:root {
    --primary-color: #000000;
    --accent-color: #4aa84e;
    --light-bg: #ffffff;
    --card-bg: #f8f9fa; 
    --text-color: #212529;
}

body {
    background-color: var(--light-bg);
    color: var(--text-color);
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

h1, h2, h3, h4, h5 {
    color: var(--primary-color);
    font-weight: 700; 
    text-transform: uppercase; 
    letter-spacing: 0.5px;
}

h1 {
    font-size: clamp(1.4rem, 4vw, 2.2rem); 
    font-weight: 500;
    margin-bottom: 0;
    line-height: 1.1;
    white-space: normal; 
    word-wrap: break-word;
}

.header-subtitle {
    font-size: clamp(0.8rem, 2vw, 1rem);
    color: #666;
    margin-top: 5px;
    white-space: normal;
}

.logo-img {
    height: 50px; 
    width: auto;
    margin-right: 15px;
    flex-shrink: 0; 
}

.btn-success {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: 0; 
    padding: 12px 24px;
    transition: all 0.2s ease;
    white-space: nowrap; 
}

.btn-success:hover, .btn-success:active, .btn-success:focus {
    background-color: #4aa84e !important; 
    border-color: #4aa84e !important;
    box-shadow: 0 4px 10px rgba(85, 205, 91, 0.449);
}

.card {
    border: 1px solid #e9ecef !important; 
    border-radius: 0 !important; 
    background-color: white; 
    box-shadow: none; 
}

.border-primary {
    border-left: 6px solid var(--accent-color) !important;
}

.sticky-top.bg-light {
    background-color: #ffffff !important;
    border-bottom: 2px solid var(--primary-color) !important;
}

.nav-tabs {
    border-bottom: 1px solid #dee2e6;
}

.nav-tabs .nav-link {
    color: #6c757d; 
    font-weight: 700; 
    text-transform: uppercase;
    border: none; 
    border-bottom: 4px solid transparent; 
    transition: color 0.1s, border-bottom 0.1s;
    background: transparent;
}

.nav-tabs .nav-link:hover {
    color: var(--primary-color) !important; 
    border-bottom: 4px solid var(--accent-color) !important; 
    isolation: isolate; 
}

.nav-tabs .nav-link.active {
    color: var(--primary-color) !important; 
    border-bottom: 4px solid var(--accent-color) !important; 
    background-color: transparent;
}

.badge {
    border-radius: 0;
    font-weight: 600;
}

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

.badge.bg-light {
    background-color: #e9ecef !important;
    color: #000 !important;
}

.badge.bg-secondary {
    background-color: var(--accent-color) !important;
    color: white !important;
}

.event-type-talk {
    background-color: #4aa84e !important;
    color: white !important;
}

.event-type-workshop {
    background-color: #75b376 !important;
    color: white !important;
}

.event-type-discussion {
    background-color: #f7b731 !important;
    color: #000 !important;
}

.event-type-hands-on {
    background-color: #9ccaf8 !important;
    color: #000 !important;
}

.event-type-game {
    background-color: #0984e3 !important;
    color: white !important;
}

.event-type-infobooth {
    background-color: #7a367b !important;
    color: white !important;
}

.event-type-other {
    background-color: #a23e8c !important;
    color: white !important;
}

.event-type-meeting {
    background-color: #f8e5a1 !important;
    color: #000 !important;
}

.event-type-exhibition {
    background-color: #109a7e !important;
    color: white !important;
}

.border-type-talk {
    border-left: 6px solid #4aa84e !important;
}

.border-type-workshop {
    border-left: 6px solid #75b376 !important;
}

.border-type-discussion {
    border-left: 6px solid #f7b731 !important;
}

.border-type-hands-on {
    border-left: 6px solid #9ccaf8 !important;
}

.border-type-game {
    border-left: 6px solid #0984e3 !important;
}

.border-type-infobooth {
    border-left: 6px solid #7a367b !important;
}

.border-type-other {
    border-left: 6px solid #a23e8c !important;
}

.border-type-meeting {
    border-left: 6px solid #f8e5a1 !important;
}

.border-type-exhibition {
    border-left: 6px solid #109a7e !important;
}

.alert-light {
    background-color: #ffffff;
    border: 2px solid var(--primary-color); 
    color: var(--text-color);
    border-radius: 0;
}

.alert-heading {
    color: var(--accent-color) !important; 
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
}