/* =========================================================
   CEYLON WASTE MANAGEMENT
   RESEARCH & DEVELOPMENT PAGE
   Main Green: #32c037
========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');


/* =========================================================
   VARIABLES
========================================================= */

:root {
    --green: #32c037;
    --green-dark: #24962b;
    --green-deep: #176d20;
    --green-light: #65d968;

    --green-soft: #eaf9eb;
    --green-pale: #f5fcf5;

    --white: #ffffff;

    --text-dark: #1d3022;
    --text: #59675c;
    --text-light: #7d8a80;

    --border: #e0ebe1;

    --shadow:
        0 12px 35px rgba(25, 91, 32, 0.09);

    --shadow-hover:
        0 22px 55px rgba(25, 91, 32, 0.17);
}


/* =========================================================
   RESET
========================================================= */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;

    background:
        radial-gradient(
            circle at 10% 30%,
            rgba(50, 192, 55, 0.05),
            transparent 28%
        ),
        #f8fbf8;

    color: var(--text);

    line-height: 1.7;

    overflow-x: hidden;
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
}

ul {
    list-style: none;
}


/* =========================================================
   HEADER
========================================================= */

header {
    position: fixed;

    top: 0;
    left: 0;

    width: 100%;
    height: 84px;

    z-index: 9999;

    background:
        rgba(255, 255, 255, 0.97);

    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);

    border-bottom:
        1px solid rgba(50, 192, 55, 0.10);

    box-shadow:
        0 7px 30px rgba(25, 91, 32, 0.08);
}


/* =========================================================
   NAVBAR
========================================================= */

.navbar {
    width: 92%;
    max-width: 1380px;

    height: 84px;

    margin: auto;

    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 25px;
}


/* =========================================================
   LOGO
========================================================= */

.logo img {
    width: 150px;
    height: auto;

    transition:
        transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.04);
}


/* =========================================================
   NAVIGATION LINKS
========================================================= */

.nav-links {
    display: flex;

    align-items: center;
    justify-content: flex-end;

    gap: 27px;
}

.nav-links > li {
    position: relative;
}

.nav-links > li > a {
    position: relative;

    display: block;

    padding: 31px 0;

    color: #293b2c;

    font-size: 13.5px;
    font-weight: 600;

    white-space: nowrap;

    transition:
        color 0.3s ease;
}


/* Navigation underline */

.nav-links > li > a:not(.nav-btn)::after {
    content: "";

    position: absolute;

    left: 50%;
    bottom: 21px;

    width: 0;
    height: 2px;

    background:
        linear-gradient(
            90deg,
            #32c037,
            #65d968
        );

    border-radius: 10px;

    transform:
        translateX(-50%);

    transition:
        width 0.3s ease;
}

.nav-links > li > a:hover {
    color: #32c037;
}

.nav-links > li > a:hover::after {
    width: 70%;
}


/* =========================================================
   DROPDOWN
========================================================= */

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;

    top: calc(100% - 5px);
    left: 50%;

    width: 280px;

    padding: 10px;

    background:
        rgba(255, 255, 255, 0.99);

    border:
        1px solid rgba(50, 192, 55, 0.12);

    border-radius: 16px;

    box-shadow:
        0 20px 50px rgba(25, 91, 32, 0.16);

    opacity: 0;
    visibility: hidden;

    transform:
        translate(-50%, 15px);

    transition:
        all 0.25s ease;

    z-index: 10000;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;

    transform:
        translate(-50%, 0);
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-menu li a {
    display: block;

    padding: 11px 15px;

    color: #536057;

    border-radius: 9px;

    font-size: 13px;
    font-weight: 500;

    transition:
        all 0.25s ease;
}

.dropdown-menu li a:hover {
    color: var(--green-dark);

    background: var(--green-soft);

    padding-left: 20px;
}


/* =========================================================
   SCHEDULE PICKUP BUTTON
========================================================= */

