/* ============================================================
   Iron Weave Structure | 株式会社アイアンウィーブストラクチャー
   Main Stylesheet
   ============================================================ */

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

/* ============================================================
   1. CSS Reset & Variables
   ============================================================ */

:root {
  --bg:          #0a0a0e;
  --surface:     #111118;
  --surface2:    #1a1a24;
  --border:      #252535;
  --steel:       #4a4a5a;
  --silver:      #8888a0;
  --white:       #f0f0f8;
  --blue:        #3a9eff;
  --blue-dim:    #1e5a99;
  --blue-glow:   rgba(58, 158, 255, 0.12);

  --font-head:   'Syncopate', sans-serif;
  --font-body:   'Noto Sans JP', sans-serif;

  --nav-height:  72px;
  --radius-sm:   4px;
  --radius:      8px;
  --radius-lg:   16px;

  --transition:  0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s ease;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px rgba(58, 158, 255, 0.2);
  --shadow-glow-strong: 0 0 48px rgba(58, 158, 255, 0.35);

  --container-max: 1200px;
  --container-pad: clamp(1.5rem, 4vw, 3rem);

  --z-nav:       100;
  --z-modal:     200;
  --z-toast:     300;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--white);
}

ul,
ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
}

/* ============================================================
   2. Base Typography
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.05em;
  color: var(--white);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1rem, 2vw, 1.35rem); }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  color: var(--silver);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

strong {
  font-weight: 700;
  color: var(--white);
}

small {
  font-size: 0.8rem;
  color: var(--steel);
}

.text-blue   { color: var(--blue); }
.text-silver { color: var(--silver); }
.text-white  { color: var(--white); }
.text-center { text-align: center; }
.text-right  { text-align: right; }

.lead {
  font-size: 1.15rem;
  color: var(--silver);
  line-height: 1.9;
}

.mono {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9em;
  color: var(--blue);
  background: var(--surface2);
  padding: 0.1em 0.4em;
  border-radius: var(--radius-sm);
}

/* ============================================================
   3. Navigation
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 var(--container-pad);
  background: rgba(10, 10, 14, 0.6);
  backdrop-filter: blur(16px) saturate(120%);
  -webkit-backdrop-filter: blur(16px) saturate(120%);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(10, 10, 14, 0.92);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img {
  height: 36px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--white);
  text-transform: uppercase;
  white-space: nowrap;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--blue);
  transform: translateX(-50%);
  transition: width var(--transition);
  border-radius: 2px;
}

.nav__link:hover,
.nav__link.active {
  color: var(--white);
  background: var(--blue-glow);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 70%;
}

.nav__cta {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--blue-dim);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.nav__cta:hover {
  background: var(--blue);
  color: var(--bg);
  box-shadow: var(--shadow-glow);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.nav__hamburger:hover {
  background: var(--surface2);
}

.nav__hamburger span {
  display: block;
  height: 2px;
  background: var(--silver);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), width var(--transition);
}

.nav__hamburger span:nth-child(2) { width: 70%; }

.nav__hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
  width: 0;
}

.nav__hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(10, 10, 14, 0.97);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem var(--container-pad);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition), opacity var(--transition);
  z-index: calc(var(--z-nav) - 1);
}

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

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav__mobile-link {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.nav__mobile-link:hover,
.nav__mobile-link.active {
  color: var(--white);
  background: var(--blue-glow);
  border-left-color: var(--blue);
}

/* ============================================================
   4. Hero Section
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--nav-height) var(--container-pad) 0;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(58, 158, 255, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 80% 80%, rgba(58, 158, 255, 0.04) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, #0d0d18 100%);
}

/* Animated grid lines */
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(58, 158, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 158, 255, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  animation: gridDrift 20s linear infinite;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, var(--bg) 0%, transparent 30%, transparent 70%, var(--bg) 100%);
}

@keyframes gridDrift {
  0%   { transform: translate(0, 0); }
  100% { transform: translate(80px, 80px); }
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  width: 100%;
}

.hero__eyebrow {
  font-family: var(--font-head);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.hero__eyebrow::before,
.hero__eyebrow::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue-dim));
}

