html {
  scroll-behavior: smooth;
  color-scheme: light;
}

:root {
  --bg: #f5f7fa;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --text: #2e2e2e;
  --accent: #4ecdc4;
  --accent-hover: #2a9d8f;
  --header-height: 4rem;
  --peek-size: 7rem;
  --glow-color: rgba(78, 205, 196, 0.15);
  --glow-size: 30vw;
  --drift-speed: 0.2;
}

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

body {
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e7ec 100%);
  color: var(--text);
  font-family: "Montserrat", sans-serif;
  line-height: 1.5;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--nav-bg);
  backdrop-filter: blur(6px);
  z-index: 1000;
  height: var(--header-height);
}

header nav {
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
  width: 100%;
  z-index: 1000;
}

.nav-logo img {
  height: 2.5rem;
  display: block;
}

nav ul {
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

nav ul li {
  margin: 0;
}

nav ul li a {
  text-decoration: none;
  color: var(--text);
  transition: color 0.3s;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

nav ul li a:hover {
  color: var(--accent);
}

.glow {
  position: fixed;
  width: var(--glow-size);
  height: var(--glow-size);
  pointer-events: none;
  background: radial-gradient(circle, var(--glow-color) 0%, transparent 80%);
  will-change: transform;
  z-index: -1;
}

.glow-left {
  top: var(--header-height);
  left: 0;
}

.glow-right {
  bottom: var(--header-height);
  right: 0;
}

main {
  padding-top: var(--header-height);
}

.intro-container {
  margin-top: 0;
  height: calc(100vh - var(--header-height) - var(--peek-size));
  display: grid;
  align-items: center;
  justify-content: center;
  grid-template-columns: 1.6fr 1fr;
  gap: 2.5rem;
  max-width: 1200px;
  width: 100%;
  padding: 0 2rem;
  margin-left: auto;
  margin-right: auto;
}

.nowrap {
  white-space: nowrap;
}

.intro-left,
.intro-right {
  opacity: 0;
  transform: translateX(0);
}

.intro-left {
  animation: slideInFromLeft 1s ease-out forwards;
}

.intro-right {
  animation: slideInFromRight 1s ease-out 0.5s forwards;
}

.intro-left h1 {
  font-size: 5.33rem;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.description {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  max-width: 500px;
}

.sub-tagline {
  font-size: 0.9rem;
  color: rgba(46, 46, 46, 0.7);
  margin-top: 0.5rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border-radius: 24px;
  transition: background 0.3s;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn-outline {
  display: inline-block;
  margin: 2rem auto 0;
  padding: 0.75rem 1.5rem;
  color: var(--accent);
  border: 2px solid var(--accent);
  background: transparent;
  border-radius: 24px;
  transition:
    background 0.3s,
    color 0.3s;
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

.profile-container {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
}

.profile-large {
  display: block;
  width: 100%;
  max-width: 533px;
  border-radius: 16px;
  position: relative;
  z-index: 2;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
  margin: 0 auto;
}

.profile-shadow {
  position: absolute;
  bottom: -10px;
  right: -10px;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.1);
  filter: blur(20px);
  border-radius: 16px;
  z-index: 1;
}

.social-links {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
}

.social-links a img {
  width: 24px;
  height: 24px;
  transition:
    transform 0.2s,
    opacity 0.2s;
}

.social-links a:hover img {
  transform: scale(1.2);
  opacity: 0.8;
}

@media (max-width: 768px) {
  :root {
    --glow-size: 50vw;
    --glow-color: rgba(78, 205, 196, 0.2);
  }
  .projects-grid {
    margin-top: 0 !important;
    padding-top: 0 !important;
  }

  .glow-left {
    top: calc(var(--header-height) + 1rem);
  }
  .glow-right {
    bottom: calc(var(--header-height) + 1rem);
  }
  .intro-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
    height: auto !important;
    margin-bottom: 2rem; /* space between hero and projects */
  }
  .intro-right {
    order: -1;
  }
  .profile-large {
    width: 80vw; /* fluid width */
    max-width: none; /* override desktop max */
    margin: 0 auto 1.5rem;
  }

  .intro-left h1 {
    font-size: 3rem;
  }

  .description {
    font-size: 1.125rem;
  }
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.875rem;
  color: #777;
}

.projects-grid {
  margin-top: calc(var(--peek-size) * -1);
  padding-top: var(--peek-size);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 2rem;
  padding-right: 2rem;
  text-align: center;
}

.projects-grid h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(2, minmax(250px, 1fr));
  gap: 2rem;
  padding: 0 2rem;
}

@media (max-width: 768px) {
  .grid-container {
    grid-template-columns: 1fr;
  }
}

.project-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  text-align: left;
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.6s ease-out,
    transform 0.6s ease-out;
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.project-card img {
  width: 100%;
  display: block;
  margin: 0 auto 1rem;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.project-card h3 {
  font-size: 1.25rem;
  margin: 0 1rem 1rem;
}

.project-card p {
  margin: 0 1rem 1rem;
  color: #555;
}

.project-card a {
  display: block;
  margin: 0 1rem 1rem;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.project-card a:hover {
  text-decoration: underline;
}

@media (max-width: 500px) {
  .project-card {
    text-align: center;
  }
}

/* hide cards from #3 onward */
#featured-projects .project-card:nth-child(n + 3) {
  display: none;
}

/* when .show-all is toggled, show everything */
#featured-projects.show-all .project-card {
  display: block;
}

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideDownFade {
  from {
    opacity: 0;
    transform: translateY(-40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.contact-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-evenly;
  text-align: center;
  padding: 2rem;
  min-height: calc(100vh - var(--header-height));

  opacity: 0;
  transform: translateY(-40px);
  animation: slideDownFade 0.8s ease-out forwards;
}

.contact-container section > * + * {
  margin-top: 1.5rem;
}

.contact-container h1 {
  font-size: 4rem;
}

/* ABOUT PAGE LAYOUT */
.about-container {
  padding: calc(var(--header-height) + 2rem) 2rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.about-section-left,
.about-section-right {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  align-items: center;
  gap: 2rem;
  opacity: 0;
}

/* IMAGE STYLING */
.about-img {
  width: 100%;
  max-width: 400px;
  border-radius: 12px;
}

/* INITIAL OFFSETS & TRANSITIONS */
.about-section-left {
  transform: translateX(-50px);
  transition:
    opacity 0.6s ease-out,
    transform 0.6s ease-out;
}

.about-section-right {
  transform: translateX(50px);
  transition:
    opacity 0.6s ease-out,
    transform 0.6s ease-out;
}

/* VISIBLE STATE */
.about-section-left.visible,
.about-section-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.about-img {
  width: 100%;
  max-width: 600px;
  aspect-ratio: 4 / 3; /* keeps a 4:3 ratio automatically */
  object-fit: cover;
  border-radius: 12px;
  display: block;
  margin: 0 auto;
}

/* MOBILE ADJUSTMENTS */
@media (max-width: 768px) {
  .about-container {
    gap: 3rem;
  }
  .about-section-left,
  .about-section-right {
    grid-template-columns: 1fr;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }
  .about-section-right {
    flex-direction: column-reverse;
  }
}

#loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff; /* or your background gradient */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000; /* above all other content */
  opacity: 1;
  transition: opacity 0.5s ease;
  pointer-events: all;
}

#loading-screen.loaded {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 5px solid #eee;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}