/* ===== Base ===== */
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: var(--section-padding) 0;
}

@media (max-width: 768px) {
  section {
    padding: var(--section-padding-mobile) 0;
  }
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label::before {
  content: "//";
  opacity: 0.6;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 600;
  margin-bottom: 3rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(var(--bg-rgb), 0.7);
  border-bottom: 1px solid var(--border);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1.5rem;
  height: 64px;
  max-width: 1280px;
  padding-right: 3.5rem;
}

.nav-logo {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
  font-size: 1rem;
  letter-spacing: 0.01em;
  padding-right: 1.1rem;
  border-right: 1px solid var(--border);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  white-space: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  min-width: 0;
  justify-content: flex-start;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-dim);
  transition: color var(--transition);
  position: relative;
  white-space: nowrap;
}

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

.nav-blog {
  margin-left: 0.5rem;
  padding-left: 1.25rem;
  border-left: 1px solid var(--border);
}

.nav-blog svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.nav-blog.is-active {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.theme-toggle {
  position: absolute;
  top: 50%;
  right: 1.5rem;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: all var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
}

.theme-toggle .icon-moon {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

@media (min-width: 901px) and (max-width: 1300px) {
  .nav .container {
    gap: 1rem;
  }

  .nav-logo {
    padding-right: 0.85rem;
  }

  .nav-links {
    gap: 0.7rem;
  }

  .nav-links a span {
    display: none;
  }

  .nav-blog {
    margin-left: 0.25rem;
    padding-left: 0.85rem;
  }
}

@media (max-width: 900px) {
  .nav .container {
    justify-content: flex-start;
    padding-right: 3.25rem;
  }

  .theme-toggle {
    right: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-logo {
    margin-right: 0;
    border-right: none;
    padding-right: 0;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(var(--bg-rgb), 0.97);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--transition), opacity var(--transition);
    flex: none;
  }

  .nav-links.is-open {
    max-height: calc(100vh - 64px);
    opacity: 1;
    overflow-y: auto;
  }

  .nav-links a {
    width: 100%;
    padding: 0.9rem 1.5rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links a span {
    display: inline;
  }

  .nav-blog {
    margin-left: 0;
    padding-left: 1.5rem;
    border-left: none;
  }
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 64px;
  position: relative;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.hero-eyebrow .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.hero h1 {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero h1 .highlight {
  color: var(--accent);
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-dim);
  margin-bottom: 2rem;
  min-height: 1.5em;
}

.hero-role .cursor {
  display: inline-block;
  width: 2px;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

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

.hero-desc {
  max-width: 560px;
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #071108;
  font-weight: 600;
}

.btn-primary:hover {
  box-shadow: 0 0 24px var(--accent-soft), 0 0 0 1px var(--accent);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.pub-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn-bibtex svg {
  width: 16px;
  height: 16px;
}

.btn-bibtex.is-copied {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-socials {
  display: flex;
  gap: 1.25rem;
}

.hero-socials a {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  transition: all var(--transition);
}

.hero-socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.hero-socials svg {
  width: 18px;
  height: 18px;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  animation: bob 2s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.about-text {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 700px;
  line-height: 1.8;
}

.about-text p + p {
  margin-top: 1.25rem;
}

.about-text strong {
  color: var(--text);
  font-weight: 600;
}

.about-cv-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2rem;
}

.about-cv-btn svg {
  width: 18px;
  height: 18px;
}

.about-highlight {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius);
  background: var(--accent-soft);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.about-highlight a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
}

.skill-group h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  letter-spacing: 0.03em;
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.skill-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.92rem;
}

.skill-bar {
  width: 90px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-left: 1rem;
}

.skill-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.9s ease;
}

.skill-item.is-visible .skill-bar-fill {
  transform: scaleX(var(--level));
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-dim);
  box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.6), 0 0 0 1px var(--accent-dim);
}

.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
  gap: 1rem;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.project-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  white-space: nowrap;
}

.project-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.9rem;
  display: block;
}

.project-desc {
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.project-desc ul {
  padding-left: 1.1rem;
}

.project-desc li {
  list-style: disc;
  margin-bottom: 0.4rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-summary {
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.project-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  cursor: pointer;
  padding: 0;
}

.project-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}

.project-toggle.is-open svg {
  transform: rotate(180deg);
}

.project-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.project-details .project-desc {
  margin-top: 1rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.55rem;
}

/* ===== Timeline (Experience/Education) ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 1px solid var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2.4rem;
  top: 0.3rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.timeline-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.timeline-sub {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
}

.timeline-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.timeline-desc li {
  list-style: disc;
  margin-left: 1.1rem;
  margin-bottom: 0.3rem;
}

.subsection-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 2.5rem 0 1.25rem;
}

.subsection-title:first-of-type {
  margin-top: 0;
}

.cert-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 0.85rem;
}

.cert-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), transform var(--transition);
}

.cert-item:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.cert-item-name {
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.4;
}

.cert-item-meta {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

/* ===== Contact ===== */
.contact-intro {
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 2rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  max-width: 800px;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all var(--transition);
}

.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.contact-card svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
}

.contact-card-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.contact-card-value {
  font-size: 0.95rem;
  word-break: break-word;
}

/* ===== Blog ===== */
.blog-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  max-width: 480px;
  margin: 0 auto;
  padding: 3.5rem 2rem;
  border: 1px dashed var(--border);
  border-radius: 12px;
  text-align: center;
  color: var(--text-dim);
}

.blog-placeholder svg {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

/* ===== Terminal ===== */
.terminal-window {
  background: #0d1210;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.8);
}

.terminal-titlebar {
  background: #161d1b;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-titlebar-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-left: 0.5rem;
}

.terminal-body {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  padding: 1.5rem;
  height: 420px;
  overflow-y: auto;
  line-height: 1.7;
  cursor: text;
}

.terminal-body::-webkit-scrollbar {
  width: 8px;
}

.terminal-body::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.term-line {
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 0.2rem;
}

.term-prompt {
  color: var(--accent);
}

.term-output {
  color: var(--text-dim);
}

.term-error {
  color: var(--danger);
}

.term-accent {
  color: var(--accent);
  font-weight: 600;
}

.term-input-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.term-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  outline: none;
  caret-color: var(--accent);
}

.terminal-hint {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  text-align: center;
}

/* ===== Footer ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-socials {
  display: flex;
  gap: 1rem;
}

.footer-socials a {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  transition: all var(--transition);
}

.footer-socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.footer-socials svg {
  width: 15px;
  height: 15px;
}

footer span {
  color: var(--accent);
}