/* =============================================
   CSS Variables & Reset
   ============================================= */
:root {
  --bg:         #0a0f1e;
  --bg-light:   #112240;
  --bg-card:    #0d1b2a;
  --base-color:   #ff0000;
  --base-color-dim: rgba(255, 0, 0, 0.1);
  --text:       #ccd6f6;
  --muted:      #8892b0;
  --white:      #e6f1ff;
  --mono:       "Courier New", Courier, monospace;
  --ease:       cubic-bezier(0.645, 0.045, 0.355, 1);
  --nav-h:      70px;
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--base-color); border-radius: 3px; }

/* =============================================
   Navbar
   ============================================= */
#navbar {
  position: fixed;
  top: 0; left: 0; width: 100%;
  height: var(--nav-h);
  z-index: 1000;
  transition: background 0.4s ease, box-shadow 0.4s ease;
  padding: 0 2rem;
}

#navbar.scrolled {
  background: rgba(10, 15, 30, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 4px 30px rgba(0,0,0,0.35);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo { display: flex; align-items: center; gap: 0.7rem; }

.nav-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  object-fit: cover;
  object-position: 0 0;
  border: 2px solid var(--base-color);
  transition: transform 0.3s var(--ease);
}
.nav-avatar:hover { transform: scale(1.15) rotate(5deg); }

.logo-text {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--base-color);
  text-decoration: none;
  letter-spacing: 2px;
}

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

.nav-links .nav-link {
  color: var(--text);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: color 0.3s ease;
  position: relative;
  counter-increment: nav;
}
.nav-links .nav-link::before {
  content: "0" counter(nav) ". ";
  color: var(--base-color);
  font-size: 0.78rem;
}
.nav-links .nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--base-color);
  transition: width 0.3s ease;
}
.nav-links .nav-link:hover { color: var(--base-color); }
.nav-links .nav-link:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--base-color);
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: left center;
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg); }

/* =============================================
   Hero
   ============================================= */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#particles-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  padding: 0 2rem;
  padding-top: var(--nav-h);
  margin: 0 auto;
  text-align: center;
}

.hero-greeting {
  font-family: var(--mono);
  color: var(--base-color);
  font-size: 1.5rem;
  letter-spacing: 3px;
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.05;
  margin-bottom: 0.6rem;
}

.hero-role {
  font-size: clamp(1.4rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

#typed { color: var(--base-color); }

.cursor {
  color: var(--base-color);
  animation: blink 0.75s steps(1) infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-desc {
  color: var(--muted);
  font-size: 1rem;
  max-width: 500px;
  line-height: 1.85;
  margin: 0 auto 2.5rem;
}

.hero-cta { display: flex; gap: 1.2rem; flex-wrap: wrap; justify-content: center; }

.btn-primary {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border: 2px solid var(--base-color);
  color: var(--white);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.88rem;
  letter-spacing: 2px;
  border-radius: 4px;
  background: transparent;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s ease, color 0.3s ease;
}
.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--base-color-dim);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}
.btn-primary:hover::before { transform: translateX(0); }
.btn-primary:hover { box-shadow: 0 0 25px rgba(255,0,0,0.35); }

.btn-outline {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  color: var(--text);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.88rem;
  letter-spacing: 2px;
  transition: color 0.3s ease;
}
.btn-outline:hover { color: var(--base-color); }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 2px;
  animation: float-down 2.5s ease-in-out infinite;
}
.mouse {
  width: 22px; height: 36px;
  border: 2px solid var(--muted);
  border-radius: 11px;
  display: flex;
  justify-content: center;
  padding-top: 5px;
}
.mouse-wheel {
  width: 3px; height: 7px;
  background: var(--base-color);
  border-radius: 2px;
  animation: wheel-scroll 2.5s ease-in-out infinite;
}
@keyframes wheel-scroll {
  0%   { transform: translateY(0); opacity: 1; }
  80%  { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}
@keyframes float-down {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%     { transform: translateX(-50%) translateY(6px); }
}

/* =============================================
   Sections shared
   ============================================= */
.section { padding: 2rem 0; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-title {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 3rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  white-space: nowrap;
}
.section-title::after {
  content: "";
  display: block;
  flex: 1;
  height: 1px;
  background: var(--bg-light);
  max-width: 280px;
}
.section-num {
  font-family: var(--mono);
  color: var(--base-color);
  font-size: 1rem;
}

/* =============================================
   Experience
   ============================================= */
.exp-container {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2rem;
  min-height: 280px;
}

