/* =========================================================
   Trần Tuấn Anh — Cybersecurity Portfolio
   Theme: Hacker / Terminal (Upgraded)
   ========================================================= */

:root {
  /* Core palette */
  --bg-0: #07090d;
  --bg-1: #0b0f15;
  --bg-2: #0f141c;
  --bg-elev: #131a23;
  --border: #1d2733;
  --border-strong: #2a3a4d;

  /* Text */
  --text-0: #e6f1ff;
  --text-1: #c2d1e6;
  --text-2: #8a9bb1;
  --text-3: #5c6d83;

  /* Accents */
  --neon: #9fef00;
  --neon-soft: #7bc400;
  --cyan: #00d4ff;
  --cyan-soft: #0aa9d6;
  --amber: #ffb700;
  --pink: #ff3e88;
  --red: #ff5c5c;

  --glow-neon: 0 0 18px rgba(159, 239, 0, 0.45);
  --glow-cyan: 0 0 18px rgba(0, 212, 255, 0.40);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.45);

  --maxw: 1180px;
  --radius: 14px;
  --radius-sm: 8px;

  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --t: 220ms cubic-bezier(.2, .9, .25, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-1);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 500px at 12% 0%, rgba(159, 239, 0, 0.08), transparent 60%),
    radial-gradient(800px 600px at 95% 30%, rgba(0, 212, 255, 0.06), transparent 60%),
    radial-gradient(700px 500px at 50% 95%, rgba(159, 239, 0, 0.05), transparent 60%);
  pointer-events: none;
  z-index: -1;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(to bottom, rgba(255, 255, 255, 0.012) 0 1px, transparent 1px 3px);
  pointer-events: none;
  z-index: 1;
}

#matrix {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.18;
  pointer-events: none;
}

nav, section, footer { position: relative; z-index: 2; }

a { color: inherit; text-decoration: none; transition: color var(--t); }
img { max-width: 100%; display: block; }

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

/* NAVBAR */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(7, 9, 13, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background var(--t), border-color var(--t);
}
.nav-container {
  max-width: var(--maxw); margin: 0 auto;
  padding: 14px 24px;
  display: flex; justify-content: space-between; align-items: center;
}
.nav-logo {
  font-family: var(--font-mono);
  font-weight: 700; font-size: 1.15rem;
  color: var(--text-0); letter-spacing: 0.4px;
}
.logo-bracket { color: var(--neon); }
.nav-menu { display: flex; list-style: none; gap: 6px; }
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem; font-weight: 500;
  color: var(--text-2);
  border: 1px solid transparent;
  transition: all var(--t);
}
.nav-link:hover {
  color: var(--neon);
  border-color: rgba(159, 239, 0, 0.35);
  background: rgba(159, 239, 0, 0.05);
}
.nav-link.active {
  color: var(--neon);
  border-color: rgba(159, 239, 0, 0.45);
  background: rgba(159, 239, 0, 0.08);
}
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.hamburger .bar { width: 24px; height: 2px; background: var(--neon); transition: var(--t); }
.hamburger.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active .bar:nth-child(2) { opacity: 0; }
.hamburger.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* HERO */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 110px 24px 60px; }
.hero-container {
  max-width: var(--maxw); margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: 1.25fr 1fr; gap: 60px; align-items: center;
}
.terminal-window {
  background: linear-gradient(180deg, #0d1218 0%, #0a0f15 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(159, 239, 0, 0.05) inset;
  position: relative;
}
.terminal-window::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, rgba(159,239,0,0.4), transparent 35%, rgba(0,212,255,0.3));
  -webkit-mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}
.terminal-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  background: rgba(13, 18, 24, 0.9);
  border-bottom: 1px solid var(--border);
}
.terminal-dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }
.terminal-title { margin-left: auto; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-3); }
.terminal-body { padding: 22px 24px 26px; font-family: var(--font-mono); }
.typing-text { font-size: 0.92rem; color: var(--text-2); margin-top: 14px; }
.typing-text:first-child { margin-top: 0; }
.prompt { color: var(--neon); margin-right: 8px; font-weight: 600; }

