@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

:root {
    --organge-cs: #FDA218;
    --orange-hover: #e08b00;
    --organge-cs-70p: rgba(253, 162, 24, 0.08);
    --black-lv1: #111111;
    --black-lv2: #222222;
    --black-lv3: #18181b;
    --white-lv1: #ffffff;
    --white-lv2: #f4f4f5;
    --basic-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
    --x-gap: 2rem;
    --y-gap: 3rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

body {
    background-color: #fafafa;
    color: var(--black-lv2);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* NAVBAR */
nav#nav {
    padding: 1.25rem 3rem;
    background-color: var(--white-lv1);
    border-bottom: 1px solid #eeeeee;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

#logo-ieeecs {
    height: 48px;
    object-fit: contain;
}

.routes {
    display: flex;
    gap: 2.2rem;
    align-items: center;
    list-style: none;
}

.routes a {
    text-decoration: none;
    color: var(--black-lv2);
    font-weight: 500;
    font-size: 0.95rem;
    padding-bottom: 3px;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.routes a:hover,
.routes a.active {
    color: var(--organge-cs);
    border-bottom: 2px solid var(--organge-cs);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--organge-cs);
    color: white;
    padding: 10px 22px;
}

.btn-primary:hover {
    background-color: var(--orange-hover);
    transform: translateY(-2px);
}

.btn-secondary-black {
    background-color: var(--black-lv2);
    color: white;
    padding: 10px 22px;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s ease;
}

.btn-secondary-black:hover {
    background-color: #333;
    transform: translateY(-2px);
}

/* HERO BANNER */
.banner {
    padding: 60px 5%;
    background: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
    border-bottom: 1px solid #f0f0f0;
}

.banner h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--black-lv1);
}

.banner .slogan {
    color: #555;
    line-height: 1.6;
    margin-top: 10px;
}

.landscape {
    box-shadow: var(--basic-shadow);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.landscape img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease, filter 0.4s ease;
}

.landscape:hover img {
    transform: scale(1.05);
    filter: brightness(0.9);
}

/* SECTIONS */
main > section {
    padding: 4rem 5%;
}

main > section:nth-child(even):not(.dark-section) {
    background-color: #fcfcfc;
}

.dark-section {
    background-color: var(--black-lv3);
    color: var(--white-lv1);
    padding: 4rem 5%;
}

.dark-section h2 {
    color: var(--white-lv1);
}

.dark-section p {
    color: #a1a1aa;
}

/* ELEGANT EVENT CARDS */
.cards-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
}

.event-card {
    display: flex;
    align-items: center;
    gap: 24px;
    background: #ffffff;
    padding: 20px 24px;
    border-radius: 14px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    border: 1px solid #f0f0f0;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.event-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.07);
    border-color: #f3e6d3;
}

.event-card-img-wrapper {
    width: 220px;
    height: 145px;
    border-radius: 10px;
    overflow: hidden;
    flex-shrink: 0;
    background-color: #f5f5f5;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.event-card-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.3s ease;
}

.event-card:hover .event-card-img-wrapper img {
    transform: scale(1.04);
}

.event-card-content {
    flex: 1;
}

.event-card-content h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111111;
    margin-bottom: 8px;
    line-height: 1.35;
}

.event-card-content p {
    font-size: 0.92rem;
    color: #555555;
    line-height: 1.6;
}

/* DIRECTOR CARDS */
.director-card {
    background: #ffffff;
    border-radius: 14px;
    padding: 1.5rem 1rem;
    width: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: var(--basic-shadow);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.director-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--organge-cs);
}

.director-img-wrapper {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: 12px;
    border: 3px solid var(--organge-cs);
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.director-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.director-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--black-lv1);
    line-height: 1.3;
}

.director-role {
    font-size: 0.8rem;
    color: #666;
    margin-top: 4px;
}

/* FOOTER */
footer {
    background-color: #ffffff;
    border-top: 1px solid #eeeeee;
    padding: 40px 5% 25px 5%;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.footer-brand p {
    color: #666;
    font-size: 0.9rem;
    margin-top: 10px;
    max-width: 380px;
}

.footer-nav h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-nav a {
    text-decoration: none;
    color: #666;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-nav a:hover {
    color: var(--organge-cs);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
    font-size: 0.85rem;
    color: #888;
}

/* EVENT HOVER TOOLTIP */
.event-hover-card {
    position: relative;
}

.event-hover-tooltip {
    position: absolute;
    bottom: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    width: max-content;
    max-width: 240px;
    background: var(--black-lv3);
    color: #ffffff;
    padding: 12px 14px;
    border-radius: 10px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.16);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    z-index: 50;
    pointer-events: none;
}

.event-hover-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 7px solid transparent;
    border-top-color: var(--black-lv3);
}

.event-hover-card:hover .event-hover-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.event-hover-tooltip p {
    font-size: 0.7rem;
    line-height: 1.5;
    font-weight: 400;
    margin: 0;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    nav#nav {
        padding: 1rem 1.5rem;
    }

    .banner h1 {
        font-size: 2.2rem;
        text-align: center;
    }

    .banner .slogan {
        text-align: center;
        margin-left: auto;
        margin-right: auto;
    }

    main > section {
        padding: 3rem 1.5rem;
    }

    .event-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .event-card-img-wrapper {
        width: 100%;
        height: 200px;
    }
}