/* ==========================================================================
   IMPULSIA OÜ — CORPORATE STYLESHEET
   Aesthetic: Architectural, Editorial, Discretely Prestigious, High-Precision
   Exact replication of reference: Impulsia Innovation Consulting Homepage
   ========================================================================== */

/* --- Custom Properties / Design Tokens --- */
:root {
  --color-black: #0B0F12;
  --color-graphite: #151B20;
  --color-warm-offwhite: #EAE7DF;
  --color-paper: #EFEBE6;
  --color-paper-light: #EFEBE6;
  --color-cool-gray: #A8B1B8;
  --color-dim-gray: #7D878E;
  --color-deep-slate: #243746;
  --color-white: #FFFFFF;
  --color-accent-amber: #D1B496;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --ease-architectural: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);

  --header-height: 96px;
  --site-max-width: 1160px;
}

/* --- Global Reset & Box Sizing --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--color-black);
  color: var(--color-warm-offwhite);
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.6;
  background-color: var(--color-black);
  color: var(--color-warm-offwhite);
  overflow-x: hidden;
  position: relative;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

:focus-visible {
  outline: 1px solid var(--color-warm-offwhite);
  outline-offset: 4px;
}

/* ==========================================================================
   00 — HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 42px 0 20px 0;
  transition: padding 0.4s var(--ease-smooth), background-color 0.4s var(--ease-smooth), backdrop-filter 0.4s var(--ease-smooth);
}

.site-header.scrolled {
  position: fixed;
  padding: 18px 0;
  background-color: rgba(11, 15, 18, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-container {
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  transition: opacity 0.3s ease;
}

.brand-link:hover {
  opacity: 0.95;
}

.brand-logo-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
  overflow: hidden;
  border-radius: 2px;
}

.brand-logo {
  width: 146px;
  height: auto;
  aspect-ratio: 1932 / 814;
  object-fit: contain;
  filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.5));
  display: block;
}

/* Specular Sheen (Refined metallic light reflection sweeping across the flowing arch) */
.logo-sheen {
  position: absolute;
  inset: 0;
  pointer-events: none;
  -webkit-mask-image: url('../img/Metallic%20Flowing%20Arch%20Logo.png');
  mask-image: url('../img/Metallic%20Flowing%20Arch%20Logo.png');
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 0.3s ease;
  overflow: hidden;
}

.logo-sheen::after {
  content: '';
  position: absolute;
  top: -60%;
  left: -80%;
  width: 55%;
  height: 220%;
  background: linear-gradient(
    110deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.2) 25%,
    rgba(255, 255, 255, 0.95) 50%,
    rgba(255, 255, 255, 0.3) 70%,
    rgba(255, 255, 255, 0) 100%
  );
  filter: blur(1.5px) drop-shadow(0 0 10px rgba(255, 255, 255, 0.9));
  transform: rotate(20deg);
  will-change: transform;
}

.brand-logo-wrapper.animate-sheen .logo-sheen {
  opacity: 1;
}

.brand-logo-wrapper.animate-sheen .logo-sheen::after {
  animation: logoSpecularSheen 1.35s cubic-bezier(0.2, 0.8, 0.25, 1) forwards;
}

.brand-link:hover .brand-logo-wrapper .logo-sheen {
  opacity: 1;
}

.brand-link:hover .brand-logo-wrapper .logo-sheen::after {
  animation: logoSpecularSheen 1.1s cubic-bezier(0.2, 0.8, 0.25, 1) forwards;
}

@keyframes logoSpecularSheen {
  0% {
    transform: translateX(-140%) rotate(20deg);
  }
  100% {
    transform: translateX(380%) rotate(20deg);
  }
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 44px;
  align-items: center;
}

.nav-link {
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: rgba(234, 231, 223, 0.72);
  transition: color 0.3s ease, letter-spacing 0.3s ease;
  position: relative;
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1px;
  background-color: var(--color-warm-offwhite);
  transition: width 0.3s var(--ease-architectural);
}

