/**
 * Itzune Design System — Component Styles
 * Deep-ocean bioluminescent terminal aesthetic,
 * adapted to Itzune's neural-network logo palette.
 */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body);
  color: var(--color-mist);
  background: var(--gradient-cosmic-void);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─────────────────────────────────────────────
   ASCII Background — fixed full-page layer
   Canvas sits at z-index 0; all content above it
───────────────────────────────────────────── */
.ascii-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  display: block;
}

/* ─────────────────────────────────────────────
   Typography
───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-jetbrains-mono);
  font-weight: var(--font-weight-regular);  /* deliberate: whisper-weight at large sizes */
  color: var(--color-ghost-white);
  line-height: var(--leading-heading);
}

h2 {
  font-size: var(--text-heading); /* 30px */
}

p {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-mist);
}

small, .caption {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  color: var(--color-ash);
}

a {
  color: var(--color-itzune-sky);
  text-decoration: none;
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-ghost-white);
}

/* ─────────────────────────────────────────────
   Layout
───────────────────────────────────────────── */
.page-container {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-32);
}

.page-container--wide {
  max-width: 100%;
  padding: 0;
}

main {
  display: flex;
  flex-direction: column;
  gap: var(--section-gap);
  padding-bottom: var(--spacing-64);
  position: relative;
  z-index: 1;
}

section {
  /* Each section is a distinct block; no card containers on prose */
}

/* ─────────────────────────────────────────────
   Navigation Bar
───────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background-color: var(--color-steel-navy);
  padding: var(--spacing-8) var(--spacing-48);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav__left,
.nav__right {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
}

/* Flat text nav link (Documentation style) */
.nav__link {
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-regular);
  color: var(--color-itzune-sky);
  text-decoration: none;
  background: transparent;
  border-radius: 0;
  padding: 0;
  border: none;
  cursor: pointer;
  transition: color 0.2s ease;
}

.nav__link:hover {
  color: var(--color-ghost-white);
}

/* ─────────────────────────────────────────────
   Pill Buttons (Specimen Tray System)
   Closed triad: Magenta / Sky / Amber
───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-regular);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  padding: var(--spacing-8) 20px;
  box-shadow: var(--shadow-sm);
  transition: filter 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
  line-height: 1;
}

.btn:hover {
  filter: brightness(1.2);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

/* Sign Up — Magenta specimen */
.btn--signup {
  background-color: rgba(107, 8, 69, 0.20);
  color: var(--color-itzune-magenta);
}

/* Explore — Sky Blue specimen */
.btn--explore {
  background-color: rgba(10, 58, 90, 0.20);
  color: var(--color-itzune-sky);
}

/* Contact / Log In — Amber specimen */
.btn--contact {
  background-color: rgba(90, 40, 0, 0.20);
  color: var(--color-itzune-amber);
}

/* Large pill variant for hero */
.btn--lg {
  font-size: var(--text-body);
  padding: 12px 28px;
}

/* ─────────────────────────────────────────────
   Hero Section
───────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  /* No background — the fixed .ascii-bg canvas shows through */
}

.hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-32);
  text-align: center;
  padding: var(--spacing-32);
}

.hero__logo {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-lg);
  opacity: 0.95;
  filter: drop-shadow(0 0 24px rgba(75, 184, 232, 0.25))
          drop-shadow(0 0 48px rgba(233, 30, 140, 0.15));
}

.hero__wordmark {
  font-family: var(--font-jetbrains-mono);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: var(--font-weight-regular);
  color: var(--color-ghost-white);
  letter-spacing: 0.08em;
  line-height: 1;
  /* Bioluminescent text glow using logo accent colors */
  text-shadow:
    0 0 20px rgba(75, 184, 232, 0.4),
    0 0 60px rgba(233, 30, 140, 0.15);
}

.hero__tagline {
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-body);
  color: var(--color-mist);
  opacity: 0.7;
  max-width: 480px;
  line-height: var(--leading-body);
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
  flex-wrap: wrap;
  justify-content: center;
}

/* Scroll hint */
.hero__scroll {
  position: absolute;
  bottom: var(--spacing-32);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-caption);
  color: var(--color-mist);
  opacity: 0.35;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-8);
  animation: hero-scroll-pulse 2.4s ease-in-out infinite;
}

@keyframes hero-scroll-pulse {
  0%, 100% { opacity: 0.2; transform: translateX(-50%) translateY(0); }
  50%       { opacity: 0.5; transform: translateX(-50%) translateY(4px); }
}

