/* ==========================================================================
   gubins.lv - Industrial Neo-Brutalist Design System
   "A technical document from the future"
   ========================================================================== */

/* Layer order for proper cascade */
@layer reset, tokens, base, layout, components, utilities;

/* ==========================================================================
   RESET - Minimal, modern reset
   ========================================================================== */
@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
  }

  * {
    margin: 0;
    padding: 0;
  }

  html {
    -webkit-text-size-adjust: none;
    text-size-adjust: none;
  }

  body {
    min-height: 100vh;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
  }

  img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
  }

  input, button, textarea, select {
    font: inherit;
  }

  p, h1, h2, h3, h4, h5, h6 {
    overflow-wrap: break-word;
  }

  a {
    color: inherit;
    text-decoration-skip-ink: auto;
  }

  ul, ol {
    list-style: none;
  }
}

/* ==========================================================================
   TOKENS - Design variables
   ========================================================================== */
@layer tokens {
  :root {
    /* Typography */
    --font-body: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'IBM Plex Mono', 'SF Mono', 'Consolas', monospace;

    /* Type scale - BOLD */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 3rem;
    --text-5xl: 4rem;

    /* Spacing */
    --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;

    /* Layout */
    --content-width: 720px;
    --wide-width: 1080px;
    --nav-height: 48px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;

    /* Light mode (default) - HIGH CONTRAST */
    --bg: #fafafa;
    --bg-raised: #ffffff;
    --text: #000000;
    --text-muted: #404040;
    --accent: #ff3d00;
    --accent-hover: #dd2c00;
    --border: #d4d4d4;
    --border-strong: #000000;
    --code-bg: #f5f5f5;
    --grid-line: rgba(0, 0, 0, 0.03);
  }

  /* Dark mode - Material Dark */
  [data-theme="dark"] {
    --bg: #121212;
    --bg-raised: #1e1e1e;
    --text: #ffffff;
    --text-muted: #999999;
    --accent: #ff6e40;
    --accent-hover: #ff9e80;
    --border: #333333;
    --border-strong: #ffffff;
    --code-bg: #0a0a0a;
    --grid-line: rgba(255, 255, 255, 0.03);
  }

  /* System preference fallback */
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #121212;
      --bg-raised: #1e1e1e;
      --text: #ffffff;
      --text-muted: #999999;
      --accent: #ff6e40;
      --accent-hover: #ff9e80;
      --border: #333333;
      --border-strong: #ffffff;
      --code-bg: #0a0a0a;
      --grid-line: rgba(255, 255, 255, 0.03);
    }
  }
}

/* ==========================================================================
   BASE - Element defaults
   ========================================================================== */
@layer base {
  html {
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--text);
    background-color: var(--bg);
    transition: background-color var(--transition-normal), color var(--transition-normal);
  }

  body {
    font-size: var(--text-base);
    line-height: 1.65;
  }

  /* Headings - BOLD, technical */
  h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
  }

  h1 {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-6);
  }

  h2 {
    font-size: var(--text-2xl);
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
    font-family: var(--font-mono);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: var(--text-sm);
    color: var(--text-muted);
  }

  h3 {
    font-size: var(--text-xl);
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
    font-weight: 600;
  }

  h4 {
    font-size: var(--text-lg);
    margin-top: var(--space-6);
    margin-bottom: var(--space-2);
    font-weight: 600;
  }

  p {
    margin-bottom: var(--space-4);
  }

  /* Links - BOLD, obvious */
  a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-thickness: 2px;
    transition: all var(--transition-fast);
  }

  a:hover {
    color: var(--accent-hover);
    text-decoration-color: var(--accent-hover);
    background-color: color-mix(in srgb, var(--accent) 10%, transparent);
  }

  /* Strong and emphasis */
  strong, b {
    font-weight: 600;
  }

  em, i {
    font-style: italic;
  }

  /* Lists */
  ul, ol {
    margin-bottom: var(--space-4);
    padding-left: var(--space-6);
  }

  ul {
    list-style-type: disc;
  }

  ol {
    list-style-type: decimal;
  }

  li::marker {
    color: var(--text-muted);
  }

  /* Code - mono, technical */
  code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background-color: var(--code-bg);
    padding: 0.15em 0.35em;
    border-radius: 2px;
  }

  pre {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background-color: var(--code-bg);
    border: 1px solid var(--border);
    padding: var(--space-4);
    overflow-x: auto;
    margin-bottom: var(--space-4);
  }

  pre code {
    background: none;
    padding: 0;
    font-size: inherit;
  }

  /* Blockquotes - accent border */
  blockquote {
    border-left: 3px solid var(--accent);
    padding-left: var(--space-4);
    margin: var(--space-6) 0;
    color: var(--text-muted);
    font-style: italic;
  }

