/* =============================================
   Nathanael Ritchie — PORTFOLIO STYLESHEET
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&family=Syne:wght@400;700;800&display=swap');

/* ---- TOKENS ---- */
:root {
  --bg:       #0a0a0f;
  --surface:  #111118;
  --surface2: #1a1a24;
  --border:   #2a2a3a;
  --accent:   #00ff88;
  --accent2:  #7c3aed;
  --accent3:  #f59e0b;
  --text:     #e8e8f0;
  --muted:    #6b6b8a;
  --mono:     'Space Mono', monospace;
  --sans:     'Syne', sans-serif;
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* =============================================
   NAVIGATION
   ============================================= */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 3rem;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(14px);
}

.nav-logo {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: opacity 0.2s;
}
.nav-logo:hover { opacity: 0.75; }

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
}

/* underline slide-in on hover */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}
.nav-links a:hover        { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

/* active page link */
.nav-links a.active {
  color: var(--accent);
}
.nav-links a.active::after { width: 100%; }

.nav-cta {
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  padding: 0.4rem 1rem;
  border-radius: 2px;
  transition: background 0.2s, color 0.2s !important;
}
.nav-cta:hover { background: var(--accent) !important; color: var(--bg) !important; }
.nav-cta::after { display: none !important; }

/* =============================================
   BUTTONS
   ============================================= */
.btn-primary {
  background: var(--accent);
  color: var(--bg);
  padding: 0.85rem 2rem;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,255,136,0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  padding: 0.85rem 2rem;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 4px 20px rgba(0,255,136,0.1);
  transform: translateY(-2px);
}

/* =============================================
   SECTION COMMON
   ============================================= */
section {
  padding: 6rem 3rem;
  position: relative;
  z-index: 1;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 4rem;
}

.section-num {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--sans);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 200px;
}

/* =============================================
   FOOTER
   ============================================= */
footer {
  padding: 2rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}
.footer-left  { font-size: 0.7rem; color: var(--muted); }
.footer-right { font-size: 0.7rem; color: var(--muted); }

/* =============================================
   PAGE HERO (shared across inner pages)
   ============================================= */
.page-hero {
  padding: 10rem 3rem 5rem;
  border-bottom: 1px solid var(--border);
}
.page-hero-eyebrow {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.page-hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px; height: 1px;
  background: var(--accent);
}
.page-hero h1 {
  font-family: var(--sans);
  font-size: clamp(2.8rem, 7vw, 6rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}
.page-hero-sub {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.8;
  max-width: 520px;
}

/* =============================================
   TAGS
   ============================================= */
.tag {
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 2px;
  transition: border-color 0.2s, color 0.2s;
  letter-spacing: 0.05em;
}
.tag:hover { border-color: var(--accent); color: var(--accent); }

.tech-tag {
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--muted);
  letter-spacing: 0.08em;
  border-radius: 2px;
}

/* =============================================
   HOME PAGE
   ============================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 3rem 4rem;
  position: relative;
}

.hero-content { max-width: 900px; }

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.8s forwards 0.2s;
}
.hero-tag::before {
  content: '';
  display: inline-block;
  width: 24px; height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-family: var(--sans);
  font-size: clamp(3.5rem, 9vw, 8rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.8s forwards 0.4s;
}
.hero h1 .name { color: var(--text); display: block; }
.hero h1 .role {
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
  display: block;
  transition: -webkit-text-stroke-color 0.3s;
}

.hero-desc {
  max-width: 520px;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.8;
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeUp 0.8s forwards 0.6s;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.8s forwards 0.8s;
}

.hero-stats {
  position: absolute;
  right: 3rem;
  bottom: 3rem;
  display: flex;
  gap: 3rem;
  opacity: 0;
  animation: fadeUp 0.8s forwards 1s;
}
.stat { text-align: right; }
.stat-num {
  font-family: var(--sans);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.stat-label {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Home — featured previews strip */
.home-previews {
  padding: 5rem 3rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.home-previews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.preview-card {
  padding: 2rem;
  border: 1px solid var(--border);
  background: var(--bg);
  text-decoration: none;
  display: block;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}
.preview-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.preview-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.4); }
.preview-card:hover::before { transform: scaleX(1); }
.preview-icon { font-size: 1.5rem; margin-bottom: 1rem; display: block; }
.preview-title {
  font-family: var(--sans);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.preview-desc { font-size: 0.78rem; color: var(--muted); line-height: 1.7; margin-bottom: 1.25rem; }
.preview-link { font-size: 0.7rem; color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase; transition: gap 0.2s; display: inline-flex; align-items: center; gap: 0.3rem; }
.preview-card:hover .preview-link { gap: 0.6rem; }

