/* ============================================================
   ARSALAN FAREED ABID — PORTFOLIO
   Premium Cyber Security Portfolio Stylesheet
   ============================================================ */

/* ============================================================
   1. VARIABLES
   ============================================================ */
:root {
  /* Colours — Green & White cyber theme */
  --clr-bg:            #030a04;
  --clr-bg-alt:        #060e08;
  --clr-bg-card:       rgba(6, 16, 8, 0.88);
  --clr-primary:       #00e676;
  --clr-primary-dim:   rgba(0, 230, 118, 0.1);
  --clr-primary-glow:  rgba(0, 230, 118, 0.22);
  --clr-purple:        #39d353;
  --clr-purple-dim:    rgba(57, 211, 83, 0.1);
  --clr-green:         #00e676;
  --clr-green-dim:     rgba(0, 230, 118, 0.1);
  --clr-gold:          #f59e0b;
  --clr-text:          #f0fff4;
  --clr-text-secondary:#a7f3c4;
  --clr-text-muted:    #3d6b4f;
  --clr-border:        rgba(0, 230, 118, 0.1);
  --clr-border-hover:  rgba(0, 230, 118, 0.45);

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Radius */
  --r-sm:   6px;
  --r-md:   12px;
  --r-lg:   20px;
  --r-xl:   28px;
  --r-full: 9999px;

  /* Shadows */
  --sh-sm:      0 2px 12px rgba(0, 0, 0, 0.4);
  --sh-md:      0 8px 32px rgba(0, 0, 0, 0.5);
  --sh-lg:      0 20px 60px rgba(0, 0, 0, 0.6);
  --sh-primary: 0 0 40px rgba(0, 230, 118, 0.14);
  --sh-primary-strong: 0 0 60px rgba(0, 230, 118, 0.28);

  /* Transitions */
  --t-fast:   0.15s ease;
  --t-normal: 0.3s ease;
  --t-slow:   0.6s ease;

  /* Layout */
  --max-w:    1200px;
  --nav-h:    72px;
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a       { color: inherit; text-decoration: none; }
ul, ol  { list-style: none; }
img     { max-width: 100%; display: block; }
button  { font-family: inherit; cursor: pointer; }

/* Custom scrollbar */
::-webkit-scrollbar              { width: 6px; }
::-webkit-scrollbar-track        { background: var(--clr-bg); }
::-webkit-scrollbar-thumb        { background: rgba(0, 230, 118, 0.25); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover  { background: rgba(0, 230, 118, 0.5); }

/* Selection */
::selection { background: rgba(0, 230, 118, 0.18); color: var(--clr-primary); }

/* ============================================================
   3. UTILITIES
   ============================================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.text-accent    { color: var(--clr-primary); }
.text-gradient  {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   4. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 30px;
  border-radius: var(--r-full);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--t-normal), box-shadow var(--t-normal), background var(--t-normal);
  border: 2px solid transparent;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}

.btn--primary {
  background: linear-gradient(135deg, var(--clr-primary), #00b85c);
  color: #030a04;
  border-color: var(--clr-primary);
  box-shadow: 0 0 24px var(--clr-primary-dim);
}
.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 48px var(--clr-primary-glow), 0 10px 24px rgba(0,0,0,0.4);
}
.btn--primary:active { transform: translateY(-1px); }

.btn--outline {
  background: transparent;
  color: var(--clr-primary);
  border-color: rgba(0, 212, 255, 0.45);
}
.btn--outline:hover {
  background: var(--clr-primary-dim);
  border-color: var(--clr-primary);
  transform: translateY(-3px);
  box-shadow: 0 0 24px var(--clr-primary-dim);
}
.btn--outline:active { transform: translateY(-1px); }

.btn--sm   { padding: 9px 22px; font-size: 0.85rem; }
.btn--full { width: 100%; justify-content: center; }

/* ============================================================
   5. SECTION COMMON
   ============================================================ */
.section { padding: 104px 0; position: relative; }

.section:nth-child(even) { background: var(--clr-bg-alt); }

.section__header {
  text-align: center;
  margin-bottom: 68px;
}

.section__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--clr-primary);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 5px 18px;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-full);
  background: var(--clr-primary-dim);
}

.section__title {
  font-size: clamp(2rem, 4.5vw, 2.9rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.section__subtitle {
  margin-top: 16px;
  color: var(--clr-text-secondary);
  font-size: 1.02rem;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.75;
}