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  font-weight: 700; color: var(--text-0);
  margin: 6px 0 4px;
  letter-spacing: -0.5px;
  text-shadow: 0 0 22px rgba(159, 239, 0, 0.25);
}
.hero-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 600; color: var(--neon);
  margin: 4px 0;
}
.hero-location { font-family: var(--font-mono); font-size: 0.92rem; color: var(--text-1); margin-top: 4px; }
.hero-location i { color: var(--cyan); margin-right: 6px; }
.cursor {
  display: inline-block; width: 9px; height: 1.05em;
  background: var(--neon);
  margin-left: 4px;
  vertical-align: text-bottom;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero-description {
  margin-top: 22px; font-size: 1rem;
  color: var(--text-1); line-height: 1.75;
  max-width: 560px;
}
.hero-buttons { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 22px; border-radius: 10px;
  font-family: var(--font-mono); font-size: 0.9rem; font-weight: 600;
  letter-spacing: 0.3px; cursor: pointer;
  border: 1px solid transparent; transition: all var(--t);
}
.btn-primary { background: var(--neon); color: #0a0e14; box-shadow: var(--glow-neon); }
.btn-primary:hover { background: #b6ff1a; transform: translateY(-2px); box-shadow: 0 0 28px rgba(159, 239, 0, 0.6); }
.btn-secondary { background: transparent; color: var(--cyan); border-color: rgba(0, 212, 255, 0.45); }
.btn-secondary:hover { background: rgba(0, 212, 255, 0.08); box-shadow: var(--glow-cyan); transform: translateY(-2px); }

.hero-image { display: flex; justify-content: center; }
.avatar-container { position: relative; width: 280px; height: 280px; }
.avatar {
  width: 100%; height: 100%; object-fit: cover;
  border-radius: 50%;
  border: 2px solid rgba(159, 239, 0, 0.6);
  position: relative; z-index: 2;
  filter: contrast(1.05) saturate(1.05);
}
.avatar-glow {
  position: absolute; inset: -12px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--neon), var(--cyan), var(--neon));
  filter: blur(22px); opacity: 0.55;
  animation: spin 12s linear infinite;
  z-index: 1;
}
@keyframes spin { to { transform: rotate(360deg); } }

.scroll-indicator {
  position: absolute; bottom: 28px; left: 50%;
  transform: translateX(-50%);
  color: var(--neon);
  animation: bounce 2s ease-in-out infinite;
  font-size: 1.4rem;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* SECTIONS */
section { padding: 90px 0; }
section.hero { padding-top: 110px; }

.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  color: var(--text-0);
  margin-bottom: 44px;
  display: flex; align-items: center; gap: 14px;
  font-weight: 700; letter-spacing: -0.3px;
  position: relative;
}
.section-title::before { content: "//"; color: var(--neon); font-weight: 700; }
.section-title .title-icon {
  display: inline-flex;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(159, 239, 0, 0.10);
  border: 1px solid rgba(159, 239, 0, 0.30);
  color: var(--neon);
  align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.section-title:hover { animation: glitch 0.4s ease; }
@keyframes glitch {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 1px); text-shadow: 1px 0 var(--cyan), -1px 0 var(--pink); }
  40% { transform: translate(2px, -1px); }
  60% { transform: translate(-1px, 2px); text-shadow: -1px 0 var(--cyan), 1px 0 var(--pink); }
  80% { transform: translate(1px, 0); }
  100% { transform: translate(0); text-shadow: none; }
}

/* ABOUT */
.about-content { max-width: 880px; }
.about-text p { margin-bottom: 18px; font-size: 1.02rem; color: var(--text-1); }
.about-text strong { color: var(--neon); font-weight: 600; }
.about-highlights {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 14px; margin-top: 30px;
}
.highlight-item {
  min-height: 80px;
  display: flex; align-items: center; gap: 14px;
  padding: 14px 18px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--t);
}
.highlight-item:hover { border-color: var(--neon); transform: translateY(-2px); box-shadow: var(--glow-neon); }
.highlight-item i { color: var(--neon); font-size: 1.2rem; width: 28px; text-align: center; }
.highlight-item span { font-weight: 500; color: var(--text-0); font-size: 0.93rem; }
@media (max-width: 700px) {
  .about-highlights { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 420px) {
  .about-highlights { grid-template-columns: 1fr; }
}

