/* ═══════════════════════════════════════════════════
   SearchPhoneNumber.com — Base Stylesheet
   Direction C: Modern Intelligence
   ═══════════════════════════════════════════════════ */

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

:root {
  /* ─── Type Scale (fluid) ─── */
  --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-hero: clamp(2.5rem,   1rem    + 5vw,    4.5rem);

  /* ─── Spacing (4px base) ─── */
  --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;

  /* ─── Colors: Modern Intelligence ─── */
  --color-bg:         #FAFAFA;
  --color-surface:    #FFFFFF;
  --color-border:     #E5E5E5;
  --color-border-hover: #2563EB;
  --color-text:       #2D2D2D;
  --color-text-muted: #888888;
  --color-text-faint: #AAAAAA;
  --color-accent:     #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-gradient:   linear-gradient(135deg, #2563EB, #4F46E5);
  --color-glow:       rgba(37, 99, 235, 0.06);
  --color-glow-strong: rgba(37, 99, 235, 0.15);

  /* Hero (dark) */
  --hero-bg:          #0D0D0F;
  --hero-text:        #FFFFFF;
  --hero-muted:       #888888;

  /* Semantic */
  --color-success:    #22C55E;
  --color-warning:    #F59E0B;
  --color-error:      #EF4444;

  /* ─── Radius ─── */
  --radius-sm:   6px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;

  /* ─── Shadows ─── */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg:  0 12px 32px rgba(0,0,0,0.12);

  /* ─── Transitions ─── */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 180ms var(--ease);

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

  /* ─── Font ─── */
  --font-body: 'General Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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; }
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; }
button { cursor: pointer; background: none; border: none; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

::selection {
  background: rgba(37, 99, 235, 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;
  }
}

/* ─── Utility Classes ─── */
.container { width: 100%; max-width: var(--content-wide); margin: 0 auto; padding: 0 var(--space-6); }
.container-narrow { width: 100%; max-width: var(--content-default); margin: 0 auto; padding: 0 var(--space-6); }
.section-label {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.section-padding { padding-block: clamp(var(--space-12), 8vw, var(--space-24)); }

.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;
}