/* ============================================================
   salsahistoria.com — stylesheet
   Cuban flag: Havana Red · Royal Azure · Celia Gold · Stucco White
   ============================================================ */

@layer reset, base, layout, components, landing;

/* ================================================================
   DESIGN TOKENS
   ================================================================ */
:root {
  /* Fonts */
  --font-heading: "DM Serif Display", Georgia, serif;
  --font-body: "Lato", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", monospace;

  /* ── Palette ── */
  --color-bg: #fdfdfd; /* Stucco White */
  --color-text: #1c1c1c; /* Tobacco Black */
  --color-action: #d21034; /* Havana Red — links, buttons, CTAs */
  --color-emphasis: #002590; /* Royal Azure — headings, structure */
  --color-highlight: #ffc107; /* Celia Gold — hover, active states */
  /*
   * Background options: --color-bg (white) · --color-emphasis (blue) · pale yellow (#fff8e8)
   * Combination rules:
   *   white/yellow bg → --color-text (charcoal)
   *   emphasis bg     → --color-bg   (white text)
   *   action (red)    → text/outline only, never a background fill
   */
  --color-border: #e2e2e2;
  --color-code-bg: #1c1c1c;
  --color-code-text: #fdfdfd;
  --color-shadow: oklch(0% 0 0 / 0.08);

  /* ── Fluid spacing ── */
  --space-xs: clamp(0.375rem, 1vw, 0.5rem);
  --space-sm: clamp(0.75rem, 2vw, 1rem);
  --space-md: clamp(1.25rem, 4vw, 2rem);
  --space-lg: clamp(2rem, 6vw, 4rem);
  --space-xl: clamp(3rem, 8vw, 6rem);

  /* ── Shared Constants ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-speed: 0.2s;

  /* Layout */
  --content-width: 54rem;
  --nav-height: 4rem;
}

/* ================================================================
   RESET
   ================================================================ */
@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html,
  body {
    margin: 0;
    padding: 0;
  }

  :is(h1, h2, h3, h4, h5, h6, p, blockquote, figure) {
    margin: 0;
    padding: 0;
  }

  img,
  video {
    max-inline-size: 100%;
    block-size: auto;
    display: block;
  }
}

/* ================================================================
   BASE
   ================================================================ */
@layer base {
  html {
    font-size: 100%;
    scrollbar-gutter: stable;
  }

  @media (prefers-reduced-motion: no-preference) {
    html {
      scroll-behavior: smooth;
    }
  }

  * {
    transition:
      background-color var(--transition-speed) ease,
      color var(--transition-speed) ease,
      border-color var(--transition-speed) ease,
      fill var(--transition-speed) ease,
      stroke var(--transition-speed) ease;
  }

  body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-block-size: 100dvh;
  }

  :is(h1, h2, h3, h4, h5, h6) {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-block: var(--space-md) var(--space-sm);
    color: var(--color-text);
    text-wrap: balance;
  }

  h1 {
    font-size: clamp(2.25rem, 6vw, 2.75rem);
  }
  h2 {
    font-size: clamp(1.6rem, 3.5vw, 1.85rem);
  }
  h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  }
  h4 {
    font-size: clamp(1.125rem, 2vw, 1.35rem);
  }
  h5 {
    font-size: 1.125rem;
  }
  h6 {
    font-size: 0.925rem;
  }

  :target {
    scroll-margin-block-start: var(--space-md);
  }

  a {
    color: var(--color-action);
    text-decoration: none;
    transition: opacity var(--transition-speed);
  }

  a:hover {
    opacity: 0.75;
  }

  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--color-action);
    outline-offset: 4px;
    border-radius: 2px;
  }

  :is(code, pre, .mono) {
    font-family: var(--font-mono);
    font-size: 0.85em;
  }

  pre {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    body & {
      background-color: var(--color-code-bg);
    }
    color: var(--color-code-text);
    overflow-x: auto;
    overflow-wrap: break-word;
    white-space: pre-wrap;
    margin-block: var(--space-sm);
  }

  ul,
  ol {
    padding-inline-start: 1.5rem;
    margin-block: var(--space-sm);
  }

  li > ul,
  li > ol {
    margin-block: 0;
  }
}

/* ================================================================
   LAYOUT
   ================================================================ */
@layer layout {
  main {
    flex: 1;
    width: 100%;
    display: grid;
    grid-template-columns:
      minmax(1rem, 1fr)
      min(100% - 2rem, var(--content-width))
      minmax(1rem, 1fr);
    align-items: start;
  }

  main > * {
    grid-column: 2;
  }

  /* ── Navigation ── */
  .site-header {
    background-color: var(--color-emphasis);
    width: 100%;
  }

  .nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    block-size: var(--nav-height);
    padding-inline: 0.75rem;
    max-inline-size: var(--content-width);
    margin-inline: auto;
    font-family: var(--font-body);
  }

  .nav-bar a:not(.nav-logo) {
    color: #fdfdfd;
    text-transform: lowercase;
  }

  .nav-bar a:not(.nav-logo):hover {
    opacity: 1;
    color: var(--color-highlight);
  }

  .nav-logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: #fdfdfd;
    font-family: var(--font-heading);
    font-style: italic;
  }

  .nav-logo:hover {
    opacity: 1;
    color: var(--color-highlight);
  }

  .nav-links {
    margin-inline-start: auto;
  }

  .nav-links a {
    margin-inline-start: var(--space-sm);
  }

  .nav-bar a.active {
    color: var(--color-highlight);
    font-weight: 600;
  }

  /* ── Page header ── */
  .page-header {
    margin-block-end: var(--space-md);
  }

  .page-header h1 {
    font-size: clamp(2.25rem, 6vw, 3.25rem);
    color: var(--color-emphasis);
  }

