/* ===========================
   Custom Properties / Theme
=========================== */
:root {
  --ink: #17140f;
  --ink-soft: #5c574d;
  --ink-faint: #8a8478;
  --paper: #f8f5ee;
  --paper-alt: #efe9dd;
  --surface: #fbf8f2;
  --line: #ddd5c4;
  --line-strong: #c7bda5;

  --accent: #a8432a;
  --accent-soft: rgba(168, 67, 42, 0.09);

  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;

  --shadow-sm: 0 1px 2px rgba(23, 20, 15, 0.05);
  --shadow-md: 0 6px 20px rgba(23, 20, 15, 0.08);

  --container-width: 1160px;
  --transition-fast: 0.2s ease;
  --transition-med: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --ink: #f0ebe0;
  --ink-soft: #b3ac9d;
  --ink-faint: #7d7669;
  --paper: #131210;
  --paper-alt: #1a1815;
  --surface: #18160f;
  --line: #322d24;
  --line-strong: #453f32;

  --accent: #dd7c53;
  --accent-soft: rgba(221, 124, 83, 0.12);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition-med), color var(--transition-med);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

section { position: relative; padding: 112px 0; }
section.alt-bg { background: var(--paper-alt); }

.kicker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
}
.kicker::before {
  content: '';
  width: 22px;
  height: 1px;
  background: var(--accent);
  align-self: center;
}

.section-heading {
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  font-weight: 500;
  margin-bottom: 16px;
}

.section-sub {
  color: var(--ink-soft);
  font-size: 1.02rem;
  max-width: 560px;
  margin-bottom: 56px;
}
.section-sub a { color: var(--ink); border-bottom: 1px solid var(--line-strong); transition: border-color var(--transition-fast); }
.section-sub a:hover { border-color: var(--accent); color: var(--accent); }

.section-header { display: flex; flex-direction: column; }

/* ===========================
   Scroll reveal
=========================== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.06s; }
.reveal-delay-2 { transition-delay: 0.12s; }
.reveal-delay-3 { transition-delay: 0.18s; }
.reveal-delay-4 { transition-delay: 0.24s; }

/* ===========================
   Buttons
=========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.92rem;
  border: 1px solid transparent;
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--accent); }
.btn-outline {
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--ink); }

/* ===========================
   Navbar
=========================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 22px 0;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-med), border-color var(--transition-med), padding var(--transition-med);
}
.navbar.scrolled {
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--line);
  padding: 16px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-dot { width: 6px; height: 6px; background: var(--accent); }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color var(--transition-fast);
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 3px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  transition: border-color var(--transition-fast);
}
.theme-toggle:hover { border-color: var(--ink); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

.nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  width: 15px;
  height: 1px;
  background: var(--ink);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ===========================
   Hero
=========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}
.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  margin-bottom: 26px;
}
.hero-title .line { display: block; }
.hero-title .highlight {
  color: var(--accent);
  font-style: italic;
  font-weight: 500;
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 460px;
  margin-bottom: 40px;
}
.hero-desc strong { color: var(--ink); font-weight: 600; }

.hero-actions { display: flex; gap: 14px; margin-bottom: 56px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}
.stat {
  padding-right: 32px;
  margin-right: 32px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: none; margin-right: 0; padding-right: 0; }
.hero-stats .stat-num {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 500;
  color: var(--ink);
}
.hero-stats .stat-label { font-size: 0.8rem; color: var(--ink-faint); margin-top: 4px; }

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.identity-block {
  width: 100%;
  max-width: 320px;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 56px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}
.identity-mono {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 4.5rem;
  line-height: 1;
  color: var(--ink);
}
.identity-rule { width: 32px; height: 1px; background: var(--line-strong); }
.identity-caption {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  text-align: center;
  line-height: 1.8;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}
.scroll-indicator .mouse {
  width: 20px;
  height: 32px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}
.scroll-indicator .wheel {
  width: 3px;
  height: 6px;
  background: var(--ink-faint);
  border-radius: 2px;
  animation: scrollWheel 1.6s infinite;
}
@keyframes scrollWheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(8px); }
}

/* ===========================
   About
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  align-items: start;
}
.about-photo {
  border: 1px solid var(--line);
  background: var(--surface);
  aspect-ratio: 3/4;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-photo-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 40px;
  text-align: center;
}
.about-photo-mono {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 2.4rem;
  color: var(--ink);
}
.about-photo-role { font-size: 0.85rem; color: var(--ink-soft); line-height: 1.6; }
.about-photo-divider { width: 32px; height: 1px; background: var(--line-strong); }

.about-text p { color: var(--ink-soft); margin-bottom: 18px; font-size: 1.02rem; }
.about-text p strong { color: var(--ink); font-weight: 600; }

.about-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin-top: 36px;
}
.info-item {
  padding: 18px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.info-item .info-label { font-size: 0.74rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px; }
.info-item .info-value { font-weight: 500; font-family: var(--font-display); font-size: 1.05rem; }

