/* =========================================================
   EDFS – ESA Φ-lab Project Site
   Theme: Dark navy + ESA orange accent
   ========================================================= */

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

:root {
  --navy-900: #050b18;
  --navy-800: #0a1628;
  --navy-700: #0f2044;
  --navy-600: #162a58;
  --navy-500: #1e3a6e;
  --navy-400: #2a5298;

  --orange:     #e8621a;
  --orange-lt:  #f57c3a;
  --orange-dim: #c04e12;

  --white:   #f0f4ff;
  --grey-lt: #a8b8d0;
  --grey-md: #5a6f8c;
  --grey-dk: #2e3f58;

  --font-sans: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius: 6px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.45);
  --transition: 0.25s ease;
  --max-w: 1100px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--navy-900);
  color: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--orange-lt); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--white); }

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

/* --- Typography ------------------------------------------ */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--white);
  margin-bottom: 1.25rem;
}

.section-title span { color: var(--orange); }

/* --- Layout helpers -------------------------------------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 5rem 0; }
section:nth-child(even) { background: var(--navy-800); }

/* =========================================================
   NAVIGATION
   ========================================================= */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(5, 11, 24, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(232, 98, 26, 0.18);
  transition: background var(--transition);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: -0.01em;
}

.nav-logo .logo-accent { color: var(--orange); }

.nav-logo .logo-badge {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy-900);
  background: var(--orange);
  padding: 2px 6px;
  border-radius: 3px;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--grey-lt);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--orange-lt); }

.nav-links a {
  position: relative;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.nav-links a.active {
  color: var(--white);
  border-color: rgba(232, 98, 26, 0.45);
  background: rgba(232, 98, 26, 0.08);
}

/* Mobile nav */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--white); margin: 5px 0;
  transition: var(--transition);
}

@media (max-width: 700px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--navy-800);
    border-bottom: 1px solid var(--grey-dk);
  }
  .nav-links.open { display: flex; }
  .nav-links li { border-bottom: 1px solid var(--grey-dk); }
  .nav-links a { display: block; padding: 0.9rem 1.5rem; }
}

/* =========================================================
   HERO
   ========================================================= */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 0;
  background: var(--navy-900);
}

/* Star field canvas */
#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Radial glow */
#hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(ellipse at center,
    rgba(232, 98, 26, 0.12) 0%,
    rgba(30, 58, 110, 0.18) 40%,
    transparent 70%);
  pointer-events: none;
  z-index: 1;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 8rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
  border: 1px solid rgba(232, 98, 26, 0.35);
  border-radius: 100px;
  padding: 5px 14px;
  margin-bottom: 1.5rem;
}

.hero-tag::before {
  content: '';
  width: 7px; height: 7px;
  background: var(--orange);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--orange);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  color: var(--white);
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}

.hero-title .accent { color: var(--orange); }

.hero-project-title {
  font-size: 0.9rem;
  font-style: italic;
  color: rgba(180, 195, 220, 0.7);
  font-weight: 400;
  margin-top: -0.25rem;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--grey-lt);
  max-width: 480px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--orange);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--orange-lt);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232, 98, 26, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--grey-lt);
  border: 1px solid var(--grey-dk);
}
.btn-outline:hover {
  border-color: var(--orange);
  color: var(--white);
  transform: translateY(-2px);
}

/* Hero right: info card */
.hero-card {
  background: rgba(10, 22, 40, 0.7);
  border: 1px solid rgba(232, 98, 26, 0.22);
  border-radius: 12px;
  padding: 2rem;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
}

.hero-card-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 1.2rem;
}

.info-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--grey-dk);
}
.info-row:last-child { border-bottom: none; }

.info-icon {
  width: 32px; height: 32px;
  background: rgba(232, 98, 26, 0.12);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}

.info-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey-md);
  margin-bottom: 2px;
}

.info-value {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--white);
}

.info-country { color: var(--grey-md); }

.info-value code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--orange-lt);
}

/* Hero scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--grey-md);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounce 2s ease infinite;
}

.scroll-arrow {
  width: 24px; height: 24px;
  border-right: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  transform: rotate(45deg);
  opacity: 0.6;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

@media (max-width: 820px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-card { max-width: 480px; }
}

/* =========================================================
   SUMMARY
   ========================================================= */
#summary .container { max-width: var(--max-w); }