  /* ── Footer ── */
  .site-footer {
    background-color: var(--color-emphasis);
    width: 100%;
    font-size: 0.9rem;
    padding-block: var(--space-md);
  }

  .footer-content {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-inline: 0.75rem;
    max-inline-size: var(--content-width);
    margin-inline: auto;
    font-family: var(--font-body);
    flex-wrap: wrap;
    gap: var(--space-sm);
    color: #fdfdfd;
    opacity: 0.85;
  }

  .footer-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .footer-separator {
    opacity: 0.5;
    user-select: none;
  }

  .footer-content a {
    color: #fdfdfd;
  }

  .footer-content a:hover {
    color: var(--color-highlight);
    opacity: 1;
  }
}

/* ================================================================
   COMPONENTS
   ================================================================ */
@layer components {
  .section-description {
    font-size: 1.125rem;
    font-style: italic;
    opacity: 0.8;
    margin-block-start: var(--space-xs);
  }

  /* ── Post / page content ── */
  .post-content {
    font-size: 1.125rem;
  }

  .post-content img {
    max-inline-size: 100%;
    block-size: auto;
    border-radius: var(--radius-sm);
    margin-inline: auto;
  }

  .post-content figure {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-block: var(--space-md);
  }

  .post-content figcaption {
    margin-block-start: var(--space-xs);
    font-size: 0.875rem;
    opacity: 0.8;
    text-align: center;
  }

  .post-content p {
    margin-block-end: var(--space-sm);
  }

  .post-content li {
    margin-block-end: 0.25rem;
  }

  .post-content table {
    width: 100%;
    border-collapse: collapse;
    margin-block: var(--space-sm);
  }

  .post-content :is(th, td) {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-border);
    text-align: start;
  }

  .post-content th {
    background-color: oklch(0% 0 0 / 0.05);
    font-weight: 600;
  }

  /* ── Blockquotes ── */
  blockquote {
    margin-block: var(--space-md);
    border-inline-start: 4px solid var(--color-emphasis);
    background: oklch(50% 0 0 / 0.04);
    padding-block: var(--space-xs);
    padding-inline: var(--space-md) var(--space-sm);
    font-style: italic;
  }

  blockquote p:first-child {
    margin-block-start: 0;
  }
  blockquote p:last-child {
    margin-block-end: 0;
  }

  /* ── Content lists ── */
  :is(.posts, .content-list) {
    list-style: none;
    padding: 0;
    margin-block: var(--space-md);
  }

  .title-list {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-block: var(--space-sm);
    border-block-end: 1px solid var(--color-border);
  }

  .title-list:last-child {
    border-block-end: none;
  }

  .content-link {
    font-size: 1.25rem;
    font-weight: 500;
    font-family: var(--font-heading);
    color: var(--color-text);
    transition: color var(--transition-speed) ease;
  }

  .content-link:hover {
    color: var(--color-action);
  }

  .content-meta {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--color-text);
    opacity: 0.6;
    flex-shrink: 0;
    margin-inline-start: var(--space-sm);
  }

  /* ── CTA Button ── */
  .btn-cta {
    display: inline-block;
    background-color: transparent;
    color: var(--color-action);
    border: 2px solid var(--color-action);
    font-family: var(--font-heading);
    font-style: italic;
    font-size: 1.25rem;
    padding: 0.75rem 2rem;
    min-block-size: 44px;
    border-radius: var(--radius-sm);
    margin-block: var(--space-sm);
    transition:
      background-color var(--transition-speed) ease,
      color var(--transition-speed) ease;
  }

  .btn-cta:hover {
    background-color: var(--color-action);
    color: var(--color-text);
    opacity: 1;
  }

  @media (max-width: 640px) {
    .btn-cta {
      display: block;
      text-align: center;
    }
  }

  /* ── Embedded video (YouTube etc.) ── */
  .embed-video {
    position: relative;
    inline-size: min(100%, 42rem);
    margin-block: var(--space-md);
    margin-inline: auto;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 16 / 9;
  }

  .embed-video iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
  }

  /* ── Horizontal rules ── */
  hr {
    border: none;
    border-block-start: 1px solid var(--color-border);
    margin-block: var(--space-sm);
  }
}

/* ================================================================
   LANDING PAGE
   ================================================================ */
@layer landing {
  .landing {
    grid-column: 2;
  }

  .hero {
    text-align: center;
    padding-block: var(--space-lg);
    padding-inline: var(--space-md);
  }

  .hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-style: italic;
    color: var(--color-emphasis);
    margin-block-end: var(--space-sm);
  }

  .hero-subtitle {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    font-family: var(--font-heading);
    color: var(--color-text);
    font-style: italic;
  }

  /* ── CTA cards ── */
  .landing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
    margin-block-start: 0;
    margin-block-end: 0;
  }

  .landing-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 8px var(--color-shadow);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--color-text);
    transition:
      border-color var(--transition-speed) ease,
      box-shadow var(--transition-speed) ease;
  }

  .landing-card:hover {
    border-color: var(--color-action);
    box-shadow: 0 4px 16px var(--color-shadow);
    opacity: 1;
  }

  .landing-card h2 {
    font-size: 1.5rem;
    color: var(--color-action);
    margin-block: 0 var(--space-xs);
  }

  .landing-card p {
    margin-block-end: var(--space-sm);
  }

  .card-cta {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-action);
    font-weight: 600;
  }

  /* ── About section ── */
  .landing-about {
    margin-block: var(--space-lg);
    padding-block-start: var(--space-md);
    border-block-start: 1px solid var(--color-border);
  }

  .landing-about p {
    font-size: 1.125rem;
    margin-block-end: var(--space-sm);
  }
}