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

/* DESIGN SYSTEM */
:root {
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-muted: #86868b;
  --accent: #0071e3;
  --surface: #ffffff;
  --surface-soft: #f5f5f7;
  --border-subtle: #e5e5e7;

  --space-xs: clamp(8px, 1vw, 12px);
  --space-sm: clamp(16px, 2vw, 24px);
  --space-md: clamp(32px, 4vw, 48px);
  --space-lg: clamp(64px, 6vw, 96px);
  --space-xl: clamp(96px, 8vw, 140px);

  --transition-smooth: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* BASE */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: clamp(16px, 1vw + 14px, 18px);
  line-height: 1.75;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  background-color: var(--surface);

  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

h1, h2, h3 {
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

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

/* HEADER */
header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-sm) 0;
  z-index: 1000;
}

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

.logo {
  font-weight: 600;
  font-size: clamp(20px, 1.5vw, 26px);
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-sm);
}

nav a {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-smooth);
}

nav a:hover {
  color: var(--accent);
}

/* HERO */
#hero {
  display: flex;
  align-items: center;
  min-height: 90vh;
  padding: var(--space-xl) 0;
  text-align: center;
}

.hero-content {
  max-width: 720px;
  margin: 0 auto;
}

#hero h1 {
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

#hero p {
  font-size: clamp(16px, 1.2vw + 14px, 20px);
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

/* BUTTONS */
.btn {
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 15px;
  transition: all var(--transition-smooth);
  display: inline-block;
}

.btn-primary {
  background: var(--text-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-2px);
}

.btn-secondary {
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* WORK */
#work {
  padding: var(--space-xl) 0;
}

#work h2 {
  font-size: clamp(24px, 2.5vw, 40px);
  font-weight: 600;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.portfolio-item {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
  transition: transform var(--transition-smooth),
              box-shadow var(--transition-smooth);
}

/* Portfolio stagger animation */

.portfolio-item:nth-child(1) {
  transition-delay: 0ms;
}

.portfolio-item:nth-child(2) {
  transition-delay: 120ms;
}

.portfolio-item:nth-child(3) {
  transition-delay: 240ms;
}

.portfolio-item:nth-child(4) {
  transition-delay: 0ms;
}

.portfolio-item:nth-child(5) {
  transition-delay: 120ms;
}

.portfolio-item:nth-child(6) {
  transition-delay: 240ms;
}

.portfolio-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.portfolio-item img{

width:100%;
height:100%;

object-fit:cover;

display:block;

border-radius:6px;

}

.portfolio-item h3 {
  font-size: clamp(18px, 1.5vw, 22px);
  font-weight: 600;
  padding: var(--space-sm);
}

.portfolio-item p {
  padding: 0 var(--space-sm) var(--space-sm);
  font-size: clamp(14px, 0.8vw + 12px, 16px);
  color: var(--text-muted);
}

.portfolio-placeholder {
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  font-size: 14px;
  color: white;
  letter-spacing: 0.05em;
}

.placeholder-1 {
  background: linear-gradient(135deg, #0071e3, #6e6e73);
}

.placeholder-2 {
  background: linear-gradient(135deg, #1d1d1f, #86868b);
}

.placeholder-3 {
  background: linear-gradient(135deg, #444, #0071e3);
}

/* SKILLS */
#skills {
  padding: var(--space-xl) 0;
  background: var(--surface-soft);
  text-align: center;
}

#skills h2 {
  font-size: clamp(24px, 2.5vw, 40px);
  font-weight: 600;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.skill-item h3 {
  font-size: clamp(18px, 1.5vw, 22px);
  font-weight: 600;
}

.skill-item p {
  font-size: clamp(14px, 0.8vw + 12px, 16px);
}

.skill-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-sm);
  color: var(--text-primary);
}

.skill-icon svg {
  width: 100%;
  height: 100%;
  stroke-width: 1.5;
}

/* CTA */
.cta-section {
  padding: var(--space-xl) var(--space-sm);
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(24px, 2.5vw, 40px);
  font-weight: 600;
}

.cta-section p {
  color: var(--text-muted);
}

/* FOOTER */
footer {
  padding: var(--space-lg) 0;
  text-align: center;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero-buttons {
    flex-direction: column;
  }

  .header-container {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

/* HERO SCROLL FADE */

.fade-hero {
  opacity: 0;
  transform: translateY(60px) scale(0.97);
  filter: blur(8px);
  transition:
    opacity 1.2s cubic-bezier(0.16,1,0.3,1),
    transform 1.2s cubic-bezier(0.16,1,0.3,1),
    filter 1.2s cubic-bezier(0.16,1,0.3,1);
}

.fade-hero.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

/* visible state */

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

/* stagger delay */

.delay-1 {
  transition-delay: 200ms;
}

/* SCROLL PROGRESS BAR */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--accent);
  z-index: 2000;
  transition: width 0.1s linear;
}

/* HERO PARALLAX */

.hero-parallax {
  will-change: transform;
}

/* TEXT REVEAL */

.reveal-text {
  opacity: 0;
  transform: translateY(50px);
  filter: blur(8px);
  transition:
    opacity 900ms cubic-bezier(0.16,1,0.3,1),
    transform 900ms cubic-bezier(0.16,1,0.3,1),
    filter 900ms cubic-bezier(0.16,1,0.3,1);
}

.reveal-text.visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* PORTFOLIO FADE UP */

.fade-up {
  opacity: 0;
  transform: translateX(-60px);
  transition:
    opacity 900ms cubic-bezier(0.16,1,0.3,1),
    transform 900ms cubic-bezier(0.16,1,0.3,1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-left {
  opacity: 0;
  transform: translateX(-80px);
  transition: all 0.9s cubic-bezier(.16,1,.3,1);
}

.fade-left.show {
  opacity: 1;
  transform: translateX(0);
}

/* BLUR REVEAL */

.blur-reveal {
  opacity: 0;
  filter: blur(10px);
  transform: scale(0.98);
  transition:
    opacity 1s cubic-bezier(0.16,1,0.3,1),
    filter 1s cubic-bezier(0.16,1,0.3,1),
    transform 1s cubic-bezier(0.16,1,0.3,1);
}

.blur-reveal.visible {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

/* MOBILE MENU BUTTON */

.menu-toggle {
  width: 28px;
  height: 14px;
  display: none;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  z-index: 2001;
}

.menu-toggle span {
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  transition: all 0.4s cubic-bezier(0.16,1,0.3,1);
}

/* ANIMATION INTO X */

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(8px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-8px);
}

/* MOBILE NAV */

@media (max-width: 768px) {

  .menu-toggle {
    display: flex;
  }

  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: white;
    padding-top: 120px;
    transition: right 0.5s cubic-bezier(0.16,1,0.3,1);
    box-shadow: -10px 0 40px rgba(0,0,0,0.08);
  }

  nav.active {
    right: 0;
  }

  nav ul {
    flex-direction: column;
    align-items: center;
    gap: 40px;
  }

  nav a {
    font-size: 22px;
  }

}