/* Reset and global styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  transition: background 0.3s, color 0.3s;
}

/* CSS variables for light and dark themes */
:root {
  --color-bg: #f5f7ff;
  --color-text: #0f172a;
  --color-card-bg: rgba(255, 255, 255, 0.72);
  --color-card-bg-solid: rgba(255, 255, 255, 0.88);
  --color-card-border: rgba(15, 23, 42, 0.08);
  --color-accent: #6366f1;
  --color-primary-gradient-start: #a855f7;
  --color-primary-gradient-end: #60a5fa;
  --color-button-text: #ffffff;
  --color-input-bg: rgba(255, 255, 255, 0.85);
  --color-input-border: rgba(15, 23, 42, 0.08);
  --color-grid-line: rgba(99, 102, 241, 0.12);
  --color-scroll-indicator-border: rgba(99, 102, 241, 0.35);
  --color-surface-muted: rgba(15, 23, 42, 0.06);
  --color-skill-gradient-start: rgba(168, 85, 247, 0.18);
  --color-skill-gradient-end: rgba(96, 165, 250, 0.18);
  --color-skill-border: rgba(99, 102, 241, 0.18);
}

.dark {
  --color-bg: #080d1f;
  --color-text: #e2e8f0;
  --color-card-bg: rgba(14, 20, 40, 0.75);
  --color-card-bg-solid: rgba(14, 20, 40, 0.9);
  --color-card-border: rgba(148, 163, 184, 0.12);
  --color-input-bg: rgba(14, 20, 40, 0.85);
  --color-input-border: rgba(148, 163, 184, 0.16);
  --color-grid-line: rgba(79, 112, 255, 0.18);
  --color-scroll-indicator-border: rgba(148, 163, 184, 0.5);
  --color-surface-muted: rgba(148, 163, 184, 0.08);
  --color-skill-gradient-start: rgba(139, 92, 246, 0.18);
  --color-skill-gradient-end: rgba(59, 130, 246, 0.18);
  --color-skill-border: rgba(148, 163, 184, 0.2);
}

/* Background grid overlay */
.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background-image: linear-gradient(
      to right,
      var(--color-grid-line) 1px,
      transparent 1px
    ),
    linear-gradient(
      to bottom,
      var(--color-grid-line) 1px,
      transparent 1px
    );
  background-size: 50px 50px;
}

/* Colored glows */
.purple-glow, .blue-glow {
  position: fixed;
  width: 24rem;
  height: 24rem;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: -2;
}

.purple-glow {
  top: -6rem;
  left: -6rem;
  background: rgba(168, 85, 247, 0.28);
}

.blue-glow {
  bottom: -6rem;
  right: -6rem;
  background: rgba(96, 165, 250, 0.28);
}

/* Container class for layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Navbar styling */
.navbar {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 120;
  backdrop-filter: blur(18px);
  background: rgba(250, 252, 255, 0.75);
  border-bottom: 1px solid rgba(99, 102, 241, 0.08);
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.dark .navbar {
  background: rgba(10, 15, 30, 0.78);
  border-bottom: 1px solid rgba(148, 163, 184, 0.16);
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 0.85rem 1.5rem;
  position: relative;
}
.nav-links-wrapper {
  flex: 1;
  display: flex;
  justify-content: center;
}
.nav-links {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0.3rem;
  border-radius: 9999px;
  background: rgba(148, 163, 184, 0.16);
  border: 1px solid rgba(148, 163, 184, 0.12);
  backdrop-filter: blur(12px);
}
.nav-links li {
  display: flex;
}
.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.45rem 1rem;
  border-radius: 9999px;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
}
.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(99, 102, 241, 0.18);
  color: var(--color-accent);
  box-shadow: 0 8px 18px rgba(99, 102, 241, 0.15);
}
.nav-links a.active {
  background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
  color: #ffffff;
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.28);
}

/* Theme toggle button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(148, 163, 184, 0.24);
  background: rgba(255, 255, 255, 0.8);
  color: var(--color-text);
  font-size: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.85rem;
  cursor: pointer;
  transition: transform 0.2s, border 0.2s, box-shadow 0.2s, background 0.2s;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.15);
}
.dark .theme-toggle {
  background: rgba(15, 23, 42, 0.9);
  border-color: rgba(148, 163, 184, 0.24);
}
.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: translateY(-2px);
  border-color: var(--color-primary-gradient-start);
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.25);
}
.theme-icon {
  width: 1.2rem;
  height: 1.2rem;
  display: block;
}

