/* ═══════════════════════════════════════════
   LUYUAN GE — HACKER PORTFOLIO CSS
   Theme: ELECTRIC_CYAN / MATRIX_DARK
   ═══════════════════════════════════════════ */

:root {
  --bg:          #050505;
  --bg-card:     #0c0c0e;
  --bg-terminal: #08080a;
  --border:      #1a1a1f;
  --border-lt:   #2a2a32;
  
  --text:        #b0b0bc;
  --text-dim:    #5a5a68;
  --text-bright: #ffffff;
  
  --accent:      #00ffcc; /* Electric Cyan */
  --accent-dim:  #00ffcc33;
  --accent-glow: #00ffcc18;
  
  --red:         #ff4444;
  --yellow:      #ffcc00;
  --green:       #00ff66;

  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  cursor: none; /* Hide default cursor */
}

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

a {
  color: inherit;
  text-decoration: none;
  cursor: none; /* Hide default cursor on links too */
}

ul { list-style: none; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

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

/* ── Custom Scrollbar ── */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
  border-left: 1px solid var(--border);
}
::-webkit-scrollbar-thumb {
  background: var(--border-lt);
  border-radius: 0;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ── Custom Cursor ── */
.custom-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 20px;
  height: 20px;
  border: 1px solid var(--accent);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: difference;
  transition: transform 0.1s ease-out, width 0.2s, height 0.2s, background-color 0.2s;
}

.custom-cursor::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 4px;
  background: var(--accent);
  transform: translate(-50%, -50%);
  border-radius: 50%;
}

/* Hover state for cursor */
.hover-active .custom-cursor {
  width: 40px;
  height: 40px;
  background-color: rgba(0, 255, 204, 0.1);
  border-color: var(--accent);
}

/* ── CRT & Scanlines ── */
.crt-overlay {
  position: fixed;
  inset: 0;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), 
              linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
  background-size: 100% 4px, 3px 100%;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.15;
}

.scanlines {
  position: fixed;
  inset: 0;
  background: linear-gradient(transparent 0%, rgba(0, 255, 204, 0.05) 50%, transparent 100%);
  background-size: 100% 8px;
  z-index: 9997;
  pointer-events: none;
  animation: scan 10s linear infinite;
  opacity: 0.3;
}

@keyframes scan {
  from { background-position: 0 0; }
  to { background-position: 0 100%; }
}

/* ── HUD Overlay ── */
.hud {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 900;
  font-size: 0.7rem;
  color: var(--text-dim);
  text-align: right;
  pointer-events: none;
  mix-blend-mode: screen;
}

.hud__group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hud__label {
  font-size: 0.6rem;
  color: var(--accent);
  opacity: 0.7;
}

.hud__value {
  color: var(--text-bright);
  font-family: var(--font-mono);
}

.hud__scanline {
  position: absolute;
  top: 0;
  left: -10px;
  width: 2px;
  height: 100%;
  background: var(--accent);
  opacity: 0.5;
  box-shadow: 0 0 10px var(--accent);
}

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(5, 5, 5, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: 1px;
}

.nav__links {
  display: flex;
  gap: 32px;
}

.nav__link {
  font-size: 0.75rem;
  color: var(--text-dim);
  transition: all 0.3s;
  cursor: none; /* Hide default cursor */
}

.nav__link:hover, .nav__link--active {
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent-dim);
}

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 64px;
  z-index: 10;
}

#matrixCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.15;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

.hero__terminal {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 0 0 12px 12px;
  padding: 48px;
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.6);
  position: relative;
  overflow: hidden;
  /* 3D Tilt container */
  transform-style: preserve-3d;
  perspective: 1000px;
}

.terminal-header {
  background: #1a1a1f;
  padding: 10px 20px;
  border-radius: 12px 12px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-bottom: none;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot.red { background: var(--red); }
.dot.yellow { background: var(--yellow); }
.dot.green { background: var(--green); }

.terminal-title {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: 12px;
}

.hero__label {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.hero__name {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.1;
  margin-bottom: 24px;
  text-shadow: 0 0 20px var(--accent-dim);
}

.cursor {
  display: inline-block;
  width: 0.6em;
  height: 0.15em;
  background: var(--accent);
  margin-left: 4px;
  animation: blink 1s step-end infinite;
  vertical-align: baseline;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero__tagline {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.hero__subline {
  color: var(--text-dim);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero__links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.hero__link {
  font-size: 0.85rem;
  color: var(--text-dim);
  padding: 10px 20px;
  border: 1px solid var(--border);
  transition: all 0.3s;
  background: rgba(255, 255, 255, 0.02);
  cursor: none; /* Hide default cursor */
}

