/* ============================================================
   SwiftAct · style.css
   Illustrated night-sky theme · Commercial landing page
   ============================================================ */

/* ── Tokens ──────────────────────────────────────────────── */
:root {
  /* Sky palette */
  --sky-deep:   #08090a;
  --sky-mid:    #0d1020;
  --sky-light:  #141830;

  /* Brand blues */
  --blue:       #5b8fff;
  --blue-dim:   #3a6fd4;
  --blue-glow:  rgba(91, 143, 255, 0.3);

  /* Text — spectral scale (SpaceX #f0f0fa = starlight white) */
  --t1:  #f0f0fa;
  --t2:  #8a9ab8;
  --t3:  #4a5870;

  /* Glass — Linear-style: neutral dark bg, white semi-transparent border */
  --glass-bg:  rgba(6, 8, 18, 0.62);
  --glass-bd:  rgba(255, 255, 255, 0.07);
  --glass-sh:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 8px 40px rgba(0, 0, 0, 0.60);

  /* Type */
  --sans:    'Inter', -apple-system, sans-serif;
  --display: 'Space Grotesk', 'Inter', sans-serif;

  /* Accent blues */
  --blue-light: #a8c8ff;
  --blue-lighter: #66aaff;

  /* Background */
  --bg: #08090a;

  /* Motion */
  --ease: cubic-bezier(.4,0,.2,1);
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--t1);
  font-family: var(--sans);
  font-feature-settings: "cv01", "ss03";  /* Inter geometric alternates */
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
input, textarea, button { font-family: inherit; }

/* ── Focus indicator ─────────────────────────────────────── */
*:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

/* ── Skip link ───────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(-100%);
  background: var(--blue);
  color: var(--t1);
  padding: 10px 18px;
  font-size: .85rem;
  font-weight: 500;
  z-index: 1000;
  transition: transform .2s;
}
.skip-link:focus { transform: translateY(0); }

/* ── Sky canvas ──────────────────────────────────────────── */
#sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 800;
  padding: 18px 0;
  background: transparent;
}

/* Scroll-based nav background — applied via JS */
.nav.nav-scrolled {
  background: rgba(12, 13, 18, 0.65);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background .35s, backdrop-filter .35s, border-color .35s;
}
.nav.nav-scrolled .nav-links li a { color: rgba(255, 255, 255, 0.9); }
.nav.nav-scrolled .nav-links li a.active { color: var(--blue); }

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--t1);
}
.logo svg { filter: drop-shadow(0 0 5px rgba(91,143,255,.5)); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links li a {
  font-size: .875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  background: none;
  transition: color .25s;
}
.nav-links li a:hover { color: var(--t1); }
.nav-links li a.active { color: var(--blue); }

.nav-btn {
  padding: 8px 22px !important;
  border-radius: 100px !important;
  border: 1px solid rgba(91,143,255,.35) !important;
  background: rgba(91,143,255,.1) !important;
  color: var(--blue) !important;
  transition: background .25s, box-shadow .25s !important;
}
.nav-btn:hover {
  background: rgba(91,143,255,.2) !important;
  box-shadow: 0 0 20px rgba(91,143,255,.2);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 900;
}
.burger span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--t1);
  border-radius: 2px;
  transition: all .3s var(--ease);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--blue), var(--blue-dim));
  color: var(--t1);
  font-size: .9rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(58,111,212,.4);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
  text-decoration: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 36px rgba(58,111,212,.55);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 13px 24px;
  border-radius: 100px;
  color: var(--t1);
  font-size: .9rem;
  font-weight: 500;
  background: rgba(240, 240, 250, 0.07);
  border: 1px solid rgba(240, 240, 250, 0.28);
  transition: background .25s, border-color .25s;
  text-decoration: none;
}
.btn-ghost:hover {
  background: rgba(240, 240, 250, 0.13);
  border-color: rgba(240, 240, 250, 0.45);
}

.btn-full { width: 100%; justify-content: center; border-radius: 12px; }

/* ============================================================
   Layout helpers
   ============================================================ */
.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  position: relative;
  z-index: 1;
  padding: 80px 0;
}

/* Glass card */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-bd);
  box-shadow: var(--glass-sh);
}

/* Section header */
.sec-tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 14px;
}
.sec-head { text-align: center; margin-bottom: 48px; }

.sec-head-left { text-align: left; }
.sec-head-left .sec-desc { margin-left: 0; margin-right: 0; }

/* Section CTA — low-emphasis link below a section */
.sec-cta { text-align: center; margin-top: 40px; }
.sec-cta-left { text-align: left; }

