/* ================= VARIABLES ================= */
:root {
  --purple: #8a2be2;
  --purple-light: #9c4dff;
  --bg-dark: #0a0a0f;
  --bg-card: rgba(255,255,255,0.04);
  --border: rgba(138,43,226,0.25);
  --glow: rgba(138,43,226,0.6);
  --white: #ffffff;
  --font: 'JetBrains Mono', monospace;
}

/* ================= RESET ================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: radial-gradient(circle at top, #151528, var(--bg-dark));
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ================= STARS ================= */
.stars {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1px 1px at 10% 20%, #fff, transparent),
    radial-gradient(1px 1px at 40% 80%, #fff, transparent),
    radial-gradient(1px 1px at 70% 30%, #fff, transparent),
    radial-gradient(1px 1px at 90% 60%, #fff, transparent);
  opacity: 0.6;
  pointer-events: none;
  animation: twinkle 6s infinite alternate;
}

@keyframes twinkle {
  from { opacity: 0.4; }
  to { opacity: 0.8; }
}

/* ================= NAVBAR ================= */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  height: 70px;
  background: rgba(10,10,15,0.95);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
}

.logo span {
  color: var(--purple);
}

nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav a {
  color: white;
  text-decoration: none;
  font-size: 0.9rem;
  opacity: 0.7;
  transition: 0.3s;
}

nav a:hover,
nav a.active {
  opacity: 1;
  color: var(--purple-light);
}

/* ================= SECTION ================= */
section {
  padding: 120px 1.5rem 80px;
  max-width: 1200px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  font-size: 2.4rem;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

h1 span {
  color: var(--purple);
}

.subtitle {
  text-align: center;
  opacity: 0.7;
  margin-bottom: 4rem;
  line-height: 1.6;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* ================= PROJECT GRID ================= */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: 0.35s;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  transform: translateY(-12px);
  box-shadow: 0 0 35px var(--glow);
}

.card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  background: rgba(138,43,226,0.15);
  color: var(--purple-light);
  margin-bottom: 1rem;
}

.card p {
  font-size: 0.9rem;
  opacity: 0.8;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech span {
  font-size: 0.7rem;
  padding: 0.35rem 0.6rem;
  background: rgba(255,255,255,0.06);
  border-radius: 6px;
}

/* ================= BUTTONS ================= */
.links {
  display: flex;
  gap: 1rem;
  margin-top: auto;
  flex-wrap: wrap;
}

.btn {
  font-size: 0.8rem;
  padding: 0.6rem 1.2rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--purple), var(--purple-light));
  color: white;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: 0.3s;
  white-space: nowrap;
}

.btn.outline {
  background: transparent;
  border: 1px solid var(--purple);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 20px var(--glow);
}

/* ================= FOOTER ================= */
footer {
  text-align: center;
  padding: 3rem 1rem 2rem;
  font-size: 0.75rem;
  opacity: 0.6;
}

/* ================= RESPONSIVE ================= */

/* Large Desktop (1440px and above) */
@media (min-width: 1440px) {
  section {
    max-width: 1400px;
  }
  
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Desktop (1024px - 1439px) */
@media (max-width: 1439px) and (min-width: 1024px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Tablet Landscape (768px - 1023px) */
@media (max-width: 1023px) and (min-width: 768px) {
  section {
    padding: 100px 2rem 60px;
  }
  
  h1 {
    font-size: 2.2rem;
  }
  
  .grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  
  nav {
    padding: 0 1.5rem;
  }
  
  nav ul {
    gap: 1.5rem;
  }
}

/* Tablet Portrait (600px - 767px) */
@media (max-width: 767px) and (min-width: 600px) {
  section {
    padding: 90px 1.5rem 50px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 0.95rem;
    margin-bottom: 3rem;
  }
  
  .grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  nav {
    padding: 0 1.5rem;
    height: 65px;
  }
  
  nav ul {
    gap: 1rem;
  }
  
  .logo {
    font-size: 1.4rem;
  }
  
  nav a {
    font-size: 0.85rem;
  }
}

/* Mobile Landscape (480px - 599px) */
@media (max-width: 599px) and (min-width: 480px) {
  section {
    padding: 80px 1.25rem 40px;
  }
  
  h1 {
    font-size: 1.8rem;
    letter-spacing: 1px;
  }
  
  .subtitle {
    font-size: 0.9rem;
    margin-bottom: 2.5rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 450px;
    margin: 0 auto;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .card h3 {
    font-size: 1.1rem;
  }
  
