/* ============================================================
   Sunnyside — Branding & Creative Agency
   Sunny yellow + black + white. Rounded, friendly, bright.
   Theme-aware: [data-theme="light"] (default) + [data-theme="dark"]
   ============================================================ */

:root {
  --yellow:      #FFC400;
  --yellow-deep: #F0A500;
  --yellow-soft: #FFE9A8;

  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;

  --font-display: 'Quicksand', ui-rounded, system-ui, sans-serif;
  --font-body: 'Mulish', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- LIGHT (default) ---------- */
:root, [data-theme="light"] {
  --bg:        #ffffff;
  --bg-tint:   #fbf7ef;          /* warm cream */
  --surface:   #ffffff;
  --ink:       #1b1b1a;          /* near-black text */
  --ink-soft:  #5d5b55;
  --heading:   #141413;
  --border:    rgba(20,20,19,.12);
  --border-soft: rgba(20,20,19,.07);
  --tile-bg:   #ffffff;
  --tile-border: rgba(20,20,19,.08);
  --accent-ink: #141413;         /* text that sits on yellow */
  --jp:        #b9b3a5;
  --nav-bg:        rgba(255,255,255,.72);
  --nav-bg-solid:  rgba(255,255,255,.93);
  --shadow:    0 18px 50px -22px rgba(20,20,19,.30);
  --shadow-sm: 0 6px 22px -12px rgba(20,20,19,.22);
  --blob-op:   .5;
}

/* ---------- DARK ---------- */
[data-theme="dark"] {
  --bg:        #17150f;          /* warm charcoal */
  --bg-tint:   #1f1c14;
  --surface:   #211e16;
  --ink:       #f1ece0;
  --ink-soft:  #b3ab98;
  --heading:   #fffdf6;
  --border:    rgba(255,255,255,.12);
  --border-soft: rgba(255,255,255,.07);
  --tile-bg:   #ffffff;          /* keep logo tiles light */
  --tile-border: rgba(255,255,255,.12);
  --accent-ink: #141413;
  --jp:        #6f6857;
  --nav-bg:        rgba(23,21,15,.6);
  --nav-bg-solid:  rgba(23,21,15,.9);
  --shadow:    0 22px 60px -22px rgba(0,0,0,.6);
  --shadow-sm: 0 8px 26px -14px rgba(0,0,0,.5);
  --blob-op:   .28;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background .4s var(--ease), color .4s var(--ease);
}
:lang(ja) { font-family: var(--font-jp), var(--font-body); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, 92vw); margin: 0 auto; }

h1,h2,h3 { font-family: var(--font-display); color: var(--heading); }

/* ---------- Decorative blobs ---------- */
.blobs { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.blob { position: absolute; border-radius: 50%; filter: blur(90px); opacity: var(--blob-op); transition: opacity .4s var(--ease); }
.blob-1 { width: 520px; height: 520px; background: radial-gradient(circle, var(--yellow) 0%, transparent 65%); top: -160px; right: -120px; animation: drift 20s ease-in-out infinite; }
.blob-2 { width: 460px; height: 460px; background: radial-gradient(circle, var(--yellow-soft) 0%, transparent 65%); bottom: -180px; left: -120px; animation: drift 26s ease-in-out infinite reverse; }
@keyframes drift { 0%,100%{transform:translate(0,0) scale(1);} 50%{transform:translate(40px,-30px) scale(1.1);} }

/* ---------- Nav ---------- */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 50; padding: 16px 0; background: var(--nav-bg); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border-soft); transition: padding .3s var(--ease), background .3s var(--ease); }
.nav.scrolled { padding: 10px 0; background: var(--nav-bg-solid); }
.nav-inner { width: min(1180px, 92vw); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: inline-flex; align-items: center; }
.brand-logo { height: 30px; width: auto; display: block; }
[data-theme="dark"] .brand-logo,
[data-theme="dark"] .footer-logo { filter: invert(1); }
.nav-links { display: flex; align-items: center; gap: 24px; font-weight: 600; font-size: .95rem; }
.nav-links > a:not(.btn) { position: relative; padding: 4px 0; color: var(--ink); }
.nav-links > a:not(.btn)::after { content:''; position:absolute; left:0; right:100%; bottom:-2px; height:3px; border-radius:3px; background: var(--yellow); transition: right .3s var(--ease); }
.nav-links > a:not(.btn):hover::after { right: 0; }
.nav-controls { display: inline-flex; align-items: center; gap: 12px; }

.lang-switch { display: inline-flex; border: 1px solid var(--border); border-radius: var(--radius-pill); overflow: hidden; }
.lang-switch button { appearance: none; background: transparent; border: 0; color: var(--ink-soft); font: inherit; font-weight: 700; font-size: .76rem; letter-spacing: .03em; padding: 6px 10px; cursor: pointer; transition: background .2s, color .2s; }
.lang-switch button.active { background: var(--yellow); color: var(--accent-ink); }
.lang-switch button:not(.active):hover { color: var(--heading); }