.nav-links .nav-btn {
    display: inline-flex;

    align-items: center;
    justify-content: center;

    padding:
        12px 21px !important;

    color:
        #ffffff !important;

    background:
        linear-gradient(
            135deg,
            #32c037,
            #24962b
        );

    border-radius: 50px;

    box-shadow:
        0 8px 22px rgba(50, 192, 55, 0.28);

    white-space: nowrap;

    transition:
        all 0.3s ease;
}

.nav-links .nav-btn::after {
    display: none !important;
}

.nav-links .nav-btn:hover {
    color:
        #ffffff !important;

    transform:
        translateY(-3px);

    box-shadow:
        0 13px 30px rgba(50, 192, 55, 0.36);
}


/* =========================================================
   HERO BANNER
========================================================= */

.cwm-banner {
    position: relative;

    width: 92%;
    max-width: 1380px;

    height: 410px;

    margin:
        100px auto 0;

    overflow: hidden;

    border-radius:
        0 0 36px 36px;

    background:
        linear-gradient(
            90deg,
            rgba(15, 87, 23, 0.96) 0%,
            rgba(36, 150, 43, 0.88) 40%,
            rgba(50, 192, 55, 0.52) 72%,
            rgba(17, 84, 23, 0.25) 100%
        ),
        url("images/research.jpg");

    background-size: cover;
    background-position: center;

    box-shadow:
        0 25px 60px rgba(25, 91, 32, 0.20);
}


/* Dark overlay */

.cwm-banner::before {
    content: "";

    position: absolute;

    inset: 0;

    background:
        linear-gradient(
            90deg,
            rgba(0, 0, 0, 0.14),
            transparent 70%
        );
}


/* Decorative glow */

.cwm-banner::after {
    content: "";

    position: absolute;

    width: 550px;
    height: 550px;

    right: -180px;
    top: -250px;

    border-radius: 50%;

    background:
        radial-gradient(
            circle,
            rgba(255, 255, 255, 0.18),
            transparent 68%
        );
}


/* =========================================================
   BANNER CONTENT
========================================================= */

.banner-content {
    position: relative;

    z-index: 5;

    width: 100%;
    height: 100%;

    padding:
        75px 8%;

    display: flex;
    flex-direction: column;
    justify-content: center;

    color: #ffffff;
}


/* Badge */

.banner-content::before {
    content: "INNOVATION & SUSTAINABILITY";

    width: fit-content;

    margin-bottom: 18px;

    padding:
        8px 17px;

    color: #ffffff;

    background:
        rgba(255, 255, 255, 0.13);

    border:
        1px solid rgba(255, 255, 255, 0.22);

    border-radius: 50px;

    backdrop-filter: blur(8px);

    font-size: 11px;
    font-weight: 700;

    letter-spacing: 2px;
}

.banner-content h1 {
    max-width: 850px;

    color: #ffffff;

    font-size:
        clamp(40px, 4.8vw, 64px);

    font-weight: 800;

    line-height: 1.08;

    letter-spacing: -2.5px;

    text-shadow:
        0 6px 25px rgba(0, 0, 0, 0.18);
}


/* =========================================================
   BANNER DECORATION
========================================================= */

.overlay-circle {
    position: absolute;

    width: 620px;
    height: 620px;

    right: -250px;
    top: -260px;

    border:
        1px solid rgba(255, 255, 255, 0.13);

    border-radius: 50%;
}

.overlay-circle2 {
    position: absolute;

    width: 400px;
    height: 400px;

    right: 100px;
    bottom: -270px;

    border:
        1px solid rgba(255, 255, 255, 0.11);

    border-radius: 50%;
}


/* Hide stray icon */

.cwm-banner > .fa-recycle {
    display: none;
}


/* CWM text */

.about-cwm-content {
    position: absolute;

    left: 8%;
    bottom: 35px;

    z-index: 10;
}

.about-cwm-content h4 {
    color:
        rgba(255, 255, 255, 0.78);

    font-size: 13px;
    font-weight: 400;

    letter-spacing: 1px;
}


/* =========================================================
   MAIN PAGE
========================================================= */

