:root {
    --main-blue: #3AA6EE;
    --secondary-tan: #EBD7A9;
    --tertiary-green: #556F44;
    --quaternary-blue: #274C77;
    --quinary-pink: #AA767C;
}

/* Base styles */
body {
    font-family: 'Times New Roman', Times, serif;
    margin: 0;
    padding: 0;
    flex: 1;
}

.container {
    height: 100vh;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    flex: 1;
}

header {
    height: 100vh;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--main-blue);
    color: var(--secondary-tan);
    scroll-snap-align: start;
}

header img {
    height: 75vh;
    width: auto;
    margin-left: 4vw;
    border: 6px solid var(--secondary-tan);
    border-radius: 50%;
    display: block;
}

.header-description {
    display: flex;
    align-items: center;
    flex-direction: column;
    margin-right: 4vw;
}

.header-description h1 {
    font-size: 4em;
    margin-bottom: 5px;
}

.header-description p {
    font-size: 2em;
    margin-top: 0;
    margin-bottom: 10px;
}

.header-description ul {
    outline: 1px solid var(--secondary-tan);
    border-radius: 5px;
    list-style: none;
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 0;
}

.header-description ul a {
    color: var(--secondary-tan);
    text-decoration: none;
}

.header-description ul li {
    font-size: 1.5em;
    padding: 10px;
}

.header-description ul li:hover {
    background-color: var(--secondary-tan);
    border-radius: 5px;
    cursor: pointer;
}

.header-description ul li:hover a {
    color: var(--main-blue);
}

/* Section styling */
section {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    scroll-snap-align: start;
    position: relative;
    padding: 40px;
    box-sizing: border-box;
}

/* About Section */
#about {
    background-color: var(--secondary-tan);
    color: var(--main-blue);
}

#about h2 {
    font-size: 3em;
    margin-bottom: 15px;
}

#about p {
    font-size: 1.5em;
    margin: 0 auto;
    max-width: 800px;
    padding: 0 5vw;
}

/* Publications Section */
#publications {
    background-color: var(--quaternary-blue);
    color: var(--secondary-tan);
    padding: 40px 20px;
    height: auto;
}

#publications h2 {
    font-size: 2em;
    margin-bottom: 10px;
}

.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 10px;
    padding: 10px;
    max-width: 1200px;
    margin: auto;
    margin-top: 10px;
}

.project-card {
    background: #b6cbe2;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transition: transform 0.3s ease-in-out;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.project-card:hover {
    transform: translateY(-5px);
}

.img-and-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-bottom: 10px;
}

.img-and-title img {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 5px;
}

.img-and-title h2 {
    font-size: 1.5em;
    margin: 10px 0;
    color: var(--quaternary-blue);
}

.project-card p {
    font-size: 1em;
    color: #333;
    padding: 0 15px;
    text-align: center;
}

.project-card a {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 12px;
    text-decoration: none;
    color: #fff;
    background: var(--main-blue);
    border-radius: 5px;
    transition: background 0.3s ease;
}

.project-card a:hover {
    background: #2b8edc;
}

/* Social Links */
#social-links {
    background: linear-gradient(135deg, var(--main-blue), #1f77d0);
    color: var(--secondary-tan);
    padding: 50px 20px;
    text-align: center;
}

#social-links h3 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

.social-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.social-card {
    background: rgba(255, 255, 255, 0.15);
    padding: 15px 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--secondary-tan);
    font-size: 1.5em;
    font-weight: bold;
    gap: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.social-card:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-5px);
}

.social-card img {
    width: 30px;
    height: 30px;
    filter: invert(1);
}

/* Contact Form */
#contact {
    background-color: var(--main-blue);
    color: var(--secondary-tan);
}

#contact h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

form {
    background: var(--secondary-tan);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 350px;
    max-width: 90%;
}

form input,
form textarea {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 2px solid var(--main-blue);
    border-radius: 5px;
    font-size: 1em;
    background: #fff;
    color: #333;
}

form input:focus,
form textarea:focus {
    outline: 0;
    border-color: var(--main-blue);
    box-shadow: 0 0 8px var(--quaternary-blue);
}

form textarea {
    height: 120px;
    resize: none;
}

form button {
    background: var(--main-blue);
    color: #fff;
    font-size: 1.2em;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease-in-out, transform 0.2s;
}

form button:hover {
    background: #2b8edc;
    transform: translateY(-2px);
}

/* Footer */
footer {
    background-color: #2b8edc;
    color: var(--secondary-tan);
    text-align: center;
    padding: 15px;
    position: relative;
    margin-top: auto;
    width: 100%;
    border-radius: 5px;
}

/* -----------------------------------
   Responsive Fixes for Small Devices
-------------------------------------- */

@media (max-width: 1000px) {
    header {
        flex-direction: column;
        align-items: center;
        height: auto;
        padding: 30px 20px;
    }

    header img {
        max-height: 40vh;
        margin: 0;
    }

    .header-description {
        margin: 0;
    }
}

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

    .header-description h1 {
        font-size: 2em;
    }

    .header-description p {
        font-size: 1.2em;
    }

    .header-description ul {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        width: auto;
    }

    .header-description ul li {
        font-size: 1.2em;
        padding: 8px;
    }

    section {
        height: auto;
        padding: 30px 15px;
    }

    #about p {
        font-size: 1.1em;
        padding: 0 5vw;
    }

    form {
        width: 100%;
        max-width: 350px;
        padding: 20px;
    }

    .social-card {
        font-size: 1.1em;
        padding: 12px;
    }

    .social-card img {
        width: 24px;
        height: 24px;
    }
}