.summary-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3.5rem;
  align-items: start;
}

.summary-text p {
  color: var(--grey-lt);
  margin-bottom: 1.1rem;
  font-size: 1.02rem;
}

.highlight-block {
  background: linear-gradient(135deg, rgba(232, 98, 26, 0.1), rgba(30, 58, 110, 0.25));
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.4rem;
  margin-top: 1.5rem;
  color: var(--grey-lt);
  font-style: italic;
  font-size: 0.95rem;
}

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

.stat-card {
  background: var(--navy-700);
  border: 1px solid var(--grey-dk);
  border-radius: var(--radius);
  padding: 1.2rem;
  transition: border-color var(--transition), transform var(--transition);
}

.stat-card:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-desc {
  font-size: 0.8rem;
  color: var(--grey-lt);
  line-height: 1.4;
}

@media (max-width: 700px) {
  .summary-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   BACKGROUND
   ========================================================= */
#background { background: var(--navy-800); }

.background-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2.5rem;
}

.bg-card {
  background: var(--navy-700);
  border: 1px solid var(--grey-dk);
  border-radius: 10px;
  padding: 1.8rem;
  transition: border-color var(--transition);
}
.bg-card:hover { border-color: rgba(232, 98, 26, 0.4); }

.bg-card-icon {
  font-size: 1.8rem;
  margin-bottom: 0.9rem;
}

.bg-card h3 {
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 0.75rem;
}

.bg-card p {
  color: var(--grey-lt);
  font-size: 0.9rem;
  line-height: 1.65;
}

.bg-intro {
  color: var(--grey-lt);
  font-size: 1rem;
  max-width: 720px;
  line-height: 1.7;
  margin-bottom: 2rem;
}

@media (max-width: 700px) {
  .background-content { grid-template-columns: 1fr; }
}

/* =========================================================
   OBJECTIVES
   ========================================================= */
#objectives { background: var(--navy-900); }

.objectives-intro {
  color: var(--grey-lt);
  font-size: 1rem;
  max-width: 720px;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.objectives-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.obj-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
  background: var(--navy-800);
  border: 1px solid var(--grey-dk);
  border-radius: 10px;
  padding: 1.4rem 1.6rem;
  transition: border-color var(--transition), background var(--transition);
}

.obj-item:hover {
  border-color: rgba(232, 98, 26, 0.4);
  background: rgba(22, 42, 88, 0.7);
}

.obj-num {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--orange);
  background: rgba(232, 98, 26, 0.12);
  border: 1px solid rgba(232, 98, 26, 0.3);
  border-radius: 4px;
  padding: 4px 8px;
  margin-top: 3px;
  white-space: nowrap;
}

.obj-text h3 {
  font-size: 0.98rem;
  color: var(--white);
  margin-bottom: 0.4rem;
}

.obj-text p {
  font-size: 0.88rem;
  color: var(--grey-lt);
  line-height: 1.6;
}

/* =========================================================
   NEWS
   ========================================================= */
#news { background: var(--navy-800); }

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.news-card {
  background: var(--navy-700);
  border: 1px solid var(--grey-dk);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.news-card:hover {
  border-color: rgba(232, 98, 26, 0.45);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.news-card-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.2rem;
  background: rgba(232, 98, 26, 0.1);
  border-bottom: 1px solid var(--grey-dk);
}

.badge-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
}

.badge-date {
  font-size: 0.72rem;
  color: var(--grey-md);
}

.news-card-body {
  padding: 1.2rem;
}

.news-card-body h3 {
  font-size: 0.98rem;
  color: var(--white);
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.news-card-body p {
  font-size: 0.86rem;
  color: var(--grey-lt);
  line-height: 1.6;
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--grey-md);
  border: 2px dashed var(--grey-dk);
  border-radius: 10px;
}

.news-empty p { margin-top: 0.5rem; font-size: 0.9rem; }

/* =========================================================
   PARTNERS
   ========================================================= */
#partners { background: var(--navy-900); }

.partners-intro {
  color: var(--grey-lt);
  font-size: 1rem;
  max-width: 620px;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.partner-card {
  background: var(--navy-800);
  border: 1px solid var(--grey-dk);
  border-radius: 10px;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.partner-card:hover {
  border-color: rgba(232, 98, 26, 0.4);
  transform: translateY(-3px);
}