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.about-text p {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.9;
  margin-bottom: 1.5rem;
}
.about-text p strong { color: var(--text); }

.skills-section { padding-top: 0; }
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.skill-cat-title {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 0;
  width: 1px;
  background: var(--border);
}
.timeline-item {
  position: relative;
  padding-bottom: 3rem;
  padding-left: 2.5rem;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s, transform 0.5s;
}
.timeline-item.visible { opacity: 1; transform: translateX(0); }

.timeline-dot {
  position: absolute;
  left: -2.45rem; top: 8px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
.timeline-date {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.timeline-role {
  font-family: var(--sans);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.timeline-company { font-size: 0.8rem; color: var(--muted); margin-bottom: 1rem; }
.timeline-desc { font-size: 0.8rem; color: var(--muted); line-height: 1.8; }
.timeline-desc li {
  margin-bottom: 0.4rem;
  list-style: none;
  padding-left: 1rem;
  position: relative;
}
.timeline-desc li::before {
  content: '→';
  position: absolute; left: 0;
  color: var(--accent);
  font-size: 0.7rem;
}

/* =============================================
   PROJECTS PAGE
   ============================================= */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  cursor: default;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.project-card:hover::before { transform: scaleX(1); }

.project-card a {
  color: inherit;
  text-decoration: none;
  display: block;
}

.project-card.featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.project-num {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}
.project-title {
  font-family: var(--sans);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.project-desc {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.5rem; }
.project-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.project-link {
  font-size: 0.7rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.2s;
}
.project-link:hover { gap: 0.6rem; }

.project-visual {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.code-preview {
  font-size: 0.65rem;
  color: var(--muted);
  padding: 1.5rem;
  line-height: 1.7;
  width: 100%;
}
.code-kw  { color: var(--accent2); }
.code-fn  { color: var(--accent); }
.code-str { color: var(--accent3); }
.code-cm  { color: var(--muted); opacity: 0.6; }

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-wrapper {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-intro p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 1.5rem;
}
.contact-intro p strong { color: var(--text); }
.contact-intro a { color: var(--muted); text-decoration: underline; }

.contact-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  cursor: default;
}
.contact-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.contact-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.contact-card:hover::before { transform: scaleX(1); }

.contact-card a {
  color: inherit;
  text-decoration: none;
  display: block;
}

.contact-num {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}
.contact-title {
  font-family: var(--sans);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.contact-desc {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 0;
}

.contact-social { margin-top: 2rem; }
.contact-social-title {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.social-links { display: flex; flex-direction: column; gap: 0.5rem; }
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s, border-color 0.2s, padding-left 0.2s;
}
.social-link:hover { color: var(--accent); border-color: var(--accent); padding-left: 0.5rem; }

/* Contact Form */
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-label {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}
.form-input,
.form-textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.85rem 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
  border-radius: 2px;
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,255,136,0.08);
}
.form-textarea { resize: vertical; min-height: 140px; }
.form-input::placeholder,
.form-textarea::placeholder { color: var(--muted); opacity: 0.5; }

.form-submit {
  align-self: flex-start;
  margin-top: 0.5rem;
}

.form-status {
  font-size: 0.75rem;
  margin-top: 0.5rem;
  color: var(--accent);
  display: none;
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { gap: 1.5rem; }

  section      { padding: 4rem 1.5rem; }
  .hero        { padding: 7rem 1.5rem 4rem; }
  .page-hero   { padding: 8rem 1.5rem 4rem; }
  .hero-stats  { display: none; }

  .about-grid          { grid-template-columns: 1fr; gap: 3rem; }
  .skills-grid         { grid-template-columns: 1fr 1fr; }
  .project-card.featured { grid-column: span 1; grid-template-columns: 1fr; }
  .home-previews-grid  { grid-template-columns: 1fr; }
  .contact-wrapper     { grid-template-columns: 1fr; gap: 3rem; }
  footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .skills-grid { grid-template-columns: 1fr; }
}