/* ===== IVY LEAGUE COLOR PALETTE ===== */
:root {
    --brown-deep: #1c1513;
    --brown-rich: #211814;
    --brown-warm: #3d2b1f;
    --brown-accent: #5c4332;
    --green-dark: #07170f;
    --green-hunter: #1c2e23;
    --green-ivy: #2a613f;/*#2d4a38;*/
    --green-accent: #3d684d;
    --green-light: #698871; /*667e6d;*/
    --cream: #f0ebe3;
    --cream-muted: #d4cfc5;
    --text-primary: #e8e4dc;
    --text-secondary: #b8b0a4;
}

/* ===== INTRO ANIMATION ===== */
.intro-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--green-dark);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.intro-text {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-weight: 900;
    color: var(--cream);
    text-align: left;
    line-height: 1.15;
    opacity: 0;
    transform: scale(0.8);
    animation: introZoomIn 1.2s ease-out 0.2s forwards;
}

.intro-text .line1 {
    font-size: 130px;
    display: block;
}

.intro-text .line2 {
    font-size: 130px;
    display: block;
}

@keyframes introZoomIn {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Hide main content until intro is done */
body.intro-active {
    overflow: hidden;
}

/* Responsive intro text */
@media (max-width: 900px) {
    .intro-text .line1,
    .intro-text .line2 {
        font-size: 60px;
    }
}

@media (max-width: 600px) {
    .intro-text .line1,
    .intro-text .line2 {
        font-size: 40px;
    }
}

/* ===== BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--brown-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ===== NAVIGATION ===== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    padding: 25px 30px;
    z-index: 1000;
}

nav .social-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

nav .social-links a {
    color: var(--text-secondary);
    font-size: 1.3em;
    transition: all 0.3s ease;
}

nav .social-links a:hover {
    color: var(--green-light);
    transform: translateY(-2px);
}

nav .social-links .nav-text-link {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: 0.95em;
    text-decoration: none;
    letter-spacing: 0.5px;
    font-weight: 400;
}

.bluesky-icon {
    width: 1.2em;
    height: 1.2em;
    vertical-align: middle;
}

/* ===== HERO / HOME SECTION ===== */
#home {
    min-height: 100vh;
    background-color: #07170f;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.hero-container {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100vh;
    align-items: center;
}

.hero-text {
    flex: 1;
    padding: 60px 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.video-text-container {
    position: relative;
    width: 100%;
    max-width: 750px;
    height: auto;
    aspect-ratio: 750 / 300;
    overflow: visible;
}

.video-text-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    object-position: center 60%;
    opacity: 0.90;
}

.text-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    width: 100%;
    height: 100%;
}

.mask-text {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: 130px;
    font-weight: 900;
    fill: black;
}

.subtitle {
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    gap: 15px;
}

.subtitle-text {
    display: flex;
    flex-direction: column;
    color: #e8e8e8;
    font-size: 1.15em;
    letter-spacing: 2px;
}

.cornell-seal {
    width: 52px;
    height: 52px;
    opacity: 0.8;
}

.hero-image {
    flex: 0 0 45%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image img {
    width: 80%;
    height: 95%;
    object-fit: cover;
    object-position: center top;
}

/* ===== SECTIONS BASE ===== */
section {
    min-height: 100vh;
    padding: 100px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.section-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

/* ===== PARALLAX & VIDEO BACKGROUNDS ===== */
.parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0.25;
}

.video-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    opacity: 0.25;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(29, 47, 35, 0.7), rgba(31, 20, 16, 0.8));
    z-index: 2;
}

/* ===== HEADINGS ===== */
h2 {
    font-size: 2.2em;
    font-weight: 300;
    margin-bottom: 35px;
    color: var(--green-light);
    letter-spacing: 2px;
}

/* ===== ABOUT SECTION ===== */
#about {
    background-color: var(--brown-rich);
}

#about h2 {
    font-size: 2.9em;
}

.about-text {
    max-width: 800px;
}

.about-text p {
    margin-bottom: 22px;
    font-size: 1.26em;
    color: var(--text-primary);
    line-height: 1.8;
}

