/* ============================================
   BASE.CSS — The Impact CTO
   Reset, tokens, dark mode, base styles
   ============================================ */

/* --- Design Tokens -------------------------------- */
:root {
  /* Brand */
  --brand:         #E8891D;
  --brand-dark:    #c96d08;
  --brand-deeper:  #a65500;
  --brand-light:   #f9c98a;
  --brand-bg:      #fdf3e3;

  /* Type scale — fluid with clamp() */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(2.8rem,   0.5rem  + 7vw,    7rem);

  /* Spacing — 4px grid */
  --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;

  /* Content widths */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  /* Radius */
  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* Easing */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:    cubic-bezier(0.4, 0, 1, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Font */
  --font-body:    'Plus Jakarta Sans', system-ui, sans-serif;
  --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
}

/* --- Light mode surfaces -------------------------- */
:root, [data-theme="light"] {
  --color-bg:              #f9f7f4;
  --color-surface:         #ffffff;
  --color-surface-2:       #f4f2ef;
  --color-surface-offset:  #ede9e4;
  --color-divider:         #e0dbd4;
  --color-border:          #d4cfc8;

  --color-text:            #1a1714;
  --color-text-muted:      #6b6460;
  --color-text-faint:      #b0aaa3;
  --color-text-inverse:    #f9f7f4;

  --shadow-sm: 0 1px 3px rgba(20, 15, 8, 0.07);
  --shadow-md: 0 4px 16px rgba(20, 15, 8, 0.09);
  --shadow-lg: 0 12px 40px rgba(20, 15, 8, 0.12);
}

/* --- Dark mode ------------------------------------ */
[data-theme="dark"] {
  --color-bg:              #161412;
  --color-surface:         #1d1a17;
  --color-surface-2:       #231f1b;
  --color-surface-offset:  #2a2521;
  --color-divider:         #2f2b26;
  --color-border:          #3a3530;

  --color-text:            #e8e3dc;
  --color-text-muted:      #9a938a;
  --color-text-faint:      #5e5852;
  --color-text-inverse:    #1a1714;

  --brand:         #f0a040;
  --brand-dark:    #e8891d;
  --brand-bg:      #2a2015;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #161412;
    --color-surface:         #1d1a17;
    --color-surface-2:       #231f1b;
    --color-surface-offset:  #2a2521;
    --color-divider:         #2f2b26;
    --color-border:          #3a3530;
    --color-text:            #e8e3dc;
    --color-text-muted:      #9a938a;
    --color-text-faint:      #5e5852;
    --color-text-inverse:    #1a1714;
    --brand:         #f0a040;
    --brand-dark:    #e8891d;
    --brand-bg:      #2a2015;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
  }
}

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

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: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.1;
  font-family: var(--font-display);
}

p, li, figcaption {
  text-wrap: pretty;
}

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

::selection {
  background: color-mix(in oklab, var(--brand) 25%, transparent);
  color: var(--color-text);
}

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

@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;
  }
}

.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;
}