.about-page {
    width: 92%;
    max-width: 1380px;

    margin:
        80px auto 110px;

    display: grid;

    grid-template-columns:
        270px minmax(0, 1fr);

    gap: 55px;

    align-items: start;
}


/* =========================================================
   SIDEBAR
========================================================= */

.about-sidebar {
    position: sticky;

    top: 115px;

    padding:
        30px 24px;

    background:
        rgba(255, 255, 255, 0.98);

    border:
        1px solid rgba(50, 192, 55, 0.12);

    border-radius: 21px;

    box-shadow: var(--shadow);
}

.about-sidebar h2 {
    position: relative;

    margin-bottom: 27px;
    padding-bottom: 18px;

    color: #32c037;

    font-size: 29px;
    font-weight: 800;

    letter-spacing: -1px;
}

.about-sidebar h2::after {
    content: "";

    position: absolute;

    left: 0;
    bottom: 0;

    width: 52px;
    height: 4px;

    background: #32c037;

    border-radius: 20px;
}


/* Sidebar list */

.about-sidebar ul {
    display: flex;

    flex-direction: column;

    gap: 5px;
}

.about-sidebar li a {
    position: relative;

    display: flex;
    align-items: center;

    padding:
        12px 14px;

    color: #5c695f;

    border-radius: 10px;

    font-size: 13.5px;
    font-weight: 500;

    transition:
        all 0.25s ease;
}


/* Dot */

.about-sidebar li a::before {
    content: "";

    width: 6px;
    height: 6px;

    margin-right: 10px;

    flex-shrink: 0;

    background: #b5c8b7;

    border-radius: 50%;

    transition:
        all 0.25s ease;
}

.about-sidebar li a:hover {
    color: #32c037;

    background: var(--green-soft);

    padding-left: 18px;
}

.about-sidebar li a:hover::before {
    background: #32c037;
}


/* Active sidebar item */

.about-sidebar li.active a {
    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            #32c037,
            #24962b
        );

    font-weight: 600;

    box-shadow:
        0 8px 22px rgba(50, 192, 55, 0.25);
}

.about-sidebar li.active a::before {
    background: #ffffff;
}


/* =========================================================
   MAIN CONTENT
========================================================= */

.about-content {
    min-width: 0;

    padding:
        5px 10px 30px;
}


/* Main heading */

.about-content > h1 {
    margin-bottom: 15px;

    color: #32c037;

    font-size:
        clamp(38px, 4.2vw, 52px);

    font-weight: 800;

    line-height: 1.15;

    letter-spacing: -2px;
}


/* =========================================================
   TITLE LINE
========================================================= */

.title-line {
    position: relative;

    width: 100%;
    height: 1px;

    margin:
        0 0 38px;

    background: var(--border);
}

.title-line::before {
    content: "";

    position: absolute;

    left: 0;
    top: -2px;

    width: 95px;
    height: 5px;

    background:
        linear-gradient(
            90deg,
            #32c037,
            #65d968
        );

    border-radius: 20px;
}


/* =========================================================
   R&D IMAGE GALLERY
========================================================= */

.ewaste-gallery {
    display: grid;

    grid-template-columns:
        1.35fr 1fr;

    grid-template-rows:
        230px 230px;

    gap: 18px;

    margin:
        0 0 45px;
}


/* Large image */

.gallery-item:first-child {
    grid-row: span 2;
}


/* Gallery card */

.gallery-item {
    position: relative;

    overflow: hidden;

    background: var(--green-soft);

    border:
        1px solid rgba(50, 192, 55, 0.12);

    border-radius: 20px;

    box-shadow:
        0 12px 32px rgba(25, 91, 32, 0.10);

    transition:
        transform 0.35s ease,
        box-shadow 0.35s ease;
}

.gallery-item:hover {
    transform:
        translateY(-6px);

    box-shadow:
        0 22px 45px rgba(25, 91, 32, 0.17);
}


/* Gallery images */

.gallery-item img {
    width: 100%;
    height: 100%;

    object-fit: cover;

    transition:
        transform 0.6s ease,
        filter 0.4s ease;
}

.gallery-item:hover img {
    transform:
        scale(1.07);