.exp-tabs {
  position: relative;
  display: flex;
  flex-direction: column;
  border-left: 2px solid var(--bg-light);
}

.exp-tab {
  background: none;
  border: none;
  padding: 0.85rem 1.4rem;
  text-align: left;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  cursor: pointer;
  transition: color 0.25s ease, background 0.25s ease;
  letter-spacing: 0.3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.exp-tab:hover    { color: var(--base-color); background: var(--base-color-dim); }
.exp-tab.active   { color: var(--base-color); background: var(--base-color-dim); }

.tab-indicator {
  position: absolute;
  left: -2px;
  width: 2px;
  background: var(--base-color);
  transition: top 0.3s var(--ease), height 0.3s var(--ease);
  border-radius: 2px;
}

.exp-panel {
  display: none;
  animation: panel-in 0.3s ease both;
}
.exp-panel.active { display: block; }

@keyframes panel-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.exp-panel h3 { font-size: 1.15rem; color: var(--white); margin-bottom: 0.4rem; }
.exp-company  { color: var(--base-color); font-weight: 400; }
.exp-date     { font-family: var(--mono); color: var(--muted); font-size: 0.82rem; margin-bottom: 1rem; }
.exp-intro    { margin-bottom: 0.8rem; color: var(--text); }

.exp-panel ul { list-style: none; padding: 0; }
.exp-panel ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.55rem;
  color: var(--text);
  font-size: 0.95rem;
}
.exp-panel ul li::before { content: "▹"; position: absolute; left: 0; color: var(--base-color); }

/* =============================================
   About
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-photo { display: flex; justify-content: center; }

.photo-wrapper {
  position: relative;
  width: fit-content;
}
.photo-wrapper > img {
  width: 280px; 
  height: 100%;
  object-fit: cover;
  border-radius: 10px;
  filter: grayscale(25%);
  transition: filter 0.4s ease, transform 0.4s ease;
  position: relative;
  z-index: 1;
  display: block;
  cursor: pointer;
}
.photo-wrapper > img:hover { filter: grayscale(0%); transform: translate(-5px,-5px); }

.photo-border {
  position: absolute;
  width: 280px; height: 340px;
  border: 2px solid var(--base-color);
  border-radius: 10px;
  transition: top 0.4s ease, left 0.4s ease, bottom 0.4s ease, right 0.4s ease;
}
.photo-border-tl { top: -10px; left: -10px; z-index: 0; }
.photo-border-br { bottom: -10px; right: -10px; z-index: 0; }
.photo-wrapper:hover .photo-border-tl { top: -16px; left: -16px; }
.photo-wrapper:hover .photo-border-br { bottom: -16px; right: -16px; }

.about-text p { color: var(--text); font-size: 0.97rem; line-height: 1.85; margin-bottom: 1.1rem; }
.about-text strong { color: var(--base-color); font-weight: 600; }

.skills-section { margin-top: 1.4rem; }

.github-contributions { margin-top: 3rem; display: flex; flex-direction: column; align-items: center; }
.github-contributions .skills-label { text-align: center; margin-bottom: 0.8rem; }
.contrib-total {
  display: inline-block;
  margin-top: 0.8rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--base-color);
  background: var(--base-color-dim);
  border: 1px solid rgba(255,0,0,0.2);
  padding: 0.15rem 0.6rem;
  border-radius: 20px;
}

.contrib-wrapper {
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
}
.contrib-wrapper::-webkit-scrollbar { height: 4px; }
.contrib-wrapper::-webkit-scrollbar-track { background: transparent; }
.contrib-wrapper::-webkit-scrollbar-thumb { background: var(--base-color-dim); border-radius: 2px; }

#contrib-months {
  display: flex;
  gap: 3px;
  margin-bottom: 4px;
  padding-left: 0;
}
.contrib-month-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
  white-space: nowrap;
  text-align: left;
}

#contrib-grid {
  display: flex;
  gap: 3px;
}

.contrib-week {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.contrib-day {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  background: var(--bg-card);
  flex-shrink: 0;
}
.contrib-day[data-level="1"] { background: rgba(255,0,0,0.20); }
.contrib-day[data-level="2"] { background: rgba(255,0,0,0.45); }
.contrib-day[data-level="3"] { background: rgba(255,0,0,0.70); }
.contrib-day[data-level="4"] { background: #ff0000; }
.contrib-day:hover { outline: 1px solid rgba(255,0,0,0.6); cursor: default; }
.skills-label {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 1px;
  margin-bottom: 0.65rem;
}
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.2rem;
}
.skill-tag {
  background: var(--base-color-dim);
  color: var(--base-color);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.78rem;
  border: 1px solid rgba(255,0,0,0.2);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
.skill-tag:hover {
  background: rgba(255,0,0,0.18);
  border-color: var(--base-color);
  transform: translateY(-2px);
}

