/* base.css — PatentInsight Pro — Foundation Reset & Tokens */

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

/* ===== HTML Defaults ===== */
html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: 4rem;
}

/* ===== Body Defaults ===== */
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* ===== Media Defaults ===== */
img, picture, video {
  display: block;
  max-width: 100%;
  height: auto;
}

svg {
  overflow: visible;
}

ul[role="list"], ol[role="list"] {
  list-style: none;
}

/* ===== Form Defaults ===== */
input, button, textarea, select {
  font: inherit;
  color: inherit;
}

/* ===== Heading Defaults ===== */
h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.15;
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

/* ===== Selection ===== */
::selection {
  background: rgba(13, 148, 136, 0.2);
  color: var(--color-text);
}

/* ===== Focus Ring ===== */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 0.375rem;
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== Button Reset ===== */
button {
  cursor: pointer;
  background: none;
  border: none;
}

/* ===== Table Defaults ===== */
table {
  border-collapse: collapse;
  width: 100%;
}

/* ===== SR Only ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===== Type Scale ===== */
:root {
  --text-xs:   clamp(0.7rem,  0.65rem + 0.25vw, 0.8rem);
  --text-sm:   clamp(0.8rem,  0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.875rem, 0.825rem + 0.25vw, 1rem);
  --text-lg:   clamp(1.05rem, 0.95rem + 0.5vw, 1.35rem);
  --text-xl:   clamp(1.35rem, 1rem + 1vw, 1.875rem);
  --text-2xl:  clamp(1.75rem, 1.1rem + 2vw, 2.75rem);
  --text-3xl:  clamp(2.25rem, 1rem + 3.5vw, 4rem);
}

/* ===== Spacing ===== */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* ===== Radius ===== */
:root {
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.25rem;
  --radius-full: 9999px;
}

/* ===== Transitions ===== */
:root {
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Shadows ===== */
:root {
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md:  0 4px 6px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg:  0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
  --shadow-xl:  0 20px 50px rgba(0, 0, 0, 0.1), 0 8px 20px rgba(0, 0, 0, 0.06);
}