/* =========================================================================
   EXCLAUDED S.A.: landing page
   Black technical surface · monospace scramble · math cursor field
   ========================================================================= */

:root {
  --bg:            #05070a;
  --bg-raise:      #080b10;
  --ink:           #e8edf2;
  --ink-dim:       #8b98a8;
  --ink-faint:     #4d5b6b;
  --line:          #161c24;
  --line-strong:   #232c37;
  --accent:        #5ee9c5;
  --accent-deep:   #1b7a8c;
  --warn:          #e8553a;

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --gut: clamp(1.25rem, 5vw, 5.5rem);
  --max: 1240px;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(0.95rem, 0.9rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: #04120e; }

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

/* ---------------------------------------------------------------- layers */

#field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: none;
}

.glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    420px circle at var(--mx, 50%) var(--my, 40%),
    rgba(94, 233, 197, 0.075),
    rgba(94, 233, 197, 0.02) 45%,
    transparent 72%
  );
  transition: background 120ms linear;
}

.grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 110% 80% at 50% 0%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 110% 80% at 50% 0%, #000 25%, transparent 78%);
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------------------------------------------------------------- topbar */

.topbar {
  position: relative;
  z-index: 4;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: #04060900;
}

.ticker {
  display: flex;
  width: max-content;
  gap: 3rem;
  padding: 0.45rem 0;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  color: var(--ink-faint);
  white-space: nowrap;
  animation: slide 46s linear infinite;
}
.ticker span { padding-right: 3rem; }
.ticker sub, .ticker sup { font-size: 0.7em; }

@keyframes slide { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .ticker { animation: none; } }

/* ---------------------------------------------------------------- nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.85rem var(--gut);
  border-bottom: 1px solid var(--line);
  background: rgba(5, 7, 10, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
}
.brand-mark { color: var(--accent); font-size: 1rem; transform: translateY(1px); }
.brand-suffix { color: var(--ink-faint); font-weight: 400; letter-spacing: 0.1em; }

.nav-links {
  display: flex;
  gap: 1.75rem;
  margin: 0 0 0 auto;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}
.nav-links a { transition: color 160ms ease; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--accent); }

.lang {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: 0;
  padding: 0.32rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: transparent;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease;
}
.lang:hover { border-color: var(--accent-deep); color: var(--ink-dim); }
.lang-sep { opacity: 0.4; }
html[data-lang="en"] .lang-a,
html[data-lang="el"] .lang-b { color: var(--accent); }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .lang { margin-left: auto; }
}

/* ---------------------------------------------------------------- hero */

main { position: relative; z-index: 2; }

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4.5rem, 12vh, 9rem) var(--gut) clamp(4rem, 10vh, 7rem);
}

.eyebrow {
  margin: 0 0 clamp(2rem, 6vh, 3.5rem);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.wordmark {
  margin: 0;
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(2.6rem, 12.5vw, 10.5rem);
  line-height: 0.9;
  letter-spacing: -0.035em;
  color: var(--ink);
  text-shadow: 0 0 60px rgba(94, 233, 197, 0.14);
}

.claim {
  margin: clamp(1.25rem, 3vh, 2rem) 0 0;
  font-family: var(--mono);
  font-weight: 400;
  font-size: clamp(1rem, 2.4vw, 1.65rem);
  letter-spacing: -0.01em;
  color: var(--accent);
}

.lede {
  max-width: 62ch;
  margin: clamp(1.5rem, 4vh, 2.25rem) 0 0;
  font-size: clamp(1.02rem, 1.5vw, 1.28rem);
  line-height: 1.6;
  color: var(--ink-dim);
}

/* spec block --------------------------------------------------------- */

.spec {
  max-width: 720px;
  margin: clamp(2.5rem, 7vh, 4rem) 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(12, 17, 23, 0.9), rgba(6, 9, 13, 0.9));
  overflow: hidden;
}

.spec-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.015);
}
.spec-head .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--line-strong);
}
.spec-head .dot:first-child { background: #2b3540; }
.spec-title {
  margin-left: 0.6rem;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}

.spec-body { margin: 0; padding: 0.35rem 0; }
.spec-body > div {
  display: grid;
  grid-template-columns: 13.5rem 1fr;
  gap: 1rem;
  padding: 0.5rem 0.95rem;
  font-family: var(--mono);
  font-size: 0.76rem;
}
.spec-body dt {
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}
.spec-body dt::before { content: "› "; color: var(--accent-deep); }
.spec-body dd { margin: 0; color: var(--ink); }

@media (max-width: 620px) {
  .spec-body > div { grid-template-columns: 1fr; gap: 0.15rem; }
}

.hint {
  margin: clamp(2.5rem, 6vh, 4rem) 0 0;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-faint);
  opacity: 0.7;
}
.hint::after {
  content: " ⟶";
  display: inline-block;
  animation: nudge 2.4s ease-in-out infinite;
}
@keyframes nudge { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(8px); } }
@media (prefers-reduced-motion: reduce) { .hint::after { animation: none; } }