/* ============================================================
   Page header (used on all content pages)
   ============================================================ */
.page-header {
  margin-bottom: 64px;
}

.page-title {
  font-family: var(--display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: 16px;
  max-width: 840px;
}

.page-motto {
  font-family: var(--display);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 500;
  color: var(--t2);
  line-height: 1.5;
  margin-bottom: 12px;
  max-width: 700px;
}

.page-desc {
  font-size: 1rem;
  color: var(--t3);
  line-height: 1.7;
  max-width: 600px;
}

/* ============================================================
   Content list (OpenAI Research style)
   ============================================================ */
.content-list {
  display: flex;
  flex-direction: column;
}

.content-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 40px;
  padding: 32px 0;
  border-bottom: 1px solid var(--glass-bd);
}

.content-item:last-child {
  border-bottom: none;
}

.content-date {
  font-size: .85rem;
  color: var(--t3);
  padding-top: 4px;
}

.new-badge {
  display: inline-block;
  font-size: .65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--t1);
  background: var(--blue);
  padding: 3px 8px;
  border-radius: 4px;
  margin-left: 8px;
  vertical-align: middle;
}

.content-body h3 {
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -.01em;
  color: var(--t1);
}

.content-body p {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .content-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 24px 0;
  }
  .content-date { padding-top: 0; }
}

.sec-title {
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.12;
  margin-bottom: 18px;
}
.sec-desc {
  font-size: 1.05rem;
  color: var(--t2);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.75;
}

/* Scroll reveal: fade in + scale up */
.fade-up {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: var(--d, 0ms);
}
.fade-up.in {
  opacity: 1;
  transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    transition: none;
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 32px 40px;
}

.hero-body { max-width: 780px; }

.eyebrow {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 28px;
  padding: 6px 16px;
  border: 1px solid rgba(91,143,255,.25);
  border-radius: 100px;
  background: rgba(91,143,255,.07);
}

.hero-title {
  font-family: var(--display);
  font-size: clamp(3rem, 7.5vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -.04em;   /* Linear-style compression at display scale */
  line-height: 1.04;
  margin-bottom: 28px;
  color: var(--t1);
}

/* Gradient text on "可靠交付" — static, no animation */
.shine {
  position: relative;
  display: inline-block;
  background: linear-gradient(
    100deg,
    #7aadff 0%,
    #ddeeff 45%,
    #5b8fff 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 30px rgba(91,143,255,.4));
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--t3);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 32px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

/* ============================================================
   Product list (products page)
   ============================================================ */
.product-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.product-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 32px;
  align-items: start;
  padding: 36px 40px;
  border-radius: 20px;
  transition: transform .3s var(--ease), border-color .3s;
}

.product-item:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.16);
}

.product-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: rgba(91, 143, 255, 0.07);
  border: 1px solid rgba(91, 143, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-icon svg { flex-shrink: 0; }

.product-label {
  display: inline-block;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}

.product-meta h3 {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 10px;
  color: var(--t1);
}

.product-meta p {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.75;
  max-width: 640px;
}

/* ============================================================
   Service list (services page)
   ============================================================ */
.service-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.service-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 32px;
  align-items: start;
  padding: 36px 40px;
  border-radius: 20px;
  transition: transform .3s var(--ease), border-color .3s;
}

.service-item:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.16);
}

.service-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: rgba(91, 143, 255, 0.07);
  border: 1px solid rgba(91, 143, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-icon svg { flex-shrink: 0; }

.service-label {
  display: inline-block;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}

.service-meta h3 {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 10px;
  color: var(--t1);
}

.service-meta p {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.75;
  max-width: 640px;
}

@media (max-width: 768px) {
  .product-item,
  .service-item { grid-template-columns: 1fr; gap: 20px; padding: 28px 24px; }
}

/* ============================================================
   Products
   ============================================================ */
.product-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 56px;
  border-radius: 24px;
  border: 1px solid var(--glass-bd);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--glass-sh);
}

.product-tag {
  display: inline-block;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 14px;
}
.product-name {
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 16px;
}
.product-desc {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.75;
  margin-bottom: 24px;
}
.product-feats {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}
.product-feats li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .875rem;
  color: var(--t2);
}
.product-feats svg { flex-shrink: 0; }

