/**
 * Premium Portfolio Stylesheet (V4)
 * Classic Hero Layout by Gemini
 */

:root {
  /* Color Palette - Light Mode */
  --color-primary-rgb: 45, 125, 135; /* Refined Teal */
  --color-background-rgb: 248, 249, 250; /* Off-white */
  --color-surface-rgb: 255, 255, 255;
  --color-text-rgb: 18, 22, 23;
  --color-text-secondary-rgb: 108, 117, 125;
  --color-border-rgb: 222, 226, 230;

  /* Semantic Tokens - Light Mode */
  --text-color: rgb(var(--color-text-rgb));
  --text-secondary-color: rgb(var(--color-text-secondary-rgb));
  --background-color: rgb(var(--color-background-rgb));
  --surface-color: rgb(var(--color-surface-rgb));
  --primary-color: rgb(var(--color-primary-rgb));
  --border-color: rgba(var(--color-text-rgb), 0.1);
  --shadow-color: rgba(var(--color-text-rgb), 0.04);
  --shadow-color-hover: rgba(var(--color-text-rgb), 0.08);
  --navbar-bg: rgba(255, 255, 255, 0.7);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 64px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 200ms;
  --transition-slow: 350ms;
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-color-scheme="dark"] {
  /* Original Dark Mode Palette */
  --color-primary-rgb: 66, 179, 191;
  --color-background-rgb: 18, 18, 18;
  --color-surface-rgb: 28, 28, 28;
  --color-text-rgb: 228, 228, 229;
  --color-text-secondary-rgb: 160, 161, 167;
  --color-border-rgb: 55, 58, 64;
  --navbar-bg: rgba(18, 18, 18, 0.6);
}

/* Base & Typography */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-slow) var(--ease-out), color var(--transition-slow) var(--ease-out);
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.2; }
h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 var(--spacing-md); line-height: 1.6; color: var(--text-secondary-color); }
a { color: var(--primary-color); text-decoration: none; }

/* Layout */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }
section { padding: var(--spacing-xxl) 0; }
.section-title { text-align: center; margin-bottom: var(--spacing-xl); position: relative; }
.section-title::after { content: ''; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%); width: 50px; height: 3px; background: var(--primary-color); border-radius: var(--radius-sm); }

/* Navbar */
.navbar { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: var(--navbar-bg); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); transition: all var(--transition-slow) var(--ease-out); }
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.nav-logo a { font-weight: 700; font-size: 1.25rem; }
.nav-menu { display: flex; align-items: center; gap: var(--spacing-xl); }
.nav-link { font-size: 0.95rem; font-weight: 500; color: var(--text-secondary-color); position: relative; padding: var(--spacing-sm) 0; transition: color var(--transition-fast) var(--ease-out); }
.nav-link:hover, .nav-link.active { color: var(--primary-color); }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px; background-color: var(--primary-color); transform: scaleX(0); transform-origin: bottom right; transition: transform var(--transition-slow) var(--ease-out); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); transform-origin: bottom left; }
.theme-toggle { background: transparent; border: 1px solid var(--border-color); color: var(--text-secondary-color); width: 40px; height: 40px; border-radius: var(--radius-md); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all var(--transition-fast) var(--ease-out); }
.theme-toggle:hover { border-color: var(--primary-color); color: var(--primary-color); transform: scale(1.05); }
.hamburger { display: none; }


/* --- HERO SECTION CORRECTIONS START HERE --- */
.hero { 
  min-height: 100vh; 
  display: flex; 
  align-items: center; 
  padding-top: 72px; 
}

.hero-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: var(--spacing-xxl);
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  text-align: left;
}

@media (min-width: 992px) {
  .hero-content {
    grid-template-columns: 1.2fr 1fr;
    text-align: left;
  }
  .hero-buttons, .social-links, .hero-text {
    justify-content: flex-start;
  }
  .hero-text {
    align-items: flex-start;
    margin-left: 40px; /* <<--- new line to nudge text right */
  }
}

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

/* For responsiveness on smaller screens */
@media (max-width: 991px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    max-width: 600px;
  }
  .hero-text {
    align-items: center;
  }
  .hero-image {
    margin-top: var(--spacing-xl);
  }
}
/* --- HERO SECTION CORRECTIONS END HERE --- */



