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

:root {
  --color-bg-deep: #1e2226;
  --color-bg-gradient-start: #252a30;
  --color-bg-gradient-end: #1e2226;
  --color-text-primary: #f0f0f5;
  --color-text-secondary: #dddddd;
  --color-text-strong: #ffffff;
  --color-text-muted: #bbbbdd;
  --color-highlight: #ffd700;
  --color-panel: #343b44;
  --color-card: #2c333a;
  --color-card-secondary: #333b42;
  --color-link: #8fb8ff;
  --color-panel-text: #1a1e26;
}

html {
  background: var(--color-bg-deep);
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body {
  background: linear-gradient(120deg, var(--color-bg-gradient-start) 0%, var(--color-bg-gradient-end) 100%);
  color: var(--color-text-primary);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.45;
  overflow-x: hidden;
}

main {
  padding-top: 180px;

  footer small {
    color: rgba(255, 255, 255, 0.6);
  }
}

header {
  background: rgba(217, 217, 217, 0.03);
  display: flex;
  justify-content: center;
  padding: 10px 0 8px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
}

header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, #29313d 6%, #575946 25%, #283846 44%);
  opacity: 0.9;
}

.header-inner {
  width: min(1250px, calc(100% - 4vw));
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 2.5rem);
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 4px;
  padding-left: 16px;
  padding-bottom: 10px;
  margin-right: clamp(20px, 3vw, 48px);
}

.logo-svg {
  width: clamp(140px, 14vw, 140px);
  height: auto;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(24px, 3vw, 64px);
  margin-left: clamp(36px, 6vw, 120px);
}

nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  transition: color 0.25s;
}

nav a:hover {
  color: var(--color-text-strong);
}

.has-js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
  will-change: opacity, transform;
}

.has-js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .has-js .reveal,
  .has-js .reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── HERO ── */

.hero {
  width: min(1240px, calc(100% - 4vw));
  margin: clamp(8px, 3vw, 36px) auto clamp(32px, 6vw, 64px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 60vh;
  padding: clamp(26px, 4vw, 80px) clamp(6px, 1.6vw, 24px);
  align-items: center;
  position: relative;
  gap: 1.8rem;
}

.hero-left {
  padding-bottom: 3vh;
  padding-left: 3vw;
}

h1 {
  font-size: clamp(2.5rem, 6.8vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.92;
  margin-bottom: 1.5rem;
}

.highlight {
  color: var(--color-highlight);
  position: relative;
  display: inline-block;
}

.subtitle {
  font-size: clamp(1.1rem, 2.8vw, 1.6rem);
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 620px;
  opacity: 0.92;
  line-height: 1.35;
}

/* Right side - your SVG illustration */

.anchor {
  margin: -10px 0 10px 0;
}

.hero-right {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-svg {
  width: 80%;
  max-width: 420px;
  height: auto;
  object-fit: contain;
}

.concept-panel {
  margin-top: clamp(48px, 9vw, 90px);
  background: var(--color-panel);
  border-radius: 48px 48px 0 0;
  padding: clamp(32px, 6vw, 72px) 0 0;
  color: var(--color-panel-text);
  box-shadow: 0 -20px 60px rgba(0, 0, 0, 0.25);
}

.concept-shell {
  width: min(1100px, calc(100% - 12vw));
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: clamp(32px, 6vw, 42px);
}

.content-block {
  background: var(--color-card);
  border-radius: 32px;
  border: 1px solid rgba(16, 16, 16, 0.05);
  padding: clamp(28px, 4vw, 48px);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  color: #f4f7ff;
}

.content-block-secondary {
  background: var(--color-card-secondary);
  border-radius: 12px;
}

.concept-feature {
  min-height: clamp(220px, 38vw, 420px);
}

.mission-panel p,
.contact-panel p {
  color: rgba(244, 247, 255, 0.88);
  font-size: 1.1rem;
  line-height: 1.85;
}

.panel-heading {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
  margin-bottom: 1rem;
}