/* SKILLS */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.skill-category {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: all var(--t);
  position: relative; overflow: hidden;
}
.skill-category::before {
  content: ""; position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon), transparent);
  opacity: 0; transition: opacity var(--t);
}
.skill-category:hover { border-color: rgba(159, 239, 0, 0.4); transform: translateY(-3px); }
.skill-category:hover::before { opacity: 1; }
.skill-category h3 {
  font-family: var(--font-mono); font-size: 1rem;
  color: var(--neon); margin-bottom: 18px;
  display: flex; align-items: center; gap: 10px;
}
.skill-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.skill-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 6px; font-size: 0.88rem;
}
.skill-name { color: var(--text-1); font-weight: 500; }
.skill-level {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.skill-level.advanced { background: rgba(159, 239, 0, 0.14); color: var(--neon); border: 1px solid rgba(159, 239, 0, 0.4); }
.skill-level.intermediate { background: rgba(0, 212, 255, 0.12); color: var(--cyan); border: 1px solid rgba(0, 212, 255, 0.35); }
.skill-level.beginner { background: rgba(255, 183, 0, 0.12); color: var(--amber); border: 1px solid rgba(255, 183, 0, 0.35); }

/* CTF */
.ctf-content { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.htb-profile, .ctf-events {
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.htb-header {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 24px; padding-bottom: 18px;
  border-bottom: 1px dashed var(--border);
}
.htb-logo { width: 40px; height: 40px; filter: drop-shadow(0 0 8px rgba(159, 239, 0, 0.4)); }
.htb-header h3 { font-family: var(--font-mono); color: var(--text-0); font-size: 1.15rem; }
.htb-username {
  margin-left: auto;
  font-family: var(--font-mono); font-size: 0.88rem;
  color: var(--neon);
  background: rgba(159, 239, 0, 0.1);
  padding: 4px 10px; border-radius: 999px;
  border: 1px solid rgba(159, 239, 0, 0.3);
}
.htb-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 24px; }
.stat-card {
  background: rgba(159, 239, 0, 0.04);
  border: 1px solid rgba(159, 239, 0, 0.18);
  border-radius: var(--radius-sm);
  padding: 16px 12px; text-align: center;
  transition: all var(--t);
}
.stat-card:hover { border-color: var(--neon); transform: translateY(-2px); }
.stat-icon { font-size: 1.3rem; color: var(--neon); margin-bottom: 6px; }
.stat-value { display: block; font-family: var(--font-mono); font-size: 1.4rem; color: var(--text-0); font-weight: 700; }
.stat-label { display: block; font-size: 0.73rem; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 2px; }
.htb-category, .htb-team { margin-top: 18px; }
.htb-category h4, .htb-team h4 {
  font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--text-3); text-transform: uppercase;
  letter-spacing: 0.6px; margin-bottom: 10px;
}
.category-badge, .team-badge {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  background: rgba(0, 212, 255, 0.05);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius-sm);
}
.category-badge i { color: var(--cyan); font-size: 1.1rem; }
.category-badge span:nth-of-type(1) { color: var(--text-0); font-weight: 600; }
.category-stats { margin-left: auto; font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-2); }
.team-icon {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--neon), var(--cyan));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 800; color: #0a0e14;
}
.team-info { display: flex; flex-direction: column; }
.team-name { color: var(--text-0); font-weight: 600; }
.team-role { font-size: 0.82rem; color: var(--amber); }
.team-role i { margin-right: 4px; }
.ctf-events h3 {
  font-family: var(--font-mono); color: var(--text-0);
  font-size: 1.05rem; margin-bottom: 20px;
  padding-bottom: 18px; border-bottom: 1px dashed var(--border);
}
.event-card {
  display: flex; gap: 16px; padding: 18px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.event-icon {
  width: 50px; height: 50px; flex-shrink: 0;
  background: rgba(255, 92, 92, 0.1);
  border: 1px solid rgba(255, 92, 92, 0.4);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--red); font-size: 1.4rem;
}
.event-info h4 { color: var(--text-0); font-size: 1rem; margin-bottom: 4px; }
.event-organizer { color: var(--text-3); font-size: 0.85rem; margin-bottom: 10px; }
.event-stats {
  display: flex; flex-wrap: wrap; gap: 14px;
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-2);
}
.event-stats i { color: var(--neon); margin-right: 4px; }