/* Software Mockup */
.mock-window {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(4, 6, 16, 0.88);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.04),
    0 24px 80px rgba(0, 0, 0, 0.70);
}
.mock-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  background: rgba(4, 7, 18, 0.7);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.m-dot {
  width: 11px; height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}
.m-dot.r { background: #ff5f57; }
.m-dot.y { background: #febc2e; }
.m-dot.g { background: #28c840; }
.m-title {
  flex: 1;
  text-align: center;
  font-size: .72rem;
  color: var(--t3);
  letter-spacing: .04em;
}
.m-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .62rem;
  letter-spacing: .06em;
}
.m-badge.live { color: var(--blue-light); }
.m-badge i {
  display: block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue-lighter);
  box-shadow: 0 0 6px var(--blue-lighter);
  animation: blink 1.5s ease-in-out infinite;
}
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:.35; } }

.mock-body {
  display: grid;
  grid-template-columns: 150px 1fr;
  min-height: 240px;
}
.mock-side {
  border-right: 1px solid rgba(255,255,255,.04);
  padding: 14px 0;
  background: rgba(4,7,18,.4);
}
.ms-item {
  padding: 9px 16px;
  font-size: .75rem;
  color: var(--t3);
  cursor: default;
  border-right: 2px solid transparent;
}
.ms-item.on { color: var(--blue); background: rgba(91,143,255,.07); border-right-color: var(--blue); }

.mock-main {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.wf-wrap {
  background: rgba(4,7,18,.5);
  border: 1px solid rgba(255,255,255,.04);
  border-radius: 8px;
  padding: 10px 12px;
  overflow: hidden;
}
#waveCanvas { width: 100%; display: block; }

.knob-row {
  display: flex;
  gap: 18px;
  padding: 0 4px;
}
.knob-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.knob-unit span {
  font-size: .6rem;
  color: var(--t3);
  text-transform: uppercase;
  letter-spacing: .06em;
}

/* CSS knob using conic-gradient */
.knob {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: conic-gradient(
    from -135deg,
    var(--blue) 0%,
    var(--blue) calc(var(--v, 50) * 2.7deg),
    rgba(30,50,90,.8) calc(var(--v, 50) * 2.7deg),
    rgba(30,50,90,.8) 100%
  );
  border: 1.5px solid rgba(91,143,255,.3);
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
.knob::after {
  content: '';
  position: absolute;
  top: 7px; left: 50%;
  transform: translateX(-50%);
  width: 2px; height: 6px;
  background: rgba(255,255,255,.9);
  border-radius: 1px;
}

.mock-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.lat {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .65rem;
  color: var(--blue-light);
  letter-spacing: .05em;
}
.lat i {
  display: block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue-light);
  box-shadow: 0 0 7px var(--blue-light);
  animation: blink 1.5s ease-in-out infinite;
}
.sr { font-size: .62rem; color: var(--t3); letter-spacing: .04em; }

/* ============================================================
   Services
   ============================================================ */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.svc-card {
  border-radius: 20px;
  padding: 36px 30px;
  transition: transform .3s var(--ease), border-color .3s;
}
.svc-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.16);
}

.svc-icon {
  width: 50px; height: 50px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.svc-card h3 {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--t1);
}
.svc-card > p {
  font-size: .875rem;
  color: var(--t2);
  line-height: 1.72;
  margin-bottom: 20px;
}

.svc-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding-top: 18px;
  border-top: 1px solid var(--glass-bd);
}
.svc-list li {
  font-size: .78rem;
  color: var(--t3);
  padding-left: 14px;
  position: relative;
}
.svc-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--blue);
  opacity: .6;
}

/* ============================================================
   About
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: start;
}

.about-p {
  font-size: 1.02rem;
  color: var(--t2);
  line-height: 1.8;
  margin-bottom: 18px;
}
.about-p strong { color: var(--t1); font-weight: 600; }

.about-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--glass-bd);
  border: 1px solid var(--glass-bd);
  border-radius: 18px;
  overflow: hidden;
  min-width: 280px;
}
.fact-item {
  background: var(--glass-bg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.fact-n {
  font-family: var(--display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--blue-light);
}
.fact-l {
  font-size: .72rem;
  color: var(--t3);
  letter-spacing: .04em;
}

/* ============================================================
   Contact
   ============================================================ */
.contact-box {
  max-width: 640px;
  margin: 0 auto;
  padding: 64px 56px;
  border-radius: 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.contact-glow {
  position: absolute;
  top: -100px; left: 50%;
  transform: translateX(-50%);
  width: 400px; height: 300px;
  background: radial-gradient(ellipse, rgba(91,143,255,.1), transparent 70%);
  pointer-events: none;
}
.contact-title {
  font-family: var(--display);
  font-size: clamp(1.8rem,3.5vw,2.5rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin: 12px 0 14px;
}
.contact-desc {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.72;
  margin-bottom: 36px;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  color: var(--t1);
  font-size: .9rem;
  outline: none;
  transition: border-color .25s;
  resize: vertical;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--t3); }
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(255, 255, 255, 0.22);
}
.contact-alt {
  margin-top: 18px;
  font-size: .82rem;
  color: var(--t3);
}
.contact-alt a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Contact form wrap (standalone on contact page) */
.contact-form-wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 48px;
  border-radius: 28px;
  text-align: center;
}

