/* -------------------------------
   Base Reset & Background
--------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  padding: 1.25rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: white;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-size: cover;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

/* --------------------------------------------
   Liquid Glass Effect
--------------------------------------------- */
.glass {
  position: relative;
  background: rgba(255, 255, 255, 0.15);
  -webkit-backdrop-filter: blur(2px) saturate(180%); /* Added for Safari compatibility */
  backdrop-filter: blur(2px) saturate(180%);
  border: 0.0625rem solid rgba(255, 255, 255, 0.8);
  border-radius: 2rem;
  padding: 1.25rem;
  box-shadow: 0 8px 32px rgba(31, 38, 135, 0.2), inset 0 4px 20px rgba(255, 255, 255, 0.3);
}

.glass::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2rem;
  -webkit-backdrop-filter: blur(1px); /* Added for Safari compatibility */
  backdrop-filter: blur(1px);
  box-shadow: inset -10px -8px 0px -11px rgba(255, 255, 255, 1),
    inset 0px -9px 0px -8px rgba(255, 255, 255, 1);
  opacity: 0.6;
  z-index: -1;
  filter: blur(1px) drop-shadow(10px 4px 6px black) brightness(115%);
  pointer-events: none;
}

/* -------------------------------
   Header & Navigation
--------------------------------- */
header {
  width: 100%;
  text-align: center;
  margin-bottom: 1.25rem;
}

nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding: 1em;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 1rem;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
}

nav a:hover {
  color: rgba(255, 255, 255, 0.85);
  transform: scale(1.05);
}


 /* -------------------------------
   Footer
--------------------------------- */
footer {
  width: 100%;
  text-align: center;
  padding: 1em;
  margin-top: 2rem;
  color: white;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 1rem;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}


  .project-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr); /* Exactly 4 columns */
  gap: 20px;
}

/* Universal Flipping Card CSS */

/* Flip Card Container */
.flip-card {
  width: 100%;
  max-width: 600px;
  height: 400px;
  perspective: 1000px;
  margin: 1em auto;
}

/* Flip Inner Wrapper */
.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

/* Apply flip on hover */
.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}

/* Front and Back Sides */
.flip-card-front,
.flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* Front Side */
.flip-card-front {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #fff;
}

.flip-card-front img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  margin: 1em;
  display: block;
  object-fit: contain;
}

/* Back Side */
.flip-card-back {
  background-color: #ffffff;
  color: #1a252f;
  transform: rotateY(180deg);
  padding: 1em;
  text-align: left;
  font-size: 0.95em;
  overflow-y: auto;
}

/* Container for the Hardware Test Project*/
.project-boxHWT {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

/* Container for the Activation Wonderland */
.project-boxACT {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

/* Project WUSHU CSS */
.project-boxWU {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

/* Project Nail News CSS */
.project-boxNN {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

/* Project Custom Kernel CSS */

.project-boxCK {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

/* Project Black Jack Game CSS */

.project-boxBlackjack{
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

/* Project Connect4 CSS */

.project-boxConnect4{
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
} 

/* Project Hoa Su CSS */

.project-boxHS {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
} 

.project-boxSG {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 2.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
} 

/* Container for the iPXE */
.project-boxiPxe {
 background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 1.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;

}
.project-boxiPxe h3 {
  margin-top: 0;
  margin-bottom: 0.5em;
  color: #1a252f;
}

.project-boxiPxe ul {
  padding-left: 1.2em;
  margin: 0;
}

.project-boxiPxe li {
  margin-bottom: 0.5em;
  text-align: left;
  font-size: 0.95em;
  color: #1a252f;
}

/* Project GP CSS */
.project-boxGP {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 1.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

.project-boxGP h3 {
  margin-top: 0;
  margin-bottom: 0.5em;
  color: #1a252f;
}

.project-boxGP ul {
  padding-left: 1.2em;
  margin: 0;
}

.project-boxGP li {
  margin-bottom: 0.5em;
  text-align: left;
  font-size: 0.95em;
  color: #1a252f;
}

/* Project GP CSS */
.project-boxVH {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 1.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

.project-boxVH h3 {
  margin-top: 0;
  margin-bottom: 0.5em;
  color: #1a252f;
}

.project-boxVH ul {
  padding-left: 1.2em;
  margin: 0;
}

.project-boxVH li {
  margin-bottom: 0.5em;
  text-align: left;
  font-size: 0.95em;
  color: #1a252f;
}


/* Project F3D CSS */
.project-boxF3D {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 1.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

.project-boxF3D h3 {
  margin-top: 0;
  margin-bottom: 0.5em;
  color: #1a252f;
}

.project-boxF3D ul {
  padding-left: 1.2em;
  margin: 0;
}

.project-boxF3D li {
  margin-bottom: 0.5em;
  text-align: left;
  font-size: 0.95em;
  color: #1a252f;
}


