:root {
  --bg-hero: #05070a;
  --bg-main: #0e141b;
  --bg-card: #141c24;
  --bg-card-soft: #101820;

  --border: #243241;

  --text-main: #e6edf3;
  --text-muted: #9ba7b4;
  --text-soft: #c8d1dc;

  --accent-green: #3dcfe2;
  --accent-green-soft: rgba(124, 255, 178, 0.16);

  --accent-lavender: #b8b5ff;
  --accent-orange: #f5d4a2;

  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);

  --max-width: 1120px;
  --radius-lg: 24px;
  --radius-md: 16px;
}

/* Reset */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-main);
  color: var(--text-main);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.7;
}

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

p {
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

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

/* Header */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;

  width: 100%;
  height: 72px;

  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 0 32px;

  background: rgba(5, 7, 10, 0.72);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(124, 255, 178, 0.12);
}

.logo {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-main);
}

.nav {
  display: flex;
  gap: 24px;
}

.nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--accent-green);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 130px 80px 80px;
  overflow: hidden;
  background: #05070a;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -3%;
  background: url("hero-nasa.PNG") center center / cover no-repeat;
  transform: scale(1.02) translateX(0) translateY(0);
  animation: heroDrift 20s ease-in-out infinite alternate;
  z-index: 0;
  will-change: transform;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      90deg,
      rgba(5, 7, 10, 0.60) 0%,
      rgba(5, 7, 10, 0.40) 42%,
      rgba(5, 7, 10, 0.10) 100%
    ),
    radial-gradient(
      circle at 74% 24%,
      rgba(124, 255, 178, 0.10),
      transparent 24%
    ),
    radial-gradient(
      circle at 80% 78%,
      rgba(246, 160, 77, 0.08),
      transparent 26%
    ),
    linear-gradient(
      180deg,
      transparent 0%,
      rgba(14, 20, 27, 0.50) 100%
    );
  pointer-events: none;
  z-index: 1;
}

.hero-overlay,
.hero-content,
.image-credit {
  position: relative;
  z-index: 2;
}

@keyframes heroDrift {
  0% {
    transform: scale(1.02) translateX(-1.2%) translateY(0);
  }
  100% {
    transform: scale(1.08) translateX(1.2%) translateY(-0.8%);
  }
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;

  margin-bottom: 20px;

  color: var(--accent-green);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before,
.section-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent-green);
}

.hero h1 {
  max-width: 865px;

  font-size: clamp(3.2rem, 6vw, 6.2rem);
  font-weight: 800;
  color: var(--text-main);
}

.hero-text {
  max-width: 680px;
  margin-top: 28px;

  color: var(--text-soft);
  font-size: clamp(1rem, 2vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;

  margin-top: 36px;
}

.image-credit {
  position: absolute;
  right: 24px;
  bottom: 18px;
  z-index: 3;

  color: rgba(230, 237, 243, 0.56);
  font-size: 0.72rem;
}

/* Buttons */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-height: 46px;
  padding: 0 20px;

  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;

  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--accent-green);
  color: #061018;
  box-shadow: 0 0 32px rgba(124, 255, 178, 0.22);
}

.button.secondary {
  color: var(--accent-green);
  border: 1px solid rgba(124, 255, 178, 0.52);
  background: rgba(124, 255, 178, 0.06);
}

.button.secondary:hover {
  background: rgba(124, 255, 178, 0.12);
}

/* Sections */

.section {
  padding: 104px 32px;
  background: var(--bg-main);
}

.section.alt {
  background:
    linear-gradient(
      180deg,
      rgba(16, 24, 32, 0.92),
      rgba(14, 20, 27, 1)
    );
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-inner.narrow {
  max-width: 820px;
}

.section h2 {
  max-width: 820px;
  margin-bottom: 24px;

  font-size: clamp(2rem, 4vw, 3.4rem);
  color: var(--text-main);
}

.section p {
  color: var(--text-muted);
  font-size: 1rem;
}

.intro {
  position: relative;
  background:
    radial-gradient(
      circle at 18% 12%,
      rgba(124, 255, 178, 0.08),
      transparent 28%
    ),
    linear-gradient(
      180deg,
      #0e141b 0%,
      #0b1118 100%
    );
}

.intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124, 255, 178, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 255, 178, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, transparent, black 24%, transparent 100%);
  pointer-events: none;
}