/* HTB ACADEMY */
.learning-intro {
  margin-bottom: 36px;
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.htb-academy-badge { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.htb-academy-badge img { width: 56px; height: 56px; filter: drop-shadow(0 0 8px rgba(159, 239, 0, 0.4)); }
.badge-info h3 { font-family: var(--font-mono); color: var(--text-0); font-size: 1.1rem; margin-bottom: 4px; }
.badge-info p { color: var(--text-2); font-size: 0.92rem; margin-bottom: 10px; }
.module-progress {
  display: flex; align-items: center; gap: 14px;
  width: 100%; margin-top: 8px;
}
.progress-track {
  flex: 1; height: 8px;
  background: rgba(159, 239, 0, 0.08);
  border-radius: 999px; overflow: hidden;
  border: 1px solid rgba(159, 239, 0, 0.2);
  min-width: 200px;
}
.progress-fill {
  height: 100%;
  width: 12.03%;
  background: linear-gradient(90deg, var(--neon), var(--cyan));
  border-radius: 999px;
  box-shadow: 0 0 14px rgba(159, 239, 0, 0.6);
  transition: width 1.5s ease;
}
.progress-text {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--neon);
  font-weight: 600;
  white-space: nowrap;
}

.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 18px;
}
.htb-badge {
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 16px 18px;
  text-align: center;
  transition: all var(--t);
  position: relative; overflow: hidden;
}
.htb-badge::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(159, 239, 0, 0.08), transparent 70%);
  opacity: 0; transition: opacity var(--t);
  pointer-events: none;
}
.htb-badge:hover {
  border-color: rgba(159, 239, 0, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(159, 239, 0, 0.15) inset;
}
.htb-badge:hover::after { opacity: 1; }

.badge-circle {
  width: 92px; height: 92px;
  margin: 0 auto 14px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--badge-bg, linear-gradient(135deg, #6e76e0, #b5e6ff));
  position: relative;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}
.badge-circle::before {
  content: "";
  position: absolute; inset: -3px;
  border-radius: 50%;
  border: 2px solid rgba(159, 239, 0, 0.7);
  box-shadow: 0 0 14px rgba(159, 239, 0, 0.5);
}
.badge-circle i {
  position: relative; z-index: 2;
  font-size: 2rem; color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.4));
}
.badge-check {
  position: absolute;
  bottom: -2px; right: 8px;
  width: 22px; height: 22px;
  background: var(--neon);
  border: 2px solid var(--bg-0);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #0a0e14; font-size: 0.7rem; font-weight: 800;
  z-index: 3;
}
.badge-title {
  font-family: var(--font-mono);
  color: var(--text-0);
  font-size: 0.95rem; font-weight: 700;
  margin-bottom: 6px; line-height: 1.3;
}
.badge-module { font-size: 0.8rem; color: var(--text-2); line-height: 1.4; }

.htb-badge.v1 { --badge-bg: linear-gradient(135deg, #5b6dee, #9eb4ff); }
.htb-badge.v2 { --badge-bg: linear-gradient(135deg, #00d4a8, #c0f5e3); }
.htb-badge.v3 { --badge-bg: linear-gradient(135deg, #ff7b54, #ffd6c1); }
.htb-badge.v4 { --badge-bg: linear-gradient(135deg, #b14eff, #e7c7ff); }
.htb-badge.v5 { --badge-bg: linear-gradient(135deg, #ffb700, #ffe9a8); }
.htb-badge.v6 { --badge-bg: linear-gradient(135deg, #00d4ff, #c1f3ff); }
.htb-badge.v7 { --badge-bg: linear-gradient(135deg, #ff3e88, #ffc1d8); }
.htb-badge.v8 { --badge-bg: linear-gradient(135deg, #00ff9c, #c4ffe6); }