.hero__eyebrow::after {
  background: linear-gradient(90deg, var(--blue-dim), transparent);
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 1.05;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--white) 0%, var(--silver) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(0.85rem, 1.5vw, 1rem);
  color: var(--silver);
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
}

.hero__desc {
  font-size: 1.05rem;
  color: var(--silver);
  line-height: 1.9;
  max-width: 580px;
  margin: 0 auto 2.5rem;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--steel);
  font-family: var(--font-head);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  animation: scrollBounce 2.5s ease-in-out infinite;
}

.hero__scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, var(--steel), transparent);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* Parallax layer */
.hero__parallax {
  position: absolute;
  inset: 0;
  z-index: 0;
  will-change: transform;
}

/* ============================================================
   5. Section Styles
   ============================================================ */

.section {
  padding: clamp(4rem, 8vw, 7rem) var(--container-pad);
}

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

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

.section--surface2 {
  background-color: var(--surface2);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
}

.section__header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section__header--center {
  text-align: center;
}

.section__label {
  font-family: var(--font-head);
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.75rem;
  display: block;
}

.section__title {
  position: relative;
  display: inline-block;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), transparent);
  border-radius: 2px;
}

.section__header--center .section__title::after {
  left: 50%;
  transform: translateX(-50%);
}

.section__desc {
  color: var(--silver);
  max-width: 560px;
  font-size: 1.05rem;
}

.section__header--center .section__desc {
  margin: 0 auto;
}

/* ============================================================
   6. Cards
   ============================================================ */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue-dim), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  border-color: rgba(58, 158, 255, 0.35);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  transform: translateY(-4px);
}

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

.card--surface2 {
  background: var(--surface2);
}

.card--flat {
  border-radius: 0;
  border-left: 2px solid var(--border);
  border-right: none;
  border-top: none;
  border-bottom: none;
  padding-left: 1.5rem;
}

.card--flat:hover {
  border-left-color: var(--blue);
  transform: translateX(4px) translateY(0);
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-glow);
  border: 1px solid rgba(58, 158, 255, 0.2);
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  color: var(--blue);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.card__title {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
  color: var(--white);
}

.card__body {
  color: var(--silver);
  font-size: 0.95rem;
  line-height: 1.7;
}

.card__footer {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card__link {
  font-family: var(--font-head);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap var(--transition);
}

.card__link:hover {
  gap: 0.7rem;
  color: var(--white);
}

/* ============================================================
   7. Grid Layouts
   ============================================================ */

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--auto-sm {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid--aside {
  grid-template-columns: 1fr 360px;
  gap: 3rem;
}

.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }

/* ============================================================
   8. Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary: electric blue outline */
.btn--primary {
  color: var(--blue);
  border-color: var(--blue);
  background: var(--blue-glow);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  z-index: 0;
}

.btn--primary:hover {
  color: var(--bg);
  box-shadow: var(--shadow-glow-strong);
  border-color: var(--blue);
}

.btn--primary:hover::before {
  transform: scaleX(1);
}

.btn--primary > * {
  position: relative;
  z-index: 1;
}

.btn--primary span {
  position: relative;
  z-index: 1;
}

/* Secondary: ghost */
.btn--secondary {
  color: var(--silver);
  border-color: var(--border);
  background: transparent;
}

.btn--secondary:hover {
  color: var(--white);
  border-color: var(--steel);
  background: var(--surface2);
}

/* Solid filled */
.btn--solid {
  color: var(--bg);
  background: var(--blue);
  border-color: var(--blue);
}

.btn--solid:hover {
  background: #5cb3ff;
  border-color: #5cb3ff;
  box-shadow: var(--shadow-glow);
  color: var(--bg);
}

/* Small */
.btn--sm {
  font-size: 0.65rem;
  padding: 0.55rem 1.2rem;
}

/* Large */
.btn--lg {
  font-size: 0.8rem;
  padding: 1rem 2.5rem;
}

/* Icon button */
.btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

/* ============================================================
   9. Footer
   ============================================================ */

