/* ============================================================
   kawamori.jp — Modern tech portfolio
   ============================================================ */
:root {
  --bg: #070b14;
  --bg-soft: #0d1322;
  --surface: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.09);
  --text: #e8ecf4;
  --text-dim: #9aa5b8;
  --accent: #4f8cff;
  --accent2: #a56bff;
  --accent3: #37e6c3;
  --grad: linear-gradient(120deg, var(--accent), var(--accent2));
  --radius: 16px;
  --maxw: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI",
    "Noto Sans JP", system-ui, -apple-system, sans-serif;
  line-height: 1.8;
  overflow-x: hidden;
}

/* ---------- background decoration ---------- */
.bg-glow {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(600px 400px at 15% 10%, rgba(79, 140, 255, 0.16), transparent 70%),
    radial-gradient(700px 500px at 85% 30%, rgba(165, 107, 255, 0.12), transparent 70%),
    radial-gradient(600px 500px at 50% 95%, rgba(55, 230, 195, 0.07), transparent 70%);
}
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 100%);
}

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; gap: 24px;
  padding: 14px 28px;
  background: rgba(7, 11, 20, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-weight: 800; font-size: 1.2rem; letter-spacing: 0.04em;
  color: var(--text); text-decoration: none;
}
.nav-logo .dot { color: var(--accent); }
.nav-links { display: flex; gap: 20px; margin-left: auto; }
.nav-links a {
  color: var(--text-dim); text-decoration: none; font-size: 0.88rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.lang-toggle {
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-size: 0.8rem; font-weight: 700;
  padding: 6px 14px; border-radius: 999px; cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.lang-toggle:hover { border-color: var(--accent); }

/* ---------- layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0 32px; }

.section-title {
  display: flex; align-items: baseline; gap: 14px;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin-bottom: 40px; letter-spacing: 0.02em;
}
.section-num {
  font-size: 0.85rem; font-weight: 700; color: var(--accent);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

/* ---------- hero ---------- */
.hero {
  min-height: 92vh;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: 80px;
}
.hero-eyebrow {
  color: var(--accent3); font-size: 0.85rem; letter-spacing: 0.22em;
  text-transform: uppercase; font-weight: 600; margin-bottom: 18px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.hero-name {
  font-size: clamp(2.6rem, 7vw, 4.6rem); line-height: 1.15;
  font-weight: 800; letter-spacing: 0.02em;
  display: flex; flex-direction: column; gap: 4px;
}
.hero-name-en {
  font-size: clamp(1rem, 2.2vw, 1.4rem); font-weight: 500;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  letter-spacing: 0.14em;
}
.hero-copy {
  margin-top: 26px; font-size: clamp(1rem, 2.4vw, 1.25rem);
  color: var(--text-dim); max-width: 620px;
}
.hero-roles { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.role-chip {
  border: 1px solid var(--border); background: var(--surface);
  padding: 8px 18px; border-radius: 999px; font-size: 0.88rem;
  color: var(--text); text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}
.role-chip:hover { border-color: var(--accent); transform: translateY(-2px); }
.hero-cta {
  margin-top: 52px; align-self: flex-start;
  color: var(--accent); text-decoration: none; font-weight: 600;
  font-size: 0.95rem;
}
.hero-cta:hover { text-decoration: underline; }

/* ---------- about ---------- */
.about-body { max-width: 760px; color: var(--text-dim); display: grid; gap: 18px; }
.about-body p { font-size: 1rem; }

/* ---------- featured (POVLOG) ---------- */
.featured {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px;
  align-items: center;
  background: linear-gradient(160deg, rgba(79,140,255,0.08), rgba(165,107,255,0.06));
  border: 1px solid var(--border); border-radius: 24px;
  padding: 44px; margin-bottom: 28px;
  position: relative; overflow: hidden;
}
.featured::before {
  content: ""; position: absolute; inset: -1px; border-radius: 24px;
  padding: 1px; pointer-events: none;
  background: linear-gradient(120deg, rgba(79,140,255,0.5), transparent 40%, transparent 60%, rgba(165,107,255,0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.featured-badge {
  display: inline-block; font-size: 0.7rem; font-weight: 800;
  letter-spacing: 0.24em; color: var(--accent3);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  margin-bottom: 10px;
}
.featured-name { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; }
.featured-emoji { font-size: 0.8em; }
.featured-tagline {
  margin-top: 8px; font-size: clamp(1.05rem, 2.4vw, 1.3rem); font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.featured-desc { margin-top: 16px; color: var(--text-dim); font-size: 0.95rem; }
.featured-steps { list-style: none; margin-top: 20px; display: grid; gap: 8px; }
.featured-steps li {
  display: flex; gap: 12px; align-items: baseline;
  font-size: 0.9rem; color: var(--text-dim);
}
.featured-steps b {
  color: var(--accent);
  font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.8rem;
}
.featured-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }