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

.nav-link:hover::after {
  width: 100%;
}

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

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.hero-backdrop-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% center;
  transform: scale(1.02);
  transition: transform 1.2s var(--ease-architectural);
  will-change: transform;
}

.hero-overlay-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(11, 15, 18, 0.96) 0%,
    rgba(11, 15, 18, 0.90) 32%,
    rgba(11, 15, 18, 0.65) 54%,
    rgba(11, 15, 18, 0.18) 76%,
    rgba(11, 15, 18, 0.0) 100%
  );
}

/* Architectural Lines Overlay (Prominent, High-Precision) */
.hero-architectural-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}

.axis-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 64%;
  width: 1.2px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.20) 0%,
    rgba(255, 255, 255, 0.65) 30%,
    rgba(255, 255, 255, 0.45) 70%,
    rgba(255, 255, 255, 0.10) 100%
  );
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.35);
}

.trajectory-arc {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.75)) drop-shadow(0 0 5px rgba(255, 255, 255, 0.5));
}

.trajectory-arc path {
  vector-effect: non-scaling-stroke;
  stroke: rgba(255, 255, 255, 0.9);
  stroke-width: 1.5;
}

.hero-container {
  position: relative;
  z-index: 4;
  width: 100%;
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: calc(var(--header-height) + 40px) 54px 50px 54px;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-content {
  max-width: 640px;
}

.hero-identity {
  margin-bottom: 56px;
}

.brand-wordmark {
  font-size: clamp(42px, 5.2vw, 64px);
  font-weight: 300;
  letter-spacing: 0.28em;
  color: var(--color-white);
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 14px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.brand-tagline {
  font-size: clamp(10.5px, 1.05vw, 12px);
  font-weight: 400;
  letter-spacing: 0.26em;
  color: rgba(234, 231, 223, 0.72);
  text-transform: uppercase;
}

.hero-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 600px;
}

.hero-column {
  display: flex;
  flex-direction: column;
}

.column-title {
  font-size: clamp(23px, 2.3vw, 30px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.column-separator {
  width: 36px;
  height: 1px;
  background-color: rgba(234, 231, 223, 0.35);
  margin: 18px 0 18px 0;
}

.column-description {
  font-size: 13.5px;
  font-weight: 300;
  line-height: 1.65;
  color: rgba(234, 231, 223, 0.72);
}

/* Trajectory List on Horizon (Refined Architectural Typography) */
.hero-trajectory-list {
  position: absolute;
  right: 74px;
  bottom: 116px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  text-align: right;
  z-index: 10;
  pointer-events: auto;
}

.hero-trajectory-list span {
  font-size: clamp(9.5px, 0.82vw, 11px);
  font-weight: 400;
  letter-spacing: 0.24em;
  color: #FFFFFF;
  display: block;
  text-shadow: 
    0 1px 2px rgba(0, 0, 0, 0.95),
    0 2px 6px rgba(0, 0, 0, 0.85);
  transition: color 0.3s ease, transform 0.3s var(--ease-architectural), text-shadow 0.3s ease, opacity 0.3s ease;
  opacity: 1;
  cursor: default;
}

.hero-trajectory-list span:hover {
  opacity: 1;
  color: var(--color-warm-offwhite);
  transform: translateX(-3px);
  text-shadow: 
    0 0 8px rgba(255, 255, 255, 0.7),
    0 2px 6px rgba(0, 0, 0, 0.95);
}

/* Scroll Cue (Bottom-left) */
.hero-scroll-cue {
  position: absolute;
  bottom: 44px;
  left: 54px;
}

.scroll-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  color: rgba(234, 231, 223, 0.65);
  transition: color 0.3s ease, transform 0.3s ease;
}

.scroll-arrow {
  font-size: 14px;
  line-height: 1;
  display: inline-block;
  transition: transform 0.3s var(--ease-architectural);
}

