/* ============================================================
   KEEL Polar Technologies — style.css
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&family=Noto+Sans+JP:wght@300;400;500;600&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Colors */
  --color-navy:      #0A1628;
  --color-ice:       #4FC3F7;
  --color-ice-dim:   #29A8DE;
  --color-white:     #FFFFFF;
  --color-dark:      #1A1A2E;
  --color-gray:      #8892A0;
  --color-gray-light:#B8C2CC;
  --color-bg:        #F8F9FA;
  --color-bg-dark:   #060E1A;
  --color-border:    rgba(255,255,255,0.08);
  --color-border-light: rgba(10,22,40,0.1);

  /* Typography */
  --font-hero:  'Space Grotesk', sans-serif;
  --font-body:  'Inter', 'Noto Sans JP', sans-serif;
  --font-ja:    'Noto Sans JP', sans-serif;

  /* Spacing scale */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  8rem;
  --space-2xl: 12rem;

  /* Layout */
  --container-max: 1280px;
  --nav-height:    72px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 200ms;
  --duration-base: 400ms;
  --duration-slow: 700ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-dark);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 5vw, 5rem);
}

/* ── Section base ── */
.section {
  padding-block: var(--space-xl);
}

.section--dark {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.section--bg {
  background-color: var(--color-bg);
}

/* ── Label / Eyebrow ── */
.label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ice);
  margin-bottom: var(--space-sm);
}

.label--dark {
  color: var(--color-gray);
}

/* ── Heading styles ── */
.heading-xl {
  font-family: var(--font-hero);
  font-size: clamp(3rem, 8vw, 7.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.heading-lg {
  font-family: var(--font-hero);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.heading-md {
  font-family: var(--font-hero);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.heading-sm {
  font-family: var(--font-hero);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.3;
}

/* ── Body text ── */
.text-lg {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.8;
  color: var(--color-gray);
}

.text-md {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-gray);
}

.text-ja {
  font-family: var(--font-ja);
  font-weight: 300;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background-color: var(--color-ice);
  color: var(--color-navy);
}

.btn--primary:hover {
  background-color: var(--color-ice-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79, 195, 247, 0.3);
}

.btn--outline {
  border: 1px solid var(--color-white);
  color: var(--color-white);
}

.btn--outline:hover {
  background-color: var(--color-white);
  color: var(--color-navy);
  transform: translateY(-2px);
}

.btn--outline-dark {
  border: 1px solid var(--color-navy);
  color: var(--color-navy);
}

.btn--outline-dark:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.btn:hover svg {
  transform: translateX(3px);
}

/* ── Divider ── */
.divider {
  width: 48px;
  height: 2px;
  background-color: var(--color-ice);
  margin-block: var(--space-md);
}

/* ── Scroll Fade-in Animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 100ms; }
.fade-in-delay-2 { transition-delay: 200ms; }
.fade-in-delay-3 { transition-delay: 300ms; }
.fade-in-delay-4 { transition-delay: 400ms; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}

.nav.scrolled {
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Logo */
.nav__logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  text-decoration: none;
}

.nav__logo-primary {
  font-family: var(--font-hero);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.05em;
}

.nav__logo-sub {
  font-size: 0.625rem;
  font-weight: 400;
  color: var(--color-ice);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: 2px;
}

.nav__logo-alias {
  font-family: var(--font-ja);
  font-size: 0.5625rem;
  font-weight: 300;
  line-height: 1.25;
  color: rgba(255,255,255,0.68);
  margin-top: 3px;
  white-space: nowrap;
}

/* Desktop links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.04em;
  transition: color var(--duration-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-ice);
  transition: width var(--duration-base) var(--ease-out);
}

.nav__link:hover {
  color: var(--color-white);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--cta {
  color: var(--color-ice);
  border: 1px solid rgba(79, 195, 247, 0.4);
  padding: 0.4rem 1rem;
  border-radius: 2px;
  transition: all var(--duration-fast);
}

.nav__link--cta::after { display: none; }

.nav__link--cta:hover {
  background-color: var(--color-ice);
  color: var(--color-navy);
  border-color: var(--color-ice);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  height: 1.5px;
  background-color: var(--color-white);
  transition: all var(--duration-base) var(--ease-out);
  transform-origin: center;
}

.nav__hamburger.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__hamburger.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile {
  display: none;
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  background: rgba(6, 14, 26, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  z-index: 99;
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.nav__mobile.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.nav__mobile-link {
  font-family: var(--font-hero);
  font-size: 2rem;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  transition: color var(--duration-fast);
}

