/* -------------------------------------------------------------
   RESET & SYSTEM BASE
------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  width: 100vw;
  height: 100vh;
  max-width: 100%;
  max-height: 100%;
  overflow: hidden; /* Strict zero-scroll viewport lock */
  background-color: #ffffff;
  color: #111111;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  user-select: none;
  font-family: 'Inter', sans-serif;
}

/* Classical Roman capitals for official headings and seal */
.main-title,
.seal-typography,
.cat-link,
.node-label {
  font-family: 'Cinzel', serif;
  letter-spacing: 0.28em;
}

/* -------------------------------------------------------------
   TOP RIGHT EMBLEM & DEPARTMENT INSIGNIA
------------------------------------------------------------- */
.header-seal {
  width: 100%;
  display: flex;
  justify-content: flex-end;
  padding: 1rem 2.3rem 0 0;
}

.seal-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  width: 90px;
}

.mod-emblem {
  width: 82px;
  height: 82px;
  display: block;
}

.seal-typography {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  letter-spacing: 0.08em;
  line-height: 1.35;
}

.seal-line {
  font-size: 0.58rem;
  font-weight: 500;
  color: #1a1a1a;
  white-space: nowrap;
  letter-spacing: 0.12em;
}

.seal-line.bold {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

/* -------------------------------------------------------------
   OPTICALLY ELEVATED CORE STAGE
------------------------------------------------------------- */
.core-stage {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  /* Shifts visual weight up ~8% above geometric center for correct optical hierarchy */
  transform: translateY(-4.5rem);
}

/* Authoritative spaced title */
.main-title {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: 1.85rem;
  font-weight: 500;
  letter-spacing: 0.42em;
  text-indent: 0.42em; /* Offsets trailing letter-spacing to ensure absolute center */
  color: #050505;
  margin-bottom: 2.25rem;
  text-transform: uppercase;
  transform: translateY(-2.5rem);
}

/* -------------------------------------------------------------
   MINIMALIST ARCHIVAL SEARCHBAR
------------------------------------------------------------- */
.search-module {
  width: 100%;
  max-width: 580px;
  margin-bottom: 3.25rem;
}

.input-shell {
  display: flex;
  align-items: center;
  width: 100%;
  height: 48px;
  background-color: #ffffff;
  border: 1px solid #d4d4d8;
  border-radius: 9999px; /* Refined pill form factor */
  padding: 0 1.25rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-shell:hover {
  border-color: #a1a1aa;
}

.input-shell:focus-within {
  border-color: #18181b;
  box-shadow: 0 0 0 1px #18181b, 0 4px 16px rgba(0, 0, 0, 0.03);
}

.folder-glyph {
  width: 20px;
  height: 20px;
  stroke: #71717a;
  margin-right: 0.9rem;
  flex-shrink: 0;
  transition: stroke 0.2s ease;
}

.input-shell:focus-within .folder-glyph {
  stroke: #18181b;
}

#query-input {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 400;
  color: #111111;
  letter-spacing: 0.02em;
}

#query-input::placeholder {
  color: #a1a1aa;
  font-weight: 300;
}

/* -------------------------------------------------------------
   FOUR CATEGORY LINKS
------------------------------------------------------------- */
.category-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4rem;
  width: 100%;
}

.cat-link {
  background: none;
  border: none;
  outline: none;
  cursor: pointer;
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: #52525b;
  position: relative;
  padding: 0.35rem 0.2rem;
  transition: color 0.18s ease;
}

/* -------------------------------------------------------------
   REFINED BOTTOM LIGHT BLUE TRIM & HARDWARE LED
------------------------------------------------------------- */
.bottom-trim {
  width: 100%;
  height: 30px;
  background-color: #eaf3f8; /* Soft, clinical ice-blue tint */
  border-top: 1px solid #d2e4f0;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
}

.telemetry-node {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.node-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: #2c4251;
}

/* Recessed metal/chassis bezel ring */
.led-bezel {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #c3d9e8;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0.5px 1px rgba(0, 0, 0, 0.25), 0 0.5px 1px rgba(255, 255, 255, 0.8);
}

/* Diode core with realistic glow & lens reflection */
.led-core {
  width: 5.5px;
  height: 5.5px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #ffffff 0%, #38bdf8 45%, #0284c7 100%);
  box-shadow: 0 0 4px #0ea5e9, 0 0 8px rgba(14, 165, 233, 0.6);
  animation: signal-beacon 4.8s infinite ease-in-out;
}

/* Rhythmic pulse suggesting an active interstellar carrier frequency */
@keyframes signal-beacon {
  0%, 100% {
    opacity: 0.25;
    box-shadow: 0 0 1px rgba(14, 165, 233, 0.3);
  }
  50% {
    opacity: 1;
    box-shadow: 0 0 5px #38bdf8, 0 0 10px rgba(56, 189, 248, 0.85);
  }
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .header-seal {
    padding: 1.5rem 1.5rem 0 0;
  }
  .main-title {
    font-size: 1.35rem;
    letter-spacing: 0.25em;
    text-indent: 0.25em;
  }
  .category-row {
    gap: 1.5rem;
  }
  .cat-link {
    font-size: 0.72rem;
    letter-spacing: 0.15em;
  }
}