/* css/style.css */

/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
  /* Colors - Light, simple, high-contrast */
  --bg: #f8fafc;
  --bg-raised: #ffffff;
  --bg-hover: #f1f5f9;
  --text: #0f172a;
  --text-light: #475569;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-glow: rgba(37, 99, 235, 0.12);
  --border: #e2e8f0;

  /* Typography */
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --font-size-h1: clamp(2rem, 1.5rem + 2vw, 3rem);
  --font-size-h2: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  --font-size-h3: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --font-size-small: 0.875rem;
  --line-height: 1.6;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;

  /* Layout */
  --max-width-prose: 700px;
  --max-width-wide: 1000px;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--text);
  background-color: var(--bg);
  min-height: 100vh;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--accent-dark);
  color: var(--bg);
  padding: var(--space-xs) var(--space-sm);
  z-index: 100;
  border-radius: 0 0 4px;
}

.skip-link:focus {
  top: 0;
}

/* ============================================
   Typography
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.3;
  font-weight: 600;
  color: var(--text);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

a:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

a:visited {
  color: var(--accent-dark);
}

/* ============================================
   Layout
   ============================================ */
.container {
  width: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

.container--narrow {
  max-width: var(--max-width-prose);
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

@media (min-width: 480px) {
  .site-header .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.site-title {
  font-size: clamp(1.75rem, 1.5rem + 1.5vw, 2.5rem);
  font-weight: 700;
}

.site-title a {
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
}

.site-title a:hover {
  text-decoration: none;
  opacity: 0.85;
}

.site-nav {
  display: flex;
  gap: var(--space-sm);
}

.site-nav a {
  color: var(--text-light);
  font-size: var(--font-size-base);
}

.site-nav a:hover {
  color: var(--accent);
}

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

/* ============================================
   Main Content
   ============================================ */
main {
  padding: var(--space-md) 0 var(--space-lg);
}

/* ============================================
   Homepage Hero
   ============================================ */
.hero {
  margin-bottom: var(--space-lg);
  padding: var(--space-lg) 0 var(--space-md);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
  color: var(--accent);
}

.hero .tagline {
  color: var(--text-light);
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  margin-bottom: var(--space-sm);
}

.hero p:last-child {
  color: var(--text-light);
  max-width: 600px;
}

/* ============================================
   Project Cards
   ============================================ */
.projects-section {
  margin-bottom: var(--space-lg);
}

.projects-section h2 {
  margin-bottom: var(--space-sm);
}

.project-list {
  list-style: none;
  padding: 0;
}

.project-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border);
}

.project-list li:last-child {
  border-bottom: none;
}

.project-list a {
  font-weight: 500;
  color: var(--text);
}

.project-list a:hover {
  color: var(--accent);
}

.project-item .project-link {
  display: block;
  color: var(--text);
}

.project-item .project-link:hover {
  text-decoration: none;
}

.project-item .project-link:hover .project-title {
  color: var(--accent);
}

.project-title {
  font-size: var(--font-size-h3);
  transition: color 0.15s ease;
}

.project-tagline {
  color: var(--text-light);
  font-size: var(--font-size-small);
  margin-top: 0.25rem;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

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

@media (min-width: 900px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.project-card {
  background: var(--bg-raised);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: box-shadow 0.2s ease;
}

.project-card:hover {
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  border-color: var(--accent-dark);
}

.project-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.project-card-content {
  padding: var(--space-sm);
}

.project-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-xs);
}

.project-card h3 a {
  color: var(--text);
}

.project-card h3 a:hover {
  color: var(--accent);
}

.project-card p {
  color: var(--text-light);
  font-size: var(--font-size-small);
  margin-bottom: var(--space-xs);
}

.project-card .tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--text-light);
  background: var(--bg);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

/* ============================================
   Project Page
   ============================================ */
.project-header {
  margin-bottom: var(--space-md);
}

.project-header h1 {
  margin-bottom: var(--space-xs);
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.project-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 6px;
  font-size: var(--font-size-small);
  font-weight: 600;
}

.project-links a:hover {
  background: var(--accent-dark);
  text-decoration: none;
}

.project-links a:visited {
  color: var(--bg);
}

.project-meta {
  color: var(--text-light);
  font-size: var(--font-size-small);
  margin-bottom: var(--space-lg);
}

.project-meta .tech-stack {
  margin-bottom: var(--space-xs);
}

.project-story {
  max-width: var(--max-width-prose);
}

.project-story h2 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.project-story p {
  margin-bottom: var(--space-sm);
}

/* ============================================
   Blog List
   ============================================ */
.blog-list {
  max-width: var(--max-width-prose);
}

.blog-year {
  margin-top: var(--space-md);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-h3);
}

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

.blog-entries {
  list-style: none;
}

.blog-entry {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--border);
}

.blog-entry:last-child {
  border-bottom: none;
}

.blog-date {
  color: var(--text-light);
  font-size: var(--font-size-small);
  min-width: 5rem;
}

.blog-entry a {
  color: var(--text);
}

.blog-entry a:hover {
  color: var(--accent);
}

/* ============================================
   Blog Post
   ============================================ */
.post-header {
  margin-bottom: var(--space-md);
}

.post-header h1 {
  margin-bottom: var(--space-xs);
}

.post-date {
  color: var(--text-light);
}

.post-content {
  max-width: var(--max-width-prose);
}

.post-content h2 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.post-content h3 {
  margin-top: var(--space-md);
  margin-bottom: var(--space-sm);
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--space-sm);
  padding-left: var(--space-md);
}

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

.post-content code {
  background: var(--bg-raised);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.9em;
  border: 1px solid var(--border);
}

.post-content pre {
  background: var(--bg-raised);
  color: var(--text);
  padding: var(--space-sm);
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: var(--space-sm);
  border: 1px solid var(--border);
}

.post-content pre code {
  background: none;
  padding: 0;
  border: none;
}

.post-content img {
  max-width: 100%;
  border-radius: 6px;
  margin: var(--space-sm) 0;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: var(--space-sm);
  margin: var(--space-sm) 0;
  color: var(--text-light);
  font-style: italic;
}

/* ============================================
   Back Links
   ============================================ */
.back-link {
  display: inline-block;
  margin-top: var(--space-lg);
  color: var(--text-light);
  font-size: var(--font-size-small);
}

.back-link:hover {
  color: var(--accent);
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border);
  color: var(--text-light);
  font-size: var(--font-size-small);
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

@media (min-width: 480px) {
  .site-footer .container {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-links {
  display: flex;
  gap: var(--space-sm);
}

.footer-links a {
  color: var(--text-light);
}

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

/* ============================================
   Utilities
   ============================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mt-md {
  margin-top: var(--space-md);
}

.text-light {
  color: var(--text-light);
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}