.nav__mobile-link:hover {
  color: var(--color-ice);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background-color: var(--color-navy);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-top: var(--nav-height);
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.hero__eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-ice);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero__title {
  font-family: var(--font-hero);
  font-size: clamp(3.5rem, 10vw, 9rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.hero__title span {
  color: var(--color-ice);
  display: block;
}

.hero__subtitle {
  font-family: var(--font-ja);
  font-size: clamp(0.9rem, 1.5vw, 1.0625rem);
  font-weight: 300;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-lg);
  max-width: 480px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__scroll {
  display: none;
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255,255,255,0.35);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, rgba(79,195,247,0.5));
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.5; }
}

/* ── Hero SVG Wave Background ── */
.hero__wave {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.18;
}

.hero__glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,195,247,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero__glow-2 {
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 40vw;
  height: 40vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,195,247,0.08) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Grid overlay ── */
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79,195,247,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,195,247,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about {
  background-color: var(--color-bg);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about__text {
  max-width: 560px;
}

.about__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.about__para {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: #4A5568;
}

.about__graphic {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hardware-renders {
  width: 100%;
  max-width: 620px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: minmax(180px, 1fr);
  gap: 1px;
  background-color: var(--color-border-light);
  border: 1px solid var(--color-border-light);
}

.hardware-render {
  min-height: 180px;
  background-color: var(--color-white);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.hardware-render__media {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: clamp(1rem, 3vw, 2rem);
  background-image:
    linear-gradient(rgba(10,22,40,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,22,40,0.035) 1px, transparent 1px);
  background-size: 28px 28px;
}

.hardware-render__media svg {
  width: 100%;
  height: auto;
}

.hardware-render figcaption {
  border-top: 1px solid var(--color-border-light);
  padding: 0.85rem 1rem;
  font-family: var(--font-hero);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-dark);
  letter-spacing: 0.04em;
}

/* ============================================================
   SERVICES SECTION
   ============================================================ */
.services {
  background-color: var(--color-navy);
}

.services__header {
  margin-bottom: var(--space-lg);
  max-width: 600px;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5px;
  background-color: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(255,255,255,0.06);
}

.service-card {
  background-color: var(--color-navy);
  padding: clamp(2rem, 4vw, 3.5rem);
  position: relative;
  overflow: hidden;
  transition: background var(--duration-base) var(--ease-out);
  cursor: default;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(79,195,247,0.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--duration-base);
}

.service-card:hover {
  background-color: rgba(79,195,247,0.04);
}

.service-card:hover::before {
  opacity: 1;
}

.service-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.5rem;
  color: var(--color-ice);
}

.service-card__num {
  position: absolute;
  top: 2rem;
  right: 2rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255,255,255,0.12);
  letter-spacing: 0.1em;
  font-family: var(--font-hero);
}

.service-card__title {
  font-family: var(--font-hero);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.service-card__desc {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
}

.service-card__line {
  width: 32px;
  height: 1.5px;
  background-color: var(--color-ice);
  margin-bottom: 1.5rem;
  transition: width var(--duration-base) var(--ease-out);
}

.service-card:hover .service-card__line {
  width: 64px;
}

/* ============================================================
   PARTNERS SECTION
   ============================================================ */
.partners {
  background-color: var(--color-bg);
}

.partners__header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.partners__grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1px;
  background-color: var(--color-border-light);
  border: 1px solid var(--color-border-light);
  max-width: 900px;
  margin-inline: auto;
}

.partner-item {
  flex: 1;
  min-width: 180px;
  background-color: var(--color-bg);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: background var(--duration-fast);
}

.partner-item:hover {
  background-color: #EEF0F3;
}

.partner-item__category {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ice-dim);
  display: block;
  margin-bottom: 0.5rem;
}

.partner-item__name {
  font-family: var(--font-hero);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-dark);
  line-height: 1.4;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  background-color: var(--color-bg-dark);
  position: relative;
  overflow: hidden;
  text-align: center;
  padding-block: var(--space-2xl);
}

.cta-section__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 100%, rgba(79,195,247,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__content {
  position: relative;
  z-index: 1;
}

.cta-section__title {
  font-family: var(--font-hero);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
  line-height: 1.1;
}

.cta-section__sub {
  font-family: var(--font-ja);
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.05em;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-navy);
  padding-block: var(--space-lg);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr repeat(2, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer__brand {}

.footer__logo {
  font-family: var(--font-hero);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.footer__brand-sub {
  font-family: var(--font-ja);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.footer__email {
  font-size: 0.875rem;
  color: var(--color-ice);
  transition: color var(--duration-fast);
}

.footer__email:hover {
  color: #fff;
}

.footer__col-title {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  margin-bottom: 1.25rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer__link {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--duration-fast);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__bottom {
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__copy {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.25);
}

