/* =============================================================
   style.css — Reset, Base Styles, Utilities
   Import order matters: tokens → this file → components.css
   ============================================================= */

/* Section: Imports */
@import url('tokens.css');
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600&family=DM+Serif+Display&display=swap');


/* Section: Skip to main content */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-2) var(--space-4);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  z-index: 9999;
}

.skip-link:focus {
  top: 0;
}


/* =============================================================
   Section: Modern CSS Reset
   ============================================================= */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px; /* base for rem calculations */
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}


/* =============================================================
   Section: Typography — Base
   ============================================================= */

h1,
h2 {
  font-family: var(--font-heading);
  font-weight: var(--weight-regular); /* DM Serif Display is display weight */
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h3,
h4,
h5,
h6 {
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  color: var(--color-text);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  line-height: var(--leading-normal);
  color: var(--color-text);
}

strong { font-weight: var(--weight-semibold); }


/* =============================================================
   Section: Layout Utilities
   ============================================================= */

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

/* Section: Section spacing */
.section {
  padding-block: var(--section-padding-y-mobile);
}

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

.section--surface {
  background-color: var(--color-surface);
}

/* Section: Grid helpers */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1280px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Flex helpers */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}


/* =============================================================
   Section: Button Utilities
   ============================================================= */

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  transition: background-color var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
}

.btn-primary:hover,
.btn-secondary:hover {
  transform: translateY(-1px);
}

.btn-primary:active,
.btn-secondary:active {
  transform: translateY(0);
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* Primary — sage green fill */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

/* Secondary — outlined */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary-light);
}

/* Accent variant */
.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn-accent:hover {
  background-color: var(--color-accent-dark);
}


/* =============================================================
   Section: Typography Utilities
   ============================================================= */

.text-muted {
  color: var(--color-text-muted);
}

.text-primary {
  color: var(--color-primary);
}

.text-accent {
  color: var(--color-accent);
}

.text-center { text-align: center; }
.text-left   { text-align: left; }

.text-xs   { font-size: var(--text-xs); }
.text-sm   { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg   { font-size: var(--text-lg); }
.text-xl   { font-size: var(--text-xl); }

/* Section label — small uppercase overline above headings */
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}


/* =============================================================
   Section: Spacing Utilities
   ============================================================= */

.mt-auto { margin-top: auto; }
.mb-4    { margin-bottom: var(--space-4); }
.mb-6    { margin-bottom: var(--space-6); }
.mb-8    { margin-bottom: var(--space-8); }


/* =============================================================
   Section: Visibility Utilities
   ============================================================= */

/* Visually hidden but accessible to screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Show only on mobile */
.mobile-only {
  display: block;
}

@media (min-width: 768px) {
  .mobile-only { display: none; }
}

/* Hide on mobile */
.desktop-only {
  display: none;
}

@media (min-width: 768px) {
  .desktop-only { display: block; }
}


/* =============================================================
   Section: Divider
   ============================================================= */

.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-8);
}


/* =============================================================
   Section: Focus styles (global)
   ============================================================= */

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}