:root {
  --bg-main: #0f172a;
  --bg-card: #1a1f2e;
  --text-primary: #e5e7eb;
  --text-heading: #ffffff;
  --text-muted: #9ca3af;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #2a3040;
  --green: #64ffda;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  margin: 0;
  overflow-x: hidden;
}

body.light-mode {
  --bg-main: #ffffff;
  --bg-card: #f4f4f4;
  --text-primary: #1a1a1a;
  --text-heading: #000000;
  --text-muted: #555555;
  --border: #dddddd;
  --green: #2563eb; /* switches every green element to blue in light mode */
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.theme {
  margin-top: 20px;
}

.theme .item {
  cursor: pointer;
}

header {
  display: flex;
  justify-content: space-between;
  gap: 3rem;
  align-items: center;
  padding: 1rem 2rem;
}

.nav {
  display: flex;
  gap: 3rem;
  align-items: center;
  justify-content: flex-end;
}

.nav p {
  cursor: pointer;
}

.nav p:hover {
  color: var(--green);
  transition: all 0.3s ease-in-out;
}

.nav p.active {
  color: var(--green);
}

.cwh {
  color: var(--green);
}

.resume-btn {
  background-color: var(--bg-main);
  color: var(--green);
  border: solid 1px var(--green);
  padding: 0.7rem 1.2rem;
  border-radius: 5px;
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 20;
  text-decoration: none;
  cursor: pointer;
  margin-right: 10px;
}

.resume-btn:hover {
  background-color: var(--green);
  color: var(--bg-main);
  transition: all 0.3s ease-in-out;
}

.h-s {
  font-size: 20px;
  text-align: center;
}

.intro0 {
  padding: 1rem 2rem;
  margin-bottom: 1.5rem;
}

.intro1 {
  color: var(--green);
  display: block;
}

.intro1 .wave-emoji {
  display: inline-block;
  animation: wave 1.2s infinite ease-in-out;
  transform-origin: 70% 70%;
}

.intro1 .wave-emoji:hover {
  animation: wave 0.8s infinite ease-in-out;
}

@keyframes wave {
  0%, 100% {
    transform: rotate(0deg);
  }
  20% {
    transform: rotate(-12deg);
  }
  40% {
    transform: rotate(16deg);
  }
  60% {
    transform: rotate(-8deg);
  }
  80% {
    transform: rotate(10deg);
  }
}

.intro2 {
  font-weight: 800;
  font-size: 2rem;
}

.intro-story {
  color: var(--text-muted);
  font-size: 1rem;
  padding: 0.5rem 2rem;
  display: block;
}

.about {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem 2rem;
}

.about-me {
  color: var(--text-muted);
  font-size: 1rem;
  padding: 0.5rem 2rem;
  display: flex;
  max-width: 550px;
}

.about-img {
  width: 280px;
  height: 350px;
  object-fit: cover;
  border-radius: 8px;
  filter: grayscale(100%);
  transform: translateX(0);
  transition: filter 0.4s ease-in-out, transform 0.4s ease-in-out;
}

.about-img:hover {
  filter: grayscale(0%);
  transform: translateX(-10px);
}

.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1.2rem;
  padding: 1rem 2rem;
  max-width: 600px;
  margin: 0 auto;
}

.skills div {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem;
  background-color: var(--bg-card);
  border-radius: 10px;
  transition: all 0.3s ease-in-out;
}

.skills div:hover {
  transform: translateY(-5px);
  box-shadow: var(--green) 0px 4px 15px;
  border-color: var(--green);
}

.skills ion-icon {
  font-size: 32px;
  color: var(--green);
}

.personal-website a {
  color: var(--text-heading);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.personal-website p {
  color: var(--text-muted);
  margin: 0.8rem 0;
}

.personal-website button {
  background-color: transparent;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 0.4rem 0.9rem;
  border-radius: 5px;
  font-size: 0.85rem;
  margin-right: 0.5rem;
}

.button-wrapper {
  display: flex;
  justify-content: center;
  padding: 2rem 0;
}

.sayhello-btn {
  background-color: var(--bg-main);
  border: 1px solid var(--green);
  padding: 0.8rem 1.5rem;
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.btn-text-wrap {
  display: flex;
  justify-content: center;
  position: relative;
  height: 1.2em;
  overflow: hidden;
}

.btn-text {
  display: block;
  color: var(--text-primary);
  transition: transform 0.3s ease-in-out;
}

.btn-text-alt {
  position: absolute;
  top: 100%;
  left: 0;
  color: var(--green);
}

.sayhello-btn:hover .btn-text {
  transform: translateY(-100%);
}

.sayhello-btn:hover .btn-text-alt {
  transform: translateY(-100%);
}

.what-next {
  text-align: center;
  color: var(--green);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.get-in-touch {
  text-align: center;
  font-weight: 600;
  font-size: 1.8rem;
  color: var(--text-heading);
}

.footer {
  margin-top: 4rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 1.5rem 0;
}

.footer-year {
  display: block;
  margin-top: 0.3rem;
}

.footer:hover {
  color: var(--green);
}

.side-icons {
  position: fixed;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  z-index: 10;
}

.left-icons {
  left: 2rem;
}

.right-email {
  right: 2rem;
  gap: 1.8rem;
}

.side-icons a:not(.email-link) {
  color: var(--text-muted);
  font-size: 1.3rem;
  transition: all 0.3s ease-in-out;
}

.side-icons a:not(.email-link):hover {
  color: var(--green);
  transform: translateY(-3px);
}

.side-line {
  width: 1px;
  height: 90px;
  background-color: var(--text-muted);
  flex-shrink: 0;
}

.email-link {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.7rem;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.email-link:hover {
  color: var(--green);
}

/* ============================
   RESPONSIVE DESIGN
============================ */

@media (max-width: 768px) {
  .side-icons {
    display: none;
  }

  .about {
    flex-direction: column;
    padding: 2rem 1.5rem;
  }

  .about-img {
    width: 100%;
    max-width: 280px;
    height: auto;
    margin: 0 auto;
  }

  .about-me {
    max-width: 100%;
    padding: 0.5rem 0;
  }
}

@media (max-width: 480px) {
  .container {
    max-width: 100%;
    padding: 0 1rem;
  }

  header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .intro0 {
    padding: 1rem;
  }

  .intro2 {
    font-size: 1.5rem;
  }

  .intro-story {
    padding: 0.5rem 0;
  }

  .about {
    padding: 1.5rem 1rem;
  }

  .about-img {
    max-width: 220px;
  }

  .h-s {
    font-size: 1.2rem;
  }

  .skills {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
    padding: 1rem;
    max-width: 100%;
  }

  .get-in-touch {
    font-size: 1.4rem;
  }

  .footer {
    padding: 1rem 0.5rem;
    font-size: 0.75rem;
  }
}