.hero-name { font-weight: 700; }
.hero-roles { font-size: 1.5rem; font-weight: 500; color: var(--text-secondary-color); margin: var(--spacing-sm) 0 var(--spacing-lg); height: 32px; }
.cursor { animation: blink 1s step-end infinite; color: var(--primary-color); font-weight: 600; }
@keyframes blink { 50% { opacity: 0; } }
.hero-description { font-size: 1.1rem; max-width: 55ch; }
.hero-buttons { display: flex; gap: var(--spacing-md); margin-top: var(--spacing-xl); }
.social-links { display: flex; gap: var(--spacing-md); margin-top: var(--spacing-xl); }
.social-links a { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; font-size: 1.25rem; color: var(--text-secondary-color); background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--radius-md); transition: all var(--transition-fast) var(--ease-out); }
.social-links a:hover { background-color: var(--primary-color); border-color: var(--primary-color); color: white; transform: translateY(-3px); box-shadow: 0 8px 20px rgba(var(--primary-color), 0.2); }
.hero-image { display: flex; justify-content: center; align-items: center; }
.image-placeholder { width: 350px; height: 350px; border-radius: var(--radius-full); position: relative; border: 1px solid var(--border-color); padding: var(--spacing-sm); background-color: var(--surface-color); }
.image-placeholder::before { content: ""; position: absolute; inset: 0; border-radius: var(--radius-full); padding: 3px; background: conic-gradient(from 0deg at 50% 50%, var(--primary-color), 60deg, transparent, 300deg, var(--primary-color)); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; animation: spin 4s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.image-placeholder img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-full); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-sm); padding: 12px var(--spacing-lg); font-size: 1rem; font-weight: 500; border-radius: var(--radius-md); border: 1px solid transparent; cursor: pointer; transition: all var(--transition-fast) var(--ease-out); }
.btn--primary { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }
.btn--primary:hover { background-color: rgba(var(--primary-color), 0.85); transform: translateY(-2px); box-shadow: 0 6px 15px rgba(var(--primary-color), 0.2); }
.btn--outline { background-color: transparent; color: var(--text-color); border-color: var(--border-color); }
.btn--outline:hover { background-color: var(--surface-color); border-color: var(--text-color); }

/* About Section */
.about { background-color: var(--surface-color); }
.about-content { max-width: 900px; margin: 0 auto; text-align: center; }
.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); margin: var(--spacing-xl) 0; }
.stat { background-color: var(--background-color); padding: var(--spacing-lg); border-radius: var(--radius-lg); border: 1px solid var(--border-color); }
.stat h3 { font-size: 2rem; color: var(--primary-color); font-weight: 700; }
.stat p { margin: 0; font-size: 0.9rem; font-weight: 500; }

/* Skills Section */
.skills-filter { display: flex; justify-content: center; gap: var(--spacing-sm); margin-bottom: var(--spacing-xl); flex-wrap: wrap; }
.filter-btn { padding: var(--spacing-sm) var(--spacing-md); border: 1px solid var(--border-color); background: var(--surface-color); color: var(--text-secondary-color); border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition-fast) var(--ease-out); font-weight: 500; }
.filter-btn:hover { color: var(--text-color); border-color: var(--text-color); }
.filter-btn.active { background: var(--primary-color); color: white; border-color: var(--primary-color); }
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--spacing-lg); }
.skill-card { perspective: 1500px; height: 200px; cursor: pointer; }
.skill-card-inner { position: relative; width: 100%; height: 100%; transition: transform 0.7s var(--ease-out); transform-style: preserve-3d; }
.skill-card:hover .skill-card-inner, .skill-card.flipped .skill-card-inner { transform: rotateY(180deg); }
.skill-card-front, .skill-card-back { position: absolute; width: 100%; height: 100%; -webkit-backface-visibility: hidden; backface-visibility: hidden; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: var(--spacing-lg); border-radius: var(--radius-lg); border: 1px solid var(--border-color); background: var(--surface-color); box-shadow: 0 4px 15px var(--shadow-color); }
.skill-card-back { background: var(--primary-color); color: white; transform: rotateY(180deg); }
.skill-icon { font-size: 2.5rem; margin-bottom: var(--spacing-md); color: var(--primary-color); }
.skill-card-back .skill-icon { color: white; }
.skill-name { font-size: 1.25rem; font-weight: 600; }
.skill-card-back p, .skill-card-back .skill-name { color: white; }