/* Project GH CSS */
.project-boxGH {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 1.5em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-weight: bold;
}

.project-boxGH h3 {
  margin-top: 0;
  margin-bottom: 0.5em;
  color: #1a252f;
}

.project-boxGH ul {
  padding-left: 1.2em;
  margin: 0;
}

.project-boxGH li {
  margin-bottom: 0.5em;
  text-align: left;
  font-size: 0.95em;
  color: #1a252f;
}


/* Flip Card Container */
.flip-cardNN {
  width: 100%;
  max-width: 400px;
  height: 400px;
  perspective: 1000px;
  margin: 1em auto;
}

/* Flip Inner Wrapper */
.flip-card-innerNN {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

/* Apply flip on hover */
.flip-cardNN:hover .flip-card-innerNN {
  transform: rotateY(180deg);
}

/* Front and Back Sides */
.flip-card-frontNN,
.flip-card-backNN {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* Flip Card Front - Flex Layout */
.flip-card-frontNN {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  background-color: #fff;
  padding: 1em;
  gap: 0.75em; /* smaller gap between images */
}

/* Project Images - Smaller and Uniform */
.project-imageNN {
  width: 40%; /* fits 2 per row comfortably */
  max-width: 180px; /* limit maximum size */
  aspect-ratio: 1 / 1; /* makes them square */
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Back Side Styling */
.flip-card-backNN {
  background-color: #ffffff;
  color: #1a252f;
  transform: rotateY(180deg);
  padding: 1em;
  text-align: left;
  font-size: 0.95em;
  overflow-y: auto;
}


/* Flip Card Container */
.flip-cardCK {
  width: 100%;
  max-width: 400px;
  height: 400px;
  perspective: 1000px;
  margin: 1em auto;
}

/* Flip Inner Wrapper */
.flip-card-innerCK {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

/* Apply flip on hover */
.flip-cardCK:hover .flip-card-innerCK {
  transform: rotateY(180deg);
}

/* Front and Back Sides */
.flip-card-frontCK,
.flip-card-backCK {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* Flip Card Front - Flex Layout */
.flip-card-frontCK {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  background-color: #fff;
  padding: 1em;
  gap: 0.75em; /* smaller gap between images */
}

/* Project Images - Smaller and Uniform */
.project-imageCK {
  width: 40%; /* fits 2 per row comfortably */
  max-width: 180px; /* limit maximum size */
  aspect-ratio: 1 / 1; /* makes them square */
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Back Side Styling */
.flip-card-backCK {
  background-color: #ffffff;
  color: #1a252f;
  transform: rotateY(180deg);
  padding: 1em;
  text-align: left;
  font-size: 0.95em;
  overflow-y: auto;
}


/* Project BlackJack CSS */

/* Flip Card Container */
.flip-cardBlackjack {
  width: 100%;
  max-width: 400px;
  height: 400px;
  perspective: 1000px;
  margin: 1em auto;
}

/* Flip Inner Wrapper */
.flip-card-innerBlackjack {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

/* Apply flip on hover */
.flip-cardBlackjack:hover .flip-card-innerBlackjack {
  transform: rotateY(180deg);
}

/* Front and Back Sides */
.flip-card-frontBlackjack,
.flip-card-backBlackjack {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* Flip Card Front - Flex Layout */
.flip-card-frontBlackjack {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  background-color: #fff;
  padding: 1em;
  gap: 0.75em; /* smaller gap between images */
}

/* Project Images - Smaller and Uniform */
.project-imageBlackjack {
  width: 40%; /* fits 2 per row comfortably */
  max-width: 180px; /* limit maximum size */
  aspect-ratio: 1 / 1; /* makes them square */
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Back Side Styling */
.flip-card-backBlackjack {
  background-color: #ffffff;
  color: #1a252f;
  transform: rotateY(180deg);
  padding: 1em;
  text-align: left;
  font-size: 0.95em;
  overflow-y: auto;
}

/* Project Connect4WH CSS */


/* Flip Card Container for Connect 4 */
.flip-cardConnect4 {
  width: 100%;
  max-width: 400px;
  height: 400px;
  perspective: 1000px;
  margin: 1em auto;
}

.flip-card-innerConnect4 {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.flip-cardConnect4:hover .flip-card-innerConnect4 {
  transform: rotateY(180deg);
}

.flip-card-frontConnect4,
.flip-card-backConnect4 {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.flip-card-frontConnect4 {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #fff;
  padding: 1em;
}

.flip-card-backConnect4 {
  background-color: #ffffff;
  color: #1a252f;
  transform: rotateY(180deg);
  padding: 1em;
  text-align: left;
  font-size: 0.95em;
  overflow-y: auto;
}

.project-imageConnect4 {
  width: 90%;
  max-width: 350px;
  aspect-ratio: 1.5 / 1; /* adjust if the GIF isn't square */
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  margin-top: 1em;
}