.about-text a {
    color: var(--green-light);
    text-decoration: none;
    border-bottom: 1px solid var(--green-ivy);
    transition: all 0.3s ease;
}

.about-text a:hover {
    color: var(--cream);
    border-bottom-color: var(--cream);
}

.about-text .personal {
    margin-top: 35px;
    padding-top: 35px;
    border-top: 1px solid var(--brown-accent);
    font-style: italic;
    color: var(--text-secondary);
}

/* ===== JOURNEY SECTION ===== */
#journey {
    background-color: var(--green-dark);
    min-height: auto;
    padding: 0;
}

#journey h2 {
    font-size: 2.8em;
}

.journey-container {
    display: flex;
    width: 100%;
}

.journey-content {
    flex: 1;
    padding: 100px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: var(--green-dark);
    position: relative;
    z-index: 2;
}

.journey-video-container {
    flex: 0 0 45%;
    position: relative;
    overflow: hidden;
    max-height: 800px;
}

.journey-video-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.journey-video-fade {
    position: absolute;
    top: 0;
    left: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(to right, var(--green-dark) 0%, transparent 100%);
    z-index: 1;
}

.timeline {
    position: relative;
    padding-left: 35px;
    border-left: 2px solid var(--green-ivy);
}

.timeline-item {
    margin-bottom: 45px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -41px;
    top: 5px;
    width: 12px;
    height: 12px;
    background-color: var(--green-accent);
    border-radius: 50%;
    border: 2px solid var(--green-dark);
}

.timeline-date {
    font-size: 0.85em;
    color: var(--green-light);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 500;
}

.timeline-content {
    color: var(--text-primary);
    font-size: 1.05em;
}

.timeline-content a {
    color: var(--green-light);
    text-decoration: none;
}

.timeline-content a:hover {
    color: var(--cream);
}

/* ===== RESEARCH INTERESTS ===== */
#research {
    background: radial-gradient(ellipse at center, var(--brown-warm) 0%, var(--brown-rich) 50%, var(--brown-deep) 100%);
    min-height: auto;
    padding: 100px 60px;
}

#research h2 {
    font-size: 2.8em;
}

#research .interests {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 25px;
}

#research .interest-tag {
    background-color: var(--green-hunter);
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 0.95em;
    color: var(--cream-muted);
    border: 1px solid var(--green-ivy);
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

#research .interest-tag:hover {
    transform: translateY(-2px);
    background-color: var(--green-ivy);
    border-color: var(--green-accent);
    color: var(--cream);
}

/* ===== PUBLICATIONS ===== */
#publications {
    background-color: var(--green-dark);
}

#publications ul {
    list-style: none;
}

#publications li {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--green-hunter);
    line-height: 1.7;
}

#publications li:last-child {
    border-bottom: none;
}

#publications .paper-title {
    color: var(--green-light);
    font-style: italic;
}

#publications .journal {
    color: var(--text-secondary);
}

#publications a {
    color: var(--green-accent);
    text-decoration: none;
    font-size: 0.9em;
    transition: color 0.3s ease;
}

#publications a:hover {
    color: var(--cream);
}

/* ===== FOOTER ===== */
footer {
    background-color: var(--brown-deep);
    padding: 0;
    border-top: 1px solid var(--brown-accent);
    position: relative;
    overflow: hidden;
}

.contact-container {
    position: relative;
    width: 100%;
}

.contact-video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.contact-video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.contact-video-container video.active {
    opacity: 0.3;
}

#contact-video {
    object-position: center 40%;
}

.contact-video-fade {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom,
        var(--brown-deep) 0%,
        transparent 25%,
        transparent 75%,
        var(--brown-deep) 100%);
    z-index: 1;
}

.footer-content {
    position: relative;
    padding: 25px 60px 20px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    z-index: 2;
}

footer h2 {
    margin-bottom: 25px;
    font-size: 1.8em;
}

footer .email {
    font-size: 1.4em;
    color: var(--cream);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

footer .address {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 0.95em;
}

footer .copyright {
    margin-top: 40px;
    padding-top: 25px;
    border-top: 1px solid var(--brown-accent);
    font-size: 0.8em;
    color: var(--brown-accent);
    letter-spacing: 1px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .hero-container {
        flex-direction: column-reverse;
        height: auto;
    }