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

.scroll-link:hover .scroll-arrow {
  transform: translateY(3px);
}

/* ==========================================================================
   02 — EXPERTISE SECTION
   ========================================================================== */
.expertise-section {
  position: relative;
  background-color: var(--color-paper-light);
  color: var(--color-black);
  padding: 110px 0 130px 0;
  z-index: 10;
}

.expertise-container {
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 54px;
}

.expertise-header {
  margin-bottom: 64px;
}

.kicker-group {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 24px;
}

.kicker-label {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.24em;
  color: var(--color-dim-gray);
  text-transform: uppercase;
}

.kicker-line {
  width: 140px;
  height: 1px;
  background-color: rgba(11, 15, 18, 0.22);
}

.expertise-header-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: flex-start;
}

.expertise-heading {
  font-size: clamp(34px, 4.2vw, 50px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

.expertise-intro-wrapper {
  padding-top: 6px;
}

.expertise-intro {
  font-size: 14.5px;
  font-weight: 300;
  line-height: 1.7;
  color: #4A535A;
  max-width: 440px;
}

/* Plates / Panels Grid */
.plates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.plate-card {
  background-color: var(--color-graphite);
  color: var(--color-warm-offwhite);
  border: none;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: transform 0.6s var(--ease-architectural), box-shadow 0.6s var(--ease-architectural);
}

.plate-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(11, 15, 18, 0.14);
}

.plate-image-container {
  position: relative;
  width: 100%;
  aspect-ratio: 282 / 165;
  overflow: hidden;
  background-color: var(--color-black);
}

.plate-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--ease-architectural);
  filter: brightness(0.96) contrast(1.02);
}

.plate-card:hover .plate-image {
  transform: scale(1.04);
}

/* Trajectory Arc on Plate 02 */
.plate-trajectory-arc {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.plate-trajectory-arc path {
  vector-effect: non-scaling-stroke;
}

.plate-number {
  position: absolute;
  top: 20px;
  left: 22px;
  font-size: 24px;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--color-white);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

.plate-content {
  padding: 30px 26px 34px 26px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.plate-accent-line {
  width: 36px;
  height: 1px;
  background-color: rgba(234, 231, 223, 0.35);
  margin-bottom: 22px;
}

.plate-title {
  font-size: clamp(19px, 1.8vw, 21px);
  font-weight: 400;
  line-height: 1.25;
  color: var(--color-warm-offwhite);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.plate-description {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.62;
  color: var(--color-cool-gray);
}

/* ==========================================================================
   03 — FOOTER / CONTACT SECTION
   ========================================================================== */
.footer-section {
  position: relative;
  background-color: var(--color-black);
  color: var(--color-warm-offwhite);
  padding: 85px 0 80px 0;
  overflow: hidden;
  z-index: 10;
}

.footer-backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.footer-backdrop-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 78% bottom;
  opacity: 0.88;
}

.footer-overlay-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(11, 15, 18, 0.98) 0%,
    rgba(11, 15, 18, 0.94) 28%,
    rgba(11, 15, 18, 0.65) 54%,
    rgba(11, 15, 18, 0.15) 80%,
    rgba(11, 15, 18, 0.05) 100%
  );
}

.footer-container {
  position: relative;
  z-index: 2;
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 54px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1.2fr;
  align-items: center;
  gap: 36px;
}

/* Left Column */
.footer-col-left {
  display: flex;
  flex-direction: column;
}

.entity-name {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--color-warm-offwhite);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.entity-address,
.entity-registry {
  font-size: 12.5px;
  font-weight: 300;
  color: var(--color-cool-gray);
  line-height: 1.6;
}

.footer-line {
  width: 28px;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.22);
  margin-top: 22px;
}

/* Center Column */
.footer-col-center {
  text-align: center;
}

.contact-email {
  display: inline-block;
  font-size: clamp(24px, 2.9vw, 36px);
  font-weight: 300;
  color: var(--color-warm-offwhite);
  letter-spacing: -0.01em;
  transition: color 0.3s ease, transform 0.3s var(--ease-architectural);
  position: relative;
  cursor: pointer;
}

