/*
  ==========================
  Cybersecurity Portfolio CSS
  ==========================
  - No frameworks
  - Grid + Flexbox
  - Smooth interactions
  - Theme support (dark/light)
*/

:root{
  --bg: #070A12;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-2: rgba(255, 255, 255, 0.09);
  --text: rgba(255, 255, 255, 0.88);
  --muted: rgba(255, 255, 255, 0.65);
  --line: rgba(255, 255, 255, 0.14);

  --accent: #6EE7FF;
  --accent-2: #A78BFA;
  --ok: #22c55e;
  --warn: #f59e0b;
  --bad: #ef4444;

  --shadow: 0 16px 50px rgba(0,0,0,0.35);
  --radius: 18px;
  --radius-sm: 12px;

  --max: 1120px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;

  --ease: cubic-bezier(.2,.9,.2,1);

  /* Motion: tune these if you want slower/faster */
  --reveal-y: 18px;
  --reveal-dur: 650ms;
}

[data-theme="light"]{
  --bg: #f7f8ff;
  --panel: rgba(0, 0, 0, 0.04);
  --panel-2: rgba(0, 0, 0, 0.07);
  --text: rgba(0, 0, 0, 0.86);
  --muted: rgba(0, 0, 0, 0.62);
  --line: rgba(0, 0, 0, 0.12);
  --shadow: 0 14px 44px rgba(0,0,0,0.12);
}

/* Base */
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% -10%, rgba(110,231,255,0.18), transparent 55%),
              radial-gradient(1200px 600px at 90% 10%, rgba(167,139,250,0.18), transparent 55%),
              var(--bg);
  overflow-x: hidden;
}

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; height: auto; }
code{ font-family: var(--mono); }

.container{
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.section{
  padding: 84px 0;
  position: relative;
}

.section-head{
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.section-head h2{
  margin: 0;
  font-size: clamp(1.55rem, 2.4vw, 2.2rem);
  letter-spacing: -0.02em;
}

.section-subtitle{
  margin: 0;
  color: var(--muted);
  max-width: 72ch;
}

/* Background decorations */
.bg-grid{
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(600px 400px at 40% 15%, black 45%, transparent 75%);
  z-index: -2;
}
[data-theme="light"] .bg-grid{
  opacity: 0.08;
  background-image:
    linear-gradient(to right, rgba(0,0,0,0.16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,0.16) 1px, transparent 1px);
}

.bg-glow{
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -3;
  background:
    radial-gradient(700px 500px at 70% 70%, rgba(110,231,255,0.10), transparent 60%),
    radial-gradient(600px 450px at 25% 80%, rgba(167,139,250,0.12), transparent 60%);
}

/* Skip link */
.skip-link{
  position: absolute;
  left: -999px;
  top: 12px;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  z-index: 9999;
}
.skip-link:focus{ left: 12px; }

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 12, 22, 0.55);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
[data-theme="light"] .site-header{
  background: rgba(247, 248, 255, 0.65);
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 14px;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand-mark{
  width: 16px;
  height: 16px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 24px rgba(110,231,255,0.18);
}
.brand-text .dot{ color: var(--accent); }

.nav-toggle{
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 12px;
  width: 44px;
  height: 44px;
  cursor: pointer;
}
.hamburger{
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  margin: 0 auto;
  position: relative;
}
.hamburger::before,
.hamburger::after{
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 220ms var(--ease), top 220ms var(--ease), opacity 220ms var(--ease);
}
.hamburger::before{ top: -6px; }
.hamburger::after{ top: 6px; }

.nav-menu{
  display: flex;
  align-items: center;
  gap: 18px;
}
.nav-links{
  display: flex;
  list-style: none;
  gap: 14px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.nav-link{
  display: inline-flex;
  padding: 10px 10px;
  border-radius: 12px;
  color: var(--muted);
  transition: background 200ms var(--ease), color 200ms var(--ease), transform 200ms var(--ease);
}
.nav-link:hover{
  background: var(--panel);
  color: var(--text);
  transform: translateY(-1px);
}
.nav-link.active{
  background: linear-gradient(135deg, rgba(110,231,255,0.15), rgba(167,139,250,0.15));
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text);
}

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

.icon-btn{
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: transform 200ms var(--ease), background 200ms var(--ease);
}
.icon-btn:hover{ transform: translateY(-1px); background: var(--panel-2); }