/* CERTIFICATIONS */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 22px;
}
.cert-card {
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--t);
  display: flex; flex-direction: column;
}
.cert-card:hover {
  border-color: rgba(159, 239, 0, 0.45);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.5);
}
.cert-image {
  position: relative; background: #0d1218;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  cursor: zoom-in;
}
.cert-image img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.5s; }
.cert-card:hover .cert-image img { transform: scale(1.04); }
.cert-overlay {
  position: absolute; inset: 0;
  background: rgba(7, 9, 13, 0.7);
  display: flex; align-items: center; justify-content: center;
  color: var(--neon);
  font-size: 1.8rem; opacity: 0;
  transition: opacity var(--t);
}
.cert-image:hover .cert-overlay { opacity: 1; }

.cert-badge {
  width: 100%; height: 200px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(159, 239, 0, 0.04));
  color: var(--cyan);
  font-size: 4rem;
  border-bottom: 1px solid var(--border);
}
.cert-info { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.cert-info h3 {
  font-family: var(--font-mono);
  color: var(--text-0);
  font-size: 1rem;
  margin-bottom: 12px;
  line-height: 1.4;
}
.cert-issuer, .cert-date { font-size: 0.86rem; color: var(--text-2); margin-bottom: 6px; }
.cert-issuer i, .cert-date i { color: var(--cyan); margin-right: 6px; width: 14px; }
.cert-status {
  margin-top: auto;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 11px; border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem; font-weight: 600;
  align-self: flex-start;
}
.cert-status.obtained { background: rgba(159, 239, 0, 0.12); color: var(--neon); border: 1px solid rgba(159, 239, 0, 0.4); }
.cert-status.in-progress { background: rgba(255, 183, 0, 0.12); color: var(--amber); border: 1px solid rgba(255, 183, 0, 0.4); }
.cert-actions { margin-top: 14px; display: flex; gap: 10px; }
.cert-action {
  flex: 1;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 12px;
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  color: var(--text-1);
  transition: all var(--t);
}
.cert-action:hover {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(159, 239, 0, 0.06);
}

/* ACHIEVEMENTS */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 22px;
}
.achievement-card {
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--t);
}
.achievement-card:hover { border-color: rgba(255, 183, 0, 0.4); transform: translateY(-4px); }
.achievement-image { position: relative; cursor: zoom-in; background: #0d1218; }
.achievement-image img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.5s; }
.achievement-card:hover .achievement-image img { transform: scale(1.04); }
.achievement-overlay {
  position: absolute; inset: 0;
  background: rgba(7, 9, 13, 0.7);
  display: flex; align-items: center; justify-content: center;
  color: var(--amber); font-size: 1.8rem;
  opacity: 0; transition: opacity var(--t);
}
.achievement-image:hover .achievement-overlay { opacity: 1; }
.achievement-info { padding: 22px; }
.achievement-info h3 {
  font-family: var(--font-mono);
  color: var(--text-0);
  font-size: 1rem; margin-bottom: 10px;
  line-height: 1.4;
  display: flex; align-items: center; gap: 10px;
}
.achievement-info p { color: var(--text-2); font-size: 0.9rem; line-height: 1.65; }
.gold { color: #ffd24a; }
.silver { color: #d3d6db; }

