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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page {
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* Login/Register */
.auth-form {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    margin: 100px auto;
}

.auth-form h2 {
    margin-bottom: 20px;
    color: #667eea;
}

.auth-form input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.auth-form button {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.auth-form button:hover {
    background: #5568d3;
}

.auth-form p {
    margin-top: 15px;
    text-align: center;
    color: #666;
}

.auth-form a {
    color: #667eea;
    text-decoration: none;
}

.error {
    color: #e74c3c;
    font-size: 14px;
}

/* Dashboard */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    color: white;
}

#logout-btn {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid white;
    border-radius: 5px;
    cursor: pointer;
}

.create-section {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.create-section input {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
}

.create-section button {
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    white-space: nowrap;
}

#slideshows-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.slideshow-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform 0.3s;
}

.slideshow-card:hover {
    transform: translateY(-5px);
}

.slideshow-card h3 {
    color: #667eea;
    margin-bottom: 10px;
}

.slideshow-card .status {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: bold;
}

.status.draft {
    background: #f39c12;
    color: white;
}

.status.active {
    background: #27ae60;
    color: white;
}

.status.finished {
    background: #95a5a6;
    color: white;
}

/* Slideshow Page */
.slideshow-header {
    background: rgba(255, 255, 255, 0.9);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.slideshow-header button {
    padding: 10px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#slideshow-player {
    display: flex;
    justify-content: center;
    align-items: center;
    height: calc(100vh - 70px);
}

#slide-container {
    text-align: center;
    max-width: 90%;
    max-height: 90%;
}

#current-slide {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

#slide-message {
    margin-top: 20px;
    font-size: 24px;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

#no-uploads {
    font-size: 24px;
    color: white;
}

/* Modal */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 30px;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

#qr-code {
    margin: 20px 0;
    display: flex;
    justify-content: center;
}

#client-url {
    margin-top: 20px;
    padding: 10px;
    background: #f5f5f5;
    border-radius: 5px;
    word-break: break-all;
}