  /* Horizontal rules */
  hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: var(--space-8) 0;
  }

  /* Images */
  img {
    height: auto;
  }

  figure {
    margin: var(--space-6) 0;
  }

  figcaption {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--space-2);
  }

  /* Tables */
  table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-4);
    font-size: var(--text-sm);
  }

  th, td {
    border: 1px solid var(--border);
    padding: var(--space-2) var(--space-3);
    text-align: left;
  }

  th {
    font-weight: 600;
    background-color: var(--code-bg);
  }

  /* Selection */
  ::selection {
    background-color: var(--accent);
    color: white;
  }
}

/* ==========================================================================
   LAYOUT - Structure and containers
   ========================================================================== */
@layer layout {
  .container {
    width: min(var(--content-width), 100% - var(--space-8));
    margin-inline: auto;
  }

  .container-wide {
    width: min(var(--wide-width), 100% - var(--space-8));
    margin-inline: auto;
  }

  /* Skip link for accessibility */
  .skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: var(--bg);
    border: 1px solid var(--border-strong);
    z-index: 1000;
  }

  .skip-link:focus {
    top: var(--space-4);
  }

  /* Site header - INDUSTRIAL, thick borders */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg);
    border-top: 4px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    transition: background-color var(--transition-normal);
  }

  @supports (backdrop-filter: blur(8px)) {
    .site-header {
      background-color: color-mix(in srgb, var(--bg) 90%, transparent);
      backdrop-filter: blur(8px);
    }
  }

  .nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    gap: var(--space-4);
  }

  .nav-brand {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: var(--text-base);
    text-decoration: none;
    letter-spacing: 0.1em;
    color: var(--accent);
    padding: var(--space-1) var(--space-2);
    border: 1px solid var(--accent);
    position: relative;
  }

  .nav-brand::before {
    content: '>';
    margin-right: var(--space-2);
    opacity: 0.5;
  }

  .nav-brand:hover {
    text-decoration: none;
    background: var(--accent);
    color: var(--bg);
  }

  .nav-links {
    display: flex;
    gap: var(--space-6);
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .nav-links a {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-decoration: none;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-1) var(--space-2);
    border: 1px solid transparent;
    transition: all var(--transition-fast);
  }

  .nav-links a:hover {
    color: var(--text);
    border-color: var(--border-strong);
    background: none;
  }

  .nav-links a[aria-current="page"] {
    color: var(--accent);
    border-color: var(--accent);
  }

  .nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  /* Main content */
  main {
    padding-top: var(--space-12);
    min-height: calc(100vh - var(--nav-height) - 100px);
  }

  /* Footer */
  .site-footer {
    border-top: 1px solid var(--border);
    padding: var(--space-8) 0;
    font-size: var(--text-sm);
    color: var(--text-muted);
  }

  .site-footer a {
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    text-decoration: none;
  }

  .site-footer a:hover {
    color: var(--accent);
    background-color: color-mix(in srgb, var(--accent) 10%, transparent);
  }

  .footer-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
  }

  .footer-update {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    cursor: default;
  }

  .footer-update:hover {
    color: var(--accent);
    background-color: color-mix(in srgb, var(--accent) 10%, transparent);
  }

  .footer-thanks {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    cursor: default;
  }

  .footer-thanks:hover {
    color: var(--accent);
    background-color: color-mix(in srgb, var(--accent) 10%, transparent);
  }

  /* Grid layouts */
  .grid {
    display: grid;
    gap: var(--space-4);
  }

  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }

  /* Asymmetric homepage layout */
  .hero-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-2);
    align-items: center;
    margin-bottom: var(--space-8);
  }

  /* Medium screens - tighter nav spacing */
  @media (max-width: 800px) {
    .nav-links {
      gap: var(--space-3);
    }

    .nav-links a {
      padding: var(--space-1);
      letter-spacing: 0.02em;
    }
  }

  @media (max-width: 640px) {
    .hero-grid {
      grid-template-columns: 1fr;
      text-align: center;
    }

    .nav-links {
      display: none;
    }

    .grid-2, .grid-3 {
      grid-template-columns: 1fr;
    }

    .footer-thanks {
      flex-basis: 100%;
    }
  }
}

/* ==========================================================================
   COMPONENTS - Reusable UI elements
   ========================================================================== */
@layer components {
  /* Buttons - ghost style default */
  .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--border-strong);
    background: transparent;
    color: var(--text);
    cursor: pointer;
    transition: all var(--transition-fast);
  }

  .button:hover {
    background: var(--text);
    color: var(--bg);
    text-decoration: none;
  }