.footer__location {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.25);
  font-family: var(--font-ja);
}

/* ============================================================
   CONTACT PAGE
   ============================================================ */
.page-header {
  background-color: var(--color-navy);
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-header__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(79,195,247,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-header__content {
  position: relative;
  z-index: 1;
}

.page-header__title {
  font-family: var(--font-hero);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: var(--space-sm);
}

.page-header__sub {
  font-family: var(--font-ja);
  font-size: 1rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.06em;
}

/* ── Contact Form Section ── */
.contact-section {
  padding-block: var(--space-xl);
  background-color: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(3rem, 8vw, 7rem);
  align-items: start;
}

/* Form */
.contact-form__title {
  font-family: var(--font-hero);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-honeypot {
  display: none;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-dark);
  letter-spacing: 0.02em;
}

.form-label span {
  color: var(--color-ice-dim);
  margin-left: 0.25rem;
}

.form-label .optional {
  font-size: 0.75rem;
  color: var(--color-gray-light);
  font-weight: 400;
  margin-left: 0.375rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  color: var(--color-dark);
  background-color: var(--color-white);
  border: 1.5px solid #DDE2E8;
  border-radius: 2px;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #C0C8D2;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-ice);
  box-shadow: 0 0 0 3px rgba(79,195,247,0.12);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: #E53E3E;
  box-shadow: 0 0 0 3px rgba(229,62,62,0.1);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238892A0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-textarea {
  resize: vertical;
  min-height: 160px;
  line-height: 1.7;
}

.form-error {
  font-size: 0.8125rem;
  color: #E53E3E;
  display: none;
}

.form-group.has-error .form-error {
  display: block;
}

.form-submit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.form-note {
  font-size: 0.8125rem;
  color: var(--color-gray-light);
}

.form-submit-error {
  display: none;
  width: 100%;
  font-size: 0.8125rem;
  color: #E53E3E;
}

.form-submit-error.show {
  display: block;
}

/* Success state */
.form-success {
  display: none;
  padding: 2.5rem;
  background-color: rgba(79,195,247,0.07);
  border: 1.5px solid rgba(79,195,247,0.25);
  border-radius: 2px;
  text-align: center;
}

.form-success.show {
  display: block;
}

.form-success__icon {
  width: 48px;
  height: 48px;
  margin-inline: auto;
  margin-bottom: 1.25rem;
  color: var(--color-ice);
}

.form-success__title {
  font-family: var(--font-hero);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 0.75rem;
}

.form-success__text {
  font-family: var(--font-ja);
  font-size: 0.9375rem;
  color: var(--color-gray);
  line-height: 1.8;
}

/* Contact info column */
.contact-info {
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
}

.contact-info__intro {
  font-family: var(--font-ja);
  font-size: 0.9375rem;
  color: var(--color-gray);
  line-height: 1.9;
  margin-bottom: var(--space-lg);
}

.contact-info__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-info__item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-info__icon {
  width: 20px;
  height: 20px;
  color: var(--color-ice);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-info__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-light);
  display: block;
  margin-bottom: 0.25rem;
}

.contact-info__value {
  font-size: 0.9375rem;
  color: var(--color-dark);
}

.contact-info__value a {
  color: var(--color-ice-dim);
  transition: color var(--duration-fast);
}

.contact-info__value a:hover {
  color: var(--color-ice);
}

/* ============================================================
   RESPONSIVE — 1024px
   ============================================================ */
@media (max-width: 1024px) {
  .about__inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about__graphic {
    max-width: 620px;
    margin-inline: auto;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

/* ============================================================
   RESPONSIVE — 768px (Mobile)
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --space-lg: 3rem;
    --space-xl: 5rem;
    --space-2xl: 7rem;
  }

  /* Nav */
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile {
    display: flex;
  }

  .nav__logo-alias {
    font-size: 0.5rem;
  }

  /* Hero */
  .hero__scroll {
    display: flex;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Services */
  .services__grid {
    grid-template-columns: 1fr;
  }

  .hardware-renders {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  /* Utility */
  .hide-mobile {
    display: none;
  }

  /* Partners */
  .partners__grid {
    flex-direction: column;
  }

  .partner-item {
    width: 100%;
  }

  /* Footer */
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-info {
    position: static;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   RESPONSIVE — 480px (Small Mobile)
   ============================================================ */
@media (max-width: 480px) {
  .btn {
    padding: 0.75rem 1.75rem;
    font-size: 0.875rem;
  }

  .form-submit {
    flex-direction: column;
    align-items: stretch;
  }

  .form-submit .btn {
    text-align: center;
    justify-content: center;
  }
}