.hero__link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 0 20px var(--accent-dim);
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  right: 32px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.hero__scroll span {
  font-size: 0.65rem;
  letter-spacing: 2px;
  color: var(--text-dim);
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ── SECTIONS ── */
.section {
  padding: 120px 0;
}

.section__header {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 64px;
}

.section__title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: 2px;
  min-width: 250px;
}

.section__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
}

/* ── ABOUT ── */
.terminal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  border-radius: 8px;
  position: relative;
  /* 3D Tilt Setup */
  transform-style: preserve-3d;
  transform: perspective(1000px);
}

.terminal-card::before {
  content: 'FILE: profile.txt';
  position: absolute;
  top: -10px;
  left: 20px;
  background: var(--bg);
  padding: 0 10px;
  font-size: 0.7rem;
  color: var(--text-dim);
}

.about__summary {
  font-size: 1.1rem;
  line-height: 1.8;
}

.edu-card {
  padding: 32px;
  border-left: 2px solid var(--accent);
  background: rgba(0, 255, 204, 0.03);
}

.edu-school { color: var(--text-bright); margin-bottom: 8px; }
.edu-meta { display: flex; justify-content: space-between; margin: 16px 0; font-size: 0.85rem; color: var(--accent); }
.edu-courses { font-size: 0.85rem; color: var(--text-dim); }

/* ── EXPERIENCE ── */
.timeline {
  display: flex;
  flex-direction: column;
}

.timeline__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 24px;
}

.timeline__marker {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timeline__dot {
  width: 12px;
  height: 12px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  margin-top: 12px;
}

.timeline__line-v {
  width: 1px;
  flex: 1;
  background: var(--border);
}

.timeline__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  margin-bottom: 48px;
  transition: all 0.1s; /* Faster for tilt */
  /* 3D Tilt Setup */
  transform-style: preserve-3d;
  transform: perspective(1000px);
}

.timeline__company-box {
  display: flex;
  align-items: center;
  gap: 16px;
}

.company-logo {
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s var(--ease-out);
}

.company-logo:hover {
  transform: scale(1.1);
  filter: drop-shadow(0 0 8px var(--accent-dim));
}

.unicom-logo svg {
  height: 32px;
  width: auto;
}

.bytedance-logo svg {
  height: 32px;
  width: auto;
}

.timeline__company { font-size: 1.2rem; color: var(--text-bright); }

.timeline__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.timeline__date { font-size: 0.8rem; color: var(--accent); }
.timeline__location { font-size: 0.75rem; color: var(--text-dim); }

.timeline__list { margin-top: 20px; }
.timeline__list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 12px;
  font-size: 0.95rem;
}
.timeline__list li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ── PROJECTS ── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.1s;
  /* 3D Tilt Setup */
  transform-style: preserve-3d;
  transform: perspective(1000px);
}

.project-card__top {
  display: flex;
  justify-content: space-between;
  margin-bottom: 24px;
  font-size: 0.7rem;
  transform: translateZ(20px); /* Parallax */
}

.project-card__id { color: var(--accent); }
.project-card__status { color: var(--text-dim); border: 1px solid var(--border); padding: 2px 8px; }

.project-card__title { font-size: 1.1rem; color: var(--text-bright); margin-bottom: 16px; transform: translateZ(30px); }
.project-card__desc { font-size: 0.9rem; color: var(--text-dim); flex: 1; margin-bottom: 24px; transform: translateZ(20px); }

.project-card__tags { display: flex; flex-wrap: wrap; gap: 8px; transform: translateZ(20px); }
.tag { font-size: 0.7rem; color: var(--accent); border: 1px solid var(--accent-dim); padding: 4px 10px; }

/* ── SKILLS TERMINAL ── */
.skills__terminal {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transform-style: preserve-3d;
  transform: perspective(1000px);
}

.skills__terminal-header {
  background: #1a1a1f;
  padding: 8px 20px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.skills__grid {
  padding: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}

.skills__label { font-size: 0.8rem; color: var(--accent); margin-bottom: 20px; letter-spacing: 1px; }
.skills__tags { display: flex; flex-wrap: wrap; gap: 10px; }
.skill-tag { font-size: 0.85rem; padding: 6px 12px; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); transition: all 0.2s; }
.skill-tag:hover { border-color: var(--accent); color: var(--text-bright); background: var(--accent-glow); transform: translateY(-2px); }

/* ── CONTACT ── */
.contact__terminal {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.contact__prompt { font-size: 1.5rem; color: var(--text-bright); margin-bottom: 48px; }

.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.contact__btn {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all 0.3s;
  cursor: none; /* Hide default cursor */
}

.contact__btn:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.btn__label { font-size: 0.7rem; color: var(--accent); margin-bottom: 8px; }
.btn__value { font-size: 0.9rem; color: var(--text-bright); }

