/* qse-base.css — Qase base styles, typography, utilities, buttons */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--qse-font-sans);
  font-size: var(--qse-body);
  line-height: 1.75;
  color: var(--qse-fg-on-light-primary);
  background: var(--qse-bg-light);
}

body.qse-page--dark-top { background: var(--qse-bg-dark); }
body.qse-page--light-top { background: var(--qse-bg-light); }

img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; }

/* ---- Containers ---- */
.qse-container {
  max-width: var(--qse-container-max);
  margin: 0 auto;
  padding: 0 var(--qse-section-pad-h);
}

/* ---- Sections ---- */
.qse-section {
  padding: var(--qse-section-pad-v) var(--qse-section-pad-h);
}
.qse-section--light     { background: var(--qse-bg-light); }
.qse-section--white     { background: var(--qse-bg-white); }
.qse-section--light-alt { background: var(--qse-bg-light-alt); }
.qse-section--dark      { background: var(--qse-bg-dark); }
.qse-section--dark-alt  { background: var(--qse-bg-dark-alt); }

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--qse-font-serif);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.qse-section--light     h1,
.qse-section--light     h2,
.qse-section--light     h3,
.qse-section--white     h1,
.qse-section--white     h2,
.qse-section--white     h3,
.qse-section--light-alt h1,
.qse-section--light-alt h2,
.qse-section--light-alt h3 { color: var(--qse-fg-on-light-primary); }

.qse-section--dark      h1,
.qse-section--dark      h2,
.qse-section--dark      h3,
.qse-section--dark-alt  h1,
.qse-section--dark-alt  h2,
.qse-section--dark-alt  h3 { color: var(--qse-fg-on-dark-primary); }

.qse-section--light     p,
.qse-section--white     p,
.qse-section--light-alt p { color: var(--qse-fg-on-light-secondary); }

.qse-section--dark      p,
.qse-section--dark-alt  p { color: var(--qse-fg-on-dark-secondary); }

/* ---- Eyebrows ---- */
.qse-eyebrow {
  font-family: var(--qse-font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 12px;
}
.qse-section--light     .qse-eyebrow,
.qse-section--white     .qse-eyebrow,
.qse-section--light-alt .qse-eyebrow { color: var(--qse-green-aa-light); }
.qse-section--dark      .qse-eyebrow,
.qse-section--dark-alt  .qse-eyebrow { color: var(--qse-green-aa-dark); }

/* ---- Buttons ---- */
.qse-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--qse-font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  padding: 14px 28px;
  border-radius: var(--qse-radius-md);
  border: 2px solid transparent;
  text-decoration: none;
  transition: background 0.18s, color 0.18s, border-color 0.18s, box-shadow 0.18s;
  cursor: pointer;
  white-space: nowrap;
}

.qse-btn--primary {
  background: var(--qse-green-aa-light);
  color: #fff;
  border-color: var(--qse-green-aa-light);
}
.qse-btn--primary:hover {
  background: #175633;
  border-color: #175633;
  box-shadow: 0 4px 14px rgba(31,107,68,0.35);
}

.qse-btn--outline-dark {
  background: transparent;
  color: var(--qse-fg-on-dark-primary);
  border-color: rgba(238,242,247,0.55);
}
.qse-btn--outline-dark:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(238,242,247,0.85);
}

.qse-btn--outline-light {
  background: transparent;
  color: var(--qse-navy);
  border-color: var(--qse-divider);
}
.qse-btn--outline-light:hover {
  border-color: var(--qse-navy);
  background: var(--qse-bg-light-alt);
}

.qse-btn--ghost-dark {
  background: transparent;
  color: var(--qse-fg-on-dark-primary);
  border-color: transparent;
}
.qse-btn--ghost-dark:hover { background: rgba(255,255,255,0.06); }

.qse-btn--sm { padding: 10px 20px; font-size: 0.875rem; }

/* ---- Fade-in ---- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ---- Cards ---- */
.qse-card {
  background: var(--qse-bg-white);
  border-radius: var(--qse-radius-lg);
  box-shadow: var(--qse-shadow-card);
  padding: 32px;
  transition: box-shadow 0.18s;
}
.qse-card:hover { box-shadow: var(--qse-shadow-card-hover); }

/* ---- Tags / Badges ---- */
.qse-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--qse-bg-light-alt);
  color: var(--qse-green-aa-light);
  border: 1px solid var(--qse-divider);
}

/* ---- Grid utility ---- */
.qse-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--qse-gap-lg);
}
.qse-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--qse-gap-md);
}

@media (max-width: 900px) {
  .qse-grid-2 { grid-template-columns: 1fr; }
  .qse-grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .qse-grid-3 { grid-template-columns: 1fr; }
}

/* ---- Text link ---- */
.qse-text-link {
  color: var(--qse-green-aa-light);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.qse-text-link:hover { text-decoration: underline; }

/* ---- Divider ---- */
hr.qse-divider {
  border: none;
  border-top: 1px solid var(--qse-divider);
  margin: 40px 0;
}

/* ---- Inline mock terminal ---- */
.qse-mock {
  background: #0F1D2E;
  border-radius: var(--qse-radius-md);
  overflow: hidden;
  font-family: var(--qse-font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
}
.qse-mock__chrome {
  background: #1E3050;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.qse-mock__dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.qse-mock__dot--red    { background: #E55A5A; }
.qse-mock__dot--yellow { background: #E5B45A; }
.qse-mock__dot--green  { background: #4DC484; }
.qse-mock__title {
  font-family: var(--qse-font-sans);
  font-size: 0.75rem;
  color: var(--qse-fg-on-dark-muted);
  margin-left: 8px;
}
.qse-mock__body {
  padding: 20px;
  color: #A8BCCF;
  white-space: normal;
}
.qse-mock__body table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--qse-font-mono);
  font-size: 0.8125rem;
  color: #A8BCCF;
}
.qse-mock__body th {
  text-align: left;
  padding: 6px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  color: var(--qse-fg-on-dark-muted);
  font-weight: 500;
}
.qse-mock__body td {
  padding: 6px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.qse-mock__body .accent { color: var(--qse-green-aa-dark); }
.qse-mock__body .dim    { color: var(--qse-fg-on-dark-muted); }

/* ---- Responsive helpers ---- */
@media (max-width: 768px) {
  .qse-section { padding: 56px 20px; }
  .qse-btn { padding: 12px 22px; font-size: 0.875rem; }
}

/* ---- Skip link a11y ---- */
.qse-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  background: var(--qse-navy);
  color: #fff;
  padding: 8px 16px;
  font-size: 0.875rem;
}
.qse-skip-link:focus { left: 0; }