/* ===========================
   Skills
=========================== */
.skill-list {
  border-top: 1px solid var(--line);
}
.skill-row {
  display: flex;
  gap: 32px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.skill-index {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent);
  width: 32px;
  flex-shrink: 0;
}
.skill-row-text h3 {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 6px;
}
.skill-row-text p { color: var(--ink-soft); font-size: 0.95rem; max-width: 560px; }

.tag-group-label {
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 44px 0 16px;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.skill-tag {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 500;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.skill-tag:hover { border-color: var(--accent); color: var(--ink); }

/* ===========================
   Projects / Software
=========================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.project-card {
  background: var(--paper);
  display: flex;
  flex-direction: column;
  transition: background var(--transition-fast);
}
.project-thumb {
  aspect-ratio: 21/9;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: var(--surface);
}
.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.project-meta { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.project-status { font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); }
.project-link { font-size: 0.82rem; font-weight: 500; color: var(--ink-soft); border-bottom: 1px solid transparent; transition: color var(--transition-fast), border-color var(--transition-fast); }
.project-link:hover { color: var(--ink); border-color: var(--ink); }

.project-body h3 { font-size: 1.2rem; margin-bottom: 10px; }
.project-body p { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 20px; flex: 1; }
.project-tech { display: flex; flex-wrap: wrap; gap: 8px; }
.project-tech span {
  font-size: 0.74rem;
  font-weight: 500;
  padding: 5px 11px;
  border: 1px solid var(--line);
  color: var(--ink-faint);
}

.projects-more { text-align: center; margin-top: 48px; }

/* ===========================
   Experience
=========================== */
.timeline { position: relative; max-width: 760px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line);
}
.timeline-item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 40px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--accent);
  z-index: 1;
}
.timeline-content {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}
.timeline-item:last-child .timeline-content { border-bottom: none; padding-bottom: 0; }
.timeline-date {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  margin-bottom: 10px;
}
.timeline-content h3 { font-size: 1.2rem; margin-bottom: 2px; }
.timeline-content .role-company { color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 16px; font-weight: 500; }
.timeline-content ul { display: flex; flex-direction: column; gap: 9px; }
.timeline-content li {
  color: var(--ink-soft);
  font-size: 0.92rem;
  padding-left: 16px;
  position: relative;
}
.timeline-content li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--ink-faint);
}

/* ===========================
   Contact
=========================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
}
.contact-info h2 { margin-bottom: 16px; font-size: clamp(1.9rem, 3vw, 2.6rem); }
.contact-info p { color: var(--ink-soft); margin-bottom: 40px; max-width: 420px; }
.contact-methods { border-top: 1px solid var(--line); margin-bottom: 40px; }
.contact-method {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  transition: color var(--transition-fast);
}
.contact-method:hover .cm-value { color: var(--accent); }
.contact-method .cm-label { font-size: 0.78rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.06em; }
.contact-method .cm-value { font-weight: 500; font-size: 0.98rem; transition: color var(--transition-fast); }

.contact-form {
  border: 1px solid var(--line);
  padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.form-group { margin-bottom: 24px; }
.form-group label { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-faint); margin-bottom: 10px; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 10px 2px;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-status { margin-top: 16px; font-size: 0.86rem; font-weight: 500; min-height: 20px; }
.form-status.success { color: var(--accent); }
.form-status.error { color: #b3372e; }

/* ===========================
   Footer
=========================== */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-inner p { color: var(--ink-faint); font-size: 0.85rem; }
.back-to-top {
  font-size: 0.85rem;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.back-to-top:hover { color: var(--ink); border-color: var(--ink); }

@keyframes navItemIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===========================
   Responsive
=========================== */
@media (max-width: 1000px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; margin-bottom: 8px; }
  .identity-block { max-width: 260px; padding: 40px 28px; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { max-width: 320px; margin: 0 auto; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  section { padding: 76px 0; }
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 74px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--line);
    padding: 8px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.98);
    transform-origin: top right;
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0s linear 0.22s;
  }
  .nav-links a { width: 100%; padding: 12px 14px; }
  .nav-links a::after { display: none; }

  .nav-links.mobile-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0s linear 0s;
  }
  .nav-links.mobile-open a {
    animation: navItemIn 0.32s ease backwards;
  }
  .nav-links.mobile-open a:nth-child(1) { animation-delay: 0.04s; }
  .nav-links.mobile-open a:nth-child(2) { animation-delay: 0.08s; }
  .nav-links.mobile-open a:nth-child(3) { animation-delay: 0.12s; }
  .nav-links.mobile-open a:nth-child(4) { animation-delay: 0.16s; }
  .nav-links.mobile-open a:nth-child(5) { animation-delay: 0.2s; }
  .nav-links.mobile-open a:nth-child(6) { animation-delay: 0.24s; }

  .hero-stats { flex-wrap: wrap; row-gap: 20px; }
  .stat { padding-right: 24px; margin-right: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
}