/* =============================================
   Eternal Software Initiative — Styles
   ============================================= */

:root {
  --bg:           #000000;
  --bg-subtle:    #0a0a0a;
  --bg-card:      #0d0d0d;
  --border:       #1a1a1a;
  --border-hover: #2a2a2a;
  --text:         #e0e0e0;
  --text-dim:     #777777;
  --text-bright:  #ffffff;
  --accent:       #4a7fb5;
  --accent-glow:  #4a7fb520;
  --mono:         'JetBrains Mono', 'Menlo', monospace;
  --sans:         'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---- Navigation ---- */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  transition: background 0.4s, box-shadow 0.4s;
}

nav.scrolled {
  background: #000;
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--text-bright);
}

/* ---- Container ---- */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ---- Sections ---- */
.section {
  position: relative;
  z-index: 1;
  padding: 7rem 0;
}

.section-dark {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--text-bright);
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.hero-content {
  animation: fadeUp 1.2s ease-out;
}

.hero-logo {
  max-width: min(1090px, 95vw);
  height: auto;
  margin-bottom: 2rem;
  filter: brightness(1.1);
}

.hero-tagline {
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--text-dim);
  max-width: 500px;
  margin: 0 auto;
  letter-spacing: 0.02em;
}

/* ---- Content Grid ---- */
.content-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  align-items: start;
}

.lead {
  font-size: 1.15rem;
  color: var(--text-bright);
  font-weight: 300;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.lead.center {
  text-align: center;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 3rem;
}

.inline-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  transition: opacity 0.3s;
}

.inline-link:hover {
  opacity: 0.7;
}

.content-main p {
  margin-bottom: 1.2rem;
  color: var(--text);
  font-size: 0.95rem;
}

/* ---- Stat Cards ---- */
.stat-card {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  margin-bottom: 1rem;
  transition: border-color 0.3s;
}

.stat-card:hover {
  border-color: var(--border-hover);
}

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

.stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-bright);
  margin: 0.1rem 0;
}

.stat-desc {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ---- Callout ---- */
.callout {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.callout-title {
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--text-bright);
  margin-bottom: 1.5rem;
}

.callout p {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 1.2rem;
}

.callout-emphasis {
  font-size: 1.1rem !important;
  color: var(--text-bright) !important;
  font-weight: 500;
  font-style: italic;
  border-left: 2px solid var(--accent);
  padding-left: 1.2rem;
  margin-top: 2rem !important;
  text-align: left;
}

/* ---- Narrative Prose (Solution) ---- */
.narrative {
  max-width: 700px;
  margin: 0 auto;
}

.narrative p {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.narrative strong {
  color: var(--text-bright);
  font-weight: 600;
}

.narrative em {
  color: var(--accent);
  font-style: normal;
  font-weight: 500;
}

/* ---- Architecture Prose ---- */
.arch-prose {
  max-width: 700px;
  margin: 0 auto 3rem;
}

.arch-prose p {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.arch-prose code {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.arch-prose strong {
  color: var(--text-bright);
  font-weight: 600;
}

/* ---- Instruction Box ---- */
.instruction-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  max-width: 600px;
  margin: 0 auto;
}

.instruction-header {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 0.8rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.instruction-box pre {
  padding: 1.5rem;
  background: var(--bg);
}

.instruction-box code {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text-bright);
  line-height: 1.8;
}

.instruction-footer {
  font-size: 0.78rem;
  color: var(--text-dim);
  padding: 0.8rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  text-align: center;
}

.instruction-footer code {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
}

/* ---- Capsule Highlight ---- */
.capsule-highlight {
  display: flex;
  align-items: center;
  gap: 2rem;
  max-width: 600px;
  margin: 0 auto 3rem;
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  transition: border-color 0.3s;
}

.capsule-highlight:hover {
  border-color: var(--border-hover);
}

.capsule-img {
  height: 64px;
  width: auto;
  flex-shrink: 0;
}

.capsule-highlight-text h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
}

.capsule-highlight-text p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.capsule-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.3em 0.7em;
  border-radius: 4px;
  letter-spacing: 0.03em;
}

.storage-note {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.storage-note p {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-style: italic;
  border-top: 1px solid var(--border);
  padding-top: 2rem;
}

/* ---- VM Pseudocode ---- */
.vm-pseudocode {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  max-width: 720px;
  margin: 0 auto;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.code-title {
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  font-family: var(--mono);
}

.vm-pseudocode pre {
  padding: 1.5rem;
  background: var(--bg);
  overflow-x: auto;
}

.vm-pseudocode code {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--text);
}

.vm-pseudocode .kw { color: #c792ea; }
.vm-pseudocode .fn { color: #72ef9a; }
.vm-pseudocode .cm { color: #546e7a; }

/* ---- Final Section ---- */
.section-final {
  padding: 8rem 0;
  text-align: center;
}

.future-message {
  max-width: 600px;
  margin: 0 auto;
}

.future-message h3 {
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--text-bright);
  margin-bottom: 1.5rem;
}

.future-message p {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 1rem;
}

.future-highlight {
  font-size: 1.1rem !important;
  color: var(--accent) !important;
  font-weight: 500;
  margin: 2rem 0 !important;
}

.future-date {
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 3rem;
}

/* ---- Footer ---- */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

footer p {
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* ---- Contact Form ---- */
.contact-form {
  max-width: 520px;
  margin: 0 auto;
}

.contact-form h3 {
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
  text-align: center;
}

.contact-form .contact-subtitle {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: center;
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-bright);
  font-family: var(--sans);
  font-size: 0.9rem;
  transition: border-color 0.3s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #444;
}

.form-submit {
  display: block;
  width: 100%;
  padding: 0.8rem;
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.3s, color 0.3s;
  margin-top: 0.5rem;
}

.form-submit:hover {
  background: var(--accent);
  color: var(--bg);
}

/* ---- Animations ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Scroll-triggered fade */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav-links { display: none; }

  .section { padding: 4rem 0; }

  .section-title { font-size: 1.6rem; }

  .content-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .capsule-highlight {
    flex-direction: column;
    text-align: center;
  }

  .hero-tagline {
    font-size: 1rem;
  }

  .hero-logo {
    max-width: 90vw;
  }
}