.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: clamp(3rem, 6vw, 5rem) var(--container-pad) 2rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.footer__logo-img {
  height: 32px;
}

.footer__brand-name {
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
}

.footer__tagline {
  font-size: 0.9rem;
  color: var(--steel);
  line-height: 1.6;
  margin-bottom: 0;
}

.footer__social {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.footer__social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--steel);
  font-size: 0.9rem;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--blue);
  border-color: var(--blue-dim);
  background: var(--blue-glow);
}

.footer__col-title {
  font-family: var(--font-head);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1.25rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer__link {
  font-size: 0.9rem;
  color: var(--steel);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer__link:hover {
  color: var(--blue);
  padding-left: 4px;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--steel);
  margin-bottom: 0;
}

.footer__legal {
  display: flex;
  gap: 1.5rem;
}

.footer__legal-link {
  font-size: 0.8rem;
  color: var(--steel);
  transition: color var(--transition-fast);
}

.footer__legal-link:hover {
  color: var(--silver);
}

/* ============================================================
   10. Page Hero / Inner Page Header
   ============================================================ */

.page-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: calc(var(--nav-height) + 3rem) var(--container-pad) 3rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 100% at 50% 100%, var(--blue-glow) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
}

.page-hero__title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin-bottom: 0.75rem;
}

.page-hero__desc {
  font-size: 1.05rem;
  color: var(--silver);
  max-width: 540px;
  margin-bottom: 0;
}

/* ============================================================
   11. Feature Lists
   ============================================================ */

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
}

.feature-item:hover {
  border-color: rgba(58, 158, 255, 0.25);
  background: rgba(26, 26, 36, 0.8);
}

.feature-item__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-glow);
  border: 1px solid rgba(58, 158, 255, 0.18);
  border-radius: var(--radius-sm);
  color: var(--blue);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.feature-item__content {}

.feature-item__title {
  font-size: 1rem;
  margin-bottom: 0.3rem;
  color: var(--white);
}

.feature-item__desc {
  font-size: 0.9rem;
  color: var(--silver);
  margin-bottom: 0;
  line-height: 1.6;
}

/* Check list */
.check-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.check-list__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--silver);
}

.check-list__item::before {
  content: '';
  display: block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: var(--blue-glow);
  border: 1px solid var(--blue-dim);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 6l3 3 5-5' stroke='%233a9eff' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 10px;
  background-repeat: no-repeat;
  background-position: center;
}

/* ============================================================
   12. Timeline Component
   ============================================================ */

.timeline {
  position: relative;
  padding-left: 2.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--blue), var(--border) 80%, transparent);
}

.timeline__item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -2.5rem;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--blue);
  border-radius: 50%;
  border: 2px solid var(--bg);
  box-shadow: 0 0 12px rgba(58, 158, 255, 0.5);
  transform: translateX(-5.5px);
}

.timeline__date {
  font-family: var(--font-head);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.4rem;
}

.timeline__title {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  color: var(--white);
}

.timeline__body {
  font-size: 0.9rem;
  color: var(--silver);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ============================================================
   13. Contact Form
   ============================================================ */

.form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

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

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form__label {
  font-family: var(--font-head);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--silver);
}

.form__label span {
  color: var(--blue);
  margin-left: 0.2em;
}

.form__input,
.form__textarea,
.form__select {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  border-color: var(--blue-dim);
  background: rgba(26, 26, 36, 0.9);
  box-shadow: 0 0 0 3px rgba(58, 158, 255, 0.08);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--steel);
}

.form__input.error,
.form__textarea.error {
  border-color: #e05555;
  box-shadow: 0 0 0 3px rgba(224, 85, 85, 0.1);
}

.form__textarea {
  resize: vertical;
  min-height: 140px;
}

.form__select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238888a0' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 12px;
  cursor: pointer;
}

.form__error {
  font-size: 0.78rem;
  color: #e05555;
  display: none;
}

.form__error.visible {
  display: block;
}

.form__hint {
  font-size: 0.78rem;
  color: var(--steel);
}

.form__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.form__privacy {
  font-size: 0.8rem;
  color: var(--steel);
}

/* Checkbox & Radio */
.form__check {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
}