/* ============================================================
   6. SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   7. NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--t-normal), box-shadow var(--t-normal), backdrop-filter var(--t-normal);
}

.nav.scrolled {
  background: rgba(5, 11, 20, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--clr-border), 0 4px 24px rgba(0,0,0,0.4);
}

.nav__container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: opacity var(--t-fast);
}
.nav__logo:hover          { opacity: 0.8; }
.nav__logo-bracket        { color: var(--clr-primary); }
.nav__logo-name           { color: var(--clr-text); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.nav__link {
  padding: 7px 14px;
  border-radius: var(--r-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text-secondary);
  transition: color var(--t-fast), background var(--t-fast);
}
.nav__link:hover, .nav__link.active {
  color: var(--clr-primary);
  background: var(--clr-primary-dim);
}

.nav__cta { flex-shrink: 0; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
  flex-shrink: 0;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--t-normal), opacity var(--t-normal);
  pointer-events: none;
}
.nav__toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.active span:nth-child(2) { opacity: 0; }
.nav__toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   8. HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero__grid-overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0, 230, 118, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 230, 118, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 820px;
  animation: heroFadeIn 0.9s ease both;
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Badge */
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 20px;
  background: rgba(6, 214, 160, 0.1);
  border: 1px solid rgba(6, 214, 160, 0.35);
  border-radius: var(--r-full);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--clr-green);
  margin-bottom: 28px;
  animation: heroFadeIn 0.7s ease 0.1s both;
}
.hero__badge-dot {
  width: 8px; height: 8px;
  background: var(--clr-green);
  border-radius: 50%;
  animation: pulse 2.2s infinite;
}

/* Terminal line */
.hero__terminal {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-bottom: 14px;
  animation: heroFadeIn 0.7s ease 0.2s both;
}
.hero__terminal-comment { color: #4a6a6a; }

/* Name */
.hero__name {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 22px;
  animation: heroFadeIn 0.7s ease 0.3s both;
}
.hero__name-accent {
  display: block;
  color: var(--clr-primary);
  text-shadow: 0 0 60px rgba(0, 230, 118, 0.4);
}

/* Typing subtitle */
.hero__subtitle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.2vw, 1.2rem);
  color: var(--clr-text-secondary);
  margin-bottom: 28px;
  min-height: 2.2em;
  animation: heroFadeIn 0.7s ease 0.4s both;
}
.hero__subtitle-prefix { color: var(--clr-primary); font-weight: 700; font-size: 1.2em; }
.hero__typing          { color: var(--clr-text); font-weight: 500; }
.hero__cursor          { color: var(--clr-primary); animation: blink 1.1s infinite; font-weight: 300; }

@keyframes blink  { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
@keyframes pulse  { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(0.75); } }

/* Description */
.hero__description {
  font-size: 1.05rem;
  color: var(--clr-text-secondary);
  max-width: 600px;
  margin: 0 auto 38px;
  line-height: 1.85;
  animation: heroFadeIn 0.7s ease 0.5s both;
}

/* CTA buttons */
.hero__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 44px;
  flex-wrap: wrap;
  animation: heroFadeIn 0.7s ease 0.6s both;
}

/* Social links */
.hero__socials {
  display: flex;
  justify-content: center;
  gap: 14px;
  animation: heroFadeIn 0.7s ease 0.7s both;
}
.hero__social-link {
  width: 46px; height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--clr-border);
  color: var(--clr-text-secondary);
  font-size: 1.1rem;
  transition: all var(--t-normal);
  background: rgba(255,255,255,0.02);
}
.hero__social-link:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: var(--clr-primary-dim);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 212, 255, 0.2);
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  color: var(--clr-text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  animation: heroFadeIn 0.7s ease 1.2s both;
}
.hero__scroll-indicator {
  width: 22px; height: 38px;
  border: 2px solid rgba(0, 212, 255, 0.25);
  border-radius: 11px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 6px;
}
.hero__scroll-dot {
  width: 4px; height: 8px;
  background: var(--clr-primary);
  border-radius: 2px;
  animation: scrollDot 2.2s ease-in-out infinite;
}
@keyframes scrollDot {
  0%   { transform: translateY(0);   opacity: 1; }
  80%  { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(0);   opacity: 0; }
}

