/* ========================================
   Jon Miller — Portfolio
   Design system adapted from SwiftForge
   ======================================== */

:root {
  --primary: #0066cc;
  --primary-dark: #004499;
  --accent: #00cc88;
  --ink: #1a1a2e;
  --muted: #4a5568;
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --line: #e2e8f0;
  --surface: #ffffff;
  --font-body: 'DM Sans', sans-serif;
  --font-display: 'Space Grotesk', sans-serif;
  --transition: all 0.3s ease;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,102,204,0.15);
  --radius: 12px;
  --max-width: 1200px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img { max-width: 100%; height: auto; display: block; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: var(--ink);
}
h1 { font-size: clamp(2.4rem, 6vw, 4rem); letter-spacing: -1.5px; }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -1px; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
p { margin-bottom: 1rem; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }

/* Layout */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }
.section { padding: 5rem 2rem; }
.section-alt { background: var(--bg-alt); }

/* Grid */
.grid { display: grid; gap: 1.5rem; }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

/* ---- Navigation ---- */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  z-index: 1000;
  animation: slideDown 0.5s ease-out;
}
.nav-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-brand-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.pill {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--font-body);
}
.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}
.nav-links a {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links .btn-nav {
  padding: 8px 18px;
  background: linear-gradient(90deg, var(--primary), #5b21b6);
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
}
.nav-links .btn-nav:hover { opacity: 0.9; transform: translateY(-1px); color: #fff; }
.nav-links .btn-nav::after { display: none; }
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.mobile-menu-toggle span {
  width: 24px;
  height: 2.5px;
  background: var(--primary);
  border-radius: 3px;
  transition: var(--transition);
}

/* ---- Hero ---- */
.hero {
  display: flex;
  align-items: center;
  padding: 7rem 2rem 5rem;
  position: relative;
  background: linear-gradient(135deg, #f8f9fa 0%, #fff 60%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 50%; height: 100%;
  background: linear-gradient(135deg, rgba(0,102,204,0.05) 0%, rgba(0,204,136,0.05) 100%);
  clip-path: polygon(25% 0, 100% 0, 100% 100%, 0% 100%);
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-tagline {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.hero h1 { margin-bottom: 1.25rem; }
.hero-desc {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--muted);
  margin-bottom: 1.75rem;
  max-width: 540px;
}
.lang-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 1.5rem; }
.badge-lang {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.lang-python  { background:#fffbeb; border-color:#fcd34d; color:#92400e; }
.lang-javascript { background:#fef3c7; border-color:#fbbf24; color:#92400e; }
.lang-html    { background:#fee2e2; border-color:#fca5a5; color:#7f1d1d; }
.lang-css     { background:#dbeafe; border-color:#93c5fd; color:#1e3a8a; }
.lang-php     { background:#ede9fe; border-color:#c4b5fd; color:#4c1d95; }
.lang-mysql   { background:#ccfbf1; border-color:#5eead4; color:#064e3b; }
.lang-cpp     { background:#e0e7ff; border-color:#a5b4fc; color:#3730a3; }
.lang-bash    { background:#dcfce7; border-color:#86efac; color:#065f46; }
.hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Terminal widget */
.terminal {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 1.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  box-shadow: var(--shadow-md);
}
.term-cmd { color: var(--muted); margin-bottom: 4px; }
.term-out { color: var(--ink); font-weight: 600; }
.term-block { margin-bottom: 1rem; }
.caret {
  display: inline-block;
  width: 8px;
  height: 1em;
  background: var(--primary);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}
.btn-primary {
  background: linear-gradient(90deg, var(--primary), #5b21b6);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0,102,204,0.25);
}
.btn-primary:hover {
  opacity: 0.9;
  box-shadow: 0 6px 20px rgba(0,102,204,0.35);
  transform: translateY(-2px);
  color: #fff;
}
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-secondary:hover {
  background: var(--primary);
  color: #fff;
}

/* ---- Section header ---- */
.section-header { text-align: center; margin-bottom: 3rem; }
.section-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}
.section-title { margin-bottom: 0.75rem; }
.section-desc { font-size: 1.05rem; color: var(--muted); max-width: 560px; margin: 0 auto; }

/* ---- Cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: var(--transition);
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius) var(--radius) 0 0;
  opacity: 0;
  transition: var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card:hover::before { opacity: 1; }
.card h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.card h3 a { color: var(--ink); }
.card h3 a:hover { color: var(--primary); }
.card .post-meta { font-size: 0.82rem; color: var(--muted); margin-bottom: 0.6rem; }
.card p { color: var(--muted); font-size: 0.95rem; flex-grow: 1; margin-bottom: 1rem; }
.card .lang-badges { margin-top: auto; }