/* Hero section */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  text-align: left;
  padding-top: 4rem;
  position: relative;
}
.hero-intro {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}
.highlight {
  font-weight: 600;
  color: var(--color-accent);
}
.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.gradient-text {
  background-image: linear-gradient(90deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}
.hero-description {
  max-width: 600px;
  margin-bottom: 2rem;
  color: var(--color-text);
}
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.3s, transform 0.2s;
}
.btn.primary {
  background-image: linear-gradient(90deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
  color: var(--color-button-text);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}
.btn.primary:hover {
  transform: translateY(-3px);
}
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}
.scroll-indicator a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  border: 2px solid var(--color-scroll-indicator-border);
  border-radius: 9999px;
  color: var(--color-text);
  background: var(--color-card-bg);
  backdrop-filter: blur(10px);
  transition: background 0.2s, transform 0.2s;
  animation: scroll-bounce 1.8s infinite;
}
.scroll-indicator a:hover {
  background: var(--color-primary-gradient-start);
  color: #ffffff;
  transform: translateY(-4px);
  animation-play-state: paused;
}
.scroll-indicator svg {
  width: 1.25rem;
  height: 1.25rem;
  display: block;
}

@keyframes scroll-bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(8px);
  }
  60% {
    transform: translateY(4px);
  }
}

@media (max-width: 768px) {
  .navbar-inner {
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
  }
  .nav-links-wrapper {
    justify-content: center;
  }
  .nav-links {
    gap: 0.35rem;
    overflow-x: auto;
    padding: 0.25rem;
  }
  .nav-links a {
    padding: 0.4rem 0.75rem;
    font-size: 0.875rem;
  }
  .theme-toggle {
    position: static;
    transform: none;
    top: auto;
    right: auto;
    margin-left: auto;
  }
  .theme-toggle:hover {
    transform: translateY(-2px);
  }
}

/* Section spacing */
.section {
  padding: 4rem 0;
}
.section-header {
  text-align: center;
  margin-bottom: 2rem;
}
.section-header h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}
.section-header p {
  color: var(--color-text);
  max-width: 700px;
  margin: 0 auto;
  font-weight: 300;
}

/* About grid */
.about-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
@media (min-width: 992px) {
  .about-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-areas:
      "story story education"
      "story story quickfacts"
      "experience experience certifications";
  }
  .story-card { grid-area: story; }
  .education-card { grid-area: education; }
  .quickfacts-card { grid-area: quickfacts; }
  .experience-card { grid-area: experience; }
  .certifications-card { grid-area: certifications; }
}
.about-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.experience-card {
  gap: 1.25rem;
}
.card {
  background: var(--color-card-bg-solid);
  border: 1px solid var(--color-card-border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  backdrop-filter: blur(4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s;
}
.card:hover {
  transform: translateY(-5px);
}
.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}
.card p {
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}
.quick-facts {
  list-style: none;
  padding-left: 0;
  display: grid;
  gap: 0.75rem;
}
.quick-facts li {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  align-items: baseline;
  font-size: 0.9375rem;
  gap: 0.75rem;
}
.quick-facts .fact-label {
  font-weight: 600;
  opacity: 0.75;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.75rem;
}
.quick-facts .fact-value {
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
}
.education-list {
  list-style: none;
  padding-left: 0;
  margin-top: 1rem;
  display: grid;
  gap: 0.75rem;
}
.education-list li {
  font-size: 0.875rem;
  margin-bottom: 0;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 0.75rem;
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.education-list .duration {
  font-size: 0.75rem;
  opacity: 0.7;
}
.education-list li strong {
  font-size: 0.95rem;
}
.education-heading {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.education-heading strong {
  font-weight: 600;
}
.education-meta {
  font-size: 0.8rem;
  opacity: 0.7;
}
.certifications {
  list-style: none;
  padding-left: 0;
  display: grid;
  gap: 0.75rem;
}
.certifications li {
  background: var(--color-card-bg);
  border-radius: 0.65rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-card-border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9375rem;
}
.certifications i {
  color: var(--color-accent);
}
.cert-icon {
  width: 2.25rem;
  height: 2.25rem;
  object-fit: contain;
  flex-shrink: 0;
}
.text-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.85rem;
  background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 10px 24px rgba(99, 102, 241, 0.25);
}
.certifications .cert-text {
  align-items: center;
}
.cert-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}
.cert-link:hover {
  text-decoration: underline;
  color: var(--color-accent);
}
.experience-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.experience-item .position {
  font-style: italic;
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}
.experience-item .dates {
  font-size: 0.75rem;
  color: var(--color-text);
  opacity: 0.7;
  margin-bottom: 0.5rem;
}
.experience-item .exp-description {
  font-size: 0.875rem;
  line-height: 1.4;
}
.experience-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--color-card-bg);
  border-radius: 0.85rem;
  border: 1px solid var(--color-card-border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.experience-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.12);
}
.experience-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--color-accent);
  margin-top: 0.4rem;
  box-shadow: 0 0 0 6px rgba(99, 102, 241, 0.15);
}
.experience-content {
  flex: 1;
}