/* ============================================================
   9. STATS BAR
   ============================================================ */
.stats {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  padding: 52px 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stats__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 16px;
  border-right: 1px solid var(--clr-border);
}
.stats__item:last-child { border-right: none; }

.stats__number {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 4.5vw, 3.4rem);
  font-weight: 900;
  color: var(--clr-primary);
  line-height: 1;
  margin-bottom: 10px;
}
.stats__number::after { content: '+'; font-size: 0.65em; vertical-align: super; }

.stats__label {
  font-size: 0.8rem;
  color: var(--clr-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.5;
}

/* ============================================================
   10. ABOUT
   ============================================================ */
.about { background: var(--clr-bg); }

.about__grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 80px;
  align-items: start;
}

/* Photo / Avatar */
.about__image-wrap { position: relative; }

.about__image-container {
  position: relative;
  width: 280px;
  height: 280px;
}

.about__image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, rgba(0, 212, 255, 0.06), rgba(124, 58, 237, 0.06));
  border: 2px solid var(--clr-border);
  border-radius: var(--r-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.about__image-initials {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  color: rgba(0, 212, 255, 0.35);
  letter-spacing: 0.05em;
  user-select: none;
}

/* Add an actual photo by replacing the placeholder div with:
   <img src="assets/images/profile.jpg" alt="Arsalan Fareed Abid"
        style="width:100%;height:100%;object-fit:cover;border-radius:var(--r-xl);" /> */

.about__image-scan {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(0, 212, 255, 0.05) 50%,
    transparent 100%
  );
  animation: scanLine 4s ease-in-out infinite;
}
@keyframes scanLine {
  0%, 100% { transform: translateY(-100%); opacity: 0; }
  30%       { opacity: 1; }
  70%       { opacity: 1; }
  99%       { transform: translateY(100%); opacity: 0; }
}

.about__image-glow {
  position: absolute;
  inset: -24px;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.1), transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.about__status-card {
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 20px;
  background: var(--clr-bg-alt);
  border: 1px solid rgba(6, 214, 160, 0.3);
  border-radius: var(--r-full);
  font-size: 0.82rem;
  color: var(--clr-green);
  white-space: nowrap;
  font-weight: 500;
  box-shadow: var(--sh-md);
}
.about__status-dot {
  width: 8px; height: 8px;
  background: var(--clr-green);
  border-radius: 50%;
  animation: pulse 2.2s infinite;
}

/* Bio content */
.about__content { padding-top: 4px; }

.about__text {
  color: var(--clr-text-secondary);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 20px;
}
.about__text strong { color: var(--clr-text); font-weight: 600; }

.about__traits {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0;
}

.about__trait {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-full);
  font-size: 0.85rem;
  color: var(--clr-text-secondary);
  transition: all var(--t-normal);
  cursor: default;
}
.about__trait i { color: var(--clr-primary); font-size: 0.78rem; }
.about__trait:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: var(--clr-primary-dim);
  transform: translateY(-2px);
}

.about__cta { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============================================================
   11. SKILLS
   ============================================================ */
.skills { background: var(--clr-bg-alt); }

.skills__categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skills__category {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: 28px;
  backdrop-filter: blur(8px);
  transition: border-color var(--t-normal), box-shadow var(--t-normal), transform var(--t-normal);
}
.skills__category:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--sh-primary);
  transform: translateY(-4px);
}

.skills__category-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.skills__category-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--clr-primary-dim), var(--clr-purple-dim));
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.skills__category-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-text);
}

.skills__tags { display: flex; flex-wrap: wrap; gap: 8px; }

.skill-tag {
  padding: 5px 13px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--r-full);
  font-size: 0.79rem;
  color: var(--clr-text-secondary);
  transition: all var(--t-fast);
  cursor: default;
  user-select: none;
}
.skill-tag:hover {
  background: var(--clr-primary-dim);
  border-color: var(--clr-border-hover);
  color: var(--clr-primary);
}

.skill-tag--primary {
  background: rgba(0, 212, 255, 0.07);
  border-color: rgba(0, 212, 255, 0.2);
  color: rgba(0, 212, 255, 0.85);
}
.skill-tag--primary:hover {
  background: rgba(0, 212, 255, 0.14);
  color: var(--clr-primary);
}

/* ============================================================
   12. EXPERIENCE TIMELINE
   ============================================================ */
.experience { background: var(--clr-bg); }

.timeline {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline__item {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 20px;
  margin-bottom: 36px;
}
.timeline__item:last-child { margin-bottom: 0; }