.contact-email::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 1px;
  background-color: var(--color-warm-offwhite);
  transition: width 0.4s var(--ease-architectural);
}

.contact-email:hover {
  color: var(--color-white);
  transform: translateY(-1px);
}

.contact-email:hover::after {
  width: 100%;
}

/* Elegant, Highly Noticeable Feedback Badge: Copied to clipboard */
.copy-badge {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #FFFFFF;
  background: rgba(14, 18, 22, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 8px 18px;
  border: 1px solid rgba(234, 231, 223, 0.35);
  border-radius: 3px;
  box-shadow: 
    0 12px 32px rgba(0, 0, 0, 0.65),
    0 2px 8px rgba(0, 0, 0, 0.5);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--ease-architectural), transform 0.35s var(--ease-architectural), visibility 0.35s;
  z-index: 40;
}

.copy-badge-check {
  color: var(--color-warm-offwhite);
  flex-shrink: 0;
}

.copy-badge.visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Right Column */
.footer-col-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.footer-legal-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.legal-link-btn {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-cool-gray);
  letter-spacing: 0.04em;
  transition: color 0.3s ease;
  padding: 4px 0;
}

.legal-link-btn:hover {
  color: var(--color-white);
}

.legal-divider-line {
  width: 240px;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.14);
  margin: 16px 0;
}

.footer-copyright {
  font-size: 12px;
  font-weight: 300;
  color: var(--color-dim-gray);
  letter-spacing: 0.04em;
}

/* ==========================================================================
   EDITORIAL DIALOGS / MODALS
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: rgba(11, 15, 18, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--ease-smooth), visibility 0.4s var(--ease-smooth);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: var(--color-graphite);
  color: var(--color-warm-offwhite);
  border: 1px solid rgba(255, 255, 255, 0.1);
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
  transform: translateY(20px);
  transition: transform 0.4s var(--ease-architectural);
}

.modal-backdrop.active .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  padding: 32px 36px 20px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.modal-title {
  font-size: 20px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-warm-offwhite);
}

.modal-close-btn {
  font-size: 18px;
  color: var(--color-cool-gray);
  padding: 6px;
  line-height: 1;
  transition: color 0.2s ease, transform 0.2s ease;
}

.modal-close-btn:hover {
  color: var(--color-white);
  transform: scale(1.1);
}

.modal-body {
  padding: 32px 36px;
  overflow-y: auto;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-cool-gray);
}

.modal-body h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-warm-offwhite);
  margin-top: 24px;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.modal-body h3:first-child {
  margin-top: 0;
}

.modal-body p {
  margin-bottom: 16px;
}

.modal-footer {
  padding: 20px 36px 28px 36px;
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.modal-dismiss-btn {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-warm-offwhite);
  padding: 10px 24px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.modal-dismiss-btn:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--color-warm-offwhite);
}

/* ==========================================================================
   SCROLL REVEALS & SUBTLE ANIMATIONS
   ========================================================================== */
.reveal-item {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s var(--ease-architectural), transform 0.9s var(--ease-architectural);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   RESPONSIVE LAYOUT BREAKPOINTS
   ========================================================================== */

/* Tablet (768px – 860px) */
@media (max-width: 860px) {
  .header-container {
    padding: 0 32px;
  }

  .hero-container {
    padding: calc(var(--header-height) + 20px) 32px 50px 32px;
  }

  .hero-trajectory-list {
    display: none;
  }

  .expertise-container {
    padding: 0 32px;
  }

  .expertise-header-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .plates-grid {
    gap: 20px;
  }

  .plate-content {
    padding: 28px 22px 32px 22px;
  }

  .footer-container {
    padding: 0 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-col-center {
    grid-column: 1 / -1;
    order: -1;
    text-align: left;
  }

  .footer-col-right {
    align-items: flex-start;
    text-align: left;
  }

  .legal-divider-line {
    width: 100%;
  }
}

/* Mobile Screens (320px – 767px) — Premium Editorial Refinement */
@media (max-width: 767px) {
  :root {
    --header-height: 72px;
  }