/* ─────────────────────────────────────────────
   Section Headings (icon + label)
───────────────────────────────────────────── */
.section-heading {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-heading);
  font-weight: var(--font-weight-regular);
  color: var(--color-ghost-white);
  line-height: var(--leading-heading);
}

.section-heading__icon {
  font-size: var(--text-body);
  color: var(--color-itzune-orange);
  line-height: 1;
  /* subtle glow on icons */
  filter: drop-shadow(0 0 6px rgba(240, 112, 48, 0.5));
}

/* ─────────────────────────────────────────────
   Prose Body Block
───────────────────────────────────────────── */
.prose {
  max-width: 640px;
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body);
  color: var(--color-mist);
}

.prose p + p {
  margin-top: var(--spacing-16);
}

.prose a {
  color: var(--color-itzune-sky);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.prose a:hover {
  color: var(--color-ghost-white);
  border-bottom-color: var(--color-itzune-sky);
}

.prose strong {
  font-weight: var(--font-weight-medium);
  color: var(--color-ghost-white);
  font-family: var(--font-dm-sans);
}

.prose em {
  color: var(--color-itzune-sky);
  font-style: normal;
}

/* ─────────────────────────────────────────────
   Image / Project Grid
───────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-8);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid__item {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-images);
  overflow: hidden;
  border: 1px solid rgba(229, 231, 235, 0.12);
  background-color: var(--color-abyssal-blue);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.grid__item:hover {
  border-color: rgba(75, 184, 232, 0.3);
  transform: translateY(-2px);
}

.grid__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ─────────────────────────────────────────────
   Cards (surface level 3)
───────────────────────────────────────────── */
.card {
  background-color: var(--color-steel-navy);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.card__label {
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-caption);
  color: var(--color-ash);
  margin-bottom: var(--spacing-8);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card__title {
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-body);
  color: var(--color-ghost-white);
  font-weight: var(--font-weight-regular);
  margin-bottom: var(--spacing-8);
}

.card__body {
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-caption);
  color: var(--color-mist);
  line-height: var(--leading-caption);
}

/* ─────────────────────────────────────────────
   Divider
───────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid rgba(229, 231, 235, 0.08);
  margin: 0;
}

/* ─────────────────────────────────────────────
   Status / Tag Chips (categorical, not CTA)
───────────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-caption);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.tag--sky    { background: rgba(10,  58, 90, 0.35); color: var(--color-itzune-sky);     }
.tag--magenta{ background: rgba(107,  8, 69, 0.35); color: var(--color-itzune-magenta); }
.tag--amber  { background: rgba(90,  40,  0, 0.35); color: var(--color-itzune-amber);   }
.tag--purple { background: rgba(60,  15, 85, 0.35); color: var(--color-itzune-purple);  }
.tag--orange { background: rgba(80,  30,  0, 0.35); color: var(--color-itzune-orange);  }

/* ─────────────────────────────────────────────
   Inputs / Forms
───────────────────────────────────────────── */
.input {
  display: block;
  width: 100%;
  background: var(--color-abyssal-blue);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-inputs);
  padding: var(--spacing-8) var(--spacing-16);
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-body);
  color: var(--color-mist);
  outline: none;
  transition: border-color 0.2s ease;
}

.input::placeholder {
  color: var(--color-ash);
}

.input:focus {
  border-color: rgba(75, 184, 232, 0.4);
}

/* ─────────────────────────────────────────────
   Footer
───────────────────────────────────────────── */
.footer {
  background-color: var(--color-steel-navy);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--spacing-32) var(--spacing-48);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-16);
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.footer__copy {
  font-family: var(--font-jetbrains-mono);
  font-size: var(--text-caption);
  color: var(--color-mist);
  opacity: 0.85;
}

.footer__links {
  display: flex;
  gap: var(--spacing-24);
}

.footer__links a {
  font-size: var(--text-caption);
  color: var(--color-mist);
  opacity: 0.9;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.footer__links a:hover {
  color: var(--color-itzune-sky);
  opacity: 1;
}


/* ─────────────────────────────────────────────
   Responsive
───────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav {
    padding: var(--spacing-8) var(--spacing-16);
    flex-wrap: wrap;
    gap: var(--spacing-8);
  }

  .hero__wordmark {
    font-size: 28px;
  }

  .grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-container {
    padding: 0 var(--spacing-16);
  }

  .footer {
    padding: var(--spacing-24) var(--spacing-16);
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
  }

  .grid {
    grid-template-columns: repeat(2, 1fr);
  }

  main {
    gap: var(--spacing-48);
  }
}