/* plk-base.css — Pipelark design tokens + resets */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Brand palette */
  --plk-brand-primary:         #0B1E2D;
  --plk-accent-decorative:     #22C55E;
  --plk-accent-aa-on-light:    #166534;
  --plk-accent-aa-on-dark:     #22C55E;

  /* Foreground tokens */
  --plk-fg-light-primary:      #0B1E2D;
  --plk-fg-light-secondary:    #4B5563;
  --plk-fg-dark-primary:       #F0F6FF;
  --plk-fg-dark-secondary:     #94A3B8;
  --plk-fg-dark-muted:         #64748B;

  /* Background tokens */
  --plk-bg-light:              #F8FAFC;
  --plk-bg-white:              #FFFFFF;
  --plk-bg-cream:              #F1F5F9;
  --plk-bg-dark:               #0B1E2D;
  --plk-bg-dark-alt:           #112233;
  --plk-bg-dark-mid:           #0F2539;

  /* Border tokens */
  --plk-border-light:          #E2E8F0;
  --plk-border-dark:           rgba(255,255,255,0.10);

  /* Typography */
  --plk-font-body:             'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --plk-font-mono:             'JetBrains Mono', 'Fira Code', Consolas, 'Courier New', monospace;

  /* Type scale */
  --plk-h1:                    clamp(2.5rem, 5vw, 4rem);
  --plk-h2:                    clamp(1.8rem, 3vw, 2.5rem);
  --plk-h3:                    clamp(1.2rem, 2vw, 1.5rem);
  --plk-body:                  1rem;
  --plk-small:                 0.875rem;

  /* Spacing */
  --plk-section-py:            clamp(4rem, 8vw, 7rem);
  --plk-container-max:         1200px;
  --plk-container-px:          clamp(1.25rem, 4vw, 3rem);

  /* Radius */
  --plk-radius-sm:             6px;
  --plk-radius-md:             10px;
  --plk-radius-lg:             16px;
  --plk-radius-xl:             24px;

  /* Shadows */
  --plk-shadow-sm:             0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --plk-shadow-md:             0 4px 16px rgba(0,0,0,0.12);
  --plk-shadow-lg:             0 16px 48px rgba(0,0,0,0.18);
  --plk-shadow-green:          0 0 24px rgba(34,197,94,0.25);

  /* Transitions */
  --plk-transition:            0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--plk-font-body);
  font-size: var(--plk-body);
  line-height: 1.7;
  color: var(--plk-fg-light-primary);
  background: var(--plk-bg-white);
}

body.plk-page--dark-top {
  background: var(--plk-bg-dark);
}

body.plk-page--light-top {
  background: var(--plk-bg-white);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; }

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: var(--plk-h1); }
h2 { font-size: var(--plk-h2); }
h3 { font-size: var(--plk-h3); }

p + p { margin-top: 1em; }

address { font-style: normal; }

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--plk-accent-decorative);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Selection */
::selection {
  background: rgba(34,197,94,0.25);
  color: var(--plk-fg-light-primary);
}

/* Utility: screen reader only */
.plk-sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Container */
.plk-container {
  max-width: var(--plk-container-max);
  margin: 0 auto;
  padding-left: var(--plk-container-px);
  padding-right: var(--plk-container-px);
}

/* Eyebrow */
.plk-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Section bg variants */
.plk-section--dark     { background: var(--plk-bg-dark); }
.plk-section--dark-alt { background: var(--plk-bg-dark-alt); }
.plk-section--dark-mid { background: var(--plk-bg-dark-mid); }
.plk-section--light    { background: var(--plk-bg-light); }
.plk-section--white    { background: var(--plk-bg-white); }
.plk-section--cream    { background: var(--plk-bg-cream); }

/* Section padding */
.plk-section {
  padding-top: var(--plk-section-py);
  padding-bottom: var(--plk-section-py);
}

/* Text utility */
.plk-text-center { text-align: center; }
.plk-text-left   { text-align: left; }

/* Grid utility */
.plk-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.plk-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

@media (max-width: 768px) {
  .plk-grid-2, .plk-grid-3 { grid-template-columns: 1fr; }
}

/* Divider */
.plk-divider {
  border: none;
  border-top: 1px solid var(--plk-border-light);
  margin: 0;
}

.plk-divider--dark {
  border-top-color: var(--plk-border-dark);
}

/* Fade-in animation */
.plk-fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.plk-fade-in.visible {
  opacity: 1;
  transform: none;
}

/* Failsafe: after 1.2s reveal all */
@keyframes plk-reveal {
  to { opacity: 1; transform: none; }
}