.panel-heading h2,
.contact-panel h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
}

.panel-icon {
  width: 64px;
  height: 64px;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 3vw, 32px);
}

.concept-card {
  min-height: clamp(140px, 22vw, 220px);
}

.concept-card {
  padding: clamp(24px, 4vw, 40px);
  gap: 0.9rem;
  position: relative;
  overflow: visible;
}

.card-icon {
  width: 64px;
  height: 60px;
  display: block;
  margin: 16px auto 0;
  transform: translateY(-30%);
}

.concept-card:first-child .card-icon {
  width: 100px;
  height: 60px;
}

.concept-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
}

.concept-card p {
  color: rgba(244, 247, 255, 0.75);
  line-height: 1.8;
  font-size: 1.1rem;
}

.contact-panel {
  gap: 0.8rem;
}

.contact-email {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.contact-email span {
  color: rgba(244, 247, 255, 0.9);
}

.contact-email-link {
  color: var(--color-link);
  text-decoration: none;
  font-weight: 600;
}

.contact-email-link:hover {
  text-decoration: underline;
}

.copy-email-btn {
  border: none;
  background: transparent;
  color: var(--color-text-strong);
  padding: 0.2rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.copy-email-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 5px;
}

.copy-email-btn:active {
  transform: scale(0.95);
}

.copy-email-btn.copied {
  background: rgba(143, 184, 255, 0.3);
}

.copy-email-icon {
  width: 22px;
  height: 22px;
  filter: brightness(0) invert(1);
}

.copy-feedback {
  min-width: 60px;
  font-size: 0.85rem;
  color: var(--color-link);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.copy-feedback.is-visible {
  opacity: 1;
}

.concept-brand {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: clamp(16px, 4vw, 32px);
}

.concept-logo {
  width: 180px;
  height: auto;
}

footer {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  background-color: var(--color-card);
  color: var(--color-text-secondary);
  padding: clamp(36px, 6vw, 80px) 5vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  bottom: 0;
}

footer p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 1100px) and (min-width: 901px) {
  nav {
    margin-left: clamp(40px, 10vw, 160px);
  }

  .hero {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    grid-template-columns: 1fr 1fr;
    padding-top: clamp(10px, 2vw, 20px);
    padding-bottom: clamp(12px, 2.4vw, 28px);
    padding-left: clamp(14px, 4vw, 28px);
    padding-right: clamp(14px, 4vw, 28px);
    gap: 1.6rem;
  }

  h1 {
    font-size: clamp(2.2rem, 5.6vw, 4.4rem);
  }

  .subtitle {
    font-size: clamp(1rem, 2.2vw, 1.3rem);
  }

  .hero-svg {
    max-width: 320px;
  }
}

@media (max-width: 900px) {
  .hero {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    grid-template-columns: 1fr;
    padding-top: clamp(12px, 2.5vw, 28px);
    padding-left: clamp(14px, 4vw, 28px);
    padding-right: clamp(14px, 4vw, 28px);
    justify-items: center;
    gap: 2.5rem;
  }

  .hero-left {
    padding-left: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 640px;
    width: 100%;
    margin: 0 auto;
  }

  .hero-left .subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-right {
    order: 2;
    margin-bottom: 0;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-svg {
    max-width: 320px;
    margin: 0 auto;
  }
}

@media (max-width: 680px) {

  .logo {
    margin-left: 0;
  }

  nav {
    display: none;
  }

  header {
    padding: 18px 0;
  }

  .header-inner {
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
    padding: 0 6vw;
  }

  nav {
    margin-left: 0;
    gap: 1.25rem;
  }

  nav a {
    font-size: 0.95rem;
  }

  h1 {
    font-size: 3.2rem;
  }

  .subtitle {
    font-size: 1.3rem;
  }

  .concept-panel {
    border-radius: 32px 32px 0 0;
  }

  .concept-shell {
    width: min(640px, calc(100% - 12vw));
  }

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