/* ---- Blog card (with image strip) ---- */
.blog-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.blog-card-image {
  width: 100%;
  height: 160px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}
.blog-card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.blog-card-meta { font-size: 0.82rem; color: var(--muted); margin-bottom: 0.75rem; }
.blog-tag {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(0,102,204,0.08);
  color: var(--primary);
  border-radius: 4px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-right: 4px;
  margin-bottom: 4px;
}
.blog-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; color: var(--ink); }
.blog-card h3 a { color: var(--ink); }
.blog-card h3 a:hover { color: var(--primary); }
.blog-card p { color: var(--muted); font-size: 0.93rem; flex-grow: 1; margin-bottom: 1rem; }
.read-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
}
.read-more::after { content: '→'; transition: var(--transition); }
.read-more:hover::after { transform: translateX(4px); }

/* ---- Page header (inner pages) ---- */
.page-header {
  padding: 8rem 2rem 4rem;
  background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
  text-align: center;
  position: relative;
}
.page-header::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 40%; height: 100%;
  background: linear-gradient(135deg, rgba(0,102,204,0.03) 0%, rgba(0,204,136,0.03) 100%);
  clip-path: polygon(35% 0, 100% 0, 100% 100%, 0% 100%);
}
.page-header-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.page-header h1 { margin-bottom: 0.75rem; }
.page-header p { font-size: 1.1rem; color: var(--muted); margin: 0; }

/* ---- Contact / CTA section ---- */
.cta-section { padding: 5rem 2rem; text-align: center; }
.cta-box {
  max-width: 780px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(0,102,204,0.05), rgba(0,204,136,0.05));
  border: 2px solid var(--primary);
  border-radius: 16px;
  padding: 3.5rem 3rem;
}
.cta-box h2 { margin-bottom: 1rem; }
.cta-box p { font-size: 1.1rem; color: var(--muted); margin-bottom: 2rem; }
.contact-links { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.65rem 1.4rem;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  transition: var(--transition);
}
.contact-link:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--line);
  background: var(--bg-alt);
  padding: 3rem 2rem 1.5rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
.footer-col h4 { font-family: var(--font-display); font-size: 1rem; margin-bottom: 0.75rem; }
.footer-col p, .footer-col a {
  color: var(--muted);
  font-size: 0.9rem;
  display: block;
  margin-bottom: 0.4rem;
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---- Animations ---- */
@keyframes slideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in   { animation: fadeInUp 0.7s ease-out both; }
.fade-in-1 { animation: fadeInUp 0.7s ease-out 0.15s both; }
.fade-in-2 { animation: fadeInUp 0.7s ease-out 0.3s both; }
.fade-in-3 { animation: fadeInUp 0.7s ease-out 0.45s both; }
.fade-section {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease-out, transform 0.55s ease-out;
}
.fade-section.visible { opacity: 1; transform: translateY(0); }

/* ---- Blog index filter ---- */
.blog-filter {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 6px 16px;
  border: 1.5px solid var(--line);
  background: transparent;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
  color: var(--muted);
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0,102,204,0.06);
}

/* ---- Search input (modules) ---- */
.search-input {
  width: 100%;
  padding: 0.85rem 1.2rem;
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  transition: var(--transition);
  background: #fff;
  color: var(--ink);
}
.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

/* ---- Post / case study detail ---- */
.post-hero {
  padding: 9rem 2rem 3rem;
  background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
}
@media (max-width: 600px) {
  .post-hero { padding-top: 10rem; }
  .page-header { padding-top: 10rem; }
}
.post-hero-inner { max-width: 780px; margin: 0 auto; }
.post-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 1rem; }
.post-hero h1 { margin-bottom: 0.75rem; }
.post-hero .post-meta { font-size: 0.9rem; color: var(--muted); }
.post-body { max-width: 780px; margin: 0 auto; padding: 3rem 2rem 5rem; }
.post-body h2 { margin-top: 2.5rem; margin-bottom: 1rem; }
.post-body p { color: var(--muted); font-size: 1.02rem; line-height: 1.75; }
.post-body ul { padding-left: 1.5rem; color: var(--muted); margin-bottom: 1rem; }
.post-body li { margin-bottom: 0.4rem; }
.post-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: var(--bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--primary-dark);
}
.post-body pre {
  background: #1a1a2e;
  color: #e2e8f0;
  padding: 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: 1.5rem;
  font-size: 0.87rem;
  line-height: 1.6;
}
.post-body pre code { background: none; color: inherit; padding: 0; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  /* Show terminal below hero content on tablet/mobile */
  .terminal {
    display: block;
    font-size: 0.85rem;
  }
}
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 1rem 2rem;
    gap: 0.75rem;
  }
  .nav-links.active { display: flex; }
  .mobile-menu-toggle { display: flex; }
  .section { padding: 3.5rem 1.5rem; }
  .cta-box { padding: 2.5rem 1.5rem; margin: 0 1rem; }
  .hero { padding: 5.5rem 1.5rem 3rem; }
  .hero::before { display: none; }
}