/* ==========================================================================
   ADENGER — Core Stylesheet (main.css)
   Exclusively powered by local authentic Helvetica typography suite.
   ========================================================================== */

@import url('variables.css');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-charcoal);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  background-color: var(--color-charcoal);
  color: var(--color-text-primary);
  overflow-x: hidden;
  max-width: 100%;
  position: relative;
  min-height: 100vh;
}

/* Custom Selection */
::selection {
  background-color: var(--color-lime);
  color: var(--color-void);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-charcoal-deep);
}
::-webkit-scrollbar-thumb {
  background: #383838;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-lime);
}

/* --------------------------------------------------------------------------
   Tactile Grain Texture Overlay
   -------------------------------------------------------------------------- */
.grain-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  background-image: url('../textures/adenger-grain.jpg');
  background-repeat: repeat;
  background-size: var(--grain-size);
  mix-blend-mode: var(--grain-blend-mode);
  opacity: var(--grain-opacity);
  pointer-events: none;
  z-index: var(--z-grain);
}

/* --------------------------------------------------------------------------
   Typography Hierarchy — Swiss Modernist Restraint
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text-hero);
  letter-spacing: -0.02em;
}

p {
  color: var(--color-text-secondary);
  font-weight: 400;
  letter-spacing: -0.01em;
}

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

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}

/* --------------------------------------------------------------------------
   Layout Containers & Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-gutter);
  padding-right: var(--container-gutter);
}

.section {
  position: relative;
  padding-top: var(--section-spacing-y);
  padding-bottom: var(--section-spacing-y);
  z-index: var(--z-base);
}

.section--no-top {
  padding-top: 0;
}

.section--darker {
  background-color: var(--color-charcoal-deep);
}

/* Section Header Component */
.section-header {
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
}

.section-header__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.meta-tag {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-lime);
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.meta-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-lime);
  border-radius: 50%;
}

.hero__meta .meta-tag::before {
  display: none !important;
}

.meta-index {
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
}

.section-header__title {
  font-size: var(--text-display-md);
  max-width: 22ch;
}

.section-header__description {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  max-width: 48ch;
  margin-top: 1.25rem;
  line-height: 1.7;
}

/* Studio Pill Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-meta);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-charcoal-border);
  color: var(--color-text-secondary);
}

.badge--lime {
  background: var(--color-lime-dim);
  border-color: var(--color-lime-border);
  color: var(--color-lime);
}

.badge--placeholder {
  border-style: dashed;
  border-color: rgba(148, 190, 61, 0.4);
  color: var(--color-lime);
}

/* Accessibility Focus Ring */
:focus-visible {
  outline: 2px solid var(--color-lime);
  outline-offset: 4px;
}