/* ============================================================
   MARS AVATAR PROJECT — STYLESHEET
   Design tokens: deep-space navy background, Mars-orange accent,
   soft red highlight. Space Grotesk for headings (technical feel),
   Inter for body text, JetBrains Mono for data/labels.
   ============================================================ */

:root {
  /* Colors */
  --bg-deep: #05070d;          /* near-black space background */
  --bg-panel: #0b1220;         /* dark blue panel background */
  --bg-panel-alt: #0e1526;     /* slightly lighter panel for alternating sections */
  --line: rgba(255, 255, 255, 0.08);

  --blue-deep: #13294b;        /* structural dark blue */
  --blue-glow: #3a6ea5;        /* lighter blue for glows/accents */

  --mars: #c1440e;             /* primary Mars orange */
  --mars-bright: #ff6b35;      /* brighter orange for hover/highlight */
  --red-soft: #b3392a;         /* soft red accent */

  --text: #eef1f5;
  --text-dim: #9aa7b8;
  --text-faint: #5f6b7d;

  /* Type */
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  /* Layout */
  --max-width: 1080px;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--bg-deep);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--text);
  margin: 0;
}

a { color: inherit; }

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

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* ============ NAVIGATION ============ */
#site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(5, 7, 13, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}

#nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: flex-end;
}

#nav-links a {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 6px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

#nav-links a:hover,
#nav-links a:focus-visible {
  color: var(--text);
  background-color: rgba(193, 68, 14, 0.15);
}

/* Hamburger button — hidden on desktop */
#nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

#nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text);
  border-radius: 2px;
}

/* ============ HERO / HOME ============ */
header#home {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 24px 60px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(58, 110, 165, 0.25), transparent 60%),
    radial-gradient(ellipse 70% 60% at 50% 100%, rgba(193, 68, 14, 0.12), transparent 70%),
    var(--bg-deep);
}

.signal-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  margin-bottom: 32px;
}

.signal-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--mars-bright);
  box-shadow: 0 0 8px var(--mars-bright);
}

header#home h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  max-width: 900px;
}

.tagline {
  font-family: var(--font-mono);
  color: var(--mars-bright);
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 18px 0 0;
}

.hero-sub {
  max-width: 620px;
  color: var(--text-dim);
  font-size: 1.05rem;
  margin: 24px auto 0;
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  font-size: 1.4rem;
  color: var(--text-faint);
  text-decoration: none;
  animation: bob 2.2s ease-in-out infinite;
}

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

/* ============ BUTTONS ============ */
.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 32px;
}

.button {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 8px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  background-color: transparent;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.button:hover,
.button:focus-visible {
  border-color: var(--mars-bright);
  background-color: rgba(193, 68, 14, 0.1);
  transform: translateY(-2px);
}

.button-primary {
  background-color: var(--mars);
  border-color: var(--mars);
}

.button-primary:hover,
.button-primary:focus-visible {
  background-color: var(--mars-bright);
  border-color: var(--mars-bright);
}

/* ============ SECTIONS ============ */
.section {
  padding: 96px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-alt {
  max-width: none;
  background-color: var(--bg-panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-alt > * {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mars-bright);
  margin: 0 0 12px;
}

.section h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  margin-bottom: 24px;
}

.section-intro {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0 0 40px;
}

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

.section-grid p {
  color: var(--text-dim);
  margin: 0;
}

.section-grid em {
  color: var(--text);
  font-style: normal;
  font-weight: 600;
}

.note {
  color: var(--text-faint);
  font-size: 0.9rem;
  margin-top: 16px;
}

/* ============ STATS ============ */
.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

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

.stat-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--mars-bright);
}

.stat-label {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 4px;
}

/* ============ CARDS ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background-color: var(--bg-panel-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--blue-glow);
  transform: translateY(-4px);
}

.section-alt .card {
  background-color: var(--bg-deep);
}

.card-index {
  display: block;
  font-family: var(--font-mono);
  color: var(--text-faint);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin: 0;
}

/* ============ CHECK LIST ============ */
.check-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 560px;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--text-dim);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--mars-bright);
  border-radius: 2px;
}

/* ============ TIMELINE (Roadmap) ============ */
.timeline {
  position: relative;
  margin-top: 24px;
  padding-left: 32px;
  border-left: 1px solid var(--line);
}

.timeline-item {
  position: relative;
  padding: 0 0 48px 24px;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 4px;
  width: 12px;
  height: 12px;
  background-color: var(--bg-deep);
  border: 2px solid var(--mars-bright);
  border-radius: 50%;
}

.timeline-marker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--mars-bright);
  margin-bottom: 8px;
}

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

.timeline-content p {
  color: var(--text-dim);
  margin: 0;
  max-width: 560px;
}

/* ============ GALLERY ============ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.gallery-placeholder {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-panel-alt);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ============ FOOTER ============ */
footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--line);
  color: var(--text-faint);
  font-size: 0.85rem;
}

.footer-author {
  margin-top: 6px;
  color: var(--text-faint);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 860px) {
  .section-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  #nav-toggle { display: flex; }

  #nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--line);
    padding: 8px;
  }

  #nav-links.open { display: flex; }

  #nav-links a { padding: 12px 16px; }

  .card-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 20px; }
  .stat-row { gap: 28px; }
}
/* ============ GALLERY IMAGES ============ */
.gallery-item {
  margin: 0;
  background-color: var(--bg-panel-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.gallery-item:hover {
  border-color: var(--blue-glow);
  transform: translateY(-4px);
}

.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
}

.gallery-item figcaption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  border-top: 1px solid var(--line);
}
/* ============ SCROLL REVEAL ============ */
/* Раздел начинает невидимым и чуть смещённым вниз... */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ...и плавно появляется, когда попадает в поле зрения */
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Если у пользователя включён режим "меньше анимации" — показываем сразу */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ============ ACTIVE NAV LINK ============ */
/* Пункт меню текущего раздела подсвечивается оранжевым */
#nav-links a.active {
  color: var(--mars-bright);
  background-color: rgba(193, 68, 14, 0.12);
}
/* ============ CONTACT EMAIL ============ */
.contact-email {
  margin-top: 28px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.contact-label {
  display: inline-block;
  color: var(--text-faint);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  margin-right: 12px;
}

.contact-email a {
  color: var(--mars-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 53, 0.4);
}

.contact-email a:hover {
  border-bottom-color: var(--mars-bright);
}