.form__check input[type="checkbox"],
.form__check input[type="radio"] {
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
  cursor: pointer;
}

.form__check-label {
  font-size: 0.9rem;
  color: var(--silver);
  cursor: pointer;
}

/* ============================================================
   14. Responsive Breakpoints
   ============================================================ */

/* Tablet < 1024px */
@media (max-width: 1023px) {
  :root {
    --nav-height: 64px;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--aside {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile {
    display: block;
  }
}

/* Mobile < 768px */
@media (max-width: 767px) {
  :root {
    --nav-height: 60px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .col-span-2,
  .col-span-3 {
    grid-column: span 1;
  }

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

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

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

  .btn {
    justify-content: center;
  }

  .timeline {
    padding-left: 2rem;
  }

  .section {
    padding: clamp(3rem, 6vw, 4rem) var(--container-pad);
  }

  .card {
    padding: 1.5rem;
  }
}

/* ============================================================
   15. Smooth Scroll Behavior (extra utility)
   ============================================================ */

/* Handled via html { scroll-behavior: smooth } in base styles.
   Additional offset for sticky nav: */
[id] {
  scroll-margin-top: calc(var(--nav-height) + 1.5rem);
}

/* ============================================================
   16. Loading Animation (Fade In)
   ============================================================ */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger > .animate-on-scroll:nth-child(1)  { transition-delay: 0.05s; }
.stagger > .animate-on-scroll:nth-child(2)  { transition-delay: 0.1s; }
.stagger > .animate-on-scroll:nth-child(3)  { transition-delay: 0.15s; }
.stagger > .animate-on-scroll:nth-child(4)  { transition-delay: 0.2s; }
.stagger > .animate-on-scroll:nth-child(5)  { transition-delay: 0.25s; }
.stagger > .animate-on-scroll:nth-child(6)  { transition-delay: 0.3s; }

/* Page load fade-in */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
.fade-in-delay-3 { animation-delay: 0.35s; }
.fade-in-delay-4 { animation-delay: 0.5s; }

/* Slide from left/right */
.animate-slide-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-slide-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-slide-left.visible,
.animate-slide-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================================
   17. Separator / Divider with Blue Accent
   ============================================================ */

.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border) 20%, var(--border) 80%, transparent 100%);
  margin: 3rem 0;
  position: relative;
}

.divider--accent {
  background: linear-gradient(90deg, transparent 0%, var(--blue-dim) 30%, var(--blue) 50%, var(--blue-dim) 70%, transparent 100%);
}

.divider--center::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 7px;
  background: var(--bg);
  border-radius: 4px;
}

.divider--center::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  background: var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--blue);
}

.section-sep {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0;
}

.section-sep__line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-sep__dot {
  width: 6px;
  height: 6px;
  background: var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--blue);
}

/* ============================================================
   18. Logo Styles
   ============================================================ */

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo__mark {
  flex-shrink: 0;
}

.logo__name {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.logo__primary {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--white);
  line-height: 1;
  text-transform: uppercase;
}

.logo__sub {
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  color: var(--steel);
  line-height: 1;
}

/* Size variants */
.logo--sm .logo__primary { font-size: 0.8rem; }
.logo--lg .logo__primary { font-size: 1.3rem; }
.logo--lg .logo__mark    { height: 48px; }

/* ============================================================
   19. Tag / Badge Styles
   ============================================================ */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-head);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 2px;
  white-space: nowrap;
}

.tag--blue {
  color: var(--blue);
  background: var(--blue-glow);
  border: 1px solid rgba(58, 158, 255, 0.22);
}

.tag--steel {
  color: var(--silver);
  background: var(--surface2);
  border: 1px solid var(--border);
}

.tag--outline {
  color: var(--silver);
  background: transparent;
  border: 1px solid var(--border);
}

.tag--success {
  color: #4dd990;
  background: rgba(77, 217, 144, 0.08);
  border: 1px solid rgba(77, 217, 144, 0.2);
}

.tag--warning {
  color: #ffb547;
  background: rgba(255, 181, 71, 0.08);
  border: 1px solid rgba(255, 181, 71, 0.2);
}

