@import url('https://fonts.googleapis.com/css2?family=Lora:wght@400;700&display=swap');

/* :root {
  --homepage-bg: #f8f9fa;
  --accent: #a295f6;
  --highlight: darkred;
  --scrollbar-color-thumb: rgb(233, 102, 200);
}
/* property: var(--variable-name, fallback-value); */
/* .dark {
  --bg-color: #111;
  --text-color: #eee;
  --accent-color: #9aa0ff;
} */ 

:root {
  --bg-color: #ffffff;        
  --text-color: #111111;     
  --accent-color: #a295f6;    
  --homepage-bg: #f8f9fa;
  --highlight: darkred;
  --scrollbar-color-thumb: rgb(233, 102, 200);
   --card-bg: white;
  --card-border: #ddd;
  --card-text: #333;
  --article-bg: color-mix(in srgb, var(--homepage-bg, #f8f9fa) 85%, white);
}

/* Dark theme */
.dark {
  --homepage-bg: #15212e;
  --bg-color: #111111;
  --text-color: #eeeeee;
  --accent-color: #cccee1;
  --card-bg: #434141;
  --card-border: #555;
  --card-text: #ddd;
  --highlight: rgb(234, 224, 224);
  --article-bg: color-mix(in srgb, var(--homepage-bg, #5d656d) 55%, rgb(90, 90, 127));
}

/* Applies variables */
body {
  background: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  font-family: 'Lora', serif;
}

html, body {
  max-width: 100%;
  overflow-x: hidden; /* incase of overflow */
}

.page {
  display: grid;
  grid-template-areas:
    "header"
    "main"
    "footer";
  grid-template-rows: auto 1fr auto;
  min-height: 100dvh;
  margin: 0;
}

nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1rem;
}

/* nav a {
  text-decoration: none;
  color: #dce9ef;
  font-weight: bold;
}

nav a:hover {
  color: var(--highlight, darkred);            
  background-color: white;    
  border: 1px solid rgb(76, 18, 18);    
  border-radius: 8px;        
  padding: 0.3rem 0.6rem;     
  transition: all 0.3s ease;  
} */
/* Nested css here and meet the 2024 baseline requirements. */

nav a {
  text-decoration: none;
  color: var(--accent, gray);
  font-weight: bold;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.3rem 0.6rem;
  transition: all 0.2s ease;
}
nav a:hover {
  color: var(--highlight, darkred);
  background-color: white;
  border: 1px solid black;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}

/* Baseline 2024 nesting feature (only works in latest browsers) */
@supports (selector(&)) {
  nav {
    a {
      text-decoration: none;
      color: var(--accent, gray);
      font-weight: bold;
      border: 1px solid transparent;
      border-radius: 8px;
      padding: 0.3rem 0.6rem;
      transition: all 0.2s ease;

      &:hover {
        color: var(--highlight, darkred);
        background-color: white;
        border: 1px solid black;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
        transform: translateY(-2px);
      }
    }
  }
}



/* Extra decoration */
body {
  font-family: 'Lora', sans-serif;
  font-size: 18px;
  margin: 0;
  color: var(--accent, #9a97ac); 
  scrollbar-width: thin; 
  scrollbar-color: var(--scrollbar-color-thumb, darkred) #f8f9fa;
  scrollbar-gutter: stable;
}

h1, h2 {
  font-family: 'Lora', serif;
  font-weight: 700; /* Bold 700 weight */ 
}

header{
  background-image: url("images/oceans1.jpg"); 
  background-size: cover;    
  background-position: center; 
  background-repeat: no-repeat; 
  text-align: center;
  color: rgb(238, 239, 244);
  padding: 2rem;
}