/* ---------------------------------------------------------------- bands */

.band {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 9vh, 6.5rem) var(--gut);
  border-top: 1px solid var(--line);
}

.rail {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
  padding-top: 0.35rem;
}
.rail .num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--accent-deep);
}
.rail .rule {
  width: 1px;
  flex: 1;
  min-height: 2rem;
  background: linear-gradient(to bottom, var(--line-strong), transparent);
}

.band-body { min-width: 0; }

.kicker {
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.band h2 {
  margin: 0;
  max-width: 22ch;
  font-family: var(--mono);
  font-weight: 500;
  font-size: clamp(1.5rem, 3.6vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.sub {
  margin: 1rem 0 0;
  max-width: 54ch;
  font-size: 0.98rem;
  color: var(--ink-faint);
}

.cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(1.5rem, 4vw, 3.5rem);
  margin-top: clamp(2rem, 5vh, 3rem);
}
.cols p { margin: 0; max-width: 52ch; color: var(--ink-dim); }

@media (max-width: 760px) {
  .band { grid-template-columns: 1fr; }
  .rail { flex-direction: row; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem; }
  .rail .rule { width: 100%; flex: 1; height: 1px; min-height: 0; background: linear-gradient(to right, var(--line-strong), transparent); }
}

/* ---------------------------------------------------------------- pillars */

.pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: clamp(2.25rem, 6vh, 3.5rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
.pillars li {
  position: relative;
  padding: 1.6rem 1.5rem 1.75rem;
  background: var(--bg);
  transition: background 220ms ease;
}
.pillars li:hover { background: var(--bg-raise); }
.pillars .idx {
  display: block;
  margin-bottom: 0.9rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--accent-deep);
}
.pillars h3 {
  margin: 0 0 0.7rem;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.98rem;
  letter-spacing: -0.005em;
  color: var(--accent);
}
.pillars p { margin: 0; font-size: 0.9rem; line-height: 1.6; color: var(--ink-dim); }

/* ---------------------------------------------------------------- fields */

.fields {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: clamp(2.25rem, 6vh, 3.5rem);
  background: var(--line);
  border: 1px solid var(--line);
}
.fields article {
  position: relative;
  padding: 1.5rem 1.4rem 1.6rem;
  background: var(--bg);
  transition: background 220ms ease;
}
.fields article::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 320ms cubic-bezier(0.22, 1, 0.36, 1);
}
.fields article:hover::before { width: 100%; }
.fields article:hover { background: var(--bg-raise); }
.fields .tag {
  position: absolute;
  top: 1.5rem; right: 1.4rem;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  opacity: 0.5;
}
.fields h3 {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.fields p { margin: 0; font-size: 0.85rem; line-height: 1.6; color: var(--ink-faint); }

@media (max-width: 1180px) {
  .pillars, .fields { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .pillars, .fields { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------------- principles */

.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem) clamp(2rem, 5vw, 4rem);
  margin: clamp(2.25rem, 6vh, 3.5rem) 0 0;
}
.principles > div { border-top: 1px solid var(--line-strong); padding-top: 1.1rem; }
.principles dt {
  margin-bottom: 0.6rem;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--accent);
}
.principles dd { margin: 0; max-width: 46ch; font-size: 0.92rem; color: var(--ink-dim); }

/* ---------------------------------------------------------------- entities */

.entities {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(2.25rem, 6vh, 3.5rem);
}
.entity {
  padding: 1.6rem 1.5rem;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(12, 17, 23, 0.6), transparent);
}
.entity-role {
  margin: 0 0 0.85rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.entity h3 {
  margin: 0 0 0.8rem;
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(1rem, 2vw, 1.35rem);
  letter-spacing: 0.02em;
  color: var(--ink);
}
.entity p { margin: 0; font-size: 0.9rem; color: var(--ink-dim); }

.link-glyph {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--ink-faint);
}
.link-glyph .link-op { color: var(--accent); }

@media (max-width: 820px) {
  .entities { grid-template-columns: 1fr; }
  .link-glyph { justify-content: center; transform: rotate(90deg); }
}

/* ---------------------------------------------------------------- contact */

.contact .cta { max-width: 18ch; }

.contact-line {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: clamp(1.75rem, 5vh, 2.75rem) 0 0;
}

.contact-label {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.contact-label::before { content: "› "; color: var(--accent-deep); }

.mailto {
  display: inline-block;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--accent-deep);
  font-family: var(--mono);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  transition: border-color 200ms ease, color 200ms ease;
}
.mailto:hover, .mailto:focus-visible { border-color: var(--accent); color: var(--ink); }

/* ---------------------------------------------------------------- footer */

.foot {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--line);
  padding: 1.75rem var(--gut);
}
.foot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
}
.foot .dim { color: var(--ink-faint); }
.foot .glyphs { color: var(--accent-deep); letter-spacing: 0.3em; }

/* ---------------------------------------------------------------- reveal */

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 620ms cubic-bezier(0.22, 1, 0.36, 1),
              transform 620ms cubic-bezier(0.22, 1, 0.36, 1);
}
[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}