.tag--danger {
  color: #e05555;
  background: rgba(224, 85, 85, 0.08);
  border: 1px solid rgba(224, 85, 85, 0.2);
}

/* Badge (pill) */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 10px;
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1;
  background: var(--blue);
  color: var(--bg);
}

.badge--steel {
  background: var(--steel);
  color: var(--white);
}

/* Tags group */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

/* ============================================================
   20. Breadcrumb
   ============================================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.3rem;
  font-size: 0.82rem;
  margin-bottom: 1.25rem;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--steel);
}

.breadcrumb__item a {
  color: var(--steel);
  transition: color var(--transition-fast);
}

.breadcrumb__item a:hover {
  color: var(--silver);
}

.breadcrumb__item--active {
  color: var(--silver);
}

.breadcrumb__sep {
  color: var(--border);
  font-size: 0.7rem;
}

/* ============================================================
   Additional Utility Classes
   ============================================================ */

/* Spacing */
.mt-0  { margin-top: 0; }
.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.5rem; }
.mt-4  { margin-top: 2rem; }
.mt-6  { margin-top: 3rem; }

.mb-0  { margin-bottom: 0; }
.mb-1  { margin-bottom: 0.5rem; }
.mb-2  { margin-bottom: 1rem; }
.mb-3  { margin-bottom: 1.5rem; }
.mb-4  { margin-bottom: 2rem; }
.mb-6  { margin-bottom: 3rem; }

/* Visibility */
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Flex utilities */
.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap-1   { gap: 0.5rem; }
.flex-gap-2   { gap: 1rem; }
.flex-gap-3   { gap: 1.5rem; }

/* Stats / Numbers */
.stat {
  text-align: center;
  padding: 1.5rem;
}

.stat__number {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.4rem;
  display: block;
}

.stat__number span {
  color: var(--blue);
}

.stat__label {
  font-size: 0.85rem;
  color: var(--silver);
  letter-spacing: 0.05em;
}

/* Notification toast (JS-controlled) */
.notification-toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: var(--z-toast);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  min-width: 300px;
  max-width: 420px;
  padding: 1rem 1.25rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  transform: translateX(120%);
  opacity: 0;
  transition: transform var(--transition), opacity var(--transition);
}

.notification-toast.show {
  transform: translateX(0);
  opacity: 1;
}

.notification-toast--success {
  border-left: 3px solid #4dd990;
}

.notification-toast--error {
  border-left: 3px solid #e05555;
}

.notification-toast--info {
  border-left: 3px solid var(--blue);
}

.notification-toast__icon {
  font-size: 1.1rem;
  line-height: 1;
  margin-top: 1px;
}

.notification-toast--success .notification-toast__icon { color: #4dd990; }
.notification-toast--error   .notification-toast__icon { color: #e05555; }
.notification-toast--info    .notification-toast__icon { color: var(--blue); }

.notification-toast__body {
  flex: 1;
}

.notification-toast__title {
  font-family: var(--font-head);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 0.25rem;
  font-weight: 700;
}

.notification-toast__message {
  font-size: 0.88rem;
  color: var(--silver);
  margin-bottom: 0;
  line-height: 1.5;
}

.notification-toast__close {
  color: var(--steel);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  background: none;
  border: none;
  transition: color var(--transition-fast);
  flex-shrink: 0;
  margin-top: 1px;
}

.notification-toast__close:hover {
  color: var(--silver);
}

/* Multiple toasts stacking */
.notification-stack {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column-reverse;
  gap: 0.75rem;
  pointer-events: none;
}

.notification-stack .notification-toast {
  position: relative;
  bottom: auto;
  right: auto;
  pointer-events: all;
}

/* Overlay / Modal backdrop */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.overlay.show {
  opacity: 1;
  pointer-events: all;
}

/* Accent line decorations */
.accent-line {
  display: block;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), transparent);
  border-radius: 2px;
  margin-bottom: 1rem;
}

.accent-line--center {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   Print Styles
   ============================================================ */

@media print {
  .nav,
  .footer__social,
  .btn,
  .notification-toast {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}