/* ===================================================================
   SyncMyMind — base.css
   Design tokens, resets, and foundational styles.
   Editorial magazine aesthetic: monochrome UI, color only in data viz.
   =================================================================== */

/* --- Type Scale (fluid clamp) --- */
:root {
  --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,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* --- 4px Spacing System --- */
  --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;

  /* --- Font Families --- */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body:    'Source Serif 4', 'Source Serif Pro', Georgia, serif;
  --font-ui:      'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* --- Radius --- */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:     cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);

  /* --- Content widths --- */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;
  --content-full:    100%;

  /* === CHART / DATA VIZ COLOR PALETTE === */
  --chart-rose:     #D4758C;
  --chart-purple:   #9B7BB8;
  --chart-lavender: #7E8FCA;
  --chart-blue:     #5B9BD5;
  --chart-sky:      #6BC5D2;
  --chart-teal:     #5BB89A;
  --chart-olive:    #8FA860;
  --chart-green:    #5DAD5B;
  --chart-gold:     #B8A84C;
  --chart-orange:   #D4A24C;
  --chart-coral:    #D47B7B;
}

/* === LIGHT MODE (default) === */
:root, [data-theme="light"] {
  --color-bg:           #EBEBEB;
  --color-surface:      #F5F5F5;
  --color-surface-2:    #FFFFFF;
  --color-border:       #DCDCDC;
  --color-text:         #1A1A1A;
  --color-text-muted:   #666666;
  --color-text-faint:   #999999;
  --color-accent:       #1A1A1A;
  --color-accent-hover: #444444;
}

/* === DARK MODE === */
[data-theme="dark"] {
  --color-bg:           #1A1A1A;
  --color-surface:      #242424;
  --color-surface-2:    #2E2E2E;
  --color-border:       #3A3A3A;
  --color-text:         #E5E5E5;
  --color-text-muted:   #999999;
  --color-text-faint:   #666666;
  --color-accent:       #E5E5E5;
  --color-accent-hover: #CCCCCC;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:           #1A1A1A;
    --color-surface:      #242424;
    --color-surface-2:    #2E2E2E;
    --color-border:       #3A3A3A;
    --color-text:         #E5E5E5;
    --color-text-muted:   #999999;
    --color-text-faint:   #666666;
    --color-accent:       #E5E5E5;
    --color-accent-hover: #CCCCCC;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
  }
}

/* ===================================================================
   RESETS
   =================================================================== */

*, *::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: 1.6;
  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: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: rgba(26, 26, 26, 0.15);
  color: var(--color-text);
}

[data-theme="dark"] ::selection {
  background: rgba(229, 229, 229, 0.2);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  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;
  }
}

button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; }

a, button, [role="button"], [role="link"], input, textarea, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.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;
}