/* Clean minimal layout for Yimian Liu's homepage */

html {
    font-size: 16px;
    letter-spacing: .33px;
    scroll-behavior: smooth;
}

html, body {
    min-width: 20rem;
    overflow-x: hidden;
    height: 100vh;
}

body {
    color: #343a40;
    background: #fff;
    font-weight: 400;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    box-sizing: border-box;
    font-family: 'Source Code Pro', monospace;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

body * {
    box-sizing: inherit;
}

h1, h2, h3, h4, h5 {
    font-weight: 400;
}

a {
    text-decoration: none;
    color: #05b;
    /* Touch-friendly tap targets */
    min-height: 44px;
    display: inline-block;
    padding: 0.2rem 0;
}

a:visited {
    color: #8440f1;
}

a:hover {
    text-decoration: underline;
}

/* Layout */
.container {
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* Homepage specific styles */
.homepage-header {
    margin-bottom: 1.5rem;
    text-align: left;
}

.homepage-header h1 {
    font-size: clamp(2rem, 4.5vw, 2.8rem);
    font-weight: 500;
    color: #555;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.homepage-content {
    line-height: 1.6;
    text-align: left;
    max-width: 500px;
}

.homepage-content p {
    margin-bottom: 1.2rem;
    color: #666;
    font-size: clamp(0.92rem, 2.2vw, 1.05rem);
    font-weight: 400;
}

.homepage-content p:first-child {
    font-size: clamp(1.05rem, 2.8vw, 1.2rem);
    color: #555;
    font-weight: 400;
    margin-bottom: 1.5rem;
}

/* Canvas background */
#boids1 {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* Contact links - more subtle styling */
.homepage-content p:last-child {
    margin-bottom: 0;
    font-style: italic;
    color: #888;
    font-size: clamp(0.85rem, 2.0vw, 0.95rem);
}

.homepage-content p:last-child a {
    color: #777;
    text-decoration: none;
    font-weight: 300;
}

.homepage-content p:last-child a:hover {
    color: #555;
    text-decoration: underline;
}

.homepage-content p:last-child a:visited {
    color: #777;
}

/* Enhanced Responsive Design */

/* Large tablets and small desktops */
@media screen and (max-width: 1024px) {
    .container {
        max-width: 90%;
        padding: 1.5rem;
    }
}

/* Tablets */
@media screen and (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .container {
        padding: 1rem;
        max-width: 95%;
    }
    
    .homepage-header {
        margin-bottom: 1.5rem;
    }
    
    .homepage-content p {
        margin-bottom: 1.2rem;
    }
    
    .homepage-content p:first-child {
        margin-bottom: 1.5rem;
    }
    
    body {
        align-items: flex-start;
        padding-top: 3rem;
        padding-bottom: 2rem;
    }
}

/* Large phones */
@media screen and (max-width: 640px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 1rem;
    }
    
    body {
        padding-top: 2rem;
        padding-bottom: 1.5rem;
    }
    
    .homepage-content {
        line-height: 1.6;
    }
}

/* Small phones */
@media screen and (max-width: 480px) {
    html {
        /* Use device font size for better accessibility */
        font-size: 16px;
    }
    
    .container {
        padding: 1rem;
        max-width: 100%;
    }
    
    .homepage-header {
        margin-bottom: 1rem;
    }
    
    .homepage-content p {
        margin-bottom: 1rem;
        text-align: left;
    }
    
    .homepage-content p:first-child {
        margin-bottom: 1.25rem;
    }
    
    .homepage-content p:last-child {
        margin-top: 1rem;
    }
    
    body {
        padding-top: 1.5rem;
        padding-bottom: 1rem;
        align-items: flex-start;
    }
}

/* Very small phones */
@media screen and (max-width: 360px) {
    .container {
        padding: 0.75rem;
    }
    
    .homepage-content p {
        margin-bottom: 0.875rem;
    }
    
    .homepage-header {
        margin-bottom: 0.875rem;
    }
}

/* Landscape phones */
@media screen and (max-height: 500px) and (orientation: landscape) {
    body {
        align-items: flex-start;
        padding-top: 1rem;
        padding-bottom: 0.5rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    .homepage-header {
        margin-bottom: 0.75rem;
    }
    
    .homepage-content p {
        margin-bottom: 0.75rem;
    }
    
    .homepage-content p:first-child {
        margin-bottom: 1rem;
    }
}

/* High DPI displays */
@media screen and (-webkit-min-device-pixel-ratio: 2), 
       screen and (min-resolution: 192dpi) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    #boids1 {
        /* Reduce or disable animation for users who prefer reduced motion */
        opacity: 0.3;
    }
}