/* base.css — Forte Medical Billing Solutions */
/* Design tokens + reset */

:root {
  /* Type Scale (fluid 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,     0.95rem + 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);

  /* 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;

  /* 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);

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

  /* Fonts */
  --font-body: 'Plus Jakarta Sans', 'Inter', sans-serif;
  --font-display: 'DM Serif Display', 'Georgia', serif;
}

/* === LIGHT MODE (default) === */
:root, [data-theme="light"] {
  --color-bg:             #f8f9fc;
  --color-surface:        #ffffff;
  --color-surface-2:      #f1f4f9;
  --color-surface-offset: #e8ecf4;
  --color-divider:        #d5dbe6;
  --color-border:         #c8d0de;

  /* Text */
  --color-text:           #1a1d2e;
  --color-text-muted:     #5c6478;
  --color-text-faint:     #9aa2b4;
  --color-text-inverse:   #ffffff;

  /* Primary — Deep Navy */
  --color-primary:        #0A2463;
  --color-primary-hover:  #081d50;
  --color-primary-active: #06163d;
  --color-primary-light:  #1a3a7a;

  /* Accent — Bright Blue */
  --color-accent:         #1E88E5;
  --color-accent-hover:   #1976D2;
  --color-accent-active:  #1565C0;
  --color-accent-light:   #e3f0fc;

  /* Success */
  --color-success:        #16a34a;
  --color-success-light:  #dcfce7;

  /* Warning */
  --color-warning:        #d97706;
  --color-warning-light:  #fef3c7;

  /* Error */
  --color-error:          #dc2626;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(10, 36, 99, 0.06);
  --shadow-md: 0 4px 16px rgba(10, 36, 99, 0.08);
  --shadow-lg: 0 12px 40px rgba(10, 36, 99, 0.12);
  --shadow-xl: 0 20px 60px rgba(10, 36, 99, 0.16);
}

/* === DARK MODE === */
[data-theme="dark"] {
  --color-bg:             #0d1117;
  --color-surface:        #161b22;
  --color-surface-2:      #1c2330;
  --color-surface-offset: #21283a;
  --color-divider:        #2a3347;
  --color-border:         #354058;

  --color-text:           #e1e4ea;
  --color-text-muted:     #8b95a8;
  --color-text-faint:     #4f5b6e;
  --color-text-inverse:   #0d1117;

  --color-primary:        #4a7adb;
  --color-primary-hover:  #5d8ce3;
  --color-primary-active: #3a6ac8;
  --color-primary-light:  #1a2a4a;

  --color-accent:         #5ba3ed;
  --color-accent-hover:   #72b3f2;
  --color-accent-active:  #4290e0;
  --color-accent-light:   #1a2d45;

  --color-success:        #4ade80;
  --color-success-light:  #0a2618;

  --color-warning:        #fbbf24;
  --color-warning-light:  #2a2009;

  --color-error:          #f87171;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0d1117;
    --color-surface:        #161b22;
    --color-surface-2:      #1c2330;
    --color-surface-offset: #21283a;
    --color-divider:        #2a3347;
    --color-border:         #354058;
    --color-text:           #e1e4ea;
    --color-text-muted:     #8b95a8;
    --color-text-faint:     #4f5b6e;
    --color-text-inverse:   #0d1117;
    --color-primary:        #4a7adb;
    --color-primary-hover:  #5d8ce3;
    --color-primary-active: #3a6ac8;
    --color-primary-light:  #1a2a4a;
    --color-accent:         #5ba3ed;
    --color-accent-hover:   #72b3f2;
    --color-accent-active:  #4290e0;
    --color-accent-light:   #1a2d45;
    --color-success:        #4ade80;
    --color-success-light:  #0a2618;
    --color-warning:        #fbbf24;
    --color-warning-light:  #2a2009;
    --color-error:          #f87171;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
  }
}

/* === 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: 100px;
}

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;
  font-family: var(--font-display);
}

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

::selection {
  background: rgba(30, 136, 229, 0.2);
  color: var(--color-text);
}

: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; }
table { border-collapse: collapse; width: 100%; }

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);
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

.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;
}