/* phone mockup */
.featured-visual { display: flex; justify-content: center; }
.phone {
  width: 220px; height: 448px; border-radius: 36px;
  border: 1px solid rgba(255,255,255,0.18);
  background: #10182b; padding: 10px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5), 0 0 80px rgba(79,140,255,0.15);
  transform: rotate(4deg);
}
.phone-screen {
  width: 100%; height: 100%; border-radius: 28px; overflow: hidden;
  background: linear-gradient(200deg, #1a2440, #0c1120 60%);
  position: relative; display: flex; flex-direction: column;
  justify-content: flex-end; padding: 18px;
}
.film-strip {
  position: absolute; top: 22px; left: 16px; right: 16px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
}
.frame { height: 64px; border-radius: 8px; opacity: 0.9; }
.f1 { background: linear-gradient(140deg, #ff9a62, #d95c8a); }
.f2 { background: linear-gradient(140deg, #4f8cff, #37e6c3); }
.f3 { background: linear-gradient(140deg, #a56bff, #4f5dff); }
.phone-video {
  position: absolute; inset: 0; z-index: 1;
  width: 100%; height: 100%; object-fit: cover;
  border-radius: 28px; background: #0c1120;
}
.phone-caption {
  position: relative; z-index: 2;
  font-weight: 800; letter-spacing: 0.28em; font-size: 0.8rem;
  color: rgba(255,255,255,0.85);
  text-shadow: 0 1px 8px rgba(0,0,0,0.6);
}

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius); padding: 26px;
  transition: transform 0.25s, border-color 0.25s;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-4px); border-color: rgba(79,140,255,0.5); }
.card-name { font-size: 1.15rem; font-weight: 700; }
.card-desc { margin-top: 10px; color: var(--text-dim); font-size: 0.88rem; flex: 1; }
.card-link {
  margin-top: 18px; color: var(--accent); text-decoration: none;
  font-size: 0.85rem; font-weight: 600;
}
.card-link:hover { text-decoration: underline; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; padding: 10px 20px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); text-decoration: none; font-size: 0.86rem; font-weight: 600;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.btn:hover { border-color: var(--accent); transform: translateY(-2px); }
.btn-primary {
  background: var(--grad); border: none; color: #fff;
  box-shadow: 0 6px 24px rgba(79,140,255,0.35);
}
.btn-primary:hover { box-shadow: 0 10px 30px rgba(79,140,255,0.5); }

/* ---------- timeline ---------- */
.timeline { list-style: none; position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--accent), var(--accent2), transparent);
}
.tl-item { position: relative; padding-bottom: 40px; }
.tl-item::before {
  content: ""; position: absolute; left: -28px; top: 8px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent);
  box-shadow: 0 0 12px rgba(79,140,255,0.6);
}
.tl-period {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78rem; color: var(--accent3); letter-spacing: 0.08em;
  min-height: 1em;
}
.tl-role { font-size: 1.15rem; font-weight: 700; margin-top: 4px; }
.tl-role em {
  font-style: normal; font-weight: 500; font-size: 0.85rem;
  color: var(--text-dim); margin-left: 10px;
}
.tl-desc { margin-top: 8px; color: var(--text-dim); font-size: 0.9rem; max-width: 680px; }

.edu {
  margin-top: 12px; border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius); padding: 20px 26px;
  color: var(--text-dim); font-size: 0.9rem;
}
.edu-title { font-size: 0.95rem; color: var(--text); margin-bottom: 4px; }

/* ---------- skills ---------- */
.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.skill {
  display: flex; align-items: center; gap: 16px;
  border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius); padding: 20px 24px;
  transition: border-color 0.25s;
}
.skill:hover { border-color: rgba(165,107,255,0.5); }
.skill-icon { font-size: 1.5rem; }
.skill p { color: var(--text-dim); font-size: 0.92rem; }
.skills-motto {
  margin-top: 28px; text-align: center; font-weight: 700;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- contact ---------- */
#contact { padding-bottom: 80px; }
.contact-lead { color: var(--text-dim); max-width: 620px; }
.contact-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.contact-companies { margin-top: 28px; display: flex; gap: 20px; }
.contact-companies a {
  color: var(--text-dim); font-size: 0.85rem; text-decoration: none;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.contact-companies a:hover { color: var(--accent); }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 24px; text-align: center;
  color: var(--text-dim); font-size: 0.8rem;
}

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .featured { grid-template-columns: 1fr; padding: 32px 24px; }
  .featured-visual { order: -1; }
  .phone { width: 180px; height: 366px; }
  .cards { grid-template-columns: 1fr; }
  .skills { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav { padding: 12px 16px; gap: 12px; }
  .nav-links { display: none; }
  .section { padding: 72px 0 24px; }
}