  .button-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
  }

  .button-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: white;
  }

  /* Icon button */
  .icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
  }

  .icon-button:hover {
    color: var(--text);
  }

  .icon-button svg {
    width: 20px;
    height: 20px;
  }

  /* Cards - bordered, no shadow */
  .card {
    border: 1px solid var(--border);
    padding: var(--space-4);
    background: var(--bg-raised);
    transition: border-color var(--transition-fast);
  }

  .card:hover {
    border-color: var(--border-strong);
  }

  .card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
  }

  .card-meta {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-2);
  }

  .card-description {
    color: var(--text-muted);
    font-size: var(--text-sm);
  }

  /* Tags - small, mono, uppercase */
  .tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-1) var(--space-2);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text-muted);
    transition: all var(--transition-fast);
  }

  .tag:hover {
    border-color: var(--accent);
    color: var(--accent);
    text-decoration: none;
  }

  .tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  /* Profile image */
  .profile-image {
    width: 160px;
    height: 160px;
    object-fit: cover;
  }

  /* Social links */
  .social-links {
    display: flex;
    gap: var(--space-4);
    list-style: none;
    padding: 0;
    margin: var(--space-4) 0 0 0;
  }

  .social-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
  }

  .social-links a:hover {
    color: var(--accent);
  }

  .social-links i {
    font-size: 1.5rem;
  }

  /* Section headers - TECHSPEC */
  .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--border);
  }

  .section-title {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin: 0;
  }

  .section-title::before {
    content: '//';
    margin-right: var(--space-2);
    color: var(--accent);
  }

  /* Year group headers */
  .year-header {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--border);
  }

  .year-header:first-child {
    margin-top: 0;
  }

  /* Post list - TECHSPEC with index numbers */
  .post-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: post-counter;
  }

  .post-item {
    padding: var(--space-4) 0;
    padding-left: var(--space-10);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space-4);
    position: relative;
    counter-increment: post-counter;
  }

  .post-item::before {
    content: counter(post-counter, decimal-leading-zero);
    position: absolute;
    left: 0;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--text-muted);
    opacity: 0.5;
  }

  .post-item:last-child {
    border-bottom: none;
  }

  .post-item a {
    text-decoration: none;
    font-weight: 600;
    color: var(--text);
    padding: var(--space-1) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
  }

  .post-item a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background: none;
  }

  .post-date {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--text-muted);
    white-space: nowrap;
    letter-spacing: 0.05em;
  }

  .post-date::before {
    content: '[';
    color: var(--accent);
  }

  .post-date::after {
    content: ']';
    color: var(--accent);
  }

  /* Reading time */
  .reading-time {
    font-size: var(--text-sm);
    color: var(--text-muted);
  }

  /* Theme toggle */
  .theme-toggle {
    position: relative;
    cursor: pointer;
  }

  .theme-toggle .sun-icon,
  .theme-toggle .moon-icon {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    pointer-events: none;
  }

  .theme-toggle .moon-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: rotate(-90deg);
  }

  [data-theme="dark"] .theme-toggle .sun-icon {
    opacity: 0;
    transform: rotate(90deg);
  }

  [data-theme="dark"] .theme-toggle .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
  }

  /* Photography grid - masonry with CSS columns */
  .photo-grid {
    columns: 3 280px;
    gap: var(--space-4);
  }

  .photo-item {
    break-inside: avoid;
    margin-bottom: var(--space-4);
  }

  .photo-item img {
    width: 100%;
    height: auto;
    border: 1px solid var(--border);
    transition: border-color var(--transition-fast);
  }

  .photo-item:hover img {
    border-color: var(--border-strong);
  }
}

/* ==========================================================================
   UTILITIES - Helper classes
   ========================================================================== */
@layer utilities {
  .text-muted { color: var(--text-muted); }
  .text-accent { color: var(--accent); }
  .text-sm { font-size: var(--text-sm); }
  .text-lg { font-size: var(--text-lg); }
  .text-center { text-align: center; }
  .text-mono { font-family: var(--font-mono); }

  .mt-4 { margin-top: var(--space-4); }
  .mt-8 { margin-top: var(--space-8); }
  .mb-4 { margin-bottom: var(--space-4); }
  .mb-8 { margin-bottom: var(--space-8); }

  .hidden { display: none; }
  .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;
  }

  /* Fade in animation */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .animate-fade-in {
    animation: fadeIn 0.4s ease forwards;
  }

  .animate-delay-1 { animation-delay: 0.1s; opacity: 0; }
  .animate-delay-2 { animation-delay: 0.2s; opacity: 0; }
  .animate-delay-3 { animation-delay: 0.3s; opacity: 0; }
  .animate-delay-4 { animation-delay: 0.4s; opacity: 0; }
}