/* Projects Section */
.projects { background-color: var(--surface-color); }
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: var(--spacing-lg); }
.project-card { background: var(--background-color); border-radius: var(--radius-lg); border: 1px solid var(--border-color); overflow: hidden; transition: all var(--transition-slow) var(--ease-out); cursor: pointer; box-shadow: 0 4px 15px var(--shadow-color); }
.project-card:hover { transform: translateY(-8px); box-shadow: 0 12px 30px var(--shadow-color-hover); border-color: rgba(var(--primary-color), 0.5); }
.project-image { height: 220px; background: var(--surface-color); display: flex; align-items: center; justify-content: center; font-size: 3rem; color: var(--primary-color); }
.project-content { padding: var(--spacing-lg); }
.project-title { font-size: 1.3rem; margin-bottom: var(--spacing-sm); }
.tech-tag { display: inline-block; background: rgba(var(--primary-color), 0.1); color: var(--primary-color); padding: var(--spacing-xs) var(--spacing-sm); border-radius: var(--radius-sm); font-size: 0.75rem; font-weight: 600; }
.project-tech { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); margin-top: var(--spacing-md); }

/* Project Modal */
.project-expanded { position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center; padding: var(--spacing-md); background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(5px); opacity: 0; visibility: hidden; transition: all var(--transition-slow) var(--ease-out); }
.project-expanded.active { opacity: 1; visibility: visible; }
.project-modal { background: var(--surface-color); border-radius: var(--radius-lg); max-width: 800px; width: 100%; max-height: 90vh; overflow-y: auto; transform: scale(0.95); transition: transform var(--transition-slow) var(--ease-out); }
.project-expanded.active .project-modal { transform: scale(1); }
.project-modal-header { padding: var(--spacing-lg); display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border-color); position: sticky; top: 0; background: var(--surface-color); }
.project-modal-body { padding: var(--spacing-lg); }
.project-modal-close { background: transparent; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-secondary-color); }
.project-features ul { list-style: none; padding-left: 0; }
.project-features li { position: relative; padding-left: var(--spacing-lg); margin-bottom: var(--spacing-sm); }
.project-features li::before { content: '✓'; position: absolute; left: 0; color: var(--primary-color); font-weight: 600; }

/* Experience Section */
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::after { content: ''; position: absolute; width: 2px; background-color: var(--border-color); top: 0; bottom: 0; left: 50%; margin-left: -1px; }
.timeline-item { padding: var(--spacing-sm) var(--spacing-xl); position: relative; width: 50%; }
.timeline-item:nth-child(odd) { left: 0; }
.timeline-item:nth-child(even) { left: 50%; }
.timeline-dot { content: ''; position: absolute; width: 16px; height: 16px; background-color: var(--surface-color); border: 3px solid var(--primary-color); top: 24px; border-radius: 50%; z-index: 1; }
.timeline-item:nth-child(odd) .timeline-dot { right: -8px; }
.timeline-item:nth-child(even) .timeline-dot { left: -8px; }
.timeline-dot.current { animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(var(--primary-color), 0.7); } 70% { box-shadow: 0 0 0 10px rgba(var(--primary-color), 0); } 100% { box-shadow: 0 0 0 0 rgba(var(--primary-color), 0); } }
.timeline-content { padding: var(--spacing-lg); background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--radius-lg); }
.timeline-company { color: var(--primary-color); font-weight: 600; }
.timeline-period { font-size: 0.85rem; color: var(--text-secondary-color); margin: var(--spacing-xs) 0 var(--spacing-sm); display: block; }

/* Achievements Section */
.achievements { background-color: var(--background-color); }
.achievements-grid { display: grid; grid-template-columns: 1fr; gap: var(--spacing-xl); max-width: 900px; margin: 0 auto; }
.achievement-card { display: flex; align-items: flex-start; gap: var(--spacing-lg); background-color: var(--surface-color); padding: var(--spacing-lg); border-radius: var(--radius-lg); border: 1px solid var(--border-color); text-align: left; transition: all var(--transition-fast) var(--ease-out); }
.achievement-card:hover { transform: translateY(-5px); box-shadow: 0 8px 25px var(--shadow-color-hover); border-color: rgba(var(--primary-color), 0.5); }
.achievement-icon { flex-shrink: 0; width: 50px; height: 50px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: var(--primary-color); background-color: rgba(var(--primary-color), 0.1); border-radius: var(--radius-md); margin: 0; }
.achievement-card div:not(.achievement-icon) { flex-grow: 1; }
.achievement-card h3 { margin-bottom: var(--spacing-sm); }
.achievement-card p { margin-bottom: var(--spacing-md); }
.achievement-category { display: inline-block; padding: var(--spacing-xs) var(--spacing-sm); font-size: 0.75rem; font-weight: 600; border-radius: var(--radius-sm); color: var(--primary-color); background-color: rgba(var(--primary-color), 0.1); }
.achievement-category.competition { color: #f59e0b; background-color: rgba(245, 158, 11, 0.1); }
.achievement-category.academic,
.achievement-category.international { color: #10b981; background-color: rgba(16, 185, 129, 0.1); }


