/* Minimal CSS for index.html - Only essential styles */

/* ============ Core Reset & Typography ============ */
* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    text-decoration: none !important;
    list-style: none !important;
    outline: none !important;
}

h1, h2, h3, h4, h5, h6 {
    color: #222;
}

img {
    width: 100%;
    height: auto;
}

a, a:hover, a:focus {
    color: inherit;
}

body {
    font-family: "Raleway", "arial-adjusted", "roboto-adjusted";
    position: relative;
    font-size: 16px;
    line-height: 1.65;
    color: #484848;
    -webkit-font-smoothing: antialiased;
}

p {
    font-size: 16px;
    line-height: 1.65;
    font-family: "Open Sans", sans-serif;
}

/* ============ Utility Classes ============ */
.bg-gray {
    background-color: #f2f2f2;
}

.pt-30 {
    padding-top: 30px !important;
}

.pt-40 {
    padding-top: 40px !important;
}

.pt-50 {
    padding-top: 50px !important;
}

.pt-100 {
    padding-top: 100px !important;
}

.pb-50 {
    padding-bottom: 50px !important;
}

.pb-100 {
    padding-bottom: 100px !important;
}

.mt-30 {
    margin-top: 30px !important;
}

/* ============ Heading Styles ============ */
.heading {
    margin-bottom: 50px;
}

.heading h2 {
    font-size: 32px;
    font-weight: 600;
    text-transform: uppercase;
}

/* ============ Button Styles ============ */
.main-btn {
    display: inline-block;
    background-color: #222;
    padding: 10px 20px;
    border: 2px solid #222;
    color: #fff;
    text-transform: uppercase;
    transition: .2s background-color ease;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.main-btn:hover {
    color: #222;
    background-color: transparent;
}

/* ============ Navbar ============ */
nav.navbar {
    position: absolute;
    width: 100%;
    top: 0;
    z-index: 999;
    padding-top: 30px;
    padding-bottom: 20px;
    transition: all .5s ease;
}

nav.navbar .logo {
    font-size: 22px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #fff;
    font-family: 'Montserrat', sans-serif;
}

nav.navbar .navbar-toggler {
    border: 0;
}

nav.navbar .navbar-toggler .navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(255,255,255, 1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 8h24M4 16h24M4 24h24'/%3E%3C/svg%3E");
}

nav.navbar .nav-item {
    font-size: 13px;
    font-weight: 400;
    padding-right: 13px;
    padding-left: 13px;
    color: #fff;
    text-transform: uppercase;
}

nav.navbar .nav-item:first-child {
    padding-left: 0;
}

nav.navbar .nav-item:last-child {
    padding-right: 0;
}

nav.navbar .nav-item .nav-link {
    color: #fff;
    position: relative;
    text-decoration: none;
    padding: 0;
}

nav.navbar .nav-item .nav-link:before {
    content: "";
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #fff;
    visibility: hidden;
    transform: scaleX(0);
    transition: all 0.3s ease-in-out 0s;
}

nav.navbar .nav-item .nav-link.active:before,
nav.navbar .nav-item .nav-link.last-active:before {
    visibility: visible;
    transform: scaleX(1);
}

nav.fixed-top {
    position: fixed;
    padding-top: 13px;
    padding-bottom: 13px;
    background-color: #fff;
    box-shadow: 0px 0px 18px 1px rgba(0, 0, 0, 0.1);
}

nav.fixed-top .logo {
    color: #000;
}

nav.fixed-top .logo:focus,
nav.fixed-top .logo:hover {
    color: #000;
}

nav.fixed-top .navbar-toggler .navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(0,0,0, 1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 8h24M4 16h24M4 24h24'/%3E%3C/svg%3E");
}

nav.fixed-top .nav-item {
    color: #000;
}

nav.fixed-top .nav-item .nav-link {
    color: #000 !important;
}

nav.fixed-top .nav-item .nav-link:before {
    background-color: #000;
}

/* ============ Banner Section ============ */
.banner {
    width: 100%;
    background-size: cover;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
}

.banner:after {
    content: " ";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #000;
    z-index: 2;
    opacity: .5;
}

.banner .banner-caption {
    top: 50%;
    position: absolute;
    color: #ffffff;
    z-index: 11;
    width: 100%;
    transform: translateY(-50%);
    padding-left: 350px;
}

.banner .banner-caption h1 {
    font-size: 88px;
    font-weight: 900;
    color: #ffffff;
    font-display: optional;
    font-family: "arial-h1-adjusted", "roboto-h1-adjusted";
}

.banner .banner-caption p {
    font-size: 24px;
    font-family: "arial-adjusted", "roboto-adjusted";
    color: #ffffff;
    font-display: optional;
}

.cd-headline {
    font-size: 3rem;
    line-height: 1.2;
}

.cd-words-wrapper {
    display: inline-block;
    position: relative;
    text-align: left;
}

.cd-words-wrapper b {
    display: inline-block;
    position: absolute;
    white-space: nowrap;
    left: 0;
    top: 0;
}

.cd-words-wrapper b.is-visible {
    position: relative;
}

.cd-headline.clip span {
    display: inline-block;
    padding: .2em 0;
}

.cd-headline.clip .cd-words-wrapper {
    overflow: hidden;
    vertical-align: top;
}