.contact-form-title {
  font-family: var(--display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 10px;
  color: var(--t1);
}

.contact-form-desc {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.72;
  margin-bottom: 32px;
}

.form-select {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  color: var(--t1);
  font-size: .9rem;
  outline: none;
  transition: border-color .25s;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.form-select:focus { border-color: rgba(255, 255, 255, 0.22); }
.form-select option { background: #0d1020; color: var(--t1); }

.contact-form-alt {
  margin-top: 18px;
  font-size: .82rem;
  color: var(--t3);
}

.contact-form-alt a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Contact info list spacing */
.contact-info-list { margin-top: 48px; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  .product-card { grid-template-columns: 1fr; gap: 40px; }
  .svc-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-facts { max-width: 320px; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(4, 5, 12, 0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 700;
  }
  .nav-links.open { display: flex; }
  .nav-links li a { font-size: 1.1rem; }
  .burger { display: flex; }

  .hero { padding: 120px 24px 40px; }
  .hero-title { font-size: 3rem; }
  .section { padding: 88px 0; }
  .wrap { padding: 0 20px; }

  .product-card { padding: 32px 24px; }
  .mock-body { grid-template-columns: 1fr; }
  .mock-side { display: none; }

  .form-row { grid-template-columns: 1fr; }
  .contact-box { padding: 44px 24px; }

}

/* ============================================================
   Day theme  (6:00–18:00 · minimal white)
   ============================================================ */
[data-theme="day"] {
  /* Tokens */
  --t1:       #1a1a1a;
  --t2:       #5a5a5a;
  --t3:       #9a9a9a;
  --bg:       #ffffff;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bd: rgba(0, 0, 0, 0.08);
  --glass-sh:
    rgba(0, 0, 0, 0.06) 0px 0px 0px 1px,
    rgba(0, 0, 0, 0.04) 0px 4px 20px;
}

/* Canvas hidden in day mode */
[data-theme="day"] #sky { display: none; }

[data-theme="day"] body {
  background: var(--bg);
  color: var(--t1);
}

/* Nav */
[data-theme="day"] .nav {
  background: transparent;
}
[data-theme="day"] .logo,
[data-theme="day"] .nav-links li a { color: var(--t1); background: none; }
[data-theme="day"] .nav-links li a:hover { color: var(--t1); }
[data-theme="day"] .nav-links li a.active { color: var(--blue); }
[data-theme="day"] .nav-btn {
  border-color: rgba(91,143,255,.3) !important;
  background: rgba(91,143,255,.06) !important;
}

/* Buttons */
[data-theme="day"] .btn-ghost {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.14);
  color: var(--t1);
}
[data-theme="day"] .btn-ghost:hover {
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.22);
}

/* Hero */
[data-theme="day"] .hero-title { color: var(--t1); }
[data-theme="day"] .eyebrow {
  border-color: rgba(91,143,255,.2);
  background: rgba(91,143,255,.05);
}

/* Product mockup — keep dark; dark UI on white is intentional */
[data-theme="day"] .mock-window {
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.08),
    0 24px 80px rgba(0, 0, 0, 0.12);
}

/* Service cards */
[data-theme="day"] .svc-card:hover { border-color: rgba(0, 0, 0, 0.14); }
[data-theme="day"] .svc-icon {
  background: rgba(91,143,255,.06);
  border-color: rgba(91,143,255,.14);
}
[data-theme="day"] .svc-card h3 { color: var(--t1); }
[data-theme="day"] .svc-list { border-top-color: rgba(0,0,0,0.07); }

/* About */
[data-theme="day"] .about-p strong { color: var(--t1); }
[data-theme="day"] .about-facts { background: rgba(0,0,0,0.06); }
[data-theme="day"] .fact-item { background: var(--bg); }
[data-theme="day"] .fact-n { color: var(--blue); }

/* Contact */
[data-theme="day"] .contact-form input,
[data-theme="day"] .contact-form textarea {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.09);
  color: var(--t1);
}
[data-theme="day"] .contact-form input:focus,
[data-theme="day"] .contact-form textarea:focus {
  border-color: rgba(0, 0, 0, 0.22);
}
[data-theme="day"] .contact-form input::placeholder,
[data-theme="day"] .contact-form textarea::placeholder { color: var(--t3); }
[data-theme="day"] .contact-glow {
  background: radial-gradient(ellipse, rgba(91,143,255,.08), transparent 70%);
}

