/* Utkarsh Panwar — Portfolio Landing Page Styles */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #fafafa;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-accent: #4f46e5;
  --color-accent-hover: #4338ca;
  --color-border: #e5e7eb;
  --radius: 8px;
  --nav-height: 64px;
  --max-width: 1100px;
  --transition-fast: 0.2s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

h1, h2, h3 {
  margin: 0 0 0.5em;
  line-height: 1.2;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-link {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

/* Hero */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
}

.avatar-placeholder {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--color-border);
  margin-bottom: 16px;
}

.title-accent {
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 8px;
}

.tagline {
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 0 24px;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14px;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn-secondary:hover {
  background: var(--color-accent);
  color: #ffffff;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-link {
  font-size: 13px;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.social-link:hover {
  color: var(--color-accent);
}

/* Sections (shared) */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.section-alt {
  background: var(--color-bg-alt);
  max-width: none;
}

.section-alt > * {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

/* About */
.about-bio {
  max-width: 640px;
  color: var(--color-text-muted);
}

.quick-facts {
  display: flex;
  gap: 40px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.fact {
  display: flex;
  flex-direction: column;
}

.fact-number {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
}

.fact-label {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* Skills */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.skill-badge {
  padding: 8px 16px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 500;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.skill-badge:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  background: #ffffff;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.project-card:hover {
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.08);
  transform: translateY(-2px);
}

.project-card p {
  color: var(--color-text-muted);
  font-size: 14px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.tech-tags span {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
}

.project-links {
  display: flex;
  gap: 16px;
  font-size: 14px;
  font-weight: 600;
}

/* Contact */
.contact-intro {
  color: var(--color-text-muted);
}

.contact-links {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.contact-secondary {
  font-weight: 600;
  font-size: 14px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 24px;
  color: var(--color-text-muted);
  font-size: 13px;
  border-top: 1px solid var(--color-border);
}

/* Fade-in animation (activated via .visible class from script.js) */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Responsive breakpoints */
@media (max-width: 768px) {
  .nav-links {
    gap: 14px;
  }

  .nav-link {
    font-size: 13px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .quick-facts {
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 16px;
  }

  .nav-logo {
    font-size: 14px;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 240px;
  }

  .section {
    padding: 56px 16px;
  }
}