/* ==========================================================================
   BioTools - Base Styles (base.css)
   Reset, typography, utilities, scrollbar, selection, and focus styles.
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS RESET / NORMALIZE
   -------------------------------------------------------------------------- */
*,
*::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;
  font-size: 16px;
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: var(--line-height-normal);
  min-height: 100vh;
  overflow-x: hidden;
}

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

img {
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

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

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

ul,
ol {
  list-style: none;
}

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

hr {
  border: none;
  border-top: var(--border-width) solid var(--border-color);
}

/* --------------------------------------------------------------------------
   TYPOGRAPHY
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

h5 {
  font-size: var(--font-size-md);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  color: var(--text-secondary);
}

p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

small {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-tertiary);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-xs);
  color: var(--accent);
}

blockquote {
  border-left: 3px solid var(--primary);
  padding-left: var(--space-4);
  color: var(--text-secondary);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   SELECTION & FOCUS
   -------------------------------------------------------------------------- */
::selection {
  background-color: var(--selection-bg);
  color: var(--selection-text);
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* --------------------------------------------------------------------------
   SCROLLBAR
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

/* --------------------------------------------------------------------------
   UTILITY CLASSES — Text
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-left   { text-align: left; }

.text-primary   { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted     { color: var(--text-muted) !important; }
.text-accent    { color: var(--accent) !important; }
.text-success   { color: var(--success) !important; }
.text-warning   { color: var(--warning) !important; }
.text-danger    { color: var(--danger) !important; }

.text-sm   { font-size: var(--font-size-sm) !important; }
.text-base { font-size: var(--font-size-base) !important; }
.text-lg   { font-size: var(--font-size-lg) !important; }

.font-medium   { font-weight: var(--font-weight-medium) !important; }
.font-semibold { font-weight: var(--font-weight-semibold) !important; }
.font-bold     { font-weight: var(--font-weight-bold) !important; }

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

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   UTILITY CLASSES — Layout
   -------------------------------------------------------------------------- */
.flex         { display: flex; }
.flex-col     { display: flex; flex-direction: column; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-start   { display: flex; align-items: center; justify-content: flex-start; }
.flex-end     { display: flex; align-items: center; justify-content: flex-end; }
.flex-wrap    { flex-wrap: wrap; }
.flex-1       { flex: 1; }
.items-start  { align-items: flex-start; }
.items-center { align-items: center; }

.inline-flex  { display: inline-flex; align-items: center; }

.grid { display: grid; }

/* --------------------------------------------------------------------------
   UTILITY CLASSES — Spacing (gap, margin, padding)
   -------------------------------------------------------------------------- */
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.px-2 { padding-left: var(--space-2); padding-right: var(--space-2); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }

.w-full { width: 100%; }
.h-full { height: 100%; }

/* --------------------------------------------------------------------------
   UTILITY CLASSES — Visibility
   -------------------------------------------------------------------------- */
.hidden {
  display: none !important;
}

.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;
}

.visible { visibility: visible; }
.invisible { visibility: hidden; }

.overflow-hidden { overflow: hidden; }
.overflow-auto   { overflow: auto; }

/* --------------------------------------------------------------------------
   UTILITY CLASSES — Misc
   -------------------------------------------------------------------------- */
.rounded-sm   { border-radius: var(--radius-sm); }
.rounded-md   { border-radius: var(--radius-md); }
.rounded-lg   { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.cursor-pointer { cursor: pointer; }
.pointer-events-none { pointer-events: none; }

.relative { position: relative; }
.absolute { position: absolute; }

.no-select {
  -webkit-user-select: none;
  user-select: none;
}