@layer reset, base, theme, components, utilities;

@layer reset {
  /* Box sizing rules */
  html {
    box-sizing: border-box;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
  }

  *, *::before, *::after {
    box-sizing: inherit;
  }

  /* Reset default margins and padding */
  body {
    margin: 0;
    padding: 0;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  /* Media defaults */
  img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
  }

  /* Form and interactive elements reset */
  input, button, textarea, select {
    font: inherit;
    color: inherit;
  }

  button {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
  }

  ul, ol {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  a {
    color: inherit;
    text-decoration: none;
  }
}

@layer theme {
  :root {
    color-scheme: light dark;

    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 18px;

    /* Light Theme Palette Tokens */
    --color-bg-light: oklch(98% 0.005 240);
    --color-card-light: oklch(100% 0 0);
    --color-text-light: oklch(25% 0.02 240);
    --color-text-muted-light: oklch(48% 0.02 240);
    --color-heading-light: oklch(15% 0.02 240);
    --color-accent-light: oklch(48% 0.16 260); /* Deep Indigo */
    --color-accent-hover-light: oklch(40% 0.16 260);
    --color-border-light: oklch(92% 0.01 240);
    --color-glass-light: rgba(255, 255, 255, 0.7);
    --color-glass-border-light: rgba(255, 255, 255, 0.5);
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03), 0 0 0 1px rgba(0, 0, 0, 0.02);

    /* Dark Theme Palette Tokens */
    --color-bg-dark: oklch(14% 0.015 250); /* Deep midnight slate */
    --color-card-dark: oklch(19% 0.018 250); /* Subtle card slate */
    --color-text-dark: oklch(85% 0.01 250);
    --color-text-muted-dark: oklch(65% 0.015 250);
    --color-heading-dark: oklch(96% 0.01 250);
    --color-accent-dark: oklch(75% 0.12 210); /* Bright Teal-Blue */
    --color-accent-hover-dark: oklch(82% 0.12 210);
    --color-border-dark: oklch(26% 0.02 250);
    --color-glass-dark: rgba(18, 20, 29, 0.75);
    --color-glass-border-dark: rgba(255, 255, 255, 0.06);
    --shadow-dark: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(255, 255, 255, 0.02);

    /* Scrollbars */
    --color-scrollbar-track: light-dark(rgba(0,0,0,0.03), rgba(255,255,255,0.03));
    --color-scrollbar-thumb: light-dark(rgba(0,0,0,0.15), rgba(255,255,255,0.15));
    scrollbar-color: var(--color-scrollbar-thumb) var(--color-scrollbar-track);
    scrollbar-width: thin;
  }

  /* Bind variables using light-dark() where supported */
  @supports (color: light-dark(white, black)) {
    :root {
      --color-bg: light-dark(var(--color-bg-light), var(--color-bg-dark));
      --color-card: light-dark(var(--color-card-light), var(--color-card-dark));
      --color-text: light-dark(var(--color-text-light), var(--color-text-dark));
      --color-text-muted: light-dark(var(--color-text-muted-light), var(--color-text-muted-dark));
      --color-heading: light-dark(var(--color-heading-light), var(--color-heading-dark));
      --color-accent: light-dark(var(--color-accent-light), var(--color-accent-dark));
      --color-accent-hover: light-dark(var(--color-accent-hover-light), var(--color-accent-hover-dark));
      --color-border: light-dark(var(--color-border-light), var(--color-border-dark));
      --color-glass: light-dark(var(--color-glass-light), var(--color-glass-dark));
      --color-glass-border: light-dark(var(--color-glass-border-light), var(--color-glass-border-dark));
      --shadow: light-dark(var(--shadow-light), var(--shadow-dark));
    }

    html[data-theme="light"] {
      color-scheme: light;
    }

    html[data-theme="dark"] {
      color-scheme: dark;
    }
  }

  /* Fallback definitions for older browsers */
  @supports not (color: light-dark(white, black)) {
    :root {
      --color-bg: var(--color-bg-light);
      --color-card: var(--color-card-light);
      --color-text: var(--color-text-light);
      --color-text-muted: var(--color-text-muted-light);
      --color-heading: var(--color-heading-light);
      --color-accent: var(--color-accent-light);
      --color-accent-hover: var(--color-accent-hover-light);
      --color-border: var(--color-border-light);
      --color-glass: var(--color-glass-light);
      --color-glass-border: var(--color-glass-border-light);
      --shadow: var(--shadow-light);
    }

