/* ============================================
   BASE CSS — Clarity Accounting & HR Services
   ============================================ */

:root,
[data-theme='light'] {
  /* Type Scale */
  --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);

  /* 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;

  /* Surfaces — Deep Navy/Slate professional palette */
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-surface-2: #f9fafb;
  --color-surface-offset: #eef0f4;
  --color-surface-offset-2: #e8eaee;
  --color-surface-dynamic: #dde0e6;
  --color-divider: #d2d6de;
  --color-border: #c8cdd8;

  /* Text */
  --color-text: #1a2035;
  --color-text-muted: #5a6272;
  --color-text-faint: #9aa0af;
  --color-text-inverse: #f9fafb;

  /* Primary — Navy */
  --color-primary: #1e3a5f;
  --color-primary-hover: #152d4e;
  --color-primary-active: #0e2038;
  --color-primary-highlight: #d0daea;

  /* Accent — Gold */
  --color-accent: #b8832a;
  --color-accent-hover: #9a6b1e;
  --color-accent-active: #7c5215;
  --color-accent-highlight: #f5e8d0;

  /* Secondary — Slate Blue */
  --color-secondary: #3d5a8a;
  --color-secondary-hover: #2e4570;
  --color-secondary-active: #1f3056;
  --color-secondary-highlight: #d5ddf0;

  /* Success */
  --color-success: #2e7d50;
  --color-success-highlight: #d0ead9;

  /* 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);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(30,58,95,0.08);
  --shadow-md: 0 4px 16px rgba(30,58,95,0.10);
  --shadow-lg: 0 12px 40px rgba(30,58,95,0.14);

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

  /* Fonts */
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
}

[data-theme='dark'] {
  --color-bg: #0f1520;
  --color-surface: #141c2d;
  --color-surface-2: #192235;
  --color-surface-offset: #1e293d;
  --color-surface-offset-2: #243045;
  --color-surface-dynamic: #2d3d58;
  --color-divider: #253348;
  --color-border: #2e3f58;
  --color-text: #d8deea;
  --color-text-muted: #7a869e;
  --color-text-faint: #4a5568;
  --color-text-inverse: #0f1520;
  --color-primary: #5b8cc4;
  --color-primary-hover: #7aa3d4;
  --color-primary-active: #96bade;
  --color-primary-highlight: #1e3050;
  --color-accent: #d4a047;
  --color-accent-hover: #e0b565;
  --color-accent-active: #eacc84;
  --color-accent-highlight: #3d2e10;
  --color-secondary: #6b8ec4;
  --color-secondary-hover: #84a3d4;
  --color-secondary-active: #9ebae4;
  --color-secondary-highlight: #1e2f4a;
  --color-success: #4aab72;
  --color-success-highlight: #1a3328;
  --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: #0f1520;
    --color-surface: #141c2d;
    --color-surface-2: #192235;
    --color-surface-offset: #1e293d;
    --color-surface-offset-2: #243045;
    --color-surface-dynamic: #2d3d58;
    --color-divider: #253348;
    --color-border: #2e3f58;
    --color-text: #d8deea;
    --color-text-muted: #7a869e;
    --color-text-faint: #4a5568;
    --color-text-inverse: #0f1520;
    --color-primary: #5b8cc4;
    --color-primary-hover: #7aa3d4;
    --color-primary-active: #96bade;
    --color-primary-highlight: #1e3050;
    --color-accent: #d4a047;
    --color-accent-hover: #e0b565;
    --color-accent-active: #eacc84;
    --color-accent-highlight: #3d2e10;
    --color-secondary: #6b8ec4;
    --color-secondary-hover: #84a3d4;
    --color-secondary-active: #9ebae4;
    --color-secondary-highlight: #1e2f4a;
    --color-success: #4aab72;
    --color-success-highlight: #1a3328;
  }
}

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

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

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: 1.2; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection { background: rgba(30,58,95,0.18); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); 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; }
table { border-collapse: collapse; width: 100%; }

a, button, [role='button'] {
  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; }