@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');


:root {
    /* light mode */
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: white;
    --text-color: #333;
    --border-color: #dee2e6;
    --box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    --active-color: #007bff;
    --footer-bg-color: #333;
    --footer-text-color: white;


    /* dark mode */
    --dark-primary-color: #007bff;
    --dark-background-color: #333;
    --dark-text-color: white;
    --dark-border-color: #212529;
    --dark-footer-bg-color: white;
    --dark-footer-text-color: #333;
}

* {
    box-sizing: border-box;
}


body {
    display: flex;
    flex-direction: column;

    font-family: var(--font-main);
    background-color: var(--color-bg-light);
    color: var(--color-text-primary-light);
    font-size: 100%; 
    
    header {
        position: sticky;
        top: 0;
        width: 100%;
        background-color: var(--color-bg-light);
        border-bottom: 1px solid var(--color-border-light);
        
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        
        display: flex;
        justify-content: space-between;
        align-items: center;

        z-index: 1000;

        h3 {
            margin-left: 1rem;
            color: var(--color-text-secondary-light);
            width: 10%;
        }

    
        nav {
            background-color: transparent;
            width: 100%;

            .navbar-nav {
                display: flex;
                align-items: center;
                justify-content: flex-end;
                gap: 3%;
                list-style-type: none;
                margin: 0;
                padding: 0.5rem 1rem; 
                min-height: 1rem;

                .nav-item a {
                    text-decoration: none;
                    color: var(--color-text-secondary-light); 
                    transition: color 0.5s;
                }
        
                .nav-item a:hover {
                    color: var(--active-color);
                }
        
                .nav-item.active a {
                    color: var(--active-color);
                }
            }
        }
    }
}


/* css variables for light/dark mode */
:root {
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

    --color-bg-light: #ffffff;
    --color-bg-alt-light: #f3f4f6;
    --color-text-primary-light: #111827;
    --color-text-secondary-light: #374151;
    --color-text-link-light: #0000ee; /* default browser blue */
    --color-border-light: #e5e7eb;
    --color-card-bg-light: #ffffff;
    --color-card-shadow-light: 0 0.25rem 0.4rem -0.06rem rgba(0, 0, 0, 0.1), 0 0.125rem 0.25rem -0.06rem rgba(0, 0, 0, 0.06); 
    --color-icon-hover-bg-light: #e5e7eb;
    --color-icon-hover-text-light: #111827;

    --color-bg-dark: #1c1c1d;
    --color-bg-alt-dark: #1c1c1d;
    --color-text-primary-dark: #f3f4f6;
    --color-text-secondary-dark: #d1d5db;
    --color-text-muted-dark: #9ca3af;
    --color-text-link-dark: #60a5fa;
    --color-border-dark: #374151;
    --color-card-bg-dark: #1c1c1d;
    --color-card-shadow-dark: 0 0.25rem 0.4rem -0.06rem rgba(0, 0, 0, 0.4), 0 0.125rem 0.25rem -0.06rem rgba(0, 0, 0, 0.3);
    --color-icon-hover-bg-dark: #374151;
    --color-icon-hover-text-dark: #ffffff;


    --active-color-p3: color(display-p3 0 0.48 1); /* More vibrant blue than #007bff */
    --accent-hover-p3: color(display-p3 0.2 0.6 1); /* Vibrant light blue for hovers */
    
    --active-color-muted: color-mix(in srgb, var(--active-color) 60%, var(--color-text-secondary-light));
    --card-hover-bg: color-mix(in srgb, var(--color-card-bg-light) 95%, var(--active-color) 5%);
    
    --border-interactive: color-mix(in oklch, var(--color-border-light) 70%, var(--active-color) 30%);
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-alt-light);
    color: var(--color-text-primary-light);
    font-size: 100%; 

    margin: 0;
    padding: 0;
}

main {
    background-color: var(--color-bg-alt-light);
    color: var(--color-text-primary-light);
    width: 100%;
    min-height: 100vh;

    flex: 1;
    padding: 2rem;
    
    view-transition-name: main-content;

    p,
    li,
    span,
    .contact-info-item {
        color: var(--color-text-secondary-light);
    }

    .contact-info-item .fas {
        color: var(--color-text-secondary-light);
    }

    .personal-info-container {
        display: flex;
        flex-direction: column;
        margin: 0 auto;
        width: 80%;
        justify-content: space-between;
        align-items: center;

        gap: 2rem;

        image-contact-icon {
            display: flex;
            flex-direction: row;
            justify-content: space-evenly;
            width: 100%;
            height: auto;

            contact-icons {
                display: flex;
                flex-direction: column;
                justify-content: center;
                align-items: center;
                width: 60%;

                h2 h3 {
                    text-align: center;
                }
    
                .image-container {
                    align-content: center;
                    width: 40%;
                    height: auto;
                    max-height: 300px;
                    border-radius: 10%;
                }
    
                ul.contact-icons-list {
                    list-style-type: none;
                    display: flex;
                    flex-wrap: wrap;
                    flex-direction: row;
                    gap: 1rem;
    
                    li {
                        color: var(--color-text-secondary-light);
                        font-size: 2rem;
                        
                        i:hover {
                            color: var(--active-color);
                            transition: color 0.5s background-color 0.5s;
                        }

                        a {
                            text-decoration: none;
                            color: var(--color-text-secondary-light);
                        }
                    }
                }