/* Skills */
.skill-categories {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 0.75rem 1rem;
  background: var(--color-card-bg);
  border-radius: 9999px;
  border: 1px solid var(--color-card-border);
  backdrop-filter: blur(8px);
}
.category-btn {
  border: 1px solid var(--color-card-border);
  background: var(--color-card-bg);
  color: var(--color-text);
  padding: 0.5rem 1.1rem;
  border-radius: 9999px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: background 0.2s, color 0.2s, transform 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.category-btn:hover {
  background: var(--color-primary-gradient-start);
  color: #ffffff;
  transform: translateY(-2px);
}
.category-btn.active {
  background: var(--color-primary-gradient-start);
  color: #ffffff;
  border-color: var(--color-primary-gradient-start);
}
.category-btn i {
  font-size: 1rem;
}
.category-btn span {
  font-weight: 500;
}
.skill-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}
@media (max-width: 640px) {
  .skill-cards {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
}
.skill-set.hidden {
  display: none;
}
.skill-set {
  display: contents;
}
.skill-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-skill-gradient-start), transparent 45%), linear-gradient(315deg, var(--color-skill-gradient-end), transparent 50%), var(--color-card-bg-solid);
  border: 1px solid var(--color-skill-border);
  border-radius: 1rem;
  padding: 1.75rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
}
.skill-card i {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}
.skill-card span {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}
.skill-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(99, 102, 241, 0.22);
  border-color: rgba(99, 102, 241, 0.35);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--color-card-bg-solid);
  border: 1px solid var(--color-card-border);
  border-radius: 0.75rem;
  overflow: hidden;
  padding-bottom: 1.5rem;
  backdrop-filter: blur(4px);
  transition: transform 0.2s;
}
.project-card:hover {
  transform: translateY(-5px);
}
.project-image {
  background: var(--color-surface-muted);
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.project-image > i {
  font-size: 3rem;
  color: var(--color-accent);
}
.project-image a {
  font-size: 1.5rem;
  color: var(--color-accent);
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
}
.project-media {
  display: block;
  background: var(--color-surface-muted);
}
.project-video {
  padding: 0;
  border-top-left-radius: 0.75rem;
  border-top-right-radius: 0.75rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.video-trigger {
  all: unset;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  text-align: center;
}
.video-trigger span {
  font-weight: 600;
  font-size: 0.95rem;
}
.video-trigger:hover {
  transform: translateY(-4px);
  color: var(--color-accent);
}
.video-poster {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
  color: #ffffff;
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.35);
}
.video-trigger svg {
  width: 28px;
  height: 28px;
}
.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1rem;
}
.project-desc {
  font-size: 0.875rem;
  margin: 0 1rem 1rem;
  color: var(--color-text);
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0 1rem;
}
.tag {
  background: var(--color-primary-gradient-start);
  color: #ffffff;
  padding: 0.25rem 0.5rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
}
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0 1rem 0;
  margin-top: 0.75rem;
}
.project-link {
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
}
.project-link:hover {
  text-decoration: underline;
}

/* Contact */
.contact-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.contact-social a {
  color: var(--color-text);
  background: var(--color-card-bg);
  border-radius: 0.85rem;
  width: 3rem;
  height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-card-border);
  transition: transform 0.2s, background 0.2s, color 0.2s, box-shadow 0.2s;
}
.contact-social a:hover {
  transform: translateY(-3px);
  background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(99, 102, 241, 0.25);
}
.contact-icon {
  width: 1.4rem;
  height: 1.4rem;
  fill: currentColor;
}
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-form label {
  font-size: 0.875rem;
  font-weight: 500;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  color: var(--color-text);
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary-gradient-start);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.3);
}
.contact-form button {
  align-self: flex-start;
  cursor: pointer;
}
.contact-note {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.95rem;
  color: var(--color-text);
}
.contact-note a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}
.contact-note a:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem 0;
  font-size: 0.875rem;
  border-top: 1px solid var(--color-card-border);
  color: var(--color-text);
}
.footer .love {
  color: var(--color-accent);
}