/* ==========================================================================
   Yasha Studios — Layout Styles
   --------------------------------------------------------------------------
   This file controls the large page regions:
   - Header/header spacing
   - Main content flow
   - Hero placement
   - Homepage project grid placement
   - Footer placement
   - Footer flag row placement

   Reusable visual components belong in components.css.
   Homepage-only fine-tuning belongs in pages/home.css.
   ========================================================================== */


/* ==========================================================================
   Layout tokens
   --------------------------------------------------------------------------
   These values reserve room for the desktop pull-tab navigation.
   The tabs themselves will be styled in components.css.
   ========================================================================== */

:root {
  --header-bar-height: 4.25rem;
  --header-tab-reserve: 3.25rem;
  --header-reserved-height: calc(var(--header-bar-height) + var(--header-tab-reserve));

  --section-block-padding: clamp(3rem, 8vw, 6rem);
  --section-inline-padding: var(--page-gutter);
}


/* ==========================================================================
   Site header
   --------------------------------------------------------------------------
   The header keeps enough vertical space for:
   - The top strip/bar
   - Default nav tabs
   - Hover/focus tab movement
   - The active tab hanging lower than the others

   This prevents the hero from jumping when nav tabs move.
   ========================================================================== */

.site-header {
  position: relative;
  z-index: 10;
  min-block-size: var(--header-reserved-height);
  padding-inline: var(--page-gutter);
}

/* The visual top strip behind the brand, nav, and theme toggle. */
.site-header::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  block-size: var(--header-bar-height);
  background: var(--color-surface);
  border-block-end: 1px solid var(--color-border);
  box-shadow: var(--shadow-subtle);
}

/*
  Main header content row.
  The nav sits in the center column so the brand and theme toggle can flank it.
*/
.site-header__bar {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: clamp(1rem, 3vw, 2rem);
  max-inline-size: var(--content-max-width);
  min-block-size: var(--header-bar-height);
  margin-inline: auto;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  inline-size: 2.75rem;
  block-size: 2.75rem;
}

.site-nav {
  justify-self: center;
  align-self: start;
}

.theme-toggle {
  align-self: center;
}


/* ==========================================================================
   Main content
   ========================================================================== */

main {
  isolation: isolate;
}


/* ==========================================================================
   Hero layout
   --------------------------------------------------------------------------
   The hero fills the remaining first viewport below the reserved header area.
   This creates the intended landing-screen effect without using fixed heights.
   ========================================================================== */

.hero {
  display: grid;
  place-items: center;
  min-block-size: calc(100svh - var(--header-reserved-height));
  padding-block: clamp(3rem, 7vw, 6rem);
  padding-inline: var(--section-inline-padding);
}

.hero__inner {
  display: grid;
  justify-items: center;
  gap: clamp(1rem, 3vw, 1.5rem);
  inline-size: min(100%, 54rem);
  margin-inline: auto;
  text-align: center;
}

.hero__title {
  margin: 0;
}

/*
  The wordmark graphic itself is applied later as a CSS mask.
  These dimensions give that future mask a predictable box to live in.
*/
.hero__wordmark {
  display: block;
  inline-size: min(82vw, 34rem);
  block-size: clamp(4rem, 12vw, 7rem);
}

.hero__tagline {
  max-inline-size: 48rem;
  margin-block: 0;
}

.hero__announcement {
  max-inline-size: 38rem;
  margin-block: 0;
}


/* ==========================================================================
   Homepage project section layout
   --------------------------------------------------------------------------
   The homepage cards are curated, not exhaustive.
   They become two columns on wider screens and collapse to one column on narrow
   screens.
   ========================================================================== */

.home-projects {
  padding-block: var(--section-block-padding);
  padding-inline: var(--section-inline-padding);
  scroll-margin-block-start: calc(var(--header-reserved-height) + 1rem);
}

.home-projects__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  max-inline-size: var(--content-max-width);
  margin-inline: auto;
}

/* Wider screens get the locked two-card homepage layout. */
@media (min-width: 52rem) {
  .home-projects__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
  }
}


/* ==========================================================================
   Site footer layout
   --------------------------------------------------------------------------
   The footer contains:
   - Return to top control
   - Floating social panel
   - Flag row
   - Legal/copyright line
   ========================================================================== */

.site-footer {
  display: grid;
  justify-items: center;
  gap: clamp(1rem, 3vw, 1.5rem);
  padding-block: clamp(2.5rem, 7vw, 4rem) clamp(1.5rem, 4vw, 2rem);
  padding-inline: var(--section-inline-padding);
}

.return-to-top {
  justify-self: center;
}

/*
  Slightly wider now that Return to top lives inside the footer panel.
*/
.footer-social {
  inline-size: min(100%, 52rem);
}

/*
  The flag row sits below the footer/social panel and above legal text.
  These images are meaningful, not decorative, so the HTML should keep clear
  alt text for each flag.
*/
.footer-flags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  max-inline-size: 100%;
}

.footer-flags img {
  inline-size: clamp(2.25rem, 7.5vw, 3.4rem);
  block-size: auto;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  background: var(--color-surface);
}

.site-footer__legal {
  margin-block: 0;
  color: var(--color-text-soft);
  font-size: 0.875rem;
  text-align: center;
}


/* ==========================================================================
   Mobile and narrow-screen layout adjustments
   --------------------------------------------------------------------------
   On narrow screens, the pull-tab metaphor will be softened by component CSS.
   Here we reduce the reserved header space so the page does not feel top-heavy.
   ========================================================================== */

@media (max-width: 46rem) {
  :root {
    --header-bar-height: auto;
    --header-tab-reserve: 0rem;
    --header-reserved-height: auto;
  }

  .site-header {
    min-block-size: auto;
  }

  .site-header::before {
    block-size: 100%;
  }

  .site-header__bar {
    grid-template-columns: auto auto;
    align-items: center;
    gap: 0.75rem;
    padding-block: 0.75rem;
  }

  .site-nav {
    grid-column: 1 / -1;
    justify-self: stretch;
    inline-size: 100%;
  }

  .hero {
    min-block-size: calc(100svh - 8rem);
    padding-block: clamp(2.5rem, 12vw, 4rem);
  }

  .hero__wordmark {
    inline-size: min(86vw, 28rem);
    block-size: clamp(3.25rem, 16vw, 5.5rem);
  }
}