/* ================================
   BASE — tokens + reset
   MUSE Security WorX Australia
   Institutional B2B palette:
   ink navy neutrals + steel-cyan primary
   ================================ */

:root {
  /* ------------- TYPE SCALE ------------- */
  --text-xs:   clamp(0.75rem,  0.7rem + 0.25vw,  0.8125rem);   /* 12 → 13 */
  --text-sm:   clamp(0.8125rem, 0.78rem + 0.2vw, 0.875rem);    /* 13 → 14 */
  --text-base: clamp(1rem,     0.96rem + 0.2vw,  1.0625rem);   /* 16 → 17 */
  --text-md:   clamp(1.0625rem, 1rem + 0.35vw,   1.1875rem);   /* 17 → 19 */
  --text-lg:   clamp(1.25rem,  1.1rem + 0.7vw,   1.5rem);      /* 20 → 24 */
  --text-xl:   clamp(1.5rem,   1.25rem + 1.2vw,  2.125rem);    /* 24 → 34 */
  --text-2xl:  clamp(2rem,     1.4rem + 2.4vw,   3.25rem);     /* 32 → 52 */
  --text-hero: clamp(2.25rem,  1.6rem + 2.6vw,   3.75rem);     /* 36 → 60 */

  /* ------------- SPACING ------------- */
  --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;

  /* ------------- RADII ------------- */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* ------------- FONTS ------------- */
  --font-display: 'Inter Tight', 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-body:    'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* ------------- CONTENT WIDTHS ------------- */
  --content-narrow: 720px;
  --content-default: 1120px;
  --content-wide: 1200px;

  /* ------------- MOTION ------------- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================================
   LIGHT MODE — institutional ink & paper
   Palette:
     bg      #F6F7F8  paper
     surface #FFFFFF  raised card
     ink     #0E1B2C  deep navy
     text    #14202F  near-black navy
     muted   #57657A
     border  #DDE3EA
     primary #0F5566  steel-cyan (custom accent, not Nexus)
   ========================================================= */

:root,
[data-theme='light'] {
  /* Surfaces */
  --color-bg:              #F6F7F8;
  --color-surface:         #FFFFFF;
  --color-surface-2:       #FAFBFC;
  --color-surface-offset:  #EEF1F4;
  --color-surface-strong:  #0E1B2C;   /* deep navy panel */

  /* Text */
  --color-text:            #14202F;
  --color-text-muted:      #57657A;
  --color-text-faint:      #8894A5;
  --color-text-inverse:    #E9EDF2;
  --color-text-on-strong:  #F1F4F8;

  /* Rules & borders */
  --color-border:          #DDE3EA;
  --color-border-strong:   #C4CDD8;
  --color-divider:         #E7ECF1;

  /* Primary — steel-cyan (institutional, not marketing-cyan) */
  --color-primary:         #0F5566;
  --color-primary-hover:   #0B4351;
  --color-primary-active:  #08333E;
  --color-primary-tint:    #E6EEF1;
  --color-primary-on:      #FFFFFF;

  /* Amber accent — used sparingly, structural highlights only */
  --color-accent-amber:    #B4791C;

  /* Shadows — subtle, no drama */
  --shadow-xs: 0 1px 2px rgba(14, 27, 44, 0.05);
  --shadow-sm: 0 2px 6px rgba(14, 27, 44, 0.06);
  --shadow-md: 0 8px 24px rgba(14, 27, 44, 0.08);
}

/* =========================================================
   DARK MODE — deep ink with paper text
   ========================================================= */

[data-theme='dark'] {
  --color-bg:              #0B1420;
  --color-surface:         #101B29;
  --color-surface-2:       #142132;
  --color-surface-offset:  #182A3E;
  --color-surface-strong:  #061020;

  --color-text:            #E9EDF2;
  --color-text-muted:      #92A0B3;
  --color-text-faint:      #5D6B7E;
  --color-text-inverse:    #14202F;
  --color-text-on-strong:  #E9EDF2;

  --color-border:          #24344A;
  --color-border-strong:   #2F4363;
  --color-divider:         #1B2A3E;

  --color-primary:         #4FA6B8;
  --color-primary-hover:   #6BBDCE;
  --color-primary-active:  #86D0DF;
  --color-primary-tint:    #16303A;
  --color-primary-on:      #061020;

  --color-accent-amber:    #E1A34E;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #0B1420;
    --color-surface:         #101B29;
    --color-surface-2:       #142132;
    --color-surface-offset:  #182A3E;
    --color-surface-strong:  #061020;
    --color-text:            #E9EDF2;
    --color-text-muted:      #92A0B3;
    --color-text-faint:      #5D6B7E;
    --color-text-inverse:    #14202F;
    --color-text-on-strong:  #E9EDF2;
    --color-border:          #24344A;
    --color-border-strong:   #2F4363;
    --color-divider:         #1B2A3E;
    --color-primary:         #4FA6B8;
    --color-primary-hover:   #6BBDCE;
    --color-primary-active:  #86D0DF;
    --color-primary-tint:    #16303A;
    --color-primary-on:      #061020;
    --color-accent-amber:    #E1A34E;
  }
}

/* ============ RESET ============ */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

button {
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--color-text);
}

p {
  text-wrap: pretty;
  max-width: 68ch;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--color-primary-tint);
  color: var(--color-text);
}

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

.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--color-surface);
  color: var(--color-text);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  z-index: 100;
}
.skip-link:focus { top: 8px; }

a, button, input, textarea, select {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}