    filter:
        brightness(0.90);
}


/* Image overlay */

.gallery-item::after {
    content: "";

    position: absolute;

    inset: 0;

    background:
        linear-gradient(
            to top,
            rgba(14, 94, 24, 0.38),
            transparent 55%
        );

    opacity: 0;

    transition:
        opacity 0.35s ease;

    pointer-events: none;
}

.gallery-item:hover::after {
    opacity: 1;
}


/* Green corner decoration */

.gallery-item::before {
    content: "";

    position: absolute;

    z-index: 4;

    left: 0;
    bottom: 0;

    width: 0;
    height: 5px;

    background:
        linear-gradient(
            90deg,
            #32c037,
            #65d968
        );

    transition:
        width 0.4s ease;
}

.gallery-item:hover::before {
    width: 100%;
}


/* =========================================================
   INTRO PARAGRAPH
========================================================= */

.about-content > p {
    max-width: 1000px;

    margin-bottom: 30px;

    color: #5d6b60;

    font-size: 15px;

    line-height: 1.95;

    text-align: justify;
}


/* =========================================================
   R&D SECTION HEADINGS
========================================================= */

.about-content h3 {
    position: relative;

    margin:
        35px 0 18px;

    padding:
        16px 22px 16px 25px;

    color: #32c037;

    background:
        linear-gradient(
            90deg,
            rgba(50, 192, 55, 0.09),
            rgba(50, 192, 55, 0.015)
        );

    border-left:
        5px solid #32c037;

    border-radius:
        0 14px 14px 0;

    font-size: 22px;
    font-weight: 700;

    line-height: 1.4;

    box-shadow:
        0 7px 25px rgba(25, 91, 32, 0.05);

    transition:
        all 0.3s ease;
}

.about-content h3:hover {
    padding-left: 30px;

    background:
        linear-gradient(
            90deg,
            rgba(50, 192, 55, 0.14),
            rgba(50, 192, 55, 0.02)
        );
}


/* =========================================================
   SECTION PARAGRAPHS
========================================================= */

.about-content h3 + p {
    position: relative;

    margin:
        0 0 32px;

    padding:
        23px 25px;

    color: #59675c;

    background: #ffffff;

    border:
        1px solid rgba(50, 192, 55, 0.11);

    border-radius: 15px;

    box-shadow:
        0 9px 28px rgba(25, 91, 32, 0.06);

    font-size: 15px;

    line-height: 1.9;

    transition:
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

.about-content h3 + p:hover {
    transform:
        translateY(-3px);

    box-shadow:
        0 15px 35px rgba(25, 91, 32, 0.10);
}


/* =========================================================
   SCROLLBAR
========================================================= */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #edf4ee;
}

::-webkit-scrollbar-thumb {
    background:
        linear-gradient(
            #32c037,
            #24962b
        );

    border-radius: 20px;
}

::-webkit-scrollbar-thumb:hover {
    background: #24962b;
}


/* =========================================================
   TEXT SELECTION
========================================================= */

::selection {
    color: #ffffff;

    background: #32c037;
}


/* =========================================================
   TABLET
========================================================= */

@media (max-width: 1150px) {

    .nav-links {
        gap: 16px;
    }

    .nav-links > li > a {
        font-size: 12px;
    }

    .about-page {
        grid-template-columns:
            240px minmax(0, 1fr);

        gap: 35px;
    }

    .ewaste-gallery {
        grid-template-rows:
            210px 210px;
    }
}


/* =========================================================
   SMALL LAPTOP / TABLET
========================================================= */

