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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1e1e1e 0%, #2d2d30 100%);
    color: #d4d4d4;
    min-height: 100vh;
    padding: 20px;
}

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

.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
}

.header h1 {
    font-size: 42px;
    color: #ffffff;
    margin-bottom: 10px;
}

.header p {
    font-size: 16px;
    color: #858585;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.card {
    background: #252526;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.card h2 {
    font-size: 24px;
    color: #ffffff;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: #cccccc;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    background: #3c3c3c;
    color: #d4d4d4;
    border: 1px solid #3e3e42;
    padding: 12px 15px;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #007acc;
}

.form-group input::placeholder {
    color: #858585;
}

.btn {
    width: 100%;
    background: #0e639c;
    color: #ffffff;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: #1177bb;
}

.btn:active {
    background: #0d5a8f;
}

.room-list {
    max-height: 400px;
    overflow-y: auto;
}

.room-item {
    background: #2d2d30;
    border: 1px solid #3e3e42;
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.room-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 122, 204, 0.2);
    border-color: #007acc;
}

.room-info h3 {
    font-size: 18px;
    color: #ffffff;
    margin-bottom: 8px;
}

.room-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: #858585;
}

.room-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.join-btn {
    background: #0e639c;
    color: #ffffff;
    border: none;
    padding: 10px 24px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.join-btn:hover {
    background: #1177bb;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #858585;
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 16px;
}

.badge {
    display: inline-block;
    background: #0e639c;
    color: #ffffff;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: #252526;
    border-radius: 8px;
    padding: 30px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-content h3 {
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 20px;
}

.modal-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.modal-buttons button {
    flex: 1;
}

.btn-secondary {
    background: #3c3c3c;
}

.btn-secondary:hover {
    background: #505050;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 32px;
    }
}