/* CONTACT */
.contact-content { max-width: 720px; margin: 0 auto; text-align: center; }
.contact-intro { font-size: 1.05rem; color: var(--text-1); margin-bottom: 36px; line-height: 1.75; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.contact-link {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 22px;
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: left;
  transition: all var(--t);
}
.contact-link:hover { transform: translateY(-3px); border-color: var(--neon); box-shadow: var(--glow-neon); }
.contact-link i {
  width: 42px; height: 42px; flex-shrink: 0;
  border-radius: 10px;
  background: rgba(159, 239, 0, 0.1);
  border: 1px solid rgba(159, 239, 0, 0.3);
  display: flex; align-items: center; justify-content: center;
  color: var(--neon); font-size: 1.1rem;
}
.contact-link.linkedin i { background: rgba(0, 212, 255, 0.1); border-color: rgba(0, 212, 255, 0.3); color: var(--cyan); }
.contact-link.github i { background: rgba(195, 195, 195, 0.08); border-color: rgba(195, 195, 195, 0.25); color: #e6e6e6; }
.contact-link.email i { color: var(--amber); background: rgba(255, 183, 0, 0.08); border-color: rgba(255, 183, 0, 0.3); }
.contact-link.phone i { color: var(--pink); background: rgba(255, 62, 136, 0.08); border-color: rgba(255, 62, 136, 0.3); }
.contact-link-label { display: flex; flex-direction: column; min-width: 0; }
.contact-link-label .ctype {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.contact-link-label .cval {
  color: var(--text-0);
  font-weight: 500; font-size: 0.93rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-1);
  padding: 40px 0 32px;
  margin-top: 30px;
}
.footer-content { text-align: center; }
.footer-logo {
  font-family: var(--font-mono);
  font-weight: 700; font-size: 1.2rem;
  color: var(--text-0); margin-bottom: 10px;
}
.footer-text { font-family: var(--font-mono); color: var(--text-2); font-size: 0.9rem; margin-bottom: 18px; }
.footer-social { display: flex; justify-content: center; gap: 14px; margin-bottom: 18px; }
.footer-social a {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-1);
  transition: all var(--t);
}
.footer-social a:hover { background: rgba(159, 239, 0, 0.08); border-color: var(--neon); color: var(--neon); transform: translateY(-2px); }
.footer-copyright { font-family: var(--font-mono); color: var(--text-3); font-size: 0.82rem; }

/* MODAL */
.modal {
  display: none;
  position: fixed; inset: 0;
  z-index: 1000;
  background: rgba(7, 9, 13, 0.92);
  padding: 60px 24px;
  overflow: auto;
  backdrop-filter: blur(6px);
}
.modal.active { display: flex; align-items: center; justify-content: center; flex-direction: column; }
.modal-close {
  position: absolute; top: 20px; right: 30px;
  font-size: 2.2rem; color: var(--neon);
  cursor: pointer;
  font-family: var(--font-mono);
  transition: var(--t);
}
.modal-close:hover { color: var(--cyan); transform: rotate(90deg); }
.modal-content {
  max-width: 90%; max-height: 80vh;
  border: 2px solid var(--neon);
  border-radius: var(--radius);
  box-shadow: 0 0 40px rgba(159, 239, 0, 0.4);
}
.modal-caption {
  margin-top: 18px;
  font-family: var(--font-mono);
  color: var(--text-0);
  font-size: 0.95rem;
  text-align: center;
}

/* REVEAL */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.65s ease, transform 0.65s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* RESPONSIVE */
@media (max-width: 980px) {
  .hero-container { grid-template-columns: 1fr; gap: 40px; }
  .avatar-container { width: 220px; height: 220px; }
  .ctf-content { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 60px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(7, 9, 13, 0.97);
    padding: 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-150%);
    transition: transform var(--t);
  }
  .nav-menu.active { transform: translateY(0); }
  .hamburger { display: flex; }
  section { padding: 70px 0; }
  .section-title { font-size: 1.45rem; margin-bottom: 32px; }
  .htb-stats { grid-template-columns: repeat(3, 1fr); }
  .badges-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
  .badge-circle { width: 80px; height: 80px; }
  .terminal-body { padding: 18px; }
}
@media (max-width: 480px) {
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .badges-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .badge-circle { width: 70px; height: 70px; }
  .badge-circle i { font-size: 1.5rem; }
}

/* ===================== PROJECTS ===================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(440px, 1fr));
  gap: 24px;
}
.project-card {
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 26px 22px;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.project-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--cyan));
  opacity: 0;
  transition: opacity var(--t);
}
.project-card:hover {
  border-color: rgba(159, 239, 0, 0.45);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}
.project-card:hover::before { opacity: 1; }