  .card p {
    font-size: 0.85rem;
  }
  
  nav {
    padding: 0 1rem;
    height: 60px;
  }
  
  nav ul {
    gap: 0.8rem;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  nav a {
    font-size: 0.8rem;
  }
  
  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
  }
  
  footer {
    padding: 2rem 1rem 1.5rem;
  }
}

/* Mobile Portrait (375px - 479px) */
@media (max-width: 479px) and (min-width: 375px) {
  section {
    padding: 70px 1rem 30px;
  }
  
  h1 {
    font-size: 1.6rem;
    letter-spacing: 0.5px;
  }
  
  .subtitle {
    font-size: 0.85rem;
    margin-bottom: 2rem;
    padding: 0 0.5rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  
  .card {
    padding: 1.25rem;
  }
  
  .card h3 {
    font-size: 1rem;
  }
  
  .card p {
    font-size: 0.8rem;
    line-height: 1.5;
  }
  
  .tag {
    font-size: 0.65rem;
    padding: 0.25rem 0.6rem;
  }
  
  .tech span {
    font-size: 0.65rem;
    padding: 0.3rem 0.5rem;
  }
  
  .links {
    gap: 0.75rem;
  }
  
  .btn {
    padding: 0.5rem 0.9rem;
    font-size: 0.7rem;
  }
  
  nav {
    padding: 0 0.75rem;
    height: 60px;
  }
  
  .logo {
    font-size: 1.2rem;
  }
  
  nav ul {
    gap: 0.6rem;
  }
  
  nav a {
    font-size: 0.75rem;
  }
  
  footer {
    padding: 1.5rem 0.75rem 1rem;
    font-size: 0.7rem;
  }
}

/* Small Mobile (320px - 374px) */
@media (max-width: 374px) {
  section {
    padding: 60px 0.75rem 20px;
  }
  
  h1 {
    font-size: 1.4rem;
  }
  
  .subtitle {
    font-size: 0.8rem;
    margin-bottom: 1.5rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .card {
    padding: 1rem;
  }
  
  .card h3 {
    font-size: 0.95rem;
  }
  
  .card p {
    font-size: 0.75rem;
    margin-bottom: 1rem;
  }
  
  .tag {
    font-size: 0.6rem;
    padding: 0.2rem 0.5rem;
    margin-bottom: 0.75rem;
  }
  
  .tech {
    gap: 0.4rem;
    margin-bottom: 1rem;
  }
  
  .tech span {
    font-size: 0.6rem;
    padding: 0.25rem 0.4rem;
  }
  
  .links {
    gap: 0.5rem;
    flex-direction: column;
  }
  
  .btn {
    padding: 0.5rem 0.8rem;
    font-size: 0.65rem;
    justify-content: center;
    width: 100%;
  }
  
  nav {
    padding: 0 0.5rem;
    height: 55px;
  }
  
  .logo {
    font-size: 1.1rem;
  }
  
  nav ul {
    gap: 0.5rem;
  }
  
  nav a {
    font-size: 0.7rem;
  }
  
  footer {
    padding: 1rem 0.5rem;
    font-size: 0.65rem;
  }
}

/* Extra Small Mobile (below 320px) */
@media (max-width: 319px) {
  section {
    padding: 50px 0.5rem 15px;
  }
  
  h1 {
    font-size: 1.2rem;
  }
  
  .subtitle {
    font-size: 0.75rem;
  }
  
  .card {
    padding: 0.75rem;
  }
  
  .card h3 {
    font-size: 0.9rem;
  }
  
  .card p {
    font-size: 0.7rem;
  }
  
  .tag {
    font-size: 0.55rem;
  }
  
  .tech span {
    font-size: 0.55rem;
  }
  
  .btn {
    padding: 0.4rem 0.6rem;
    font-size: 0.6rem;
  }
  
  nav {
    padding: 0 0.5rem;
    height: 50px;
  }
  
  .logo {
    font-size: 1rem;
  }
  
  nav ul {
    gap: 0.4rem;
  }
  
  nav a {
    font-size: 0.65rem;
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
  .card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
  
  .card:active {
    transform: scale(0.98);
  }
  
  .btn:active {
    transform: scale(0.95);
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .stars {
    animation: none;
  }
  
  .card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}