    @media (prefers-color-scheme: dark) {
      :root:not([data-theme="light"]) {
        --color-bg: var(--color-bg-dark);
        --color-card: var(--color-card-dark);
        --color-text: var(--color-text-dark);
        --color-text-muted: var(--color-text-muted-dark);
        --color-heading: var(--color-heading-dark);
        --color-accent: var(--color-accent-dark);
        --color-accent-hover: var(--color-accent-hover-dark);
        --color-border: var(--color-border-dark);
        --color-glass: var(--color-glass-dark);
        --color-glass-border: var(--color-glass-border-dark);
        --shadow: var(--shadow-dark);
      }
    }

    html[data-theme="dark"] {
      --color-bg: var(--color-bg-dark);
      --color-card: var(--color-card-dark);
      --color-text: var(--color-text-dark);
      --color-text-muted: var(--color-text-muted-dark);
      --color-heading: var(--color-heading-dark);
      --color-accent: var(--color-accent-dark);
      --color-accent-hover: var(--color-accent-hover-dark);
      --color-border: var(--color-border-dark);
      --color-glass: var(--color-glass-dark);
      --color-glass-border: var(--color-glass-border-dark);
      --shadow: var(--shadow-dark);
    }
  }
}

@layer base {
  body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    font-size: 1rem;
    background-color: var(--color-bg);
    color: var(--color-text);
    transition: background-color 0.3s ease, color 0.3s ease;
  }

  h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', system-ui, -apple-system, sans-serif;
    color: var(--color-heading);
    font-weight: 700;
    margin-top: 0;
    margin-bottom: var(--space-sm);
    line-height: 1.25;
    text-wrap: balance;
    transition: color 0.3s ease;
  }

  h1 { font-size: clamp(2rem, 1.6rem + 2vw, 3rem); font-weight: 800; }
  h2 { font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem); margin-top: var(--space-xl); border-bottom: 2px solid var(--color-border); padding-bottom: var(--space-xs); }
  h3 { font-size: 1.25rem; font-weight: 600; margin-top: var(--space-md); }

  p {
    margin-top: 0;
    margin-bottom: var(--space-md);
    text-wrap: pretty;
  }

  a {
    color: var(--color-accent);
    text-decoration: none;
    background-image: linear-gradient(var(--color-accent), var(--color-accent));
    background-size: 0% 1px;
    background-repeat: no-repeat;
    background-position: left bottom;
    transition: background-size 0.25s ease, color 0.25s ease;
  }

  a:hover {
    color: var(--color-accent-hover);
    background-size: 100% 1px;
  }

  /* Accessibility focus indicators */
  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
  }

  /* Content wrap */
  .content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-xxl) var(--space-md);
  }
}

@layer components {
  /* --- Sticky Header --- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-glass-border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
  }

  .header-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .brand {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-heading);
    background-image: none;
    letter-spacing: -0.5px;
  }

  .site-nav {
    margin-left: auto;
    margin-right: var(--space-lg);
  }

  .nav-links {
    display: flex;
    gap: var(--space-lg);
  }

  .nav-links a {
    font-weight: 500;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    background-image: none;
    padding: var(--space-xs) 0;
    position: relative;
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.25s ease;
  }

  .nav-links a:hover::after,
  .nav-links a.active::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .nav-links a:hover,
  .nav-links a.active {
    color: var(--color-heading);
  }

  /* --- Theme Toggle Button --- */
  .theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    background-color: var(--color-card);
    transition: background-color 0.2s ease, border-color 0.2s, color 0.2s;
  }

  .theme-toggle-btn:hover {
    background-color: var(--color-bg);
    border-color: var(--color-accent);
    color: var(--color-accent);
  }

  .sun-icon { display: none; }
  .moon-icon { display: block; }

  html[data-theme="dark"] .sun-icon { display: block; }
  html[data-theme="dark"] .moon-icon { display: none; }

  /* --- Hero Landing Section --- */
  .hero-section {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-xl) 0 var(--space-xxl) 0;
  }