.project-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border);
}
.project-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(159, 239, 0, 0.10);
  border: 1px solid rgba(159, 239, 0, 0.4);
  border-radius: 12px;
  color: var(--neon);
  font-size: 1.4rem;
  flex-shrink: 0;
}
.project-icon.alt {
  background: rgba(0, 212, 255, 0.10);
  border-color: rgba(0, 212, 255, 0.4);
  color: var(--cyan);
}
.project-meta {
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}
.project-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.project-tag.security {
  background: rgba(255, 92, 92, 0.12);
  color: var(--red);
  border: 1px solid rgba(255, 92, 92, 0.4);
}
.project-tag.award {
  background: rgba(255, 215, 74, 0.12);
  color: #ffd24a;
  border: 1px solid rgba(255, 215, 74, 0.4);
}
.project-year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-3);
}

.project-title {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-0);
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.4;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}
.tech-chip {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(0, 212, 255, 0.07);
  color: var(--cyan);
  border: 1px solid rgba(0, 212, 255, 0.25);
  font-weight: 500;
}

.project-role {
  font-size: 0.9rem;
  color: var(--text-1);
  margin-bottom: 14px;
  padding: 10px 14px;
  background: rgba(255, 215, 74, 0.06);
  border-left: 3px solid #ffd24a;
  border-radius: 6px;
}
.project-role i { color: #ffd24a; margin-right: 6px; }
.project-role strong { color: var(--text-0); }

.project-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
  padding: 0;
}
.project-points li {
  font-size: 0.92rem;
  color: var(--text-1);
  line-height: 1.65;
  padding-left: 22px;
  position: relative;
}
.project-points li::before {
  content: ">";
  position: absolute;
  left: 0; top: 0;
  color: var(--neon);
  font-family: var(--font-mono);
  font-weight: 700;
}
.project-points strong { color: var(--neon); font-weight: 600; }
.project-points code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: rgba(0, 212, 255, 0.08);
  color: var(--cyan);
  padding: 1px 6px;
  border-radius: 4px;
}

.project-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.pstat {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.pstat-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--neon);
}
.pstat-label {
  font-size: 0.72rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.project-actions {
  margin-top: auto;
  display: flex;
  gap: 10px;
}
.project-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  color: var(--text-0);
  background: rgba(255, 255, 255, 0.02);
  transition: all var(--t);
}
.project-action:hover {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(159, 239, 0, 0.08);
  box-shadow: var(--glow-neon);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .projects-grid { grid-template-columns: 1fr; }
  .project-card { padding: 22px 18px 18px; }
  .project-stats { grid-template-columns: repeat(3, 1fr); gap: 6px; padding: 10px; }
  .pstat-value { font-size: 1rem; }
}

/* =========================================================
   ADDITIONS — AI project tag, Hands-on Labs, cert extras
   ========================================================= */

.project-tag.ai {
  background: rgba(177, 78, 255, 0.12);
  color: #c88bff;
  border: 1px solid rgba(177, 78, 255, 0.4);
}
.event-card + .event-card { margin-top: 16px; }
.event-info { min-width: 0; }
.event-info .course-link { margin-top: 12px; }
.project-tag.in-progress {
  background: rgba(255, 183, 0, 0.12);
  color: var(--amber);
  border: 1px solid rgba(255, 183, 0, 0.4);
}

/* HANDS-ON LABS */
.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 22px;
}
.lab-card {
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.lab-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transition: opacity var(--t);
}
.lab-card:hover {
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.5);
}
.lab-card:hover::before { opacity: 1; }

