/* Alle standaard styling verwijderen */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* variabelen voor de fonts */
:root {
    --ff-main: "Roboto", sans-serif;
    --ff-accent: "Poppins", sans-serif;
}

body {
    background: 
        linear-gradient(
            180deg,
            rgba(0, 0, 0, 0.5) 0%,
            rgba(28, 28, 37, 0.8) 60%,
            rgba(22, 22, 54, 0.8) 70%,
            rgba(31, 2, 85, 0.8) 80%,
            rgba(0, 123, 255, 0.8) 100%
        ),
        url("../images/background.png") center top/cover no-repeat fixed;
    font-family: var(--ff-main);
    font-weight: 400;
    font-size: 16px;
    color: #ffffff;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header */

/* Main*/

/* Hero */
.hero {
    text-align: center;
    padding: 80px 20px;
    background: 
        radial-gradient(circle at 50% 50%, #6c2ebd 0%, transparent 50%),
       }

.hero h1 {
    font-size: 4rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #6610F2, #007BFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.8;
}

/* Date Selector */


.date-selector {
    display: flex;
    gap: 20px;
    margin-bottom: 0;
}

.date-btn {
    background: linear-gradient(45deg, #6610F2, #007BFF);
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 16px;
    box-shadow: 0 3px 5px #3910f2;
}

.date-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.3);
}

.date-btn.active {
    background: linear-gradient(45deg, #007BFF, #6610F2);
}

.header-cta {
    display: flex;
    align-items: center;
}

.cta-button-header {
    background: white;
    color: #6c2ebd;
    border: none;
    padding: 15px 30px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(102, 16, 242, 0.25);
    position: relative;
    overflow: hidden;
    text-transform: none;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.cta-button-header:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(102, 16, 242, 0.35);
    background: #f8f9ff;
}

.cta-button-header:active {
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(102, 16, 242, 0.25);
}

.cta-button-header::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(102, 16, 242, 0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    border-radius: 50%;
    transition: all 0.6s ease;
    z-index: -1;
}

.cta-button-header:hover::before {
    width: 200%;
    height: 200%;
}

.main-content {
    max-width: 1275px;
    margin: 0 auto 60px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 40px; 
    align-items: start;
    margin-left: calc(50% - 615px);
}

@media (max-width: 768px) {
    .program-controls {
        flex-direction: column;
        gap: 20px;
    }
    
    .main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}


/* Filter */
.filter-section {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    height: fit-content;
    border: 0.1px solid #007bff42;
}

.search-box, .filter-select {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 20px;
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.3);
    color: white;
    font-size: 14px;
}

.search-box::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.reset-btn {
    background: transparent;
    border: 1px solid #6710f2a4;
    color: #dfdbe9;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

.reset-btn:hover {
    background: #6610F2;
    color: white;
}

/* Programma */

.program-controls {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    max-width: 1050px;
    margin: 0 auto;
    padding: 0 20px;
    margin-left: calc(50% - 525px + 290px);
}

.program-section-header {
    text-align: center;
    margin: 20px auto 30px auto;
    max-width: 1000px; 
    padding: 0 20px;
}

.program-section-header h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #6610F2, #007BFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.program-section-header p {
    font-size: 1.1rem;
    opacity: 0.8;
    color: #e0e0e0;
}

.time-slot {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.parallel-sessions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.single-session {
    display: grid;
    grid-template-columns: 1fr;
}

.program-grid {
    display: flex;
    flex-direction: column;
    margin-right: 40px;
}

.program-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    border: 1px solid rgba(139, 92, 246, 0.2);
    transition: all 0.3s;
    cursor: pointer;
    margin: 5px;
}

.program-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(139, 92, 246, 0.2);
    border-color: #8b5cf6;
}

.program-card h4 {
    color: #007BFF;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.program-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
    opacity: 0.8;
    font-size: 14px;
}

.program-time {
    color: #ffffff;
    font-weight: bold;
}

.program-speaker {
    color: #9665e4;
    font-weight: bold;
    font-size: 15px;
}

.program-card.break-event {
    background: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.3);
}

.program-card.opening-event, .program-card.closing-event {
    background: rgba(139, 92, 246, 0.15);
    border-color: rgba(139, 92, 246, 0.4);
    text-align: center;
}

.program-card.continuous-event {
    background: linear-gradient(45deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
    border: 2px dashed rgba(139, 92, 246, 0.5);
}

/* Meet the Speakers */
.speakers-section {
    max-width: 1400px;
    margin: 80px auto;
    padding: 0 20px;
    text-align: center;
}

.speakers-section h2 {
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: white;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.speaker-card {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 30px 20px;
    transition: all 0.3s ease;
    border: 1px solid rgba(139, 92, 246, 0.2);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 280px;
}

.speaker-card:hover {
    transform: translateY(-8px);
    background: rgba(139, 92, 246, 0.15);
    border-color: rgba(139, 92, 246, 0.4);
    box-shadow: 0 15px 35px rgba(139, 92, 246, 0.2);
}

.speaker-avatar-1 {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px auto;
    display: flex;
    overflow: hidden;
    border: 3px solid rgba(139, 92, 246, 0.3);
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.speaker-avatar-2 {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px auto;
    display: flex;
    overflow: hidden;
    border: 3px solid rgba(139, 92, 246, 0.3);
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.speaker-avatar-3 {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px auto;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 3px solid rgba(139, 92, 246, 0.3);
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.speaker-avatar-4 {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px auto;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 3px solid rgba(139, 92, 246, 0.3);
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.speaker-avatar-1 img {
    width: 100%;
    height: 125%;
    object-fit: cover;
    border-radius: 50%;
}

.speaker-avatar-2 img {
    width: 100%;
    height: 130%;
    object-fit: cover;
    border-radius: 50%;
}

.speaker-avatar-3 img {
    object-position: 35%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.speaker-avatar-4 img {
    object-position: 15%;
    width: 100%;
    height: 115%;
    object-fit: cover;
    border-radius: 50%;
}

.speaker-name {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: #ffffff;
    font-weight: 600;
    min-height: 1.6em;
}

.speaker-title {
    opacity: 0.8;
    font-size: 0.95rem;
    line-height: 1.4;
    color: #e0e0e0;
    text-align: center;
    margin-top: auto;
    margin-bottom: auto;
}

/* Aanmelden */
.registration-section {
    background: linear-gradient(45deg, #6610F2, #007BFF);
    padding: 60px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.registration-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 20s linear infinite;
}

@keyframes float {
    0% { transform: translate(-50px, -50px) rotate(0deg); }
    100% { transform: translate(-50px, -50px) rotate(360deg); }
}

.registration-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.registration-section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.registration-section p {
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.cta-button {
    background: white;
    color: #6c2ebd;
    border: none;
    padding: 20px 40px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.star-burst {
    position: absolute;
    top: 50%;
    right: -100px;
    transform: translateY(-50%);
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.1);
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translateY(-50%) scale(1); }
    50% { transform: translateY(-50%) scale(1.1); }
}

/* Footer */