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

:root {
  --bg:        #0a0a0a;
  --bg-card:   #111111;
  --bg-hover:  #161616;
  --green:     #39d353;
  --green-dim: #1e7a30;
  --text:      #d0d0d0;
  --text-dim:  #666;
  --border:    #1f1f1f;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: 'Inter', system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
}

a {
  color: var(--green);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.75;
}

/* ── Nav ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-mono);
  color: var(--green);
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.cursor {
  animation: blink 1.1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav ul a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

nav ul a:hover,
nav ul a.active {
  color: var(--green);
  opacity: 1;
}

/* ── Hero ── */
#hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  max-width: 860px;
  margin: 0 auto;
}

.hero-tag {
  font-family: var(--font-mono);
  color: var(--green);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  letter-spacing: 0.08em;
}

#hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  color: #ffffff;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 520px;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.75rem 1.75rem;
  border: 1px solid var(--green);
  color: var(--green);
  border-radius: 2px;
  transition: background 0.2s, color 0.2s;
  letter-spacing: 0.05em;
}

.btn:hover {
  background: var(--green);
  color: var(--bg);
  opacity: 1;
}

/* ── Sections (shared) ── */
section {
  max-width: 960px;
  margin: 0 auto;
  padding: 5rem 2rem;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 2.5rem;
}

.section-tag {
  font-family: var(--font-mono);
  color: var(--green);
  font-size: 1rem;
  margin-right: 0.5rem;
}

.section-intro {
  color: var(--text-dim);
  margin-top: -1.5rem;
  margin-bottom: 2.5rem;
  font-size: 1rem;
}

/* ── Projects ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
  transition: border-color 0.2s, background 0.2s;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card:hover {
  border-color: var(--green-dim);
  background: var(--bg-hover);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--green);
  background: rgba(57, 211, 83, 0.08);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  border: 1px solid var(--green-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.card h3 {
  font-size: 1.05rem;
  color: #fff;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  flex: 1;
}

.card-links {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ── Real World Fixes ── */
.fix-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.fix-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  border-radius: 2px;
  padding: 1.5rem 1.75rem;
  transition: background 0.2s;
}

.fix-item:hover {
  background: var(--bg-hover);
}

.fix-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.6rem;
}

.fix-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--green);
  background: rgba(57, 211, 83, 0.08);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  border: 1px solid var(--green-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.fix-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.fix-item h3 {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 0.75rem;
}

.fix-problem,
.fix-solution {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-top: 0.4rem;
}

.label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
  margin-right: 0.4rem;
}

/* ── About ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  color: var(--text);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.about-skills h3 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--green);
  margin-bottom: 1rem;
  letter-spacing: 0.06em;
}

.about-skills ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.about-skills li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  padding-left: 1rem;
  position: relative;
}

.about-skills li::before {
  content: '>';
  color: var(--green);
  position: absolute;
  left: 0;
}

/* ── Contact ── */
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 480px;
}

.contact-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: border-color 0.2s, background 0.2s;
  color: var(--text);
}

.contact-item:hover {
  border-color: var(--green-dim);
  background: var(--bg-hover);
  opacity: 1;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.contact-value {
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ── Blog ── */
.blog-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

.blog-header {
  padding-top: 3rem;
  margin-bottom: 3rem;
}

.blog-header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
}

.blog-filter {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.35rem 0.9rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 2px;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--green);
  color: var(--green);
  background: rgba(57, 211, 83, 0.06);
}

.post-list {
  display: flex;
  flex-direction: column;
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
}

.post-card:first-child {
  border-top: 1px solid var(--border);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.post-title {
  font-size: 1.2rem;
  font-weight: 600;
}

.post-title a {
  color: #fff;
  transition: color 0.2s;
}

.post-title a:hover {
  color: var(--green);
  opacity: 1;
}

.post-excerpt {
  font-size: 0.92rem;
  color: var(--text-dim);
  max-width: 600px;
}

.post-read {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
  margin-top: 0.25rem;
  align-self: flex-start;
}

.nav-blog {
  color: var(--green) !important;
  border: 1px solid var(--green-dim);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
}

.nav-blog:hover {
  background: rgba(57, 211, 83, 0.08);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  nav ul {
    gap: 1.25rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}