.partner-logo-box {
  width: 72px; height: 72px;
  margin: 0 auto 1rem;
  background: rgba(232, 98, 26, 0.1);
  border: 1px solid rgba(232, 98, 26, 0.25);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.partner-role {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 0.4rem;
}

.partner-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.3rem;
}

.partner-country {
  font-size: 0.8rem;
  color: var(--grey-md);
  margin-bottom: 0.75rem;
}

.partner-desc {
  font-size: 0.83rem;
  color: var(--grey-lt);
  line-height: 1.55;
}

.funder-section {
  border-top: 1px solid var(--grey-dk);
  padding-top: 2.5rem;
  margin-top: 1rem;
}

.funder-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-md);
  margin-bottom: 1.5rem;
  text-align: center;
}

.funder-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto;
  background: var(--navy-800);
  border: 1px solid rgba(232, 98, 26, 0.25);
  border-radius: 10px;
  padding: 1.5rem 2rem;
}

.funder-logo {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.funder-info h3 {
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 0.35rem;
}

.funder-info p {
  font-size: 0.85rem;
  color: var(--grey-lt);
  line-height: 1.55;
}

.contract-badge {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--orange-lt);
  background: rgba(232, 98, 26, 0.1);
  border: 1px solid rgba(232, 98, 26, 0.25);
  border-radius: 4px;
  padding: 3px 8px;
}

@media (max-width: 700px) {
  .partners-grid { grid-template-columns: 1fr; max-width: 380px; }
  .funder-card { flex-direction: column; text-align: center; }
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  background: var(--navy-900);
  border-top: 1px solid var(--grey-dk);
  padding: 3rem 0 2rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--grey-dk);
  margin-bottom: 1.5rem;
}

.footer-nav-logo { font-size: 1.2rem; }

.policy-contact-heading { margin-top: 0; }

.policy-contact-note {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--grey-md);
}

.footer-contract-no {
  font-family: var(--font-mono);
  color: var(--orange-lt);
  font-size: 0.78rem;
}

.footer-meta-label { margin-top: 0.5rem; }

.footer-brand p {
  color: var(--grey-md);
  font-size: 0.85rem;
  line-height: 1.6;
  margin-top: 0.75rem;
  max-width: 280px;
}

.footer-heading {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-md);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--grey-lt);
}

.footer-links a:hover { color: var(--orange-lt); }

.footer-meta {
  font-size: 0.8rem;
  color: var(--grey-md);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-meta a { color: var(--grey-md); }
.footer-meta a:hover { color: var(--orange-lt); }

.footer-project-title {
  display: block;
  font-size: 0.75rem;
  font-style: italic;
  color: rgba(180, 195, 220, 0.5);
  font-weight: 400;
  margin-bottom: 0.4rem;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--grey-md);
}

.footer-bottom a { color: var(--grey-md); }
.footer-bottom a:hover { color: var(--orange-lt); }

.esa-flag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--grey-md);
}

@media (max-width: 820px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* =========================================================
   ANNOUNCEMENT BANNER
   ========================================================= */
.announcement-banner {
  background: #0f1e3a;
  padding: 0.55rem 0;
  font-size: 0.95rem;
  color: rgba(180, 195, 220, 0.8);
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 60px; /* offset for fixed navbar height */
  position: relative;
  z-index: 99;
}

.banner-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem 0;
}

.banner-tag {
  color: #e8621a;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  flex-shrink: 0;
}

.banner-vdivider {
  display: inline-block;
  width: 1px;
  height: 1.1em;
  background: rgba(180, 195, 220, 0.3);
  margin: 0 0.9rem;
  flex-shrink: 0;
  vertical-align: middle;
}

.banner-events {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem 0;
}

.banner-date {
  color: #e8621a;
  font-weight: 500;
}

.banner-sep {
  color: rgba(180, 195, 220, 0.35);
}

.banner-link {
  color: #e8621a;
  text-decoration: none;
}

.banner-link:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .banner-tag { display: none; }
  .banner-vdivider { display: none; }
  .banner-sep { display: none; }
  .banner-item { display: block; text-align: center; }
  .banner-inner { flex-direction: column; gap: 0.2rem; }
}

/* =========================================================
   UTILITIES
   ========================================================= */
.divider {
  width: 48px; height: 3px;
  background: var(--orange);
  border-radius: 2px;
  margin-bottom: 1.5rem;
}

.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;
}