.timeline__marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 26px;
}
.timeline__marker-dot {
  width: 16px; height: 16px;
  background: var(--clr-primary);
  border-radius: 50%;
  border: 3px solid var(--clr-bg);
  box-shadow: 0 0 0 2px var(--clr-primary), 0 0 20px rgba(0, 212, 255, 0.4);
  flex-shrink: 0;
  z-index: 1;
}
.timeline__marker-line {
  flex: 1;
  width: 2px;
  background: linear-gradient(to bottom, rgba(0, 212, 255, 0.4), transparent);
  margin-top: 8px;
}

.timeline__card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: 28px 32px;
  backdrop-filter: blur(8px);
  transition: border-color var(--t-normal), box-shadow var(--t-normal);
}
.timeline__card:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--sh-primary);
}

.timeline__card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.timeline__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 5px;
}

.timeline__company {
  font-size: 0.88rem;
  color: var(--clr-primary);
  font-weight: 500;
}
.timeline__location { color: var(--clr-text-muted); }

.timeline__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 7px;
  flex-shrink: 0;
}

.timeline__badge {
  padding: 3px 12px;
  border-radius: var(--r-full);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  background: var(--clr-primary-dim);
  border: 1px solid rgba(0, 212, 255, 0.2);
  color: var(--clr-primary);
}
.timeline__badge--purple {
  background: var(--clr-purple-dim);
  border-color: rgba(124, 58, 237, 0.3);
  color: #a78bfa;
}
.timeline__badge--green {
  background: var(--clr-green-dim);
  border-color: rgba(6, 214, 160, 0.3);
  color: var(--clr-green);
}

.timeline__date {
  font-family: var(--font-mono);
  font-size: 0.77rem;
  color: var(--clr-text-muted);
}

.timeline__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.timeline__list li {
  position: relative;
  padding-left: 20px;
  color: var(--clr-text-secondary);
  font-size: 0.93rem;
  line-height: 1.65;
}
.timeline__list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--clr-primary);
  font-size: 0.75rem;
  top: 3px;
}

.timeline__tags { display: flex; flex-wrap: wrap; gap: 7px; }
.timeline__tag {
  padding: 3px 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--r-full);
  font-size: 0.73rem;
  color: var(--clr-text-muted);
  font-family: var(--font-mono);
}

/* ============================================================
   13. EDUCATION
   ============================================================ */
.education { background: var(--clr-bg-alt); }

.education__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.education__card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-xl);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-normal), box-shadow var(--t-normal), transform var(--t-normal);
  backdrop-filter: blur(8px);
}
.education__card:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--sh-primary);
  transform: translateY(-5px);
}

.education__card-top-bar {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), #39d353);
}
.education__card-top-bar--secondary {
  background: linear-gradient(90deg, #39d353, var(--clr-primary));
}

.education__card-icon {
  width: 54px; height: 54px;
  background: linear-gradient(135deg, rgba(0,212,255,0.14), rgba(0,212,255,0.04));
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 1.4rem;
  margin-bottom: 20px;
  flex-shrink: 0;
}
.education__card-icon--secondary {
  background: linear-gradient(135deg, var(--clr-purple-dim), rgba(124,58,237,0.04));
  border-color: rgba(124,58,237,0.2);
  color: #a78bfa;
}

.education__degree-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--r-full);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.education__degree-tag--current {
  background: var(--clr-green-dim);
  border: 1px solid rgba(6,214,160,0.3);
  color: var(--clr-green);
}
.education__degree-tag--completed {
  background: var(--clr-primary-dim);
  border: 1px solid rgba(0,212,255,0.2);
  color: var(--clr-primary);
}

.education__degree {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 10px;
  line-height: 1.4;
}

.education__institution, .education__dates {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.875rem;
  margin-bottom: 6px;
}
.education__institution { color: var(--clr-primary); font-weight: 500; }
.education__dates { font-family: var(--font-mono); color: var(--clr-text-muted); font-size: 0.8rem; }

.education__description {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  line-height: 1.75;
  margin: 16px 0;
}
.education__description strong { color: var(--clr-text); font-weight: 600; }

.education__highlights { display: flex; flex-wrap: wrap; gap: 8px; }
.education__highlight {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--clr-text-secondary);
  padding: 3px 0;
}
.education__highlight i { color: var(--clr-green); font-size: 0.68rem; }
.education__highlight--gold { color: var(--clr-gold); }
.education__highlight--gold i { color: var(--clr-gold); }