/* =============================================
   Portfolio
   ============================================= */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.portfolio-card {
  background: var(--bg-card);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--bg-light);
  transition: transform 0.35s var(--ease), border-color 0.35s ease, box-shadow 0.35s ease;
}
.portfolio-card:hover {
  transform: translateY(-8px);
  border-color: var(--base-color);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.card-img-wrap { position: relative; overflow: hidden; height: 200px; }
.card-img-wrap > img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}
.portfolio-card:hover .card-img-wrap > img { transform: scale(1.06); }

.card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255,0,0,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.portfolio-card:hover .card-overlay { opacity: 1; }

.card-links { display: flex; gap: 1.5rem; }
.card-links a {
  color: var(--white);
  font-size: 1.3rem;
  text-decoration: none;
  transition: color 0.25s ease, transform 0.25s ease;
}
.card-links a:hover { color: var(--base-color); transform: translateY(-3px); }
.card-link-disabled { color: var(--muted); font-size: 1.25rem; opacity: 0.35; cursor: not-allowed; }

.card-body  { padding: 1.5rem; }
.card-label { font-family: var(--mono); color: var(--base-color); font-size: 0.72rem; letter-spacing: 2px; margin-bottom: 0.4rem; }
.card-title { font-size: 1.25rem; color: var(--white); margin-bottom: 0.7rem; }
.card-desc  { color: var(--muted); font-size: 0.88rem; line-height: 1.7; margin-bottom: 1.2rem; }

.card-tags { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.card-tags span { font-family: var(--mono); color: var(--muted); font-size: 0.76rem; }

/* =============================================
   Contact
   ============================================= */
.contact-content {
  max-width: 580px;
  margin: 0 auto;
  text-align: center;
}
.contact-content p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 2rem;
}

/* =============================================
   Social Sidebar
   ============================================= */
.social-sidebar {
  position: fixed;
  bottom: 0; left: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  z-index: 100;
  animation: slide-up 0.6s ease 0.8s both;
}
.social-sidebar a {
  color: var(--muted);
  font-size: 1.05rem;
  text-decoration: none;
  transition: color 0.25s ease, transform 0.25s ease;
}
.social-sidebar a:hover { color: var(--base-color); transform: translateY(-3px); }

.sidebar-line {
  width: 1px;
  height: 85px;
  background: var(--muted);
  margin-top: 0.4rem;
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =============================================
   Footer
   ============================================= */
#footer {
  padding: 3rem 0 2rem;
  text-align: center;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
}
#footer .accent { color: var(--base-color); }
#footer .container { display: flex; flex-direction: column; align-items: center; gap: 0.6rem; }

.github-stats {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  color: var(--muted);
}
.github-stat {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* =============================================
   Scroll Reveal
   ============================================= */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: var(--delay, 0s);
}
.reveal-up    { transform: translateY(40px); }
.reveal-left  { transform: translateX(-50px); }
.reveal-right { transform: translateX(50px); }

.reveal-up.revealed,
.reveal-left.revealed,
.reveal-right.revealed {
  opacity: 1;
  transform: translate(0, 0);
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    right: -100%;
    flex-direction: column;
    background: rgba(10,15,30,0.97);
    width: 260px;
    height: calc(100vh - var(--nav-h));
    padding: 3rem 2rem;
    gap: 2.5rem;
    transition: right 0.35s ease;
    backdrop-filter: blur(14px);
    counter-reset: nav;
  }
  .nav-links.open { right: 0; }
  .nav-toggle { display: flex; }

  .hero-content { margin: 0 auto; padding-top: calc(var(--nav-h) + 2rem); }

  .exp-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .exp-tabs {
    flex-direction: row;
    overflow-x: auto;
    border-left: none;
    border-bottom: 2px solid var(--bg-light);
    scrollbar-width: none;
  }
  .exp-tabs::-webkit-scrollbar { display: none; }
  .exp-tab { flex-shrink: 0; padding: 0.7rem 1.1rem; }
  .tab-indicator {
    width: 0 !important;
    height: 2px !important;
    top: auto !important;
    bottom: -2px !important;
    left: 0;
  }

  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }

  .social-sidebar { display: none; }
}