/* ================================================================
   style.css
   Portfolio — "The Architectural Syntax" Design System
   ================================================================

   TABLE OF CONTENTS
   1. CSS Custom Properties (Design Tokens)
   2. Reset & Base Styles
   3. Navigation Bar
   4. Hero Section
   5. Buttons
   6. Tech Stack Chips
   7. Terminal Visual
   8. Stats Row
   9. Featured Projects
   10. Footer
   11. Fade-in Animation
   12. Responsive (Mobile)
================================================================ */
:root {
  --surface:               #060e20;   
  --surface-container-low: #091328;   
  --surface-container:     #0f1930;   
  --surface-container-high:#162040;   
  --surface-bright:        #1f2b49;  

  --primary:  #46ff78;   
  --tertiary: #84ecff;   

  --on-surface:         #dee5ff;   
  --on-surface-variant: #8a94b0;   
  --on-primary:         #060e20;   

  --font-display: 'Space Grotesk', sans-serif;  
  --font-body:    'Manrope', sans-serif;        

  --space-2:  0.5rem;    
  --space-3:  0.75rem;   
  --space-4:  1rem;      
  --space-6:  1.5rem;    
  --space-8:  2rem;     
  --space-12: 3rem;      
  --space-16: 4rem;    
}

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

html {
  scroll-behavior: smooth; 
}

body {
  background-color: var(--surface);
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased; 
}

a {
  color: inherit;
  text-decoration: none;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100; 
  display: flex;
  justify-content: space-between; 
  align-items: center;
  padding: var(--space-4) var(--space-8);
  background: rgba(31, 43, 73, 0.6); 
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px); 
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--on-surface);
}

.nav__logo span {
  color: var(--primary);
}

.nav__links {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.nav__links a {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  transition: color 0.2s ease; 
}

.nav__links a:hover {
  color: var(--primary);
}

.nav__menu-btn {
  display: none;
}

.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  grid-template-rows: auto auto;
  align-items: start;
  gap: var(--space-8);
  padding: var(--space-16) var(--space-8);
  padding-top: calc(var(--space-16) + 64px);
  background:
    radial-gradient(ellipse 60% 50% at 0% 30%, rgba(70, 255, 120, 0.06) 0%, transparent 70%),
    var(--surface);
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
}

.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--on-surface);
}

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

.hero__sub {
  font-size: 1rem;
  color: var(--on-surface-variant);
  max-width: 480px;
  line-height: 1.7;
}

.hero__stack {
  display: flex;
  flex-wrap: wrap; 
  gap: var(--space-2);
}

.hero__ctas {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__terminal,
.hero__about {
  width: 100%;
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.btn-primary {
  display: inline-block;
  padding: 12px var(--space-6);
  background: var(--primary);
  color: var(--on-primary);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: opacity 0.2s ease;
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-secondary {
  display: inline-block;
  padding: 12px var(--space-6);
  background: var(--surface-container-high);
  color: var(--primary);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: background 0.2s ease;
}

.btn-secondary:hover {
  background: var(--surface-bright);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px var(--space-3);
  background: var(--surface-container);
  border-radius: 2px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--on-surface-variant);
}

.chip::before {
  content: '';        
  width: 4px;
  height: 4px;
  border-radius: 50%; 
  background: var(--primary);
  flex-shrink: 0;     
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-frame {
  position: relative;   
  width: 340px;
  height: 340px;
  border-radius: 50%;   
  background: conic-gradient(
    var(--primary) 0deg,
    rgba(70, 255, 120, 0.2) 120deg,
    transparent 200deg,
    var(--primary) 360deg
  );
  padding: 3px;         
  animation: spin-ring 8s linear infinite;
}

@keyframes spin-ring {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.profile-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;     
  object-position: top;  
  display: block;
  animation: counter-spin 8s linear infinite;
}

@keyframes counter-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}

.profile-badge {
  position: absolute;
  bottom: 16px;
  right: -8px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--surface-bright);
  border-radius: 2px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--on-surface);
  animation: counter-spin 8s linear infinite;
}