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.16);
  background: linear-gradient(135deg, rgba(110,231,255,0.22), rgba(167,139,250,0.18));
  color: var(--text);
  font-weight: 650;
  box-shadow: var(--shadow);
  transition: transform 200ms var(--ease), filter 200ms var(--ease), background 200ms var(--ease);
}
.btn:hover{
  transform: translateY(-1px);
  filter: brightness(1.06);
}
.btn:active{ transform: translateY(0px); }

.btn-ghost{
  background: transparent;
  box-shadow: none;
  border: 1px solid var(--line);
}
.btn-ghost:hover{
  background: var(--panel);
  filter: none;
}

/* Hero */
.hero{
  padding-top: 92px;
  padding-bottom: 72px;
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 20px;
  align-items: start;
}
.kicker{
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.02em;
  margin: 0 0 10px;
}
.hero-title{
  margin: 0 0 12px;
  font-size: clamp(2rem, 4.2vw, 3.3rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.hero-subtitle{
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 66ch;
}
.accent{
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.muted{ color: var(--muted); }

.hero-cta{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.hero-badges{
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.pill{
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-card{
  display: grid;
  gap: 14px;
}

.terminal{
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.25);
  box-shadow: var(--shadow);
  overflow: hidden;
}
[data-theme="light"] .terminal{ background: rgba(255,255,255,0.5); }

.terminal-bar{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
.dot{
  width: 10px;
  height: 10px;
  border-radius: 999px;
}
.dot.red{ background: #ff5f57; }
.dot.yellow{ background: #febc2e; }
.dot.green{ background: #28c840; }
.terminal-title{
  margin-left: 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.9rem;
}

.terminal-body{
  padding: 12px 14px;
  font-family: var(--mono);
  color: rgba(255,255,255,0.82);
}
[data-theme="light"] .terminal-body{ color: rgba(0,0,0,0.78); }

.prompt{ color: var(--accent); }
.terminal-output{ color: var(--muted); margin: 6px 0 12px; }
.terminal-list{ margin: 6px 0 0 18px; color: var(--muted); }

.mini-stats{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.stat{
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 12px;
}
.stat-num{
  margin: 0;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.stat-label{ margin: 2px 0 0; color: var(--muted); font-size: 0.92rem; }

.scroll-hint{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
}
.mouse{
  width: 18px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid var(--line);
  position: relative;
}
.mouse::after{
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: var(--accent);
  position: absolute;
  left: 50%;
  top: 7px;
  transform: translateX(-50%);
  animation: wheel 1400ms var(--ease) infinite;
}
@keyframes wheel{
  0%{ transform: translate(-50%, 0); opacity: 1; }
  70%{ transform: translate(-50%, 10px); opacity: 0.25; }
  100%{ transform: translate(-50%, 10px); opacity: 0; }
}

/* Cards / Layout helpers */
.card{
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.12);
  background: var(--panel);
  padding: 18px;
  box-shadow: var(--shadow);
}
.card h3{ margin: 0 0 10px; letter-spacing: -0.02em; }
.card p{ margin: 0 0 10px; color: var(--muted); }
.card p:last-child{ margin-bottom: 0; }

.grid{
  display: grid;
  gap: 14px;
}
.cards-2{ grid-template-columns: repeat(2, 1fr); }
.cards-3{ grid-template-columns: repeat(3, 1fr); }

.about-grid{
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 14px;
  align-items: start;
}

.info-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.label{ color: var(--text); font-weight: 650; }
.note{
  color: var(--muted);
  border-left: 2px solid rgba(110,231,255,0.38);
  padding-left: 10px;
}

.social-row{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.social{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  transition: transform 200ms var(--ease), background 200ms var(--ease), color 200ms var(--ease);
}
.social:hover{
  transform: translateY(-1px);
  background: var(--panel-2);
  color: var(--text);
}

/* Chips */
.chip-list{
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip{
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.14);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--muted);
}
[data-theme="light"] .chip{ background: rgba(255,255,255,0.5); }

/* Skills */
.skills-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 14px;
}

.skill{ margin-top: 14px; }
.skill-top{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.95rem;
}
.bar{
  margin-top: 8px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.10);
  overflow: hidden;
}
.bar-fill{
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 900ms var(--ease);
}

/* Stack */
.stack-grid{
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.stack-item{
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(0,0,0,0.12);
  padding: 12px;
  display: grid;
  gap: 6px;
  place-items: start;
  transition: transform 200ms var(--ease), background 200ms var(--ease);
}
.stack-item:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.06); }
.stack-icon{
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
  background: linear-gradient(135deg, rgba(110,231,255,0.18), rgba(167,139,250,0.16));
  border: 1px solid rgba(255,255,255,0.14);
}
.stack-name{ color: var(--muted); font-family: var(--mono); }

