:root {
    --primary-color: #05C3DE;
    --secondary-color: #04adc5;
    --accent-color: #f7941d;
    --text-color: #333333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Open Sans', sans-serif;
    font-size: 16px;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: #fcfcfc;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-color);
}

/* Navigation */
#navigation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    z-index: 1000;
    box-shadow: var(--shadow);
    padding: 10px 0;
}

#navigation a {
    display: inline-block;
    color: var(--text-color);
    font-weight: 600;
    padding: 10px 15px;
    border-radius: 8px;
    margin: 0 5px;
    text-decoration: none;
}

#navigation a:hover, #navigation a.active {
    background-color: var(--primary-color);
    color: var(--white) !important;
}

/* Sections */
section {
    padding: 80px 0;
}

section h2 {
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

section h2::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

/* Header / Hero */
header {
    padding-top: 100px;
    margin: 0;
}

#slide {
    height: 350px;
    width: 100%;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    transition: background-image 1s ease-in-out;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

/* Cards & Blocks */
#reasons .shadow-sm {
    box-shadow: 0 10px 30px rgba(5, 195, 222, 0.15) !important;
    transition: var(--transition);
}

#reasons .shadow-sm:hover {
    box-shadow: 0 15px 35px rgba(5, 195, 222, 0.25) !important;
    transform: translateY(-5px);
}

.block_header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 25px;
    border-radius: 15px 15px 0 0;
    font-weight: 700;
    font-size: 1.2rem;
    text-transform: uppercase;
}

.block_body {
    background-color: var(--white);
    padding: 35px;
    border-radius: 0 0 15px 15px;
    box-shadow: var(--shadow);
}

/* Committees & Topics */
.committee_switch, .topic_switch, .programme_switch {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
}

.committee_switch a, .topic_switch a, .programme_switch a {
    flex: 1;
    min-width: 220px;
    text-align: center;
    background-color: var(--white);
    padding: 18px;
    border-radius: 12px;
    color: var(--text-color);
    font-weight: 600;
    border: 1px solid #eee;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.committee_switch a.active, .topic_switch a.active, .programme_switch a.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.committee_list .block_body div, .topic_description .block_body div, .programme_list .block_body div {
    display: none;
}

.committee_list .block_body div.active, .topic_description .block_body div.active, .programme_list .block_body div.active {
    display: block;
}

/* Deadlines & Registration Overlays */
.deadlines_wrapper, .registration_wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    color: var(--white);
    margin: 40px 0;
}

.deadlines_overlay, .registration_overlay {
    background-color: rgba(5, 195, 222, 0.9);
    padding: 80px 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 400px;
}

.deadlines_overlay h2::after, .registration_overlay h2::after {
    background-color: var(--white);
}

/* Tables */
.table {
    border-radius: 15px;
    overflow: hidden;
    background: white;
}

.table tr td {
    padding: 15px;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 14px 35px;
    font-weight: 700;
    border-radius: 50px;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(5, 195, 222, 0.3);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: 50px;
    padding: 10px 25px;
    transition: var(--transition);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

/* Nav Pills */
.nav-pills .nav-link.active, .nav-pills .show > .nav-link {
    background-color: var(--primary-color);
    color: var(--white);
}

.nav-pills .nav-link {
    color: var(--text-color);
}

.nav-pills .nav-link:hover:not(.active) {
    color: var(--primary-color);
}

/* Footer */
footer {
    background-color: #111;
    color: #bbb;
    padding: 80px 0;
}

footer h2 {
    color: var(--white);
    margin-bottom: 30px;
}

footer strong {
    color: var(--white);
}

/* Utility */
.vPadding { padding: 20px 0; }
.img-thumbnail { border-radius: 15px; border: none; box-shadow: var(--shadow); }

/* Responsive */
@media (max-width: 991px) {
    #navigation .text-right {
        text-align: center !important;
        margin-top: 15px;
    }
    nav a {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
}

@media print {
    body {
        zoom: 80%;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    #navigation {
        position: static;
        box-shadow: none;
    }
    header {
        padding-top: 20px;
    }
}