.theme-toggle { position: relative; width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--border); background: transparent; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; transition: border-color .2s, background .2s; }
.theme-toggle:hover { border-color: var(--yellow-deep); background: var(--bg-tint); }
.theme-sun, .theme-moon { position: absolute; width: 18px; height: 18px; transition: opacity .3s var(--ease), transform .3s var(--ease); }
.theme-sun { border-radius: 50%; background: radial-gradient(circle, var(--yellow) 40%, transparent 42%); box-shadow: 0 -11px 0 -8px var(--yellow-deep),0 11px 0 -8px var(--yellow-deep),-11px 0 0 -8px var(--yellow-deep),11px 0 0 -8px var(--yellow-deep),8px 8px 0 -8px var(--yellow-deep),-8px -8px 0 -8px var(--yellow-deep),8px -8px 0 -8px var(--yellow-deep),-8px 8px 0 -8px var(--yellow-deep); }
.theme-moon { border-radius: 50%; box-shadow: inset -6px -2px 0 0 var(--ink); transform: rotate(-20deg); }
[data-theme="light"] .theme-sun { opacity: 0; transform: scale(.4) rotate(-40deg); }
[data-theme="light"] .theme-moon { opacity: 1; }
[data-theme="dark"] .theme-sun { opacity: 1; }
[data-theme="dark"] .theme-moon { opacity: 0; transform: scale(.4) rotate(40deg); }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: var(--radius-pill); font-family: var(--font-display); font-weight: 700; font-size: .95rem; cursor: pointer; border: 2px solid transparent; transition: transform .2s var(--ease), background .2s, border-color .2s, color .2s; }
.btn-primary { background: var(--yellow); color: var(--accent-ink); box-shadow: 0 10px 26px -10px rgba(240,165,0,.6); }
.btn-primary:hover { transform: translateY(-2px); background: var(--yellow-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }

.mobile-toggle { display: none; background: transparent; border: 0; padding: 8px; cursor: pointer; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: transform .25s var(--ease), opacity .25s var(--ease); }
.mobile-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Kicker + JP accent ---------- */
.kicker { display: inline-flex; align-items: center; gap: 12px; text-transform: uppercase; letter-spacing: .18em; font-family: var(--font-display); font-weight: 700; font-size: .82rem; color: var(--yellow-deep); margin: 0 0 18px; }
.accent-jp { font-family: var(--font-jp); font-weight: 500; letter-spacing: .15em; font-size: .8rem; color: var(--jp); text-transform: none; }
:lang(ja) .accent-jp { display: none; }   /* avoid JP-on-JP redundancy */

/* ---------- Hero ---------- */
.hero { position: relative; z-index: 1; min-height: 100vh; display: flex; align-items: center; padding: 150px 0 90px; }
.hero .hero-inner { width: min(1180px, 92vw); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 56px; }
.hero-text { max-width: 660px; min-width: 0; }
.hero-title { font-size: clamp(2.4rem, 6vw, 5rem); line-height: 1.05; letter-spacing: -.02em; font-weight: 700; margin: 0 0 26px; }
.hero-title .hl { position: relative; white-space: nowrap; }
.hero-title .hl::after { content: ''; position: absolute; left: -2px; right: -2px; bottom: .08em; height: .34em; background: var(--yellow); z-index: -1; border-radius: 4px; transform: rotate(-1deg); }
.hero-copy { max-width: 620px; font-size: clamp(1.05rem, 1.4vw, 1.25rem); color: var(--ink-soft); margin: 0 0 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-chips { display: flex; gap: 10px; margin-top: 40px; }
.chip { font-family: var(--font-display); font-weight: 700; font-size: .85rem; padding: 7px 16px; border-radius: var(--radius-pill); background: var(--bg-tint); border: 1px solid var(--border); color: var(--ink); }
.hero-egg { width: clamp(210px, 24vw, 320px); animation: bob 6s ease-in-out infinite; }
.hero-egg img { width: 100%; height: auto; display: block; }
.hero-egg .egg-dark { display: none; }
[data-theme="dark"] .hero-egg .egg-light { display: none; }
[data-theme="dark"] .hero-egg .egg-dark { display: block; }
@keyframes bob { 0%,100%{transform:translateY(0);} 50%{transform:translateY(-12px);} }
@media (max-width: 980px) {
  .hero .hero-inner { grid-template-columns: 1fr; }
  .hero-egg { display: none; }
}

/* ---------- Sections ---------- */
.section { position: relative; z-index: 1; padding: 100px 0; }
.section-tint { background: var(--bg-tint); }
.section-head { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.section-head .kicker { justify-content: center; }
.section-title { font-size: clamp(1.8rem, 3.6vw, 2.9rem); line-height: 1.12; letter-spacing: -.01em; font-weight: 700; margin: 8px 0 0; }
.section-text { font-size: 1.06rem; color: var(--ink-soft); }
.section-text.center { margin: 16px auto 0; max-width: 640px; }