  .site-header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 24px 0 16px 0;
    background-color: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: none;
  }

  .site-header.scrolled {
    position: fixed;
    padding: 14px 0;
    background-color: rgba(11, 15, 18, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .header-container {
    padding: 0 20px;
    width: 100%;
  }

  .brand-logo {
    width: 96px;
  }

  .nav-list {
    gap: 12px;
  }

  .nav-link {
    font-size: 9.5px;
    letter-spacing: 0.12em;
    padding: 4px 0;
  }

  .hero-section {
    min-height: 100svh;
  }

  .hero-container {
    padding: calc(var(--header-height) + 28px) 20px 40px 20px;
    justify-content: flex-end;
  }

  .hero-backdrop-img {
    object-position: 70% center;
    filter: brightness(0.92);
  }

  .hero-overlay-gradient {
    background: linear-gradient(
      180deg,
      rgba(11, 15, 18, 0.55) 0%,
      rgba(11, 15, 18, 0.72) 35%,
      rgba(11, 15, 18, 0.94) 75%,
      rgba(11, 15, 18, 0.98) 100%
    );
  }

  .axis-line,
  .trajectory-arc {
    display: none;
  }

  .hero-trajectory-list {
    display: none;
  }

  .hero-identity {
    margin-bottom: 38px;
  }

  .brand-wordmark {
    font-size: clamp(34px, 9vw, 44px);
    letter-spacing: 0.22em;
    margin-bottom: 12px;
  }

  .brand-tagline {
    font-size: 9.5px;
    letter-spacing: 0.22em;
  }

  .hero-columns {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 36px;
  }

  .column-title {
    font-size: 21px;
    font-weight: 300;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
  }

  .column-separator {
    display: block;
    width: 24px;
    height: 1px;
    background-color: rgba(234, 231, 223, 0.3);
    margin: 10px 0 12px 0;
  }

  .column-description {
    font-size: 13px;
    line-height: 1.6;
    color: rgba(234, 231, 223, 0.78);
  }

  .hero-scroll-cue {
    position: static;
    margin-top: 0;
  }

  .scroll-link {
    font-size: 10px;
    letter-spacing: 0.18em;
  }

  /* 02 — EXPERTISE (Mobile) */
  .expertise-section {
    padding: 72px 0 90px 0;
  }

  .expertise-container {
    padding: 0 24px;
  }

  .expertise-header {
    margin-bottom: 40px;
  }

  .expertise-heading {
    font-size: clamp(26px, 7vw, 32px);
    line-height: 1.2;
    letter-spacing: -0.02em;
  }

  .expertise-lead-in {
    font-size: 14px;
    line-height: 1.65;
  }

  .plates-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .plate-card {
    border-radius: 2px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
  }

  .plate-image-container {
    aspect-ratio: 16 / 11;
    min-height: auto;
  }

  .plate-content {
    padding: 24px 22px 28px 22px;
  }

  .plate-title {
    font-size: 20px;
    line-height: 1.25;
  }

  .plate-description {
    font-size: 13.5px;
    line-height: 1.6;
  }

  /* 03 — FOOTER (Mobile) */
  .footer-section {
    padding: 72px 0 48px 0;
  }

  .footer-container {
    padding: 0 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-col-left {
    order: 2;
  }

  .footer-col-center {
    order: 1;
    margin-bottom: 8px;
  }

  .footer-col-right {
    order: 3;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .contact-email {
    font-size: clamp(21px, 6vw, 26px);
  }

  .copy-badge {
    top: calc(100% + 12px);
    font-size: 10px;
    padding: 6px 14px;
  }

  .footer-legal-links {
    gap: 24px;
  }

  .legal-divider-line {
    display: none;
  }

  .modal-dialog {
    max-height: 90vh;
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 20px;
    padding-right: 20px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal-item {
    opacity: 1 !important;
    transform: none !important;
  }
}