/* ============================================
   BuildGuide — Reset & Base Styles
   ============================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

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

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

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

ul,
ol {
  list-style: none;
}

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

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

table {
  border-collapse: collapse;
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  line-height: var(--leading-tight);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
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 {
  margin-bottom: var(--space-4);
}

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

small {
  font-size: var(--text-sm);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

/* ---- Containers ---- */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

.container--sm {
  max-width: var(--container-sm);
}

.container--md {
  max-width: var(--container-md);
}

/* ---- Utility classes ---- */
.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;
}

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

.text-right {
  text-align: right;
}

.hidden {
  display: none !important;
}

.visually-hidden {
  visibility: hidden;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

/* ---- Form primitives ---- */
.form-row {
  display: flex;
  gap: var(--space-4);
}

@media (max-width: 767px) {
  .form-row {
    flex-direction: column;
  }
}

.form-row > * {
  flex: 1;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
}

.input {
  display: block;
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
}

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

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-200);
}

.input--error {
  border-color: var(--color-danger);
}

.input--error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

textarea.input {
  min-height: 120px;
  resize: vertical;
}

select.input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8.825c-.2 0-.4-.075-.55-.225L1.175 4.325a.783.783 0 01.012-1.1.783.783 0 011.1.012L6 6.95l3.712-3.713a.783.783 0 011.1-.012c.305.3.308.793.013 1.1L6.55 8.6A.774.774 0 016 8.825z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 12px;
  padding-right: 2.5rem;
}

.form-error {
  font-size: var(--text-sm);
  color: var(--color-danger);
  margin-top: var(--space-1);
}

.form-hint {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ---- Checkbox ---- */
.checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-gray-700);
}

.checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  appearance: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.checkbox input[type="checkbox"]:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='white' d='M10.28 2.28a.75.75 0 01.03 1.06l-5.25 5.5a.75.75 0 01-1.072.013L1.47 6.31a.75.75 0 011.06-1.06l2.013 2.013L9.22 2.31a.75.75 0 011.06-.03z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-3);
}

/* ---- Range input ---- */
.range-input {
  width: 100%;
  accent-color: var(--color-primary);
}

.range-input__labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ---- Prose (for CMS content) ---- */
.prose {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-700);
}

.prose h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.prose h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.prose p {
  margin-bottom: var(--space-4);
}

.prose ul,
.prose ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.prose ul {
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose a {
  text-decoration: underline;
}

.prose img {
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
}

.prose blockquote {
  border-left: 4px solid var(--color-primary-200);
  padding-left: var(--space-4);
  color: var(--color-text-secondary);
  font-style: italic;
  margin: var(--space-6) 0;
}