/* Timeline */
.timeline{
  display: grid;
  gap: 12px;
  position: relative;
  margin-top: 10px;
}
.timeline::before{
  content:"";
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: rgba(255,255,255,0.10);
}
.timeline-item{
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  align-items: start;
  position: relative;
}
.t-dot{
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  margin-top: 18px;
  margin-left: 7px;
  box-shadow: 0 10px 30px rgba(110,231,255,0.20);
}
.t-card{
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.12);
  background: var(--panel);
  padding: 16px;
  box-shadow: var(--shadow);
}
.t-card h3{ margin: 0 0 8px; }
.t-card p{ margin: 0; color: var(--muted); }

/* Projects */
.project-links{
  margin-top: 14px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.link{
  color: var(--accent);
  font-weight: 650;
  font-family: var(--mono);
  letter-spacing: 0.01em;
  border-bottom: 1px dashed rgba(110,231,255,0.5);
  padding-bottom: 2px;
}
.link:hover{ color: var(--text); border-bottom-color: rgba(255,255,255,0.35); }

/* Experience bullets */
.bullets{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 8px;
}

/* Testimonials */
.testimonial .quote{
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--text);
}
.testimonial .who{
  margin: 0 0 14px;
  color: var(--muted);
  font-family: var(--mono);
}
.testimonial-actions{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* FAQ */
.faq{ display: grid; gap: 8px; }
.faq-q{
  text-align: left;
  padding: 14px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.12);
  color: var(--text);
  cursor: pointer;
  font-weight: 650;
}
.faq-q:hover{ background: rgba(255,255,255,0.06); }
.faq-a{
  padding: 0 14px 14px;
  color: var(--muted);
}

/* Resume */
.resume-card{
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

/* Contact */
.contact-grid{
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 14px;
  align-items: start;
}
.field{
  display: grid;
  gap: 8px;
  margin-top: 12px;
}
.field span{ color: var(--muted); font-family: var(--mono); font-size: 0.95rem; }
input, textarea{
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(0,0,0,0.16);
  color: var(--text);
  padding: 12px 12px;
  outline: none;
  font: inherit;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease), background 200ms var(--ease);
}
[data-theme="light"] input,
[data-theme="light"] textarea{
  background: rgba(255,255,255,0.6);
  border-color: rgba(0,0,0,0.14);
}
input:focus, textarea:focus{
  border-color: rgba(110,231,255,0.55);
}
.error{
  color: rgba(239, 68, 68, 0.95);
  min-height: 18px;
}
.form-status{
  margin: 12px 0 0;
  color: var(--muted);
  font-family: var(--mono);
}

.callout{
  margin-top: 14px;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(110,231,255,0.20);
  background: linear-gradient(135deg, rgba(110,231,255,0.10), rgba(167,139,250,0.08));
}
.callout h4{ margin: 0 0 8px; }

/* Footer */
.footer{
  padding: 28px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-row{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
}

/* Back to top button */
.to-top{
  position: fixed;
  right: 14px;
  bottom: 14px;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow);
  transform: translateY(14px);
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}
.to-top.show{
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Reveal animation (JS adds .in-view) */
.reveal{
  opacity: 0;
  transform: translateY(var(--reveal-y));
  transition: opacity var(--reveal-dur) var(--ease), transform var(--reveal-dur) var(--ease);
}
.reveal.in-view{
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .about-grid{ grid-template-columns: 1fr; }
  .skills-grid{ grid-template-columns: 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
  .cards-3{ grid-template-columns: repeat(2, 1fr); }
  .stack-grid{ grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 720px){
  .nav-toggle{ display: inline-flex; align-items: center; justify-content: center; }

  .nav-menu{
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: min(var(--max), calc(100% - 1.2rem));
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(10, 12, 22, 0.75);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
    padding: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  [data-theme="light"] .nav-menu{ background: rgba(247, 248, 255, 0.82); }

  .nav-menu.open{ display: flex; }
  .nav-links{ flex-direction: column; gap: 6px; }
  .nav-link{ padding: 12px; }
  .nav-actions{ justify-content: space-between; }

  .cards-2, .cards-3{ grid-template-columns: 1fr; }
  .stack-grid{ grid-template-columns: repeat(2, 1fr); }
  .resume-card{ flex-direction: column; align-items: stretch; }
}

/* Reduced motion support: turn off non-essential animations if user prefers reduced motion. */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{
    animation: none !important;
    transition: none !important;
  }
  .reveal{ opacity: 1; transform: none; }
}