/* Product & Service items (day) */
[data-theme="day"] .product-item:hover,
[data-theme="day"] .service-item:hover { border-color: rgba(0, 0, 0, 0.14); }
[data-theme="day"] .product-icon,
[data-theme="day"] .service-icon {
  background: rgba(91,143,255,.06);
  border-color: rgba(91,143,255,.14);
}

/* Contact form (day) */
[data-theme="day"] .form-select {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.09);
  color: var(--t1);
}
[data-theme="day"] .form-select:focus { border-color: rgba(0, 0, 0, 0.22); }
[data-theme="day"] .form-select option { background: #ffffff; }

/* Footer social (day) */
[data-theme="day"] .footer-social a {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.09);
  color: var(--t3);
}
[data-theme="day"] .footer-social a:hover {
  background: rgba(91,143,255,.08);
  border-color: rgba(91,143,255,.2);
  color: var(--blue);
}

/* Nav scrolled (day) */
[data-theme="day"] .nav.nav-scrolled {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-bottom-color: rgba(0, 0, 0, 0.08);
}
[data-theme="day"] .nav.nav-scrolled .nav-links li a { color: var(--t1); }
[data-theme="day"] .nav.nav-scrolled .nav-links li a.active { color: var(--blue); }

/* Mobile nav overlay — day mode */
[data-theme="day"] .burger span { background: var(--t1); }

/* ============================================================
   Article page
   ============================================================ */
.article-page {
  padding-top: 160px;
}

.article-header {
  text-align: center;
  margin-bottom: 64px;
}

.article-date {
  display: block;
  font-size: .9rem;
  color: var(--t3);
  margin-bottom: 24px;
}

.article-title {
  font-family: var(--display);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.15;
  max-width: 840px;
  margin: 0 auto 20px;
}
@media (max-width: 768px) {
  .article-title { font-size: 2.25rem; }
}

.article-author {
  font-size: .95rem;
  color: var(--t2);
}

.article-body {
  max-width: 680px;
  margin: 0 auto;
}

.article-body h2 {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 48px 0 20px;
  letter-spacing: -.01em;
  color: var(--t1);
}

.article-body p {
  font-size: 1.05rem;
  color: var(--t2);
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-body ul {
  margin: 20px 0 20px 24px;
  list-style: disc;
}

.article-body li {
  font-size: 1.05rem;
  color: var(--t2);
  line-height: 1.8;
  margin-bottom: 8px;
}

[data-theme="day"] .article-body p,
[data-theme="day"] .article-body li {
  color: var(--t2);
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--glass-bd);
  padding: 64px 0 32px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 48px;
}

.footer-logo {
  font-family: var(--display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--t1);
  letter-spacing: -.02em;
  display: block;
  margin-bottom: 12px;
}

.footer-belief {
  font-size: .95rem;
  color: var(--t2);
  line-height: 1.6;
  max-width: 320px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  justify-content: flex-end;
}

.footer-links a {
  font-size: .9rem;
  color: var(--t2);
  transition: color .2s var(--ease);
}

.footer-links a:hover { color: var(--blue); }

.footer-social {
  display: flex;
  gap: 14px;
  margin-top: 20px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--t2);
  transition: all .25s var(--ease);
}

.footer-social a:hover {
  background: rgba(91, 143, 255, 0.1);
  border-color: rgba(91, 143, 255, 0.25);
  color: var(--blue);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid var(--glass-bd);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: .82rem;
  color: var(--t3);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-links { justify-content: flex-start; }
  .site-footer { padding: 48px 0 24px; }
}

@media (max-width: 768px) {
  [data-theme="day"] .nav-links {
    background: rgba(255, 255, 255, 0.98) !important;
  }
}

/* ============================================================
   Night theme token overrides
   ============================================================ */
[data-theme="night"] {
  --blue:       #90c8ff;
  --blue-dim:   #5a8fd4;
  --blue-glow:  rgba(144, 200, 255, 0.35);
  --t2:         #a0b8d8;
}

[data-theme="night"] .article-title {
  color: #c8dff5;
}
[data-theme="night"] .article-body h2,
[data-theme="night"] .article-body h3 {
  color: var(--blue);
}
[data-theme="night"] .article-body strong {
  color: #78b0e8;
}
[data-theme="night"] .content-body h3 a,
[data-theme="night"] .content-body h3 {
  color: var(--blue);
}