/* ── FOOTER ── */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.footer__inner { display: flex; justify-content: space-between; align-items: center; }
.footer__status { color: var(--green); }

/* ── REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s var(--ease-out);
}
.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── CLI TERMINAL ── */
.cli-wrapper {
  position: fixed;
  bottom: 32px;
  left: 32px;
  width: 380px;
  max-width: 90vw;
  background: rgba(5, 5, 5, 0.95);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 0; /* Reset padding to handle inner structure */
  font-family: var(--font-mono);
  font-size: 0.8rem;
  z-index: 1001; /* Above nav */
  box-shadow: 0 0 20px rgba(0, 255, 204, 0.15);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Terminal Header */
.cli-wrapper::before {
  content: 'TERMINAL // INTERACTIVE_MODE';
  display: block;
  height: 32px;
  line-height: 32px;
  background: rgba(0, 255, 204, 0.1);
  border-bottom: 1px solid var(--accent-dim);
  color: var(--accent);
  font-size: 0.7rem;
  padding-left: 12px;
  letter-spacing: 1px;
  font-weight: 700;
  flex-shrink: 0;
}

/* Terminal Content Container */
.cli-content {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cli-wrapper:focus-within {
  box-shadow: 0 0 25px rgba(0, 255, 204, 0.25);
  border-color: var(--text-bright);
}

.cli-history {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 200px;
  overflow-y: auto;
  color: var(--text-dim);
  padding: 12px 12px 0 12px; /* Top/Side padding */
}

/* Scrollbar for history */
.cli-history::-webkit-scrollbar { width: 4px; }
.cli-history::-webkit-scrollbar-thumb { background: var(--accent-dim); }

.cli-line { display: flex; gap: 8px; word-wrap: break-word; line-height: 1.4; }
.cli-line.success { color: var(--green); }
.cli-line.error { color: var(--red); }
.cli-line.info { color: var(--accent); }

.cli-input-line {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  padding: 8px 12px 12px 12px; /* Bottom/Side padding */
  flex-shrink: 0;
}

.cli-prompt {
  color: var(--green);
  font-weight: 700;
  white-space: nowrap;
}

.cli-input {
  background: transparent;
  border: none;
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  width: 100%;
  outline: none;
  caret-color: var(--accent);
  padding: 0;
  margin: 0;
}

.cli-input::placeholder {
  color: var(--text-dim);
  opacity: 0.5;
}

/* ── SONAR PULSE ── */
.sonar-pulse {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  transform: translate(-50%, -50%) scale(0);
  pointer-events: none;
  z-index: 9995;
  animation: sonarAnim 0.6s ease-out forwards;
  box-shadow: 0 0 10px var(--accent-glow);
}

@keyframes sonarAnim {
  0% { transform: translate(-50%, -50%) scale(0); opacity: 1; border-width: 2px; }
  100% { transform: translate(-50%, -50%) scale(4); opacity: 0; border-width: 0; }
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }
  .hero__terminal { padding: 24px; }
  .hero__name { font-size: 3rem; }
  .hero__scroll { display: none; }
  .about__grid { display: block; }
  .about__edu { margin-top: 32px; }
  .timeline__item { grid-template-columns: 20px 1fr; }
  .hud { display: none; } /* Hide HUD on mobile to save space */
  .custom-cursor { display: none; } /* Disable custom cursor on mobile */
  .cli-wrapper { display: none; } /* Hide CLI on mobile */
  html, a, .hero__link, .contact__btn, .nav__link { cursor: auto; } /* Restore cursor on mobile */
}

/* ── GLITCH EFFECT ── */
.glitch {
  position: relative;
  display: inline-block;
}

.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg);
}

.glitch::before {
  left: 2px;
  text-shadow: -2px 0 #ff00c1;
  clip: rect(44px, 450px, 56px, 0);
  animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch::after {
  left: -2px;
  text-shadow: -2px 0 #00fff9, 2px 2px #ff00c1;
  animation: glitch-anim2 1s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
  0% { clip: rect(31px, 9999px, 94px, 0); }
  20% { clip: rect(62px, 9999px, 42px, 0); }
  40% { clip: rect(16px, 9999px, 78px, 0); }
  60% { clip: rect(84px, 9999px, 14px, 0); }
  80% { clip: rect(53px, 9999px, 26px, 0); }
  100% { clip: rect(11px, 9999px, 62px, 0); }
}

@keyframes glitch-anim2 {
  0% { clip: rect(65px, 9999px, 100px, 0); }
  20% { clip: rect(12px, 9999px, 58px, 0); }
  40% { clip: rect(95px, 9999px, 33px, 0); }
  60% { clip: rect(41px, 9999px, 76px, 0); }
  80% { clip: rect(27px, 9999px, 89px, 0); }
  100% { clip: rect(54px, 9999px, 12px, 0); }
}