    .hero-image {
        flex: none;
        width: 100%;
        height: 65vh;
    }

    .hero-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center 10%;
    }

    .hero-text {
        padding: 40px 30px;
        text-align: center;
        align-items: center;
    }

    .video-text-container {
        width: 100%;
        max-width: 350px;
        height: auto;
        overflow: visible;
        background: none;
    }

    .video-text-container video {
        display: none;
    }

    .video-text-container .text-svg {
        display: none;
    }

    .hero-text::before {
        content: 'SYEDA MAHWISH';
        font-size: 2.5em;
        font-weight: 900;
        letter-spacing: 2px;
        color: var(--cream);
        display: block;
        text-align: center;
    }

    .mask-text {
        font-size: 70px;
    }

    .subtitle {
        flex-direction: column;
        gap: 10px;
    }

    .subtitle-text {
        font-size: 1em;
    }

    section {
        padding: 60px 25px;
        min-height: auto;
    }

    h2 {
        font-size: 1.6em;
    }

    .journey-container {
        flex-direction: column;
    }

    .journey-content {
        padding: 60px 25px;
    }

    .journey-video-container {
        flex: none;
        height: 40vh;
    }

    .journey-video-fade {
        width: 100%;
        height: 30%;
        background: linear-gradient(to bottom, var(--green-dark) 0%, transparent 100%);
    }

    .footer-content {
        padding: 30px 25px 25px 25px;
    }

    .about-text p {
        font-size: 1.1em;
    }

    .contact-video-container {
        min-height: 200px;
    }

    #research .interest-tag {
        padding: 10px 18px;
        font-size: 0.85em;
    }

    .timeline-item {
        margin-bottom: 30px;
    }

    #publications li {
        margin-bottom: 20px;
        padding-bottom: 20px;
        font-size: 0.95em;
    }
}

@media (max-width: 600px) {
    .hero-image {
        height: 60vh;
    }

    .hero-image img {
        object-position: center 5%;
    }

    .hero-text {
        padding: 30px 20px;
    }

    .video-text-container {
        width: 100%;
        height: auto;
    }

    .hero-text::before {
        font-size: 2em;
    }

    .subtitle-text {
        font-size: 0.9em;
        letter-spacing: 1px;
    }

    .cornell-seal {
        width: 40px;
        height: 40px;
    }

    nav {
        padding: 12px 15px;
    }

    nav .social-links {
        gap: 8px;
        flex-wrap: wrap;
    }

    nav .social-links a {
        font-size: 1em;
    }

    nav .social-links .nav-text-link {
        font-size: 0.75em;
    }

    section {
        padding: 50px 20px;
    }

    h2 {
        font-size: 1.4em;
        margin-bottom: 25px;
    }

    .about-text p {
        font-size: 1em;
        line-height: 1.7;
    }

    .journey-content {
        padding: 50px 20px;
    }

    .journey-video-container {
        height: 30vh;
    }

    .timeline {
        padding-left: 25px;
    }

    .timeline-item::before {
        left: -31px;
        width: 10px;
        height: 10px;
    }

    .timeline-date {
        font-size: 0.8em;
    }

    .timeline-content {
        font-size: 0.95em;
    }

    #research .interests {
        gap: 10px;
    }

    #research .interest-tag {
        padding: 8px 14px;
        font-size: 0.8em;
    }

    #publications li {
        font-size: 0.9em;
        margin-bottom: 18px;
        padding-bottom: 18px;
    }

    .contact-video-container {
        min-height: 150px;
    }

    .footer-content {
        padding: 20px 20px 15px 20px;
    }

    footer h2 {
        font-size: 1.4em;
        margin-bottom: 15px;
    }

    footer .email {
        font-size: 1.1em;
    }

    footer .address {
        font-size: 0.85em;
    }

    footer .copyright {
        margin-top: 15px;
        padding-top: 12px;
        font-size: 0.7em;
    }
}