grad);--btn-bd:rgba(255,255,255,.08);--btn-color:#fff;box-shadow:0 8px 28px -8px rgba(70,100,255,.5);}
.btn.-ghost {--btn-bg:rgba(255,255,255,.04);--btn-bd:rgba(255,255,255,.08);}
.btn.-small {padding:10px 20px;font-size:12px;}

/* Footer */
.site-footer {padding:48px 40px;margin-top:140px;border-top:1px solid var(--border);display:flex;flex-direction:column;align-items:center;gap:12px;font-size:13px;color:var(--text-dim);background:linear-gradient(180deg,rgba(10,12,15,0),#07070a 70%);}
.site-footer .footer__inner {max-width:1100px;width:100%;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:12px 0}
.footer__brand {font-weight:700;color:var(--text);}
.footer__social {display:flex;gap:18px;align-items:center;margin-left:auto}
.footer__social a {color:var(--text-dim);text-decoration:none;font-size:13px;letter-spacing:.08em;padding:8px 10px;border-radius:8px;background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.02)}
.footer__social a:hover {color:var(--text);background:rgba(255,255,255,0.03)}

/* Util */
[data-animate] {opacity:0;transform:translateY(18px);transition:1s cubic-bezier(.5,.2,.1,1);}
[data-animate].in {opacity:1;transform:translateY(0);}

/* Responsive */
@media (max-width:960px) {
  .nav__toggle {display:inline-flex;}
  .nav__menu {position:absolute;top:100%;right:0;flex-direction:column;background:rgba(15,15,18,.95);padding:24px 34px;border:1px solid var(--border);border-radius:var(--radius-md);backdrop-filter:blur(14px);transform-origin:top right;transform:scale(.9) translateY(-6px);opacity:0;pointer-events:none;transition:.45s cubic-bezier(.4,.14,.3,1);}
  .nav__menu.open {opacity:1;transform:scale(1) translateY(0);pointer-events:auto;}
  .hero {padding:0 28px;}
  .section {padding:110px 28px 40px;}
  .games__grid {gap:30px;}
  .game-card {padding:14px 16px 20px;}
}

@media (max-width:560px) {
  .hero__title {font-size:clamp(42px,11vw,70px);}
  .hero__lead {font-size:16px;}
  .section__title {font-size:34px;}
}