/* =========================================================
   Spanish Despacio — base stylesheet
   Palette matches the DELE A2 practice app (see README for
   the accessibility notes on why some colors are only used
   as backgrounds/accents rather than as text colors).
   ========================================================= */

:root {
  /* --- Brand colors (from DELE app SCSS) --- */
  --color-bg: #92a88a;          /* $body-bg   - page background */
  --color-panel: #ffffff;       /* $back-color - card/panel background */
  --color-brand: #478851;       /* $body-color - large headings on white */
  --color-brand-dark: #33663b;  /* AA-safe variant for small text/links/buttons */
  --color-accent: #00b300;      /* $bcg-green - decorative accent only */
  --color-selected: #f39b37;    /* $selected-color - button/tab backgrounds */
  --color-selected-dark: #b5691a; /* AA-safe variant if used as text on white */
  --color-tab: #f94261;         /* $font-tab - decorative accent (underlines, icons) */
  --color-tab-dark: #c62348;    /* AA-safe variant if used as text on white */

  /* --- Neutral text --- */
  --color-text: #222222;        /* body copy: 15.9:1 on white, 6.2:1 on --color-bg */
  --color-text-inverse: #ffffff;

  --font-base: 'Segoe UI', Arial, Helvetica, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --radius: 10px;
  --max-width: 1100px;
  --focus-ring: 3px solid var(--color-selected-dark);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
body {
  margin: 0;
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-brand-dark); text-underline-offset: 2px; }
a:hover { color: var(--color-tab-dark); }
:focus-visible { outline: var(--focus-ring); outline-offset: 2px; }

/* --- Skip link (accessibility) --- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-panel);
  color: var(--color-text);
  padding: var(--space-2) var(--space-3);
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* --- Header / nav --- */
.site-header {
  background-color: var(--color-panel);
  border-bottom: 4px solid var(--color-brand);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
}
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}
.site-logo-img {
  display: block;
  height: 48px;
  width: auto;
}
.site-tagline {
  display: block;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--color-brand);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  font-size: 1rem;
  cursor: pointer;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
}
.main-nav a {
  text-decoration: none;
  color: var(--color-brand-dark);
  font-weight: 600;
  padding: var(--space-2) 0;
  border-bottom: 3px solid transparent;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  border-bottom-color: var(--color-tab);
  color: var(--color-tab-dark);
}

@media (max-width: 700px) {
  .nav-toggle { display: inline-block; }
  .main-nav {
    display: none;
    width: 100%;
  }
  .main-nav.is-open { display: block; }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }
  .main-nav li { border-top: 1px solid var(--color-bg); }
  .main-nav a { display: block; padding: var(--space-3); }
  .site-header .container { flex-wrap: wrap; }
}

/* --- Hero / intro sections --- */
.hero {
  padding-block: var(--space-5);
  text-align: center;
  color: var(--color-text-inverse);
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  margin-bottom: var(--space-2);
}
.hero p {
  font-size: 1.1rem;
  max-width: 60ch;
  margin-inline: auto;
}

/* --- Cards / panels --- */
.panel {
  background-color: var(--color-panel);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin-block: var(--space-4);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
.panel h2 {
  color: var(--color-brand);
  margin-top: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}
.card {
  background-color: var(--color-panel);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
.card h3 { color: var(--color-brand); }

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: inherit;
  font-weight: 600;
  font-size: 1rem;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
  text-align: center;
}
.btn-primary {
  background-color: var(--color-selected);
  color: var(--color-text); /* dark text on orange: 7.2:1 */
}
.btn-primary:hover { background-color: var(--color-selected-dark); color: var(--color-text-inverse); }
.btn-secondary {
  background-color: transparent;
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
}
.btn-secondary:hover { background-color: var(--color-brand); color: var(--color-text-inverse); }

/* --- DELE iframe page --- */
.iframe-wrapper {
  position: relative;
  width: 100%;
  min-height: 80vh;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
.iframe-wrapper iframe {
  width: 100%;
  height: 80vh;
  border: none;
  display: block;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-brand-dark);
  color: var(--color-text-inverse);
  padding-block: var(--space-4);
  margin-top: var(--space-5);
}
.site-footer a { color: var(--color-text-inverse); text-decoration: underline; }
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.9rem;
}

/* --- Utility --- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}