.cd-headline.clip .cd-words-wrapper::after {
    content: '';
    position: absolute;
    top: 10%;
    right: 0;
    width: 2px;
    height: 70%;
    background-color: #aebcb9;
}

.cd-headline.clip b {
    opacity: 0;
}

.cd-headline b.is-visible {
    opacity: 1;
    font-weight: 700;
}

.arrow {
    position: absolute;
    bottom: 10vh;
    width: 100vw;
    z-index: 11;
    padding-left: 75px;
}

.arrow a {
    color: #fff;
}

/* ============ About Section ============ */
section.about .about-img {
    position: relative;
}

section.about .about-img:before {
    content: "";
    background-color: #f2f2f2;
    width: 100%;
    height: 100%;
    position: absolute;
    bottom: -10%;
    left: -10%;
    z-index: 0;
}

section.about .about-img img {
    position: relative;
    width: 100%;
    z-index: 1;
    box-shadow: 0 0 85px 0 rgba(0, 0, 0, 0.14);
}

section.about .about-content .about-heading {
    margin-bottom: 20px;
}

section.about .about-content .about-heading h2 {
    font-size: 32px;
    font-weight: 600;
    text-transform: uppercase;
}

section.about .about-content p {
    line-height: 28px;
}

section.about .about-content .social-icons {
    margin-top: 30px;
    width: 50%;
}

section.about .about-content .social-icons a {
    display: inline-block;
    font-size: 15px;
    line-height: 26px;
    text-align: center;
    margin-right: 10px;
    background-color: #222;
    border-radius: 50%;
    border: 2px solid #222;
    width: 30px;
    height: 30px;
    transition: .2s all ease;
}

section.about .about-content .social-icons a .fa {
    color: #fff;
    transition: .2s all ease;
}

section.about .about-content .social-icons a:hover {
    border: 2px solid #222;
    background: transparent;
    line-height: 26px;
}

section.about .about-content .social-icons a:hover .fa {
    color: #222;
}

section.about .about-content .about-button {
    margin-top: 23px;
}

/* ============ Research & Projects Sections ============ */
section.research .paper-info,
section.projects .paper-info {
    font-size: 16px;
    font-weight: 450;
}

section.research .paper-info a,
section.projects .paper-info a {
    color: rgb(12, 109, 189);
}

section.research .paper-info heading,
section.projects .paper-info heading {
    font-size: 20px;
    font-weight: 500;
    color: rgb(0, 71, 119);
}

section.research .paper-thumbnail,
section.projects .paper-thumbnail {
    margin-bottom: 30px;
    padding-right: 10px;
}

section.research .paper-thumbnail img,
section.projects .paper-thumbnail img {
    width: 90%;
    height: auto;
    padding-top: 0px;
    padding-bottom: 0px;
    border-radius: 10px;
}

section.research .paper-thumbnail:hover img,
section.projects .paper-thumbnail:hover img {
    box-shadow: 0 5px 30px #e3e3e3;
    border-color: #f2f2f2;
}

/* ============ Footer ============ */
footer {
    background: #222;
}

footer .copy {
    font-size: 14px;
    color: #aaa;
}

/* ============ Mobile Responsive ============ */
@media screen and (max-width: 991px) {
    .navbar-collapse {
        text-align: center;
        background-color: rgba(34, 34, 34, 0.9);
    }
    .navbar-collapse .nav-item {
        padding: 0 !important;
    }
    .navbar-collapse .nav-item a {
        display: inline-block;
        margin-top: 10px;
        margin-bottom: 10px;
    }
    .fixed-top .navbar-collapse {
        background-color: transparent;
    }
    .banner .banner-caption h1 {
        font-size: 75px;
    }
    .banner .banner-caption p {
        font-size: 21px;
    }
    section.about .about-img:before {
        display: none;
    }
    section.about .about-content {
        margin-top: 50px;
    }
}

@media screen and (max-width: 767px) {
    .banner .banner-caption {
        padding-left: 20px;
    }
    .banner .banner-caption h1 {
        font-size: 46px;
    }
    .banner .banner-caption p {
        font-size: 17px;
    }
    .cd-headline {
        display: none;
    }
    .arrow {
        padding-left: 20px;
    }
}

/* ============ Fallback Fonts ============ */
@font-face {
    font-family: arial-adjusted;
    src: local("Arial");
    size-adjust: 103%;
    ascent-override: 90%;
    descent-override: 25%;
    line-gap-override: 0%;
}

@font-face {
    font-family: arial-h1-adjusted;
    src: local("Arial");
    size-adjust: 104.8%;
    ascent-override: 89%;
    descent-override: 23%;
    line-gap-override: 0%;
}

@font-face {
    font-family: roboto-adjusted;
    src: local("Roboto");
    size-adjust: 103%;
    ascent-override: 90%;
    descent-override: 25%;
    line-gap-override: 0%;
}

@font-face {
    font-family: roboto-h1-adjusted;
    src: local("Roboto");
    size-adjust: 103%;
    ascent-override: 90%;
    descent-override: 25%;
    line-gap-override: 0%;
}