.intro .section-inner {
  position: relative;
  z-index: 1;
}
/* Cards */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;

  margin-top: 36px;
}

.card {
  position: relative;

  min-height: 260px;
  padding: 28px;

  background:
    linear-gradient(
      180deg,
      rgba(20, 28, 36, 0.72),
      rgba(11, 17, 24, 0.88)
    );

  border: 1px solid rgba(124, 255, 178, 0.16);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.32);
  overflow: hidden;

  transition:
    transform 0.22s ease,
    border-color 0.22s ease,
    background 0.22s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 204, 179, 0.38);
  background:
    linear-gradient(
      180deg,
      rgba(20, 28, 36, 0.86),
      rgba(11, 17, 24, 0.96)
    );
}

.card::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -90px;

  width: 180px;
  height: 180px;

  background: radial-gradient(
    circle,
    rgba(124, 255, 178, 0.14),
    transparent 68%
  );

  pointer-events: none;
}

.card-tag {
  color: var(--accent-green);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.card h3 {
  margin-top: 24px;
  margin-bottom: 14px;
  font-size: 1.28rem;
}

.card p {
  color: var(--text-muted);
}

/* Outputs */

.output-list {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}

.output-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;

  padding: 26px;

  background:
    linear-gradient(
      135deg,
      rgba(20, 28, 36, 0.84),
      rgba(11, 17, 24, 0.92)
    );

  border: 1px solid rgba(124, 255, 178, 0.14);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.26);
}

.output-item h3 {
  margin-bottom: 8px;
  font-size: 1.12rem;
}

.output-item p {
  max-width: 760px;
}
.output-meta {
  margin-bottom: 8px;

  color: var(--accent-green);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.featured-output {
  border-color: rgba(124, 255, 178, 0.32);

  background:
    linear-gradient(
      135deg,
      rgba(124, 255, 178, 0.10),
      rgba(20, 28, 36, 0.88) 38%,
      rgba(11, 17, 24, 0.96)
    );
}

.featured-output h3 {
  font-size: 1.22rem;
}
.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: fit-content;
  min-height: 38px;
  padding: 0 16px;

  color: var(--accent-green);
  border: 1px solid rgba(124, 255, 178, 0.32);
  border-radius: 999px;

  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;

  background: rgba(124, 255, 178, 0.06);
}

.text-link::after {
  content: " →";
  margin-left: 4px;
  color: var(--accent-orange);
}


/* Timeline */

.timeline {
  position: relative;
  margin-top: 40px;

  display: grid;
  gap: 24px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 35px;
  top: 24px;
  bottom: 24px;

  width: 1px;
  background: linear-gradient(
    180deg,
    rgba(124, 255, 178, 0.5),
    rgba(124, 255, 178, 0.06)
  );
}

.timeline-item {
  position: relative;

  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 18px;

  padding: 24px;

  background:
    linear-gradient(
      135deg,
      rgba(20, 28, 36, 0.72),
      rgba(11, 17, 24, 0.88)
    );

  border: 1px solid rgba(124, 255, 178, 0.14);
  border-radius: var(--radius-md);
}

.dot {
  position: relative;
  z-index: 2;

  width: 12px;
  height: 12px;
  margin-top: 8px;

  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 24px rgba(124, 255, 178, 0.45);
}

.dot {
  width: 12px;
  height: 12px;
  margin-top: 8px;

  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 24px rgba(124, 255, 178, 0.45);
}

.timeline-item h3 {
  margin-bottom: 8px;
  font-size: 1.15rem;
}

/* Notice */

.notice-section {
  padding-top: 40px;
}

.notice {
  padding: 30px;

  border-radius: var(--radius-lg);
  border: 1px solid rgba(246, 160, 77, 0.34);

  background:
    linear-gradient(
      135deg,
      rgba(246, 160, 77, 0.10),
      rgba(124, 255, 178, 0.045)
    );

  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
}

.notice h2 {
  margin-bottom: 14px;
  font-size: 1.6rem;
  color: var(--text-main);
}

.notice p {
  color: var(--text-soft);
}

/* Contact */

.contact-section {
  text-align: left;
}

.contact-section .button {
  margin-top: 28px;
}

/* Footer */

.site-footer {
  padding: 32px;

  background: #070b10;
  border-top: 1px solid var(--border);

  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
}

.site-footer p + p {
  margin-top: 8px;
}

/* Responsive */

@media (max-width: 860px) {
  .site-header {
    padding: 0 20px;
  }

  .nav {
    display: none;
  }

  .hero {
    padding: 140px 24px 72px;
    background:
      linear-gradient(
        180deg,
        rgba(5, 7, 10, 0.96) 0%,
        rgba(5, 7, 10, 0.74) 55%,
        rgba(5, 7, 10, 0.88) 100%
      ),
      url("hero-nasa.jpg") center / cover no-repeat;
  }