  .avatar-container {
    position: relative;
    margin-bottom: var(--space-md);
  }

  .avatar {
    width: 96px;
    height: 96px;
    border-radius: var(--radius-xl);
    border: 3px solid var(--color-card);
    box-shadow: var(--shadow);
  }

  .hero-tagline {
    font-size: clamp(1.15rem, 1.15rem + 0.5vw, 1.5rem);
    color: var(--color-text-muted);
    font-weight: 400;
    max-width: 600px;
    line-height: 1.5;
  }

  .hero-buttons {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
    flex-wrap: wrap;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
    background-image: none; /* remove link underline */
  }

  .btn:active {
    transform: scale(0.98);
  }

  .btn-primary {
    background-color: var(--color-accent);
    color: var(--color-bg);
    box-shadow: 0 4px 12px oklch(from var(--color-accent) l c h / 0.15);
  }

  .btn-primary:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-bg);
    box-shadow: 0 6px 16px oklch(from var(--color-accent) l c h / 0.25);
  }

  .btn-secondary {
    background-color: var(--color-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow);
  }

  .btn-secondary:hover {
    background-color: var(--color-bg);
    border-color: var(--color-accent);
    color: var(--color-accent);
  }

  /* --- Projects grid --- */
  .projects-section {
    margin-top: var(--space-xxl);
  }

  .projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
  }

  @media (min-width: 600px) {
    .projects-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  .project-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, box-shadow 0.25s ease;
  }

  .project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.15);
  }

  .project-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
  }

  .project-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    flex-grow: 1;
    margin-bottom: var(--space-md);
  }

  .project-links {
    display: flex;
    gap: var(--space-md);
    font-size: 0.85rem;
    font-weight: 600;
  }

  /* --- Social links --- */
  .social-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-top: var(--space-lg);
  }

  .social-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: border-color 0.2s ease, transform 0.2s ease;
    background-image: none;
    color: var(--color-text);
  }

  .social-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    color: var(--color-accent);
  }

  .social-card svg {
    flex-shrink: 0;
  }

  /* --- Resume Styles --- */
  .resume-header {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-xxl);
  }

  @media (min-width: 650px) {
    .resume-header {
      grid-template-columns: 2fr 1fr;
      align-items: start;
    }
  }

  .resume-contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    font-size: 0.9rem;
    color: var(--color-text-muted);
  }

  @media (min-width: 650px) {
    .resume-contact {
      text-align: right;
      align-items: flex-end;
    }
  }

  .resume-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  @media (min-width: 700px) {
    .resume-layout {
      grid-template-columns: 2.2fr 1fr;
      gap: var(--space-xxl);
    }
  }

  .resume-section-title {
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-accent);
    border: none;
    padding-bottom: 0;
    margin-top: 0;
    margin-bottom: var(--space-lg);
  }

  .timeline {
    position: relative;
    border-left: 2px solid var(--color-border);
    padding-left: var(--space-lg);
    margin-left: 8px;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
  }

  .timeline-item {
    position: relative;
  }

  .timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-lg) - 7px);
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-bg);
    border: 2px solid var(--color-accent);
    transition: background-color 0.3s ease;
  }

  .timeline-header {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--space-xs);
  }

  @media (min-width: 500px) {
    .timeline-header {
      flex-direction: row;
      justify-content: space-between;
      align-items: baseline;
    }
  }

  .timeline-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
  }

  .timeline-company {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
  }

  .timeline-company a {
    color: inherit;
    background-image: none;
    border-bottom: 1px dashed var(--color-text-muted);
  }
  .timeline-company a:hover {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
  }

  .timeline-date {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    font-family: 'Outfit', sans-serif;
  }

  .timeline-subtitle {
    font-size: 0.95rem;
    font-style: italic;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
  }

  .timeline-content {
    font-size: 0.92rem;
  }

  .timeline-content ul {
    list-style-type: square;
    padding-left: var(--space-md);
  }

  .timeline-content li {
    margin-bottom: var(--space-xs);
  }

  .skills-block {
    margin-bottom: var(--space-xl);
  }

  .skills-category {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
  }

  .skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
  }

  .skill-badge {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 500;
    box-shadow: var(--shadow);
  }

  .tech-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: var(--space-md);
  }