/* Personal Details Section */
.personal { background-color: var(--surface-color); }
.personal-content { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--spacing-lg); }
.personal-card { background-color: var(--background-color); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: var(--spacing-lg); }
.personal-card h3 { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-md); }
.personal-card h3 i { color: var(--primary-color); font-size: 1.5rem; width: 24px; text-align: center; }
.language-tag { display: inline-block; padding: var(--spacing-xs) var(--spacing-md); background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--radius-md); font-size: 0.9rem; }
.language-list { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); }
.hobby-item, .fact-item { font-size: 1rem; color: var(--text-secondary-color); }


/* Contact Section */
.contact-content { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--spacing-xxl); align-items: center; }
.contact-form { background-color: var(--surface-color); padding: var(--spacing-xl); border-radius: var(--radius-lg); border: 1px solid var(--border-color); }
.form-group { margin-bottom: var(--spacing-md); }
.form-label { display: block; margin-bottom: var(--spacing-sm); font-weight: 500; font-size: 0.9rem; }
.form-control { display: block; width: 100%; padding: 12px var(--spacing-md); font-size: 1rem; font-family: var(--font-sans); color: var(--text-color); background-color: var(--background-color); border: 1px solid var(--border-color); border-radius: var(--radius-md); transition: all var(--transition-fast) var(--ease-out); }
.form-control:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(var(--primary-color), 0.2); }
textarea.form-control { resize: vertical; min-height: 120px; }

/* Footer */
.footer { padding: var(--spacing-xl) 0; text-align: center; border-top: 1px solid var(--border-color); background-color: var(--surface-color); }
.footer p { color: var(--text-secondary-color); margin: 0; font-size: 0.9rem; }

/* Animations */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out); }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.loading { display: inline-block; width: 20px; height: 20px; border: 3px solid rgba(var(--primary-color), 0.3); border-radius: 50%; border-top-color: var(--primary-color); animation: form-spin 1s ease-in-out infinite; }
@keyframes form-spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 991px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-text { order: 2; }
  .hero-image { order: 1; margin-bottom: var(--spacing-xl); }
  .hero-buttons, .social-links { justify-content: center; }
  .contact-content { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { position: fixed; top: 72px; left: -100%; width: 100%; height: calc(100vh - 72px); background-color: var(--surface-color); flex-direction: column; align-items: center; padding-top: var(--spacing-xl); transition: left var(--transition-slow) var(--ease-out); }
  .nav-menu.active { left: 0; }
  .hamburger { display: flex; flex-direction: column; gap: 5px; cursor: pointer; }
  .hamburger span { width: 25px; height: 2px; background: var(--text-color); transition: all var(--transition-slow) var(--ease-out); border-radius: var(--radius-sm); }
  .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.active span:nth-child(2) { opacity: 0; }
  .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  
  .timeline::after { left: var(--spacing-lg); }
  .timeline-item, .timeline-item:nth-child(even) { width: 100%; padding-left: var(--spacing-xxl); padding-right: 0; left: 0; }
  .timeline-dot, .timeline-item:nth-child(even) .timeline-dot { left: calc(var(--spacing-lg) - 8px); }
  
  .achievement-card { flex-direction: column; }
}
@media (max-width: 576px) {
  .about-stats { grid-template-columns: 1fr; }
}

/* Hackathon Gallery */
.hackathon-gallery {
  background-color: var(--surface-color);
  padding: var(--spacing-xxl) 0;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  max-width: 1000px;
  margin: 0 auto;
}

.gallery-item {
  background: var(--background-color);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: 0 4px 15px var(--shadow-color);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gallery-item img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  display: block;
}

.caption {
  padding: var(--spacing-md);
  font-size: 1rem;
  color: var(--text-secondary-color);
  text-align: center;
  background: var(--surface-color);
}