/* ---------- About / Vision-Mission ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 8px; }
.vm-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 36px; box-shadow: var(--shadow-sm); transition: transform .3s var(--ease); }
.vm-card:hover { transform: translateY(-4px); }
.vm-tag { display: inline-block; font-family: var(--font-display); font-weight: 700; font-size: .95rem; padding: 6px 18px; border-radius: var(--radius-pill); background: var(--yellow); color: var(--accent-ink); margin-bottom: 18px; }
.vm-card p { margin: 0; font-size: 1.05rem; color: var(--ink); }

/* ---------- Services ---------- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px 40px; }
.services-grid ul { list-style: none; margin: 0; padding: 0; }
.services-grid li { padding: 13px 0; border-bottom: 1px solid var(--border-soft); font-weight: 600; color: var(--ink); display: flex; align-items: center; gap: 10px; transition: color .2s, padding .2s; }
.services-grid li::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--yellow); flex: none; transition: transform .2s; }
.services-grid li:hover { color: var(--yellow-deep); padding-left: 4px; }
.services-grid li:hover::before { transform: scale(1.5); }
.services-note { text-align: center; margin: 40px 0 0; font-family: var(--font-display); font-weight: 600; color: var(--ink-soft); }

/* ---------- Philosophy ---------- */
.philo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.philo-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 30px 26px; transition: transform .3s var(--ease), border-color .3s; }
.philo-card:hover { transform: translateY(-6px); border-color: var(--yellow); }
.philo-num { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; color: var(--yellow-deep); }
.philo-card h3 { font-size: 1.25rem; margin: 14px 0 8px; }
.philo-card p { margin: 0; color: var(--ink-soft); font-size: .96rem; }

/* ---------- Work ---------- */
.work-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.work-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px 24px; transition: transform .3s var(--ease), box-shadow .3s; position: relative; overflow: hidden; }
.work-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--yellow); transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease); }
.work-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.work-card:hover::before { transform: scaleX(1); }
.work-cat { font-family: var(--font-display); font-weight: 700; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--yellow-deep); }
.work-card h3 { font-size: 1.5rem; margin: 10px 0 10px; }
.work-card p { margin: 0; font-size: .95rem; color: var(--ink-soft); }

/* ---------- Why ---------- */
.why-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; align-items: center; }

/* ---------- Clients ---------- */
.client-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.client-grid li { display: flex; align-items: center; justify-content: center; height: 120px; padding: 20px; background: var(--tile-bg); border: 1px solid var(--tile-border); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); transition: transform .28s var(--ease), box-shadow .28s; }
.client-grid li:hover { transform: translateY(-5px) rotate(-1deg); box-shadow: var(--shadow); }
.client-grid img { max-width: 100%; max-height: 74px; width: auto; object-fit: contain; }

/* ---------- Contact ---------- */
.contact-title { font-family: var(--font-display); font-weight: 700; font-size: clamp(2rem, 5vw, 3.4rem); margin: 8px 0 0; }
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 8px; }
.contact-card { display: flex; flex-direction: column; gap: 6px; padding: 26px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); transition: transform .25s var(--ease), border-color .25s, background .25s; }
.contact-card:hover { transform: translateY(-5px); border-color: var(--yellow); background: var(--yellow); }
.contact-card:hover .contact-label, .contact-card:hover .contact-value { color: var(--accent-ink); }
.contact-label { font-family: var(--font-display); font-weight: 700; font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--yellow-deep); }
.contact-value { font-weight: 600; color: var(--heading); word-break: break-word; }

/* ---------- Footer ---------- */
.footer { position: relative; z-index: 1; padding: 36px 0; border-top: 1px solid var(--border-soft); background: var(--bg-tint); font-size: .9rem; color: var(--ink-soft); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.footer-logo { height: 28px; width: auto; }
.footer-brand small { color: var(--ink-soft); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease) var(--delay,0s), transform .7s var(--ease) var(--delay,0s); }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .about-grid, .why-grid { grid-template-columns: 1fr; gap: 24px; }
  .services-grid { grid-template-columns: 1fr 1fr; gap: 8px 30px; }
  .philo-grid, .work-grid { grid-template-columns: repeat(2, 1fr); }
  .client-grid { grid-template-columns: repeat(4, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 76px 0; }
}
@media (max-width: 620px) {
  .mobile-toggle { display: block; }
  .nav-links { position: fixed; inset: 60px 0 auto 0; flex-direction: column; background: var(--nav-bg-solid); backdrop-filter: blur(16px); padding: 22px 26px 30px; align-items: stretch; gap: 16px; transform: translateY(-120%); transition: transform .35s var(--ease); border-bottom: 1px solid var(--border-soft); }
  .nav-links.open { transform: translateY(0); }
  .nav-controls { justify-content: space-between; }
  .services-grid { grid-template-columns: 1fr; }
  .philo-grid, .work-grid, .contact-grid { grid-template-columns: 1fr; }
  .client-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}