  .hero h1 {
    font-size: clamp(2.6rem, 13vw, 4.8rem);
  }

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

  .output-item {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 80px 24px;
  }

  .image-credit {
    left: 24px;
    right: auto;
  }
}

@media (max-width: 520px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .section h2 {
    font-size: 2rem;
  }
}
.output-item .text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: fit-content;
  min-height: 38px;
  padding: 0 16px;

  color: var(--accent-green);
  border: 1px solid rgba(124, 255, 178, 0.32);
  border-radius: 999px;

  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;

  background: rgba(124, 255, 178, 0.06);
}

.output-item .text-link::after {
  content: " →";
  margin-left: 4px;
  color: var(--accent-orange);
}
/* =========================
   Mobile Responsive
   ========================= */

@media (max-width: 860px) {
  .site-header {
    height: 64px;
    padding: 0 20px;
  }

  .logo {
    font-size: 0.82rem;
    letter-spacing: 0.06em;
  }

  .nav {
    display: none;
  }

  .hero {
    min-height: 100svh;
    padding: 120px 24px 72px;
    align-items: center;
  }

  .hero::before {
    animation: none;
    transform: scale(1.04);
    background-position: center center;
  }

  .hero::after {
    background:
      linear-gradient(
        180deg,
        rgba(5, 7, 10, 0.72) 0%,
        rgba(5, 7, 10, 0.42) 42%,
        rgba(5, 7, 10, 0.88) 100%
      ),
      radial-gradient(
        circle at 70% 22%,
        rgba(124, 255, 178, 0.10),
        transparent 28%
      ),
      linear-gradient(
        180deg,
        transparent 0%,
        rgba(14, 20, 27, 0.72) 100%
      );
  }

  .hero-overlay {
    background-size: 40px 40px;
    opacity: 0.75;
  }

  .hero-content {
    padding-left: 0;
  }

  .eyebrow,
  .section-kicker {
    margin-bottom: 16px;
    font-size: 0.7rem;
    letter-spacing: 0.13em;
  }

  .eyebrow::before,
  .section-kicker::before {
    width: 22px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(2.45rem, 12vw, 4.2rem);
    line-height: 1.05;
  }

  .hero-text {
    max-width: 100%;
    margin-top: 24px;
    font-size: 0.98rem;
    line-height: 1.75;
  }

  .hero-actions {
    margin-top: 32px;
    gap: 12px;
  }

  .image-credit {
    left: 24px;
    right: auto;
    bottom: 16px;
    max-width: calc(100% - 48px);
    font-size: 0.66rem;
  }

  .section {
    padding: 80px 24px;
  }

  .section h2 {
    margin-bottom: 20px;
    font-size: clamp(1.9rem, 8vw, 2.7rem);
    line-height: 1.18;
  }

  .section p {
    font-size: 0.96rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 32px;
  }

  .card {
    min-height: auto;
    padding: 24px;
  }

  .output-list {
    gap: 16px;
  }

  .output-item {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 22px;
  }

  .output-item h3 {
    font-size: 1.05rem;
    line-height: 1.25;
  }

  .text-link {
    width: fit-content;
  }

  .timeline {
    gap: 18px;
  }

  .timeline::before {
    left: 33px;
  }

  .timeline-item {
    grid-template-columns: 20px 1fr;
    gap: 16px;
    padding: 22px;
  }

  .notice {
    padding: 24px;
  }

  .contact-section .button {
    width: fit-content;
    max-width: 100%;
  }

  .site-footer {
    padding: 28px 24px;
    font-size: 0.74rem;
  }
}

@media (max-width: 520px) {
  .hero {
    padding: 112px 20px 72px;
  }

  .hero h1 {
    font-size: clamp(2.2rem, 13vw, 3.4rem);
  }

  .hero-text {
    font-size: 0.94rem;
  }

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

  .button {
    width: 100%;
    min-height: 48px;
  }

  .section {
    padding: 72px 20px;
  }

  .section h2 {
    font-size: 1.9rem;
  }

  .output-item {
    padding: 20px;
  }

  .text-link {
    width: 100%;
  }

  .contact-section .button {
    width: 100%;
  }

  .image-credit {
    left: 20px;
    max-width: calc(100% - 40px);
  }
}