/* ============================================================
   14. CERTIFICATIONS
   ============================================================ */
.certifications { background: var(--clr-bg); }

.certs__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.certs__grid--centered {
  grid-template-columns: repeat(2, minmax(0, 420px));
  justify-content: center;
}

.cert-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-normal), box-shadow var(--t-normal), transform var(--t-normal);
  backdrop-filter: blur(8px);
}
.cert-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.03), transparent 60%);
  pointer-events: none;
}
.cert-card:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--sh-primary);
  transform: translateY(-3px);
}

.cert-card__icon {
  width: 46px; height: 46px;
  background: linear-gradient(135deg, var(--clr-primary-dim), var(--clr-purple-dim));
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 1.15rem;
  flex-shrink: 0;
}

.cert-card__content { flex: 1; min-width: 0; }

.cert-card__title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 5px;
  line-height: 1.3;
}
.cert-card__issuer {
  display: block;
  font-size: 0.78rem;
  color: var(--clr-primary);
  font-weight: 500;
  margin-bottom: 4px;
}
.cert-card__date {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--clr-text-muted);
}

.cert-card__verified {
  color: rgba(0, 212, 255, 0.25);
  font-size: 1.6rem;
  flex-shrink: 0;
  transition: color var(--t-normal);
}
.cert-card:hover .cert-card__verified { color: rgba(0, 212, 255, 0.5); }

/* ============================================================
   15. PROJECTS
   ============================================================ */
.projects { background: var(--clr-bg-alt); }

.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.projects__grid--centered {
  grid-template-columns: repeat(2, minmax(0, 500px));
  justify-content: center;
}

.project-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-xl);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-normal), box-shadow var(--t-normal), transform var(--t-normal);
  backdrop-filter: blur(8px);
}
.project-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-purple));
  opacity: 0;
  transition: opacity var(--t-normal);
}
.project-card:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--sh-primary);
  transform: translateY(-6px);
}
.project-card:hover::after { opacity: 1; }

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.project-card__icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--clr-primary-dim), var(--clr-purple-dim));
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 1.2rem;
}
.project-card__links { display: flex; gap: 8px; }

.project-card__link {
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  font-size: 0.82rem;
  transition: all var(--t-fast);
}
.project-card__link:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: var(--clr-primary-dim);
}

.project-card__title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--clr-text);
}
.project-card__description {
  font-size: 0.88rem;
  color: var(--clr-text-secondary);
  line-height: 1.75;
  flex: 1;
}

.project-card__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.project-tag {
  padding: 4px 11px;
  background: var(--clr-primary-dim);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: var(--r-full);
  font-size: 0.73rem;
  color: rgba(0,212,255,0.85);
  font-family: var(--font-mono);
}

/* ============================================================
   16. CONTACT
   ============================================================ */
.contact { background: var(--clr-bg); }

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
  max-width: 980px;
  margin: 0 auto;
}

.contact__info { display: flex; flex-direction: column; gap: 14px; }

.contact__info-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  transition: border-color var(--t-normal), box-shadow var(--t-normal), transform var(--t-normal);
}
.contact__info-item--link { cursor: pointer; }
.contact__info-item--link:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--sh-primary);
  transform: translateX(4px);
}

.contact__info-icon {
  width: 40px; height: 40px;
  background: var(--clr-primary-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 1rem;
  flex-shrink: 0;
}
.contact__info-content { flex: 1; min-width: 0; }
.contact__info-label {
  display: block;
  font-size: 0.7rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 3px;
}
.contact__info-value {
  color: var(--clr-text);
  font-size: 0.92rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.contact__info-arrow {
  color: var(--clr-text-muted);
  font-size: 0.75rem;
  flex-shrink: 0;
  transition: color var(--t-fast), transform var(--t-fast);
}
.contact__info-item--link:hover .contact__info-arrow {
  color: var(--clr-primary);
  transform: translate(2px, -2px);
}

.contact__availability {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px;
  background: rgba(6,214,160,0.05);
  border: 1px solid rgba(6,214,160,0.22);
  border-radius: var(--r-md);
  font-size: 0.875rem;
  color: var(--clr-green);
  line-height: 1.5;
  margin-top: 4px;
}
.contact__availability-dot {
  width: 8px; height: 8px;
  background: var(--clr-green);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 5px;
  animation: pulse 2.2s infinite;
}