.profile-badge__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s ease-in-out infinite;
  animation-name: pulse;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.terminal {
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  background: var(--surface-container);
  border-radius: 6px;
  overflow: hidden; 
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-3) var(--space-4);
  background: var(--surface-container-high);
}

.terminal__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal__dot--red    { background: #ff5f57; }
.terminal__dot--yellow { background: #febc2e; }
.terminal__dot--green  { background: #28c840; }

.terminal__title {
  margin: 0 auto;
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--on-surface-variant);
  letter-spacing: 0.05em;
}

.terminal__body {
  padding: var(--space-6);
  font-family: 'Space Grotesk', monospace;
  font-size: 0.8125rem;
  line-height: 1.9;
}

.t-comment { color: #4a5880; }              
.t-keyword  { color: var(--tertiary); }     
.t-string   { color: var(--primary); }      
.t-var      { color: var(--on-surface); }   
.t-fn       { color: #c9a8ff; }             
.t-primary  { color: var(--primary); }      

.cursor {
  display: inline-block;
  width: 8px;
  height: 1em;
  background: var(--primary);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.about-card {
  height: 100%;
  background: var(--surface-container);
  border-radius: 4px;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about-card__eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--tertiary);
}

.about-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--on-surface);
}

.about-card__body {
  font-size: 0.9rem;
  color: var(--on-surface-variant);
  line-height: 1.75;
}

.stats {
  background: var(--surface-container-low);
  padding: var(--space-12) var(--space-8);
}

.stats__inner {
  max-width: 960px;
  margin: 0 auto; 
  display: grid;
  grid-template-columns: repeat(3, 1fr); 
  gap: var(--space-8);
}

.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.stat__label {
  margin-top: var(--space-2);
  font-size: 0.8125rem;
  color: var(--on-surface-variant);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.projects {
  padding: var(--space-16) var(--space-8);
  background: var(--surface); 
}

.section-header {
  max-width: 960px;
  margin: 0 auto var(--space-12);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--on-surface);
}

.section-header a {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  color: var(--on-surface-variant);
  letter-spacing: 0.06em;
  transition: color 0.2s;
}

.section-header a:hover {
  color: var(--primary);
}

.projects__grid {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.card {
  background: var(--surface-container);
  border-radius: 4px;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: background 0.25s ease;
}

.card:hover {
  background: var(--surface-container-high);
}

.card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card__lang {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tertiary);
}

.card__link {
  font-size: 0.75rem;
  color: var(--on-surface-variant);
  transition: color 0.2s;
}

.card__link:hover {
  color: var(--primary);
}

.card__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--on-surface);
}

.card__desc {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
  flex: 1; 
}

.card__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}


.footer {
  background: var(--surface-container-low);
  padding: var(--space-8);
  text-align: center;
}

.footer p {
  font-size: 0.8125rem;
  color: var(--on-surface-variant);
}

.footer span {
  color: var(--primary);
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in:nth-child(1) { transition-delay: 0s; }
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }

@media (max-width: 768px) {
  /* ---- Nav / Hamburger ---- */
  .nav {
    position: relative;
    flex-wrap: wrap;
  }

  .nav__menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
  }

  .nav__menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--on-surface);
    border-radius: 1px;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  /* Hide links by default; shown when .nav--open is toggled */
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(15, 25, 48, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: var(--space-4) var(--space-8);
  }

  .nav--open .nav__links {
    display: flex;
  }

  .nav__links li {
    padding: var(--space-3) 0;
    border-bottom: 1px solid rgba(138, 148, 176, 0.1);
  }

  .nav__links li:last-child {
    border-bottom: none;
  }

  /* ---- Hero ---- */
  .hero {
    grid-template-columns: 1fr;
    padding: var(--space-8) var(--space-4);
    padding-top: calc(var(--space-12) + 64px);
  }

  .hero__terminal,
  .hero__about {
    grid-column: 1;
  }

  /* Shrink the photo on mobile */
  .profile-frame {
    width: 200px;
    height: 200px;
  }

  /* Prevent terminal code from overflowing narrow screens */
  .terminal__body {
    overflow-x: auto;
    font-size: 0.75rem;
  }

  /* ---- Stats ---- */
  .stats__inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}