/* ══════════════════════════════════════════
   FIRE — BASE STYLES
   ══════════════════════════════════════════ */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text);
  background: var(--bg);
  transition: background var(--duration-slow) var(--ease-in-out),
              color var(--duration-slow) var(--ease-in-out);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

h1 strong, h2 strong, h3 strong, h4 strong {
  font-weight: 600;
}

.card h4 {
  font-weight: 500;
  letter-spacing: -0.01em;
}

p {
  color: var(--text-2);
  max-width: 640px;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: opacity var(--duration-fast) var(--ease-out);
}

a:hover {
  opacity: 0.8;
}

code, .mono {
  font-family: var(--mono);
}

/* --- Labels --- */
.label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

/* --- Layout --- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: 720px;
}

.container--wide {
  max-width: 1320px;
}

/* --- Sections --- */
section {
  padding: var(--space-24) 0;
}

/* --- Anchor offset for fixed nav --- */
[id] {
  scroll-margin-top: 72px;
}

/* --- Form elements --- */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="password"],
input[type="url"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-out);
  -webkit-appearance: none;
  appearance: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--border-hover);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-3);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
}

textarea {
  min-height: 100px;
  resize: vertical;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  min-height: 44px;
  font-family: var(--sans);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out),
              background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              color var(--duration-normal) var(--ease-out);
  text-decoration: none;
}

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

.btn--primary:hover {
  opacity: 0.85;
}

.btn--secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--secondary:hover {
  border-color: var(--border-hover);
  opacity: 1;
}

/* Marketing modifier: glow + lift. Applied on top of --primary or --secondary. */
.btn--marketing:hover {
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-1px);
  opacity: 1;
}
.btn--marketing:active {
  transform: translateY(0.5px);
}

.btn--ghost {
  background: transparent;
  color: var(--text-3);
  border: 1px solid var(--border);
  cursor: default;
  pointer-events: none;
}

/* Product accent buttons */
.btn--invoice {
  background: var(--invoice);
  color: var(--white);
  border-color: var(--invoice);
}
.btn--invoice:hover {
  opacity: 0.85;
}

.btn--payroll {
  background: var(--payroll);
  color: var(--white);
  border-color: var(--payroll);
}
.btn--payroll:hover {
  opacity: 0.85;
}

.btn--books {
  background: var(--books);
  color: var(--white);
  border-color: var(--books);
}
.btn--books:hover {
  opacity: 0.85;
}

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-6);
  transition: border-color var(--duration-normal) var(--ease-out);
}

.card:hover {
  border-color: var(--border-hover);
}

/* --- Icons --- */
.icon {
  color: var(--accent);
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

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

/* --- Skip link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-6);
  background: var(--accent);
  color: var(--white);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  z-index: 1000;
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-4);
}

/* --- Focus --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

.btn--primary:focus-visible {
  outline-color: var(--text);
}

/* --- Code panels (shared across pages) --- */
.code-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-8) var(--space-8) var(--space-6);
  overflow-x: auto;
  position: relative;
}

.code-panel__label {
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--text-3);
  user-select: none;
  cursor: pointer;
  transition: color var(--duration-normal) var(--ease-out);
}

.code-panel__label:hover {
  color: var(--text-2);
}

.code-panel__label.copied {
  color: var(--green);
}

.code-panel__copy {
  display: none;
}

.code-panel pre {
  margin: 0;
}

.code-panel code {
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--text-2);
}

/* --- Syntax tokens (shared across pages) --- */
.code-key { color: var(--text); }
.code-string { color: var(--cyan); }
.code-comment { color: var(--text-3); }
.code-method { color: var(--text); }
.code-punctuation { color: var(--text-3); }
.code-keyword { color: var(--accent); }

/* --- Selection --- */
::selection {
  background: var(--accent-dim);
  color: var(--text);
}