/* Form */
.contact__form { display: flex; flex-direction: column; gap: 18px; }

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form__group { display: flex; flex-direction: column; gap: 7px; }

.form__label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text-secondary);
  letter-spacing: 0.01em;
}

.form__input, .form__textarea {
  background: rgba(8, 16, 32, 0.9);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.925rem;
  color: var(--clr-text);
  transition: border-color var(--t-normal), box-shadow var(--t-normal), background var(--t-normal);
  outline: none;
  resize: none;
  width: 100%;
}
.form__input::placeholder, .form__textarea::placeholder { color: var(--clr-text-muted); }
.form__input:focus, .form__textarea:focus {
  border-color: var(--clr-primary);
  background: rgba(0,212,255,0.03);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.form__note {
  font-size: 0.82rem;
  text-align: center;
  color: var(--clr-text-muted);
  min-height: 1.2em;
}

/* ============================================================
   17. FOOTER
   ============================================================ */
.footer {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  padding: 52px 0 32px;
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer__logo {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  transition: opacity var(--t-fast);
}
.footer__logo:hover { opacity: 0.75; }
.footer__logo-bracket { color: var(--clr-primary); }
.footer__logo-name    { color: var(--clr-text); }

.footer__tagline {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
}

.footer__socials { display: flex; gap: 12px; }
.footer__social {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  font-size: 1rem;
  transition: all var(--t-normal);
}
.footer__social:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: var(--clr-primary-dim);
  transform: translateY(-3px);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
}
.footer__nav a {
  font-size: 0.83rem;
  color: var(--clr-text-muted);
  transition: color var(--t-fast);
}
.footer__nav a:hover { color: var(--clr-primary); }

.footer__copy {
  font-size: 0.78rem;
  color: var(--clr-text-muted);
  padding-top: 16px;
  border-top: 1px solid var(--clr-border);
  width: 100%;
  text-align: center;
}

/* ============================================================
   18. BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px; height: 44px;
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  font-size: 0.9rem;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--t-normal);
  box-shadow: var(--sh-sm);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--clr-primary-dim);
  border-color: var(--clr-primary);
  box-shadow: var(--sh-primary);
  transform: translateY(-3px);
}

/* ============================================================
   19. RESPONSIVE
   ============================================================ */

/* Tablet ------------------------------------------------- */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 240px 1fr;
    gap: 52px;
  }

  .about__image-container { width: 240px; height: 240px; }

  .skills__categories { grid-template-columns: repeat(2, 1fr); }

  .certs__grid { grid-template-columns: repeat(2, 1fr); }

  .projects__grid { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile landscape --------------------------------------- */
@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .section { padding: 76px 0; }

  /* Nav mobile */
  .nav__cta { display: none; }
  .nav__toggle { display: flex; }

  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(5,11,20,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--t-normal);
    border-bottom: 1px solid var(--clr-border);
  }
  .nav__links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav__link { padding: 12px 16px; }

  /* Stats */
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__item { border-right: none; border-bottom: 1px solid var(--clr-border); }
  .stats__item:nth-child(odd)    { border-right: 1px solid var(--clr-border); }
  .stats__item:nth-last-child(-n+2) { border-bottom: none; }

  /* About */
  .about__grid { grid-template-columns: 1fr; gap: 56px; }
  .about__image-container { width: 220px; height: 220px; margin: 0 auto; }

  /* Skills */
  .skills__categories { grid-template-columns: 1fr; }

  /* Timeline */
  .timeline__card-header { flex-direction: column; gap: 12px; }
  .timeline__meta { align-items: flex-start; flex-direction: row; flex-wrap: wrap; }

  /* Education */
  .education__grid { grid-template-columns: 1fr; }

  /* Certifications */
  .certs__grid { grid-template-columns: 1fr; }

  /* Projects */
  .projects__grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact__grid { grid-template-columns: 1fr; gap: 40px; }
  .form__row { grid-template-columns: 1fr; }
}

/* Mobile portrait ---------------------------------------- */
@media (max-width: 480px) {
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; justify-content: center; }

  .about__cta { flex-direction: column; }
  .about__cta .btn { width: 100%; justify-content: center; }

  .education__card { padding: 28px 20px; }

  .back-to-top { bottom: 16px; right: 16px; }
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 2px;
  border-radius: 4px;
}