/* ============================================================
   BASE.CSS — Reset, Typography, Global Element Styles
   ============================================================ */

/* ——— CSS Reset ——— */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--lh-body);
  color: var(--color-deep);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-forest);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-amber);
}

a:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

button:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ——— Typography ——— */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: var(--lh-h2);
  color: var(--color-deep);
}

h1 { font-size: var(--text-h2); font-weight: 600; }
h2 { font-size: var(--text-h2); font-weight: 600; }
h3 { font-size: var(--text-h3); font-weight: 500; line-height: var(--lh-h3); }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

strong { font-weight: 600; }
em { font-style: italic; }

/* ——— Section Heading Pattern ——— */
.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-forest);
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: 600;
  color: var(--color-deep);
  line-height: var(--lh-h2);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: 1.1rem;
  color: var(--color-slate);
  line-height: var(--lh-body);
  max-width: 56ch;
}

/* ——— Split Rule Divider ——— */
.split-rule {
  display: flex;
  height: 3px;
  border: none;
  margin: 0;
  gap: 0;
}

.split-rule::before,
.split-rule,
.split-rule::after {
  content: '';
  display: block;
}

/* Used as a standalone element */
hr.split-rule {
  width: 100%;
  height: 3px;
  background: linear-gradient(
    to right,
    var(--color-forest) 33.3%,
    var(--color-deep)   33.3% 66.6%,
    var(--color-amber)  66.6%
  );
  border: none;
  margin: 0;
}

/* ——— Button Styles ——— */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background-color var(--transition-base),
              color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--color-forest);
  color: var(--color-white);
  border-color: var(--color-forest);
}

.btn-primary:hover {
  background-color: #245c42;
  border-color: #245c42;
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-outline:hover {
  background-color: var(--color-white);
  color: var(--color-deep);
  box-shadow: var(--shadow-md);
}

.btn-outline-dark {
  background-color: transparent;
  color: var(--color-deep);
  border-color: var(--color-deep);
}

.btn-outline-dark:hover {
  background-color: var(--color-deep);
  color: var(--color-white);
}

.btn-amber {
  background-color: var(--color-amber);
  color: var(--color-white);
  border-color: var(--color-amber);
}

.btn-amber:hover {
  background-color: #c96a2a;
  border-color: #c96a2a;
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

/* ——— Badge ——— */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-confirmed {
  background-color: var(--color-forest-10);
  color: var(--color-forest);
}

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

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

.mt-sm { margin-top: 0.5rem; }
.mt-md { margin-top: 1rem; }
.mt-lg { margin-top: 2rem; }