@media (max-width: 992px) {

    header {
        height: auto;

        min-height: 84px;
    }

    .navbar {
        height: auto;

        min-height: 84px;

        padding:
            15px 0;

        flex-direction: column;
    }

    .logo img {
        width: 135px;
    }

    .nav-links {
        width: 100%;

        justify-content: center;
        flex-wrap: wrap;

        gap:
            8px 18px;
    }

    .nav-links > li > a {
        padding:
            8px 0;
    }

    .nav-links > li > a::after {
        bottom: 0;
    }


    /* Banner */

    .cwm-banner {
        height: 360px;

        margin-top: 175px;
    }


    /* Main page */

    .about-page {
        grid-template-columns: 1fr;

        gap: 45px;
    }

    .about-sidebar {
        position: static;
    }

    .about-sidebar ul {
        display: grid;

        grid-template-columns:
            repeat(2, 1fr);

        gap: 8px;
    }


    /* Gallery */

    .ewaste-gallery {
        grid-template-columns:
            1.25fr 1fr;

        grid-template-rows:
            200px 200px;
    }
}


/* =========================================================
   MOBILE
========================================================= */

@media (max-width: 768px) {

    header {
        position: relative;
    }

    .navbar {
        width: 90%;
    }

    .nav-links {
        flex-direction: column;

        gap: 3px;

        margin-top: 8px;
    }

    .nav-links > li {
        width: 100%;

        text-align: center;
    }

    .nav-links > li > a {
        padding: 9px;

        border-radius: 8px;
    }

    .nav-links > li > a::after {
        display: none;
    }

    .nav-links > li > a:hover {
        background: var(--green-soft);
    }

    .nav-links .nav-btn {
        margin-top: 6px;
    }


    /* Dropdown */

    .dropdown-menu {
        position: static;

        display: none;

        width: 100%;

        margin-top: 5px;

        opacity: 1;
        visibility: visible;

        transform: none;

        background: #f6fbf6;

        border: none;

        box-shadow: none;
    }

    .dropdown:hover .dropdown-menu {
        display: block;

        transform: none;
    }


    /* Banner */

    .cwm-banner {
        width: 92%;

        height: 310px;

        margin-top: 25px;

        border-radius: 25px;
    }

    .banner-content {
        padding:
            45px 30px;
    }

    .banner-content h1 {
        max-width: 550px;

        font-size: 38px;

        letter-spacing: -1.5px;
    }

    .about-cwm-content {
        left: 30px;
        bottom: 25px;
    }


    /* Main */

    .about-page {
        width: 90%;

        margin:
            55px auto 80px;

        gap: 40px;
    }


    /* Sidebar */

    .about-sidebar {
        padding:
            25px 20px;
    }

    .about-sidebar h2 {
        font-size: 27px;
    }

    .about-sidebar ul {
        grid-template-columns: 1fr;
    }


    /* Content */

    .about-content {
        padding: 0;
    }

    .about-content > h1 {
        font-size: 36px;

        letter-spacing: -1px;
    }

    .about-content > p {
        font-size: 14px;

        text-align: left;

        line-height: 1.85;
    }


    /* Gallery */

    .ewaste-gallery {
        grid-template-columns: 1fr;

        grid-template-rows:
            repeat(3, 240px);

        gap: 15px;
    }

    .gallery-item:first-child {
        grid-row: auto;
    }


    /* R&D cards */

    .about-content h3 {
        font-size: 19px;

        padding:
            14px 17px;

        border-left-width: 4px;
    }

    .about-content h3 + p {
        padding:
            20px;

        font-size: 14px;
    }
}


/* =========================================================
   SMALL MOBILE
========================================================= */

@media (max-width: 480px) {

    .cwm-banner {
        height: 290px;
    }

    .banner-content {
        padding:
            35px 22px;
    }

    .banner-content::before {
        padding:
            7px 13px;

        font-size: 8.5px;

        letter-spacing: 1.1px;
    }

    .banner-content h1 {
        font-size: 31px;

        line-height: 1.12;
    }

    .about-cwm-content {
        left: 22px;
    }

    .about-page {
        width: 92%;
    }

    .about-sidebar {
        border-radius: 17px;
    }

    .about-content > h1 {
        font-size: 31px;
    }

    .ewaste-gallery {
        grid-template-rows:
            repeat(3, 210px);
    }

    .gallery-item {
        border-radius: 15px;
    }

    .about-content h3 {
        font-size: 17px;
    }

    .about-content h3 + p {
        padding: 18px;

        font-size: 13.5px;
    }
}