/* ==========================================================================
   SAHAYA BASE & EDITORIAL STYLES
   ========================================================================== */

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

html {
  font-size: 16px;
  background-color: var(--paper-base);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: auto;
  min-height: 100%;
}

body {
  min-height: 100%;
  background-color: var(--paper-base);
  background-image: 
    radial-gradient(rgba(28, 30, 28, 0.035) 1px, transparent 1px),
    linear-gradient(to right, rgba(221, 214, 200, 0.25) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(221, 214, 200, 0.25) 1px, transparent 1px);
  background-size: 24px 24px, 120px 120px, 120px 120px;
  background-position: 0 0, 0 0, 0 0;
  color: var(--ink-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
}
::-webkit-scrollbar-track {
  background: var(--paper-base);
  border-left: 1px solid var(--ink-divider);
}
::-webkit-scrollbar-thumb {
  background: var(--ink-tertiary);
  border-radius: 0;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--ink-secondary);
}

/* Text Selection */
::selection {
  background: var(--rust-soft);
  color: var(--rust-hover);
}

/* Typography Hierarchy */
h1, h2, h3, h4, .font-serif {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--ink-primary);
  line-height: 1.15;
  letter-spacing: -0.015em;
}

p {
  color: var(--ink-secondary);
  font-size: 1.0625rem;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-micro) var(--ease-editorial);
}

/* Architectural Underlines */
.editorial-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-primary);
  font-weight: 500;
}

.editorial-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--duration-normal) var(--ease-editorial);
}

.editorial-link:hover::after {
  transform: scaleX(1);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  background-color: var(--ink-primary);
  color: var(--paper-pure);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--ink-primary);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color var(--duration-normal) var(--ease-editorial),
              color var(--duration-normal) var(--ease-editorial),
              border-color var(--duration-normal) var(--ease-editorial),
              transform var(--duration-micro) var(--ease-editorial);
}

.btn-primary:hover {
  background-color: var(--rust-accent);
  border-color: var(--rust-accent);
  color: #FFFFFF;
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  background-color: transparent;
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--ink-divider);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  transition: border-color var(--duration-normal) var(--ease-editorial),
              background-color var(--duration-normal) var(--ease-editorial),
              color var(--duration-normal) var(--ease-editorial);
}

.btn-secondary:hover {
  border-color: var(--ink-primary);
  background-color: var(--paper-contrast);
}

/* Architectural Mono Tags & Badges */
.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.mono-tag .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--rust-accent);
  display: inline-block;
}

.mono-tag .dot.sage {
  background-color: var(--sage-accent);
}

/* Divider Lines */
.hairline-divider {
  width: 100%;
  height: 1px;
  background-color: var(--ink-divider);
  position: relative;
}

.hairline-divider.animated {
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform var(--duration-story) var(--ease-editorial);
}

.hairline-divider.animated.in-view {
  transform: scaleX(1);
}

/* Reading Progress Bar */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: transparent;
  z-index: 1000;
  pointer-events: none;
}

#reading-progress-bar {
  width: 0%;
  height: 100%;
  background: var(--rust-accent);
  transition: width 80ms linear;
}

/* Focus States */
:focus-visible {
  outline: 2px solid var(--rust-accent);
  outline-offset: 3px;
}

/* Accessibility Utility */
.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;
}