html {
  scroll-behavior: smooth;
}


/* —— Reset & Base */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0f0f0f;
  --fg: #ffffff;
  --accent: #FF6A00;
  --accent-hover: #ff8633;
  --card-bg: rgba(255,255,255,0.07);
  --card-hover: rgba(255,255,255,0.1);
  --overlay-bg: rgba(15,15,15,0.9);
  --text-secondary: #a0a0a0;
  --border-color: rgba(255,255,255,0.1);
  --shadow-subtle: 0 10px 30px rgba(0,0,0,0.2);
  --shadow-strong: 0 15px 40px rgba(0,0,0,0.4);
  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  height: 100%;
  overflow-x: hidden;
  font-weight: 300;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
}

a { 
  color: inherit; 
  text-decoration: none;
  transition: all 0.3s var(--ease-out-expo);
}

/* —— Hero Section —— */
.hero {
  display: flex;
  width: 100%;
  height: 100%;
}

/* LEFT COLUMN */
.hero-left {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, rgba(0,0,0,0.7) 0%, rgba(15,15,15,1) 100%);
  overflow: hidden;
  padding: 2rem;
}

/* Cursor (arrow) wrapper sits behind text */
 /* Cursor (arrow) wrapper */
 .cursor-wrapper {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* Title */
.hero-left h1 {
  position: relative;
  font-size: clamp(4rem, 8vw, 7rem);
  letter-spacing: -0.03em;
  z-index: 2;
  mix-blend-mode: difference;
  margin-bottom: 2rem;
  line-height: 0.9;
  font-weight: 800;
}

/* Social Icons under the H1 */
.social-icons {
  display: flex;
  gap: 1.5rem;
  z-index: 2;
  align-items: center;
}

.social-icons a:not(.btn-resume) {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transition: transform 0.4s var(--ease-out-expo), background 0.3s ease;
}

.social-icons a:not(.btn-resume):hover {
  transform: translateY(-5px);
  background: rgba(255,255,255,0.2);
}

.social-icons img {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
  filter: brightness(0) invert(1);
}

.social-icons img:hover {
  transform: scale(1.1);
}

.btn-resume {
  display: flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: 48px;
  padding: 0 2rem;
  background: var(--accent);
  border-radius: 24px;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: transform 0.4s var(--ease-out-expo), background 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 12px rgba(255, 106, 0, 0.3);
}

.btn-resume:hover {
  background: var(--accent-hover);
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(255, 106, 0, 0.4);
}

/* Cursor-arrow styling (unchanged) */
.cursor {
  position: absolute;
  transform-origin: 100px 100px;
}
.cursor img {
  display: block;
  width: 200px;
  transform-origin: 100px 100px;
}

/* RIGHT COLUMN */
.hero-right {
  flex: 1.2;
  max-width: 700px;
  background: var(--bg);
  padding-left: 3rem;
  padding-right: 3rem;
  padding-bottom: 3rem;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
  position: relative;
  border-left: 1px solid var(--border-color);
  overflow: scroll;
  height: 100vh;
}

.hero-right::-webkit-scrollbar {
  width: 6px;
}

.hero-right::-webkit-scrollbar-track {
  background: transparent;
}

.hero-right::-webkit-scrollbar-thumb {
  background-color: var(--accent);
  border-radius: 3px;
}

/* —— Tabs —— */
.tabs {
  display: flex;
  padding-top: 3rem;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
  padding-bottom: 1px;
}


.tab-button {
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 500;
  padding: 1rem 1.5rem;
  margin-right: 0.5rem;
  opacity: 0.8;
  transition: all 0.3s ease;
  position: relative;
  cursor: pointer;
  color: var(--fg);
}

.tab-button:hover { 
  opacity: 1;
  color: var(--accent);
}

.tab-button.active {
  opacity: 1;
  color: var(--accent);
  font-weight: 600;
}

.tab-button.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
}

.tab-content {
  display: block;
  padding-bottom: 5rem;
  scroll-margin-top: 6rem;
}


/* —— Aboout Me —— */
.section-icon {
  display: block;
  width: 100%;
  margin: 0 auto 1rem;
}

.about-description {
  font-size: 1.2rem;
  line-height: 1.3;
  text-align: left;
  max-width: 600px;
  margin: 1rem 0 1rem;
  color: #ddd;
}



/* —— Projects Section —— */

.section-title {
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.5rem;
}

.projects-grid {
  /* two columns, variable height, gutter between */
  column-count: 2;
  column-gap: 1.5rem;
  margin-top: 1rem;
}

.project-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: var(--card-bg);
  box-shadow: var(--shadow-subtle);
  transition: transform 0.5s var(--ease-out-expo), box-shadow 0.3s ease, background 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-strong);
  background: var(--card-hover);
}

.project-card img {
  display: block;
  width: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease-out-expo);
}
.project-info {
  position: absolute;
  bottom: 0; left: 0;
  width: 100%;
  padding: 1rem;
  background: rgba(18,18,18,0.9);
  transform: translateY(100%);
  transition: transform 0.3s;
}

.project-info {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem;
  background: linear-gradient(0deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.7) 70%, rgba(0,0,0,0) 100%);
  transform: translateY(0);
  transition: transform 0.5s var(--ease-out-expo);
}

.project-info h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.project-info p {
  font-size: 1rem;
  line-height: 1.25;
  color: var(--text-secondary);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s var(--ease-out-expo);
}

.project-card:hover .project-info p {
  max-height: 100px;
}

.publications-list li {
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border-radius: 10px;
  border-left: 4px solid var(--accent);
  transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
  list-style-type: none;
}

.publications-list li:hover {
  transform: translateX(5px);
  background: var(--card-hover);
  box-shadow: var(--shadow-subtle);
}

.publications-list a {
  display: block;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.pub-title {
  display: block;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

/* —— Responsive Adjustments —— */
@media (max-width: 1240px) {
  .hero {
    flex-direction: column;
    height: auto;
  }
  
  .hero-left {
    padding: 4rem 2rem;
    height: 100%;
    min-height: 400px;
  }
  
  .hero-right {
    display: grid;
    max-width: 100%;
    border-left: none;
    border-top: 1px solid var(--border-color);
  }
  
  .hero-left h1 {
    font-size: clamp(3rem, 10vw, 5rem);
    margin-top: 40px;
  }
}

@media (max-width: 768px) {
  .projects-grid {
    display: grid;
    grid-template-columns: 1fr;
  }
  
  .hero-right {
    padding: 2rem 1.5rem;
  }
  
  .tab-button {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .hero-left h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
  }
}