/* sRGB is standard RGB */
footer {
  background-color: color-mix(in srgb,  rgb(178, 183, 247)70%, white);
  text-align: center;
  padding: 1rem;
}

section:has(video) {
  border: 2px solid var(--accent, #9a97ac);
  border-radius: 10px;
  padding: 1rem;
}



project-card {
  display: flex;
  flex-direction: column; 
  align-items: center;  
  gap: 1rem;
}

#me me-card {
  display: flex;
  align-items: center;       
  justify-content: center;
  flex-wrap: wrap;          
  gap: 1.5rem;
  max-width: 900px;
  margin: 1.5rem auto;
  padding: 1.5rem;
}
#me me-card .text-box {
  display: flex;
  flex-direction: column;  
  align-items: flex-start; 
  gap: 1rem;
}

#me img {
  width: 250px;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

#me p, 
#me a {
  text-align: left;
  max-width: 400px;
}

@media (max-width: 600px) {
  #me me-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  #me p, #me a {
    text-align: center;
    align-items: center;
  }
  #me me-card a.button {
    margin: 1rem auto 0 auto;   
    display: inline-block;
  }
}
/* responsive design  */


article {
  border: 2px solid var(--accent, #9a97ac);   
  border-radius: 12px;                        
  padding: 1rem 1.5rem;
  margin: 1.5rem auto;                        
  max-width: 600px;                           
  background-color: var(--article-bg);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);   
}

article img {
  display: block;             
  width: 100%;                
  max-width: 400px;
  aspect-ratio: 8 / 3;  
  object-fit: cover;         
  object-position: center;                      
  margin: 0 auto 1rem auto;   
  border-radius: 10px;        
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15); 
}


@media (max-width: 900px) and (min-width: 601px) {
  header h1 {
    font-size: 1.5rem;
  }

  article {
    max-width: 500px;
  }
}

iframe {
  width: 100%;
  max-width: 600px; /* education page , ucsd website embedded */
  height: 200px;
  border: none;
}

/* Firefox */
html {
  scrollbar-color: var(--scrollbar-color-thumb, darkred) var(--main-bg, #f8f9fa);
  scrollbar-width: thin;
}

/* other web browsers */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--main-bg, #f8f9fa);
}
::-webkit-scrollbar-thumb {
  background-color: var(--scrollbar-color-thumb, rgb(223, 87, 201));
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background-color: color-mix(in srgb, var(--scrollbar-color-thumb, darkred) 70%, black);
}

@media (max-width: 600px) {
  nav ul {
  display: flex;
  flex-direction: column;
  justify-content: center;    
  align-items: center;        
  list-style: none;
  padding: 0;
  margin: 0 auto;
  gap: 0.6rem;
  background: transparent;    
  box-shadow: none;          
}

  nav a {
    display: block;
    width: 100%;
    text-align: center;
    
    padding: 0.5rem 0;
    background-color: rgb(44, 49, 74);
    color: white;
  }

  header h1 {
    font-size: 1.5rem;
    color: white;
    background-color: rgb(34, 74, 127);
    border: 1px solid #1f146b;
    border-radius: 8px;
  }
}


/******************/
main section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;

  
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
  
  
  max-width: 900px; 
  margin: 2rem auto; 
  padding: 2rem;

  color: var(--card-text);
}


main section h2 {
  color: var(--accent-color, #9e92e1);
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

main section p, main section a {
  color: var(--accent-color, #9a97ac);
  max-width: 600px; 
}


main section a.button, 
main section a {
  display: inline-block;
  margin-top: 1rem;
  text-decoration: none;
  font-weight: bold;
  color: var(--highlight, darkred);
  border: 1px solid var(--highlight, darkred);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  transition: all 0.3s ease;
}
main section a:hover {
  background-color: var(--highlight, darkred);
  color: white;
}


@media (max-width: 700px) {
  main section {
    max-width: 95%;
    padding: 1.2rem;
  }
  main section h2 {
    font-size: 1.3rem;
  }
}


#project-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  width: 90%;
  max-width: 1200px;
  margin: 2rem auto;
}