                .contact-icons {
                    display: flex;
                    flex-direction: row;
                    gap: 1rem;
                }
            }

            figure {
                margin: 0;
    
                img {
                    max-height: 300px;
                    overflow: hidden;
                }
            }
        }

        publications, 

        .content-container {
            a {
                text-decoration: none;
                color: var(--active-color);
                transition: color 0.5s;
            }
        }
    }

    publications a {
        color: var(--active-color);
        text-decoration: underline;
        text-underline-offset: 0.2em;

        &:hover {
            color: var(--active-color-muted, #0056b3);
        }
    }

    contact-container a {
        color: var(--active-color);
        text-decoration: underline;
        text-underline-offset: 0.2em;

        &:hover {
            color: var(--active-color-muted, #0056b3);
        }
    }
}

footer {
    background-color: var(--background-color);
    color: var(--text-color);
    border-top: 1px solid var(--border-color);

    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    padding: 0.5rem;
    text-align: center;
    box-sizing: border-box;
    
    view-transition-name: footer;
}

publication-card,
experience-card {
    display: block;
    margin-bottom: 1rem;
}

/* Data loading controls */
.data-controls {
    display: flex;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-main);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background-color: var(--active-color);
    color: white;
}

.btn-primary:hover {
    background-color: color-mix(in srgb, var(--active-color) 85%, black);
}

.btn-secondary {
    background-color: var(--color-text-secondary-light);
    color: white;
}

.btn-secondary:hover {
    background-color: color-mix(in srgb, var(--color-text-secondary-light) 85%, black);
}

#publications-container,
#experiences-container {
    margin-top: 1rem;
}

iframe {
    border: 1px solid var(--color-border-light);
    border-radius: 0.5rem;
    max-width: 100%; 
}

body, header, main, footer, .personal-info, .content-container, 
publications, .experiences, contact-container,
publication-card, experience-card, #contactDialog, 
.contact-form, .navbar, .navbar h3, .nav-link,
h1, h2, h4, p, li, a, .contact-info-item span, .contact-info-item .fas,
iframe {
    transition: background-color 0.5s ease, color 0.5s ease, border-color 0.5s ease;
}

#theme-toggle-label {
    cursor: pointer;
    font-size: 1.25rem; 
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    color: inherit; 
    transition: background-color 0.2s, color 0.2s;

    .fa-sun {
        display: inline-block;
    }
    .fa-moon {
        display: none;
    }
}

.nav-item > #theme-toggle-label:hover {
    background-color: var(--color-icon-hover-bg-light);
    color: var(--color-icon-hover-text-light);
}


#theme-toggle-checkbox {
    display: none;

    &:checked {        
        & ~ header {
            background-color: var(--color-bg-alt-dark);
            color: var(--color-text-primary-dark);
            border-bottom-color: var(--color-border-dark); 

            .navbar {
                background-color: var(--color-bg-alt-dark);
                
                .nav-item a {
                    color: var(--color-text-secondary-dark);
                }
                
                .nav-item a:hover {
                    color: var(--active-color);
                }
                
                .nav-item.active a {
                    color: var(--active-color);
                }
            }
            
            #theme-toggle-label {
                color: var(--color-text-secondary-dark);

                .fa-sun {
                    display: none;
                }
                .fa-moon {
                    display: inline-block;
                }
            }
            
            .nav-item > #theme-toggle-label:hover {
                background-color: var(--color-icon-hover-bg-dark);
                color: var(--color-icon-hover-text-dark);
            }
        }

        & ~ main {
            background-color: var(--color-bg-dark);
            color: var(--color-text-primary-dark);

            h2, h4 {
                color: var(--color-text-primary-dark);
            }

            p, li, span, .contact-info-item {
                color: var(--color-text-secondary-dark);
            }

            .personal-info-container {
                .contact-info-item .fas {
                    color: var(--dark-text-color);
                }
                    
                ul.contact-icons-list li, a {
                    color: var(--dark-text-color);
                }

            }

            publication-card,
            experience-card {
                /* Set CSS variables that Shadow DOM will inherit */
                --color-card-bg-light: var(--color-card-bg-dark);
                --color-border-light: var(--color-border-dark);
                --color-text-primary-light: var(--color-text-primary-dark);
                --color-text-secondary-light: var(--color-text-secondary-dark);
                --color-card-shadow-light: var(--color-card-shadow-dark);
            }
        }

        & ~ footer {
            background-color: var(--color-bg-alt-dark);
            color: var(--color-text-muted-dark);
            border-top-color: var(--color-border-dark);
        }
    }
}

body:has(#theme-toggle-checkbox:checked) {
    background-color: var(--color-bg-dark);
}

@media (max-width: 768px) {
    main {
        .personal-info-container {
            image-contact-icon {
                align-items: center;
                flex-direction: column;
            }
        }
    }

    header nav .navbar-nav {
        flex-direction: column;
        align-items: center;
        gap: 5%;
        padding: 1rem;
        background-color: transparent;
    }    
}


::view-transition-group(footer) {
    animation-duration: 0s;
}

::view-transition-old(main-content) {
    animation: slide-out-left 0.4s ease-in-out;
}

::view-transition-new(main-content) {
    animation: slide-in-right 0.4s ease-in-out;
}

@keyframes slide-out-left {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(-30px);
        opacity: 0;
    }
}

@keyframes slide-in-right {
    from {
        transform: translateX(30px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

::view-transition-group(*) {
    animation-duration: 0.4s;
    animation-timing-function: ease-in-out;
}

::view-transition {
    pointer-events: none;
}