  .tech-pill {
    background-color: oklch(from var(--color-accent) calc(l + 0.3) c h / 0.1);
    color: var(--color-accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
  }

  html[data-theme="dark"] .tech-pill {
    background-color: oklch(from var(--color-accent) calc(l - 0.5) c h / 0.2);
  }

  /* Footer meta back button */
  .back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
    background-image: none;
  }
}

@layer utilities {
  .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;
  }
}

/* --- PRINT STYLES --- */
@media print {
  @page {
    size: letter;
    margin: 0.6in 0.5in 0.6in 0.5in;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 9.5pt !important;
    line-height: 1.4 !important;
  }

  /* Hide Web-only items */
  .site-header, 
  .theme-toggle-btn, 
  .site-footer, 
  .back-link,
  .btn,
  .print-hide {
    display: none !important;
  }

  .content-wrapper {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  h1, h2, h3, h4, h5, h6 {
    color: #000000 !important;
    page-break-after: avoid;
  }

  h1 {
    font-size: 24pt !important;
    margin-bottom: 2pt !important;
  }

  h2 {
    font-size: 13pt !important;
    margin-top: 14pt !important;
    margin-bottom: 6pt !important;
    border-bottom: 1.5px solid #000000 !important;
    padding-bottom: 2pt !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  h3 {
    font-size: 11pt !important;
    margin-top: 8pt !important;
    margin-bottom: 4pt !important;
  }

  /* Overwrite grid styles to linear layout for paper */
  .resume-header {
    display: block !important;
    border-bottom: 2px solid #000000;
    padding-bottom: 8pt;
    margin-bottom: 12pt !important;
  }

  .resume-contact {
    display: block !important;
    text-align: left !important;
    margin-top: 4pt;
    font-size: 8.5pt !important;
    color: #333333 !important;
  }

  .resume-contact span {
    display: inline-block;
  }
  .resume-contact span:not(:last-child)::after {
    content: "  |  ";
    font-weight: bold;
    color: #666;
  }

  .resume-layout {
    display: block !important;
  }

  .resume-section-title {
    display: none !important; /* Hide repeated uppercase header text */
  }

  /* Linearized columns for prints */
  .timeline {
    border-left: none !important;
    padding-left: 0 !important;
    margin-left: 0 !important;
    gap: 10pt !important;
  }

  .timeline-item {
    page-break-inside: avoid;
  }

  .timeline-item::before {
    display: none !important;
  }

  .timeline-header {
    display: flex !important;
    flex-direction: row !important;
    justify-content: space-between !important;
    align-items: baseline !important;
  }

  .timeline-title {
    font-size: 10.5pt !important;
    font-weight: bold !important;
  }

  .timeline-company {
    font-size: 10.5pt !important;
  }

  .timeline-company a {
    border-bottom: none !important;
  }

  .timeline-date {
    font-size: 9pt !important;
    font-weight: bold !important;
    color: #333333 !important;
  }

  .timeline-subtitle {
    font-size: 9.5pt !important;
    margin-bottom: 3pt !important;
    color: #444444 !important;
  }

  .timeline-content {
    font-size: 9pt !important;
  }

  .timeline-content ul {
    padding-left: 14pt !important;
    list-style-type: disc !important;
  }

  .timeline-content li {
    margin-bottom: 2pt !important;
  }

  /* Skills display for print */
  .skills-block {
    margin-bottom: 10pt !important;
    page-break-inside: avoid;
  }

  .skills-category {
    font-size: 8.5pt !important;
    font-weight: bold !important;
    margin-bottom: 2pt !important;
  }

  .skills-list {
    display: block !important;
  }

  .skill-badge {
    display: inline-block !important;
    background: none !important;
    border: none !important;
    padding: 0 !important;
    margin-right: 6pt !important;
    font-size: 9pt !important;
    box-shadow: none !important;
    color: #000000 !important;
  }
  .skill-badge:not(:last-child)::after {
    content: ",";
  }

  .tech-pills {
    display: none !important; /* Hide color badges in print */
  }

  /* Link handling for print */
  a {
    color: #000000 !important;
    background: none !important;
  }
  a[href^="http"]:after {
    content: " (" attr(href) ")";
    font-size: 8pt !important;
    color: #444444 !important;
    font-weight: normal !important;
  }
}