.lab-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border);
  flex-wrap: wrap;
}
.lab-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 92, 92, 0.10);
  border: 1px solid rgba(255, 92, 92, 0.4);
  border-radius: 12px;
  color: var(--red);
  font-size: 1.3rem;
  flex-shrink: 0;
}
.lab-icon.alt {
  background: rgba(159, 239, 0, 0.10);
  border-color: rgba(159, 239, 0, 0.4);
  color: var(--neon);
}
.lab-header h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-0);
  font-weight: 700;
  line-height: 1.35;
}
.lab-sub {
  font-size: 0.83rem;
  color: var(--text-3);
  font-family: var(--font-mono);
  margin-top: 2px;
}
.lab-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(0, 212, 255, 0.35);
  white-space: nowrap;
}

.lab-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
  padding: 0;
}
.lab-points li {
  font-size: 0.92rem;
  color: var(--text-2);
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}
.lab-points li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 700;
}
.lab-points strong { color: var(--text-0); }

.lab-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}
.lab-card .project-action { margin-top: auto; align-self: flex-start; }

/* CERT EXTRAS */
.cert-badge.google {
  background: linear-gradient(135deg, rgba(66, 133, 244, 0.10), rgba(234, 67, 53, 0.06));
  color: #4285f4;
}
.cert-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 12px 0 14px;
}
.cert-progress .progress-track { min-width: 0; }
.cert-progress .progress-text { font-size: 0.82rem; }

@media (max-width: 768px) {
  .labs-grid { grid-template-columns: 1fr; }
  .lab-card { padding: 22px 18px; }
  .lab-count { margin-left: 0; }
}

/* GOOGLE CYBERSECURITY CERT — course breakdown card */
.cert-card.google-cert {
  grid-column: 1 / -1;
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
}
.cert-card.google-cert:hover { transform: none; border-color: rgba(66, 133, 244, 0.45); }
.google-cert .cert-image img { height: auto; max-height: 420px; object-fit: contain; }
.google-cert .cert-actions { flex-wrap: wrap; }

.gcert-head {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.cert-badge.inline {
  width: 56px; height: 56px;
  font-size: 1.7rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  flex-shrink: 0;
}
.gcert-head h3 { margin-bottom: 4px; }
.gcert-head .cert-status { margin-top: 0; margin-left: auto; align-self: center; }

.google-cert .cert-progress { margin: 16px 0 20px; }

.course-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0;
  margin: 0;
}
.course-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  transition: all var(--t);
  flex-wrap: wrap;
}
.course-item.done { border-left-color: var(--neon); }
.course-item.pending { border-left-color: var(--text-3); opacity: 0.62; }
.course-item.done:hover {
  background: rgba(159, 239, 0, 0.05);
  border-color: rgba(159, 239, 0, 0.35);
  border-left-color: var(--neon);
}
.course-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-3);
  min-width: 40px;
  flex-shrink: 0;
}
.course-item.done .course-num { color: var(--neon); }
.course-body { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 180px; }
.course-name {
  font-size: 0.92rem;
  color: var(--text-0);
  font-weight: 500;
  line-height: 1.4;
}
.course-item.pending .course-name { color: var(--text-2); font-weight: 400; }
.course-date {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-3);
}
.course-date i { margin-right: 5px; }
.course-item.done .course-date i { color: var(--neon); }

.course-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  color: var(--text-1);
  transition: all var(--t);
  flex-shrink: 0;
}
.course-link:hover {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(159, 239, 0, 0.07);
}

@media (max-width: 600px) {
  .gcert-head .cert-status { margin-left: 0; }
  .course-item { gap: 10px; padding: 10px 12px; }
  .course-link { width: 100%; justify-content: center; }
}

/* Text-based project stat values (shorter font so they fit the 3-col grid) */
.pstat-value.pstat-text {
  font-size: 0.92rem;
  line-height: 1.25;
}
@media (max-width: 640px) {
  .pstat-value.pstat-text { font-size: 0.82rem; }
}

/* THESIS TAG + 4-stat project grid */
.project-tag.thesis {
  background: rgba(159, 239, 0, 0.12);
  color: var(--neon);
  border: 1px solid rgba(159, 239, 0, 0.45);
}
.project-stats:has(> .pstat:nth-child(4)) {
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 900px) {
  .project-stats:has(> .pstat:nth-child(4)) {
    grid-template-columns: repeat(4, 1fr);
  }
}