/* ============================================================
   Daily Calculator — layout.css
   Page shell, containers, sections, grids, breadcrumbs
   ============================================================ */

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 640px) {
  .container { padding-inline: var(--space-6); }
}

@media (min-width: 1024px) {
  .container { padding-inline: var(--space-8); }
}

.container--narrow { max-width: var(--container-narrow); }
.container--wide   { max-width: 1400px; }

/* ---------- Page shell ---------- */
.site {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1 1 auto;
  padding-block: var(--space-6) var(--space-12);
}

@media (min-width: 768px) {
  .site-main { padding-block: var(--space-8) var(--space-16); }
}

/* ---------- Sections ---------- */
.section {
  padding-block: var(--space-10);
}

@media (min-width: 768px) {
  .section { padding-block: var(--space-16); }
}

.section--tight  { padding-block: var(--space-8); }
.section--subtle { background-color: var(--color-bg-subtle); }
.section--muted  { background-color: var(--color-bg-muted); }

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-8);
}

.section-header h2 { margin-bottom: var(--space-3); }

.section-header p {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  margin: 0;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--color-bg-subtle) 0%, var(--color-white) 100%);
  padding-block: var(--space-10) var(--space-12);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .hero { padding-block: var(--space-16) var(--space-20); }
}

.hero h1 {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-4);
  color: var(--color-primary-dark);
  letter-spacing: -0.02em;
}

@media (min-width: 640px) {
  .hero h1 { font-size: var(--fs-3xl); }
}

@media (min-width: 1024px) {
  .hero h1 { font-size: var(--fs-4xl); }
}

.hero .lead {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto var(--space-8);
  line-height: var(--lh-base);
}

@media (min-width: 768px) {
  .hero .lead { font-size: var(--fs-lg); }
}

/* ---------- Grids ---------- */
.grid-auto {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

@media (min-width: 480px) {
  .grid-auto { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .grid-auto { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1200px) {
  .grid-auto--wide { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.grid-cards {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 640px) {
  .grid-cards { gap: var(--space-5); grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .grid-cards { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.grid-categories {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .grid-categories { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid-categories {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-5);
  }
}

/* ---------- Two-column content ---------- */
.layout-split {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .layout-split {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: var(--space-8);
    align-items: start;
  }
}

.layout-split__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  padding-block: var(--space-4);
  font-size: var(--fs-sm);
}

.breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--color-border-strong);
  margin-right: var(--space-1);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-text);
  font-weight: var(--fw-medium);
}

/* ---------- Stack helpers ---------- */
.stack > * + *      { margin-top: var(--space-4); }
.stack-sm > * + *   { margin